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简单搭建一个前后台分离的增删改查-上

作者:快盘下载 人气:28

目录

一、先创建一个Maven项目

二、下载相关依赖及相关插件

1.依赖下载

2.插件下载

三、导入相关文件依赖

1.修改目录结构

2.导入相关依赖文件

2.1 相关文件代码

2.2 添加工具类

三、逆向生成

1.设置逆向生成指令

2.执行指令;逆向生成

3.开发代码

3.1 在BookMapper.xml里添加方法

3.2 在 BookMapper 里添加对应的方法

3.3 创建biz

3.4 实现biz中的方法

4.5 测试方法

一、先创建一个Maven项目

简单搭建一个前后台分离的增删改查-上

 

下一步

简单搭建一个前后台分离的增删改查

 下一步

简单搭建一个前后台分离的增删改查

上

之后点击Finish;然后进入等待;下面加载完;即创建成功

上

二、下载相关依赖及相关插件

1.依赖下载

将下列一次添加或者覆盖进pom.xml文件中

①------------------------------------------------------------

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>
 
    <!--添加jar包依赖-->
    <!--1.spring 5.0.2.RELEASE相关-->
    <spring.version>5.0.2.RELEASE</spring.version>
    <!--2.mybatis相关-->
    <mybatis.version>3.4.5</mybatis.version>
    <!--mysql-->
    <mysql.version>5.1.44</mysql.version>
    <!--pagehelper分页jar依赖-->
    <pagehelper.version>5.1.2</pagehelper.version>
    <!--mybatis与spring集成jar依赖-->
    <mybatis.spring.version>1.3.1</mybatis.spring.version>
    <!--3.dbcp2连接池相关 druid-->
    <commons.dbcp2.version>2.1.1</commons.dbcp2.version>
    <commons.pool2.version>2.4.3</commons.pool2.version>
    <!--4.log日志相关-->
    <log4j2.version>2.9.1</log4j2.version>
    <!--5.其他-->
    <junit.version>4.12</junit.version>
    <servlet.version>4.0.0</servlet.version>
    <lombok.version>1.18.2</lombok.version>
  </properties>

 ②------------------------------------------------------------

  <dependencies>
      <!--1.spring相关-->
      <dependency>
        <groupId>org.springFramework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${spring.version}</version>
      </dependency>
 
      <!--2.mybatis相关-->
      <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>${mybatis.version}</version>
      </dependency>
      <!--mysql-->
      <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>${mysql.version}</version>
      </dependency>
      <!--pagehelper分页插件jar包依赖-->
      <dependency>
        <groupId>com.github.pagehelper</groupId>
        <artifactId>pagehelper</artifactId>
        <version>${pagehelper.version}</version>
      </dependency>
      <!--mybatis与spring集成jar包依赖-->
      <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>${mybatis.spring.version}</version>
      </dependency>
 
      <!--3.dbcp2连接池相关-->
      <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-dbcp2</artifactId>
        <version>${commons.dbcp2.version}</version>
      </dependency>
      <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-pool2</artifactId>
        <version>${commons.pool2.version}</version>
      </dependency>
 
      <!--4.log日志相关依赖-->
      <!--核心log4j2jar包-->
      <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-core</artifactId>
        <version>${log4j2.version}</version>
      </dependency>
      <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-api</artifactId>
        <version>${log4j2.version}</version>
      </dependency>
      <!--web工程需要包含log4j-web;非web工程不需要-->
      <dependency>
        <groupId>org.apache.logging.log4j</groupId>
        <artifactId>log4j-web</artifactId>
        <version>${log4j2.version}</version>
      </dependency>
 
      <!--5.其他-->
      <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>${junit.version}</version>
        <scope>test</scope>
      </dependency>
      <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>${servlet.version}</version>
        <scope>provided</scope>
      </dependency>
      <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>${lombok.version}</version>
        <scope>provided</scope>
      </dependency>
 
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring.version}</version>
      </dependency>
 
      <!--jsp文件中c标签的使用-->
      <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
      </dependency>
      <dependency>
        <groupId>taglibs</groupId>
        <artifactId>standard</artifactId>
        <version>1.1.2</version>
      </dependency>
 
      <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.9.3</version>
      </dependency>
      <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>2.9.3</version>
      </dependency>
      <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-annotations</artifactId>
        <version>2.9.3</version>
      </dependency>
  </dependencies>

 ③------------------------------------------------------------

<resources>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.xml</include>
        </includes>
      </resource>
      <!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>jdbc.properties</include>
          <include>*.xml</include>
        </includes>
      </resource>
    </resources>

 ④--------------------------------------------------------------

 <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>${maven.compiler.plugin.version}</version>
          <configuration>
            <source>${maven.compiler.source}</source>
            <target>${maven.compiler.target}</target>
            <encoding>${project.build.sourceEncoding}</encoding>
          </configuration>
        </plugin>
        <plugin>
          <groupId>org.mybatis.generator</groupId>
          <artifactId>mybatis-generator-maven-plugin</artifactId>
          <version>1.3.2</version>
          <dependencies>
            <!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
            <dependency>
              <groupId>mysql</groupId>
              <artifactId>mysql-connector-java</artifactId>
              <version>${mysql.version}</version>
            </dependency>
          </dependencies>
          <configuration>
            <overwrite>true</overwrite>
          </configuration>
        </plugin>
      </plugins>
    </pluginManagement>

2.插件下载

简单搭建一个前后台分离的增删改查

三、导入相关文件依赖

1.修改目录结构

简单搭建一个前后台分离的增删改查

2.导入相关依赖文件

上

2.1 相关文件代码

以下配置文件中有关于下列这类型的地址栏;请修改成util根目录的上一级

com/xx/**/mapper/*.xml;
com.xx

例如;com.hn.ssm.util    取com.hn.ssm

           改为   com.hn.ssm

           com/hn/ssm/**/mapper/*.xml;

applicationContext.xml

<?xml version=;1.0; encoding=;UTF-8;?>
<beans xmlns=;http://www.springframework.org/schema/beans;
       xmlns:xsi=;http://www.w3.org/2001/XMLSchema-instance;
       xmlns:context=;http://www.springframework.org/schema/context; xmlns:tx=;http://www.springframework.org/schema/tx;
       xmlns:aop=;http://www.springframework.org/schema/aop;
       xsi:schemaLocation=;http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd;>
 
<import resource=;applicationContext-mybatis.xml;></import>
</beans>

applicationContext-mybatis.xml

<?xml version=;1.0; encoding=;UTF-8;?>
<beans xmlns=;http://www.springframework.org/schema/beans;
       xmlns:xsi=;http://www.w3.org/2001/XMLSchema-instance;
       xmlns:context=;http://www.springframework.org/schema/context; xmlns:tx=;http://www.springframework.org/schema/tx;
       xmlns:aop=;http://www.springframework.org/schema/aop;
       xsi:schemaLocation=;http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd;>
    <!--1. 注解式开发 -->
    <!-- 注解驱动 -->
    <context:annotation-config/>
    <!-- 用注解方式注入bean;并指定查找范围;com.xx.ssm及子子孙孙包-->
    <context:component-scan base-package=;com.xx;/>
 
    <context:property-placeholder location=;classpath:jdbc.properties;/>
 
    <bean id=;dataSource; class=;org.apache.commons.dbcp2.BasicDataSource;
          destroy-method=;close;>
        <property name=;driverClassName; value=;${jdbc.driver};/>
        <property name=;url; value=;${jdbc.url};/>
        <property name=;username; value=;${jdbc.username};/>
        <property name=;password; value=;${jdbc.password};/>
        <!--初始连接数-->
        <property name=;initialSize; value=;10;/>
        <!--最大活动连接数-->
        <property name=;maxTotal; value=;100;/>
        <!--最大空闲连接数-->
        <property name=;maxIdle; value=;50;/>
        <!--最小空闲连接数-->
        <property name=;minIdle; value=;10;/>
        <!--设置为-1时;如果没有可用连接;连接池会一直无限期等待;直到获取到连接为止。-->
        <!--如果设置为N;毫秒;;则连接池会等待N毫秒;等待不到;则抛出异常-->
        <property name=;maxWaitMillis; value=;-1;/>
    </bean>
 
    <!--4. spring和MyBatis整合 -->
    <!--1) 创建sqlSessionFactory-->
    <bean id=;sqlSessionFactory; class=;org.mybatis.spring.SqlSessionFactoryBean;>
        <!-- 指定数据源 -->
        <property name=;dataSource; ref=;dataSource;/>
        <!-- 自动扫描XxxMapping.xml文件;**任意路径 -->
        <property name=;mapperLocations; value=;classpath*:com/xx/**/mapper/*.xml;/>
        <!-- 指定别名 -->
        <property name=;typeAliasesPackage; value=;com/xx/**/model;/>
        <!--配置pagehelper插件-->
        <property name=;plugins;>
            <array>
                <bean class=;com.github.pagehelper.PageInterceptor;>
                    <property name=;properties;>
                        <value>
                            helperDialect=mysql
                        </value>
                    </property>
                </bean>
            </array>
        </property>
    </bean>
 
    <!--2) 自动扫描com/javaxl/ssm/**/mapper下的所有XxxMapper接口(其实就是DAO接口);并实现这些接口;-->
    <!--   即可直接在程序中使用dao接口;不用再获取sqlsession对象-->
    <bean class=;org.mybatis.spring.mapper.MapperScannerConfigurer;>
        <!--basePackage 属性是映射器接口文件的包路径。-->
        <!--你可以使用分号或逗号 作为分隔符设置多于一个的包路径-->
        <property name=;basePackage; value=;com/xx/**/mapper;/>
        <property name=;sqlSessionFactoryBeanName; value=;sqlSessionFactory;/>
    </bean>
 
    <bean id=;transactionManager; class=;org.springframework.jdbc.datasource.DataSourceTransactionManager;>
        <property name=;dataSource; ref=;dataSource; />
    </bean>
    <tx:annotation-driven transaction-manager=;transactionManager; />
    <aop:aspectj-autoproxy/>
</beans>

generatorConfig.xml

注;此文件需要指定数据库jdbc驱动jar包的位置;以及配置表信息(看仔细点)

<?xml version=;1.0; encoding=;UTF-8; ?>
<!DOCTYPE generatorConfiguration PUBLIC ;-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN;
        ;http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd; >
<generatorConfiguration>
    <!-- 引入配置文件 -->
    <properties resource=;jdbc.properties;/>
 
    <!--指定数据库jdbc驱动jar包的位置-->
    <classPathEntry location=;E:toolsmavenmvn_repositorymysqlmysql-connector-java5.1.44mysql-connector-java-5.1.44.jar;/>
 
    <!-- 一个数据库一个context -->
    <context id=;infoGuardian;>
        <!-- 注释 -->
        <commentGenerator>
            <property name=;suppressAllComments; value=;true;/><!-- 是否取消注释 -->
            <property name=;suppressDate; value=;true;/> <!-- 是否生成注释代时间戳 -->
        </commentGenerator>
 
        <!-- jdbc连接 -->
        <jdbcConnection driverClass=;${jdbc.driver};
                        connectionURL=;${jdbc.url}; userId=;${jdbc.username}; password=;${jdbc.password};/>
 
        <!-- 类型转换 -->
        <javaTypeResolver>
            <!-- 是否使用bigDecimal; false可自动转化以下类型;Long, Integer, Short, etc.; -->
            <property name=;forceBigDecimals; value=;false;/>
        </javaTypeResolver>
 
        <!-- 01 指定javaBean生成的位置 -->
        <!-- targetPackage;指定生成的model生成所在的包名 -->
        <!-- targetProject;指定在该项目下所在的路径  -->
        <javaModelGenerator targetPackage=;com.xx.model;
                            targetProject=;src/main/java;>
            <!-- 是否允许子包;即targetPackage.schemaName.tableName -->
            <property name=;enableSubPackages; value=;false;/>
            <!-- 是否对model添加构造函数 -->
            <property name=;constructorBased; value=;true;/>
            <!-- 是否针对string类型的字段在set的时候进行trim调用 -->
            <property name=;trimStrings; value=;false;/>
            <!-- 建立的Model对象是否 不可改变  即生成的Model对象不会有 setter方法;只有构造方法 -->
            <property name=;immutable; value=;false;/>
        </javaModelGenerator>
 
        <!-- 02 指定sql映射文件生成的位置 -->
        <sqlMapGenerator targetPackage=;com.xx.mapper;
                         targetProject=;src/main/java;>
            <!-- 是否允许子包;即targetPackage.schemaName.tableName -->
            <property name=;enableSubPackages; value=;false;/>
        </sqlMapGenerator>
 
        <!-- 03 生成XxxMapper接口 -->
        <!-- type=;ANNOTATEDMAPPER;,生成Java Model 和基于注解的Mapper对象 -->
        <!-- type=;MIXEDMAPPER;,生成基于注解的Java Model 和相应的Mapper对象 -->
        <!-- type=;XMLMAPPER;,生成SQLMap XML文件和独立的Mapper接口 -->
        <javaClientGenerator targetPackage=;com.xx.mapper;
                             targetProject=;src/main/java; type=;XMLMAPPER;>
            <!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model; true:com.oop.eksp.user.model.[schemaName] -->
            <property name=;enableSubPackages; value=;false;/>
        </javaClientGenerator>
 
        <!-- 配置表信息 -->
        <!-- schema即为数据库名 -->
        <!-- tableName为对应的数据库表 -->
        <!-- domainObjectName是要生成的实体类 -->
        <!-- enable*ByExample是否生成 example类 -->
        <!--<table schema=;; tableName=;t_book; domainObjectName=;Book;-->
        <!--enableCountByExample=;false; enableDeleteByExample=;false;-->
        <!--enableSelectByExample=;false; enableUpdateByExample=;false;>-->
        <!--&lt;!&ndash; 忽略列;不生成bean 字段 &ndash;&gt;-->
        <!--&lt;!&ndash; <ignoreColumn column=;FRED; /> &ndash;&gt;-->
        <!--&lt;!&ndash; 指定列的java数据类型 &ndash;&gt;-->
        <!--&lt;!&ndash; <columnOverride column=;LONG_VARCHAR_FIELD; jdbcType=;VARCHAR; /> &ndash;&gt;-->
        <!--</table>-->
        <table schema=;; tableName=;t_mvc_book; domainObjectName=;Book;
               enableCountByExample=;false; enableDeleteByExample=;false;
               enableSelectByExample=;false; enableUpdateByExample=;false;>
        </table>
 
 
    </context>
</generatorConfiguration>

jdbc.properties

此文件注意需修改数据库名;用户名及密码(二三四行)

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/DatabaseName?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123456

log4j2.xml 

<?xml version=;1.0; encoding=;UTF-8;?>
 
<!-- status : 指定log4j本身的打印日志的级别.ALL< Trace < DEBUG < INFO < WARN < ERROR
	< FATAL < OFF。 monitorInterval : 用于指定log4j自动重新配置的监测间隔时间;单位是s,最小是5s. -->
<Configuration status=;WARN; monitorInterval=;30;>
    <Properties>
        <!-- 配置日志文件输出目录 ${sys:user.home} -->
        <Property name=;LOG_HOME;>/root/workspace/lucenedemo/logs</Property>
        <property name=;ERROR_LOG_FILE_NAME;>/root/workspace/lucenedemo/logs/error</property>
        <property name=;WARN_LOG_FILE_NAME;>/root/workspace/lucenedemo/logs/warn</property>
        <property name=;PATTERN;>%d{yyyy-MM-dd HH:mm:ss.SSS} [%t-%L] %-5level %logger{36} - %msg%n</property>
    </Properties>
 
    <Appenders>
        <!--这个输出控制台的配置 -->
        <Console name=;Console; target=;SYSTEM_OUT;>
            <!-- 控制台只输出level及以上级别的信息(onMatch),其他的直接拒绝(onMismatch) -->
            <ThresholdFilter level=;trace; onMatch=;ACCEPT;
                             onMismatch=;DENY; />
            <!-- 输出日志的格式 -->
            <!-- %d{yyyy-MM-dd HH:mm:ss, SSS} : 日志生产时间 %p : 日志输出格式 %c : logger的名称
                %m : 日志内容;即 logger.info(;message;) %n : 换行符 %C : Java类名 %L : 日志输出所在行数 %M
                : 日志输出所在方法名 hostName : 本地机器名 hostAddress : 本地ip地址 -->
            <PatternLayout pattern=;${PATTERN}; />
        </Console>
 
        <!--文件会打印出所有信息;这个log每次运行程序会自动清空;由append属性决定;这个也挺有用的;适合临时测试用 -->
        <!--append为TRUE表示消息增加到指定文件中;false表示消息覆盖指定的文件内容;默认值是true -->
        <File name=;log; fileName=;logs/test.log; append=;false;>
            <PatternLayout
                    pattern=%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n; />
        </File>
        <!-- 这个会打印出所有的info及以下级别的信息;每次大小超过size; 则这size大小的日志会自动存入按年份-月份建立的文件夹下面并进行压缩;作为存档 -->
        <RollingFile name=;RollingFileInfo; fileName=;${LOG_HOME}/info.log;
                     filePattern=;${LOG_HOME}/$${date:yyyy-MM}/info-%d{yyyy-MM-dd}-%i.log;>
            <!--控制台只输出level及以上级别的信息;onMatch;;其他的直接拒绝;onMismatch; -->
            <ThresholdFilter level=;info; onMatch=;ACCEPT;
                             onMismatch=;DENY; />
            <PatternLayout
                    pattern=%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n; />
            <Policies>
                <!-- 基于时间的滚动策略;interval属性用来指定多久滚动一次;默认是1 hour。 modulate=true用来调整时间;比如现在是早上3am;interval是4;那么第一次滚动是在4am;接着是8am;12am...而不是7am. -->
                <!-- 关键点在于 filePattern后的日期格式;以及TimeBasedTriggeringPolicy的interval; 日期格式精确到哪一位;interval也精确到哪一个单位 -->
                <!-- log4j2的按天分日志文件 : info-%d{yyyy-MM-dd}-%i.log -->
                <TimeBasedTriggeringPolicy interval=;1;
                                           modulate=;true; />
                <!-- SizeBasedTriggeringPolicy:Policies子节点; 基于指定文件大小的滚动策略;size属性用来定义每个日志文件的大小. -->
                <!-- <SizeBasedTriggeringPolicy size=;2 kB; /> -->
            </Policies>
        </RollingFile>
 
        <RollingFile name=;RollingFileWarn; fileName=;${WARN_LOG_FILE_NAME}/warn.log;
                     filePattern=;${WARN_LOG_FILE_NAME}/$${date:yyyy-MM}/warn-%d{yyyy-MM-dd}-%i.log;>
            <ThresholdFilter level=;warn; onMatch=;ACCEPT;
                             onMismatch=;DENY; />
            <PatternLayout
                    pattern=%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n; />
            <Policies>
                <TimeBasedTriggeringPolicy />
                <SizeBasedTriggeringPolicy size=;2 kB; />
            </Policies>
            <!-- DefaultRolloverStrategy属性如不设置;则默认为最多同一文件夹下7个文件;这里设置了20 -->
            <DefaultRolloverStrategy max=;20; />
        </RollingFile>
 
        <RollingFile name=;RollingFileError; fileName=;${ERROR_LOG_FILE_NAME}/error.log;
                     filePattern=;${ERROR_LOG_FILE_NAME}/$${date:yyyy-MM}/error-%d{yyyy-MM-dd-HH-mm}-%i.log;>
            <ThresholdFilter level=;error; onMatch=;ACCEPT;
                             onMismatch=;DENY; />
            <PatternLayout
                    pattern=%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n; />
            <Policies>
                <!-- log4j2的按分钟 分日志文件 : warn-%d{yyyy-MM-dd-HH-mm}-%i.log -->
                <TimeBasedTriggeringPolicy interval=;1;
                                           modulate=;true; />
                <!-- <SizeBasedTriggeringPolicy size=;10 MB; /> -->
            </Policies>
        </RollingFile>
 
    </Appenders>
 
    <!--然后定义logger;只有定义了logger并引入的appender;appender才会生效 -->
    <Loggers>
        <!--过滤掉spring和mybatis的一些无用的DEBUG信息 -->
        <logger name=;org.springframework; level=;INFO;></logger>
        <logger name=;org.mybatis; level=;INFO;></logger>
 
        <!-- 第三方日志系统 -->
        <logger name=;org.springframework; level=;ERROR; />
        <logger name=;org.hibernate; level=;ERROR; />
        <logger name=;org.apache.struts2; level=;ERROR; />
        <logger name=;com.opensymphony.xwork2; level=;ERROR; />
        <logger name=;org.jboss; level=;ERROR; />
 
 
        <!-- 配置日志的根节点 -->
        <root level=;all;>
            <appender-ref ref=;Console; />
            <appender-ref ref=;RollingFileInfo; />
            <appender-ref ref=;RollingFileWarn; />
            <appender-ref ref=;RollingFileError; />
        </root>
 
    </Loggers>
 
</Configuration>

mybatis.cfg.xml

注;每逆向生成一个数据库表对应的实体类;下面mappers之间都需添加一个对应的标签

<mappers>
        <mapper resource=;com/xx/mapper/BookMapper.xml;/>
 </mappers>

<?xml version=;1.0; encoding=;UTF-8;?>
<!DOCTYPE configuration PUBLIC ;-//mybatis.org//DTD Config 3.0//EN; ;http://mybatis.org/dtd/mybatis-3-config.dtd;>
<configuration>
    <!-- 引入外部配置文件 -->
    <properties resource=;jdbc.properties;/>
 
    <settings>
        <setting name=;logImpl; value=;LOG4J2;/>
    </settings>
 
    <!-- 别名 -->
    <typeAliases>
        <!--<typeAlias type=;com.xx.model.Book; alias=;Book;/>-->
    </typeAliases>
 
    <plugins>
        <plugin interceptor=;com.github.pagehelper.PageInterceptor;>
        </plugin>
    </plugins>
 
    <!-- 配置mybatis运行环境 -->
    <environments default=;development;>
        <environment id=;development;>
            <!-- type=;JDBC; 代表使用JDBC的提交和回滚来管理事务 -->
            <transactionManager type=;jdbc;/>
 
            <!-- mybatis提供了3种数据源类型;分别是;POOLED,UNPOOLED,JNDI -->
            <!-- POOLED 表示支持JDBC数据源连接池 -->
            <!-- UNPOOLED 表示不支持数据源连接池 -->
            <!-- JNDI 表示支持外部数据源连接池 -->
            <dataSource type=;POOLED;>
                <property name=;driver;
                          value=;${jdbc.driver};/>
                <property name=;url;
                          value=;${jdbc.url};/>
                <property name=;username; value=;${jdbc.username};/>
                <property name=;password; value=;${jdbc.password};/>
            </dataSource>
        </environment>
    </environments>
 
    <mappers>
        <mapper resource=;com/xx/mapper/BookMapper.xml;/>
    </mappers>
</configuration>

springmvc-servlet.xml

注;这里需修改 <context:component-scan base-package=;com.xx;/>里的目录

<?xml version=;1.0; encoding=;UTF-8;?>
<beans xmlns=;http://www.springframework.org/schema/beans;
       xmlns:xsi=;http://www.w3.org/2001/XMLSchema-instance;
       xmlns:context=;http://www.springframework.org/schema/context;
       xmlns:mvc=;http://www.springframework.org/schema/mvc; xmlns:aop=;http://www.springframework.org/schema/aop;
       xsi:schemaLocation=;http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd;>
    <!-- 通过context:component-scan元素扫描指定包下的控制器-->
    <!--1) 扫描com.javaxl.zf及子子孙孙包下的控制器(扫描范围过大;耗时)-->
    <aop:aspectj-autoproxy/>
    <context:component-scan base-package=;com.xx;/>
 
    <!--2) 此标签默认注册DefaultAnnotationHandlerMapping和AnnotationMethodHandlerAdapter -->
    <!--两个bean;这两个bean是spring MVC为;Controllers分发请求所必须的。并提供了数据绑定支持;-->
    <!--;NumberFormatannotation支持;;DateTimeFormat支持;;Valid支持;读写XML的支持;JAXB;;读写JSON的支持;Jackson;-->
    <mvc:annotation-driven></mvc:annotation-driven>
 
    <!--3) ViewResolver -->
    <bean class=;org.springframework.web.servlet.view.InternalResourceViewResolver;>
        <!-- viewClass需要在pom中引入两个包;standard.jar and jstl.jar -->
        <property name=;viewClass;
                  value=;org.springframework.web.servlet.view.JstlView;></property>
        <property name=;prefix; value=;/;/>
        <property name=;suffix; value=;.jsp;/>
    </bean>
 
    <!--4) 单独处理图片、样式、js等资源 -->
    <!--<mvc:resources location=;/css/; mapping=;/css/**;/>-->
    <!--<mvc:resources location=;/images/; mapping=;/images/**;/>-->
    <!--<mvc:resources location=;/js/; mapping=;/js/**;/>-->
 
    <!--支持json数据返回的适配器-->
    <bean class=;org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter;>
        <property name=;messageConverters;>
            <list>
                <ref bean=;mappingJackson2HttpMessageConverter;/>
            </list>
        </property>
    </bean>
    <bean id=;mappingJackson2HttpMessageConverter;
          class=;org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;>
        <!-- 处理中文乱码以及避免IE执行AJAX时;返回JSON出现下载文件-->
        <property name=;supportedMediaTypes;>
            <list>
                <value>text/html;charset=UTF-8</value>
                <value>text/json;charset=UTF-8</value>
                <value>application/json;charset=UTF-8</value>
            </list>
        </property>
    </bean>
</beans>

web.xml

注;这里需要修改CorsFilter过滤器工具类的路径

<web-app xmlns=;http://xmlns.jcp.org/xml/ns/javaee;
         xmlns:xsi=;http://www.w3.org/2001/XMLSchema-instance;
         xsi:schemaLocation=;http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd;
         version=;3.1;>
  <display-name>Archetype Created Web Application</display-name>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <!-- 读取Spring上下文的监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
 
  <!-- Spring MVC servlet -->
  <servlet>
    <servlet-name>SpringMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--此参数可以不配置;默认值为;/WEB-INF/springmvc-servlet.xml-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>/WEB-INF/springmvc-servlet.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
    <!--web.xml 3.0的新特性;是否支持异步-->
    <async-supported>true</async-supported>
  </servlet>
  <servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
 
  <!-- 解决cors跨域问题过滤器 -->
  <filter>
    <filter-name>corsFilter</filter-name>
    <filter-class>com.xx.util.CorsFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>corsFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
 
  <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>
      org.springframework.web.filter.CharacterEncodingFilter
    </filter-class>
    <async-supported>true</async-supported>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

2.2 添加工具类

简单搭建一个前后台分离的增删改查

CorsFilter
package com.xx.util;
 
import java.io.IOException;
 
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
/**
 * 配置tomcat允许跨域访问
 * 
 * ;author Administrator
 *
 */
public class CorsFilter implements Filter {
 
	;Override
	public void init(FilterConfig filterConfig) throws ServletException {
	}
 
	// ;Override
	// public void doFilter(ServletRequest servletRequest, ServletResponse
	// servletResponse, FilterChain filterChain)
	// throws IOException, ServletException {
	// HttpServletResponse httpResponse = (HttpServletResponse) servletResponse;
	//
	// // Access-Control-Allow-Origin就是我们需要设置的域名
	// // Access-Control-Allow-Headers跨域允许包含的头。
	// // Access-Control-Allow-Methods是允许的请求方式
	// httpResponse.addHeader(;Access-Control-Allow-Origin;, ;*;);// *,任何域名
	// httpResponse.setHeader(;Access-Control-Allow-Methods;, ;POST, GET, PUT,
	// DELETE;);
	// // httpResponse.setHeader(;Access-Control-Allow-Headers;, ;Origin,
	// // X-Requested-With, Content-Type, Accept;);
	//
	// // 允许请求头Token
	// httpResponse.setHeader(;Access-Control-Allow-Headers;,
	// ;Origin,X-Requested-With, Content-Type, Accept, Token;);
	// HttpServletRequest req = (HttpServletRequest) servletRequest;
	// System.out.println(;Token=; ; req.getHeader(;Token;));
	// if(;OPTIONS;.equals(req.getMethod())) {
	// return;
	// }
	//
	//
	// filterChain.doFilter(servletRequest, servletResponse);
	// }
 
	;Override
	public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
			throws IOException, ServletException {
		HttpServletResponse resp = (HttpServletResponse) servletResponse;
		HttpServletRequest req = (HttpServletRequest) servletRequest;
 
		// Access-Control-Allow-Origin就是我们需要设置的域名
		// Access-Control-Allow-Headers跨域允许包含的头。
		// Access-Control-Allow-Methods是允许的请求方式
		resp.setHeader(;Access-Control-Allow-Origin;, ;*;);// *,任何域名
		resp.setHeader(;Access-Control-Allow-Methods;, ;POST, GET, PUT, DELETE;);
		// resp.setHeader(;Access-Control-Allow-Headers;, ;Origin,X-Requested-With,
		// Content-Type, Accept;);
		// 允许客户端;发一个新的请求头jwt
		resp.setHeader(;Access-Control-Allow-Headers;, ;Origin,X-Requested-With, Content-Type, Accept, jwt;);
 
		// 允许客户端;处理一个新的响应头jwt
		resp.setHeader(;Access-Control-Expose-Headers;, ;jwt;);
		// String sss = resp.getHeader(;Access-Control-Expose-Headers;);
		// System.out.println(;sss=; ; sss);
 
		// 允许请求头Token
		// httpResponse.setHeader(;Access-Control-Allow-Headers;,;Origin,X-Requested-With,
		// Content-Type, Accept, Token;);
		// System.out.println(;Token=; ; req.getHeader(;Token;));
 
		if (;OPTIONS;.equals(req.getMethod())) {// axios的ajax会发两次请求;第一次提交方式为;option;直接返回即可
			return;
		}
		filterChain.doFilter(servletRequest, servletResponse);
	}
 
	;Override
	public void destroy() {
 
	}
}
JsonData
package com.xx.util;
 
import java.io.Serializable;
import java.util.HashMap;
 
/**
 * 服务器返回给客户端的JSON格式的数据
 *
 */
public class JsonData extends HashMap<String, Object> implements Serializable {
 
	private static final long serialVersionUID = -8855960778711040221L;
	private int code;
	private String msg;
	private Object result;
	
	public int getCode() {
		return code;
	}
 
	public void setCode(int code) {
		this.code = code;
	}
 
	public String getMsg() {
		return msg;
	}
 
	public void setMsg(String msg) {
		this.msg = msg;
	}
 
	public Object getResult() {
		return result;
	}
 
	public void setResult(Object result) {
		this.result = result;
	}
 
	public JsonData(int code, String msg, Object result) {
		super();
		this.put(;code;, code);
		this.put(;msg;, msg);
		this.put(;result;, result);
	}
 
	public JsonData() {
		super();
	}
 
}
PageBean
package com.xx.util;
 
import javax.servlet.http.HttpServletRequest;
import java.util.HashMap;
import java.util.Map;
 
/**
 * 分页工具类
 *
 */
public class PageBean {
 
	private int page = 1;// 页码
 
	private int rows = 10;// 页大小
 
	private int total = 0;// 总记录数
 
	private boolean pagination = true;// 是否分页
	
	private String url; //保存上一次请求的URL
	
	private Map<String,String[]> paramMap = new HashMap<>();// 保存上一次请求的参数
	
	/**
	 * 初始化pagebean的;保存上一次请求的重要参数
	 * ;param req
	 */
	public void setRequest(HttpServletRequest req) {
//		1.1	需要保存上一次请求的URL
		this.setUrl(req.getRequestURL().toString());
//		1.2	需要保存上一次请求的参数	bname、price
		this.setParamMap(req.getParameterMap());
//		1.3	需要保存上一次请求的分页设置	pagination
		this.setPagination(req.getParameter(;pagination;));
//		1.4	需要保存上一次请求的展示条目数
		this.setRows(req.getParameter(;rows;));
//		1.5  初始化请求的页码	page
		this.setPage(req.getParameter(;page;));
	}
	
	public void setPage(String page) {
		if(StringUtils.isNotBlank(page))
			this.setPage(Integer.valueOf(page));
	}
 
	public void setRows(String rows) {
		if(StringUtils.isNotBlank(rows))
			this.setRows(Integer.valueOf(rows));
	}
 
	public void setPagination(String pagination) {
//		只有在前台jsp填写了pagination=false;才代表不分页
		if(StringUtils.isNotBlank(pagination))
			this.setPagination(!;false;.equals(pagination));
	}
 
 
	public String getUrl() {
		return url;
	}
 
	public void setUrl(String url) {
		this.url = url;
	}
 
	public Map<String, String[]> getParamMap() {
		return paramMap;
	}
 
	public void setParamMap(Map<String, String[]> paramMap) {
		this.paramMap = paramMap;
	}
 
 
 
	public PageBean() {
		super();
	}
 
	public int getPage() {
		return page;
	}
 
	public void setPage(int page) {
		this.page = page;
	}
 
	public int getRows() {
		return rows;
	}
 
	public void setRows(int rows) {
		this.rows = rows;
	}
 
	public int getTotal() {
		return total;
	}
 
	public void setTotal(int total) {
		this.total = total;
	}
 
	public void setTotal(String total) {
		this.total = Integer.parseInt(total);
	}
 
	public boolean isPagination() {
		return pagination;
	}
 
	public void setPagination(boolean pagination) {
		this.pagination = pagination;
	}
 
	/**
	 * 获得起始记录的下标
	 * 
	 * ;return
	 */
	public int getStartIndex() {
		return (this.page - 1) * this.rows;
	}
	
	/**
	 * 最大页
	 * ;return
	 */
	public int maxPage() {
//		total % rows == 0 ? total / rows : total / rows ;1
		return this.total % this.rows == 0 ? this.total / this.rows : this.total / this.rows ; 1;
	}
	
	/**
	 * 下一页
	 * ;return
	 */
	public int nextPage() {
//		如果当前页小于最大页;那就下一页为当前页;1;如果不小于;说明当前页就是最大页;那就无需;1
		return this.page < this.maxPage() ? this.page ; 1 : this.page;
	}
	
	/**
	 * 上一页
	 * ;return
	 */
	public int previousPage() {
		return this.page > 1 ? this.page - 1 : this.page;
	}
 
	;Override
	public String toString() {
		return ;PageBean [page=; ; page ; ;, rows=; ; rows ; ;, total=; ; total ; ;, pagination=; ; pagination ; ;];;
	}
 
}
ResponseUtil
package com.xx.util;
 
import java.io.PrintWriter;
 
import javax.servlet.http.HttpServletResponse;
 
public class ResponseUtil {
 
	public static void write(HttpServletResponse response,Object o)throws Exception{
		response.setContentType(;text/html;charset=utf-8;);
		PrintWriter out=response.getWriter();
		out.println(o.toString());
		out.flush();
		out.close();
	}
}
SessionUtil
package com.xx.util;
 
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
 
/**
 * ;author zsx
 * ;site 155954····
 * ;company 交换余生
 * ;create 2022--08--26  16:53
 */
 
public class SessionUtil {
    private static SqlSessionFactory sessionFactory;
    private static ThreadLocal<SqlSession> threadLocal = new ThreadLocal<SqlSession>();
    static {
        sessionFactory = new SqlSessionFactoryBuilder().build(SessionUtil.class.getResourceAsStream(;/mybatis.cfg.xml;));
    }
 
    public static SqlSession openSession() {
        SqlSession session = threadLocal.get();
        if (null == session) {
            session = sessionFactory.openSession();
            threadLocal.set(session);
        }
        return session;
    }
 
    public static void main(String[] args) {
        SqlSession session = openSession();
        System.out.println(session.getConnection());
        session.close();
//        System.out.println(session.getConnection());
    }
}
StringUtils
package com.xx.util;
 
public class StringUtils {
	// 私有的构造方法;保护此类不能在外部实例化
	private StringUtils() {
	}
 
	/**
	 * 如果字符串等于null或去空格后等于;;;则返回true;否则返回false
	 * 
	 * ;param
	 * ;return
	 */
	public static boolean isBlank(String s) {
		boolean b = false;
		if (null == s || s.trim().equals(;;)) {
			b = true;
		}
		return b;
	}
	
	/**
	 * 如果字符串不等于null或去空格后不等于;;;则返回true;否则返回false
	 * 
	 * ;param s
	 * ;return
	 */
	public static boolean isNotBlank(String s) {
		return !isBlank(s);
	}
 
}

三、逆向生成

1.设置逆向生成指令

简单搭建一个前后台分离的增删改查

上

简单搭建一个前后台分离的增删改查

上

逆向生成的指令

mybatis-generator:generate -e

2.执行指令;逆向生成

在generatorConfig.xml里填写需逆向生成的实体类

注;前提是数据库得有这张表

上

<table schema=;; tableName=;t_mvc_book; domainObjectName=;Book;
               enableCountByExample=;false; enableDeleteByExample=;false;
               enableSelectByExample=;false; enableUpdateByExample=;false;>
        </table>

数据库表结构 

上

执行逆向生成指令

简单搭建一个前后台分离的增删改查

 执行完毕后目录里会有以下几个类

上

3.开发代码

简单搭建一个前后台分离的增删改查

3.1 在BookMapper.xml里添加方法

<select id=;selecBookPage; resultType=;java.util.Map; parameterType=;java.util.Map; >
    select * from t_mvc_book where bname like concat(%,#{bname},%)
  </select>

 3.2 在 BookMapper 里添加对应的方法

 List<Map> selecBookPage(Map map);

  3.3 创建biz

package com.xx.biz;
 
import com.xx.model.Book;
import com.xx.util.PageBean;
 
import java.util.List;
import java.util.Map;
 
/**
 * ;author xx
 * ;site 155954····
 * ;company 交换余生
 * ;create 2022--09--20  16:48
 */
public interface BookBiz {
    /**
     * 删除
     * ;param bid
     * ;return
     */
    int deleteByPrimaryKey(Integer bid);
 
    /**
     * 增加
     * ;param record
     * ;return
     */
    int insert(Book record);
 
    /**
     * 查询
     * ;param map 
     * ;param pageBean  用于分页
     * ;return
     */
    List<Map> selecBookPage(Map map, PageBean pageBean);
 
    /**
     * 修改
     * ;param record
     * ;return
     */
    int updateByPrimaryKeySelective(Book record);
}

3.4 实现biz中的方法

BookBizImpl
package com.xx.biz.impl;
 
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.xx.biz.BookBiz;
import com.xx.mapper.BookMapper;
import com.xx.model.Book;
import com.xx.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
import java.util.List;
import java.util.Map;
 
/**
 * ;author xx
 * ;site 155954····
 * ;company 交换余生
 * ;create 2022--09--20  16:50
 */
;Service
public class BookBizImpl implements BookBiz {
    ;Autowired
    private BookMapper bookMapper;
    ;Override
    public int deleteByPrimaryKey(Integer bid) {
        return bookMapper.deleteByPrimaryKey(bid);
    }
 
    ;Override
    public int insert(Book record) {
        return bookMapper.insert(record);
    }
 
    ;Override
    public List<Map> selecBookPage(Map map, PageBean pageBean) {
        if(pageBean!=null&&pageBean.isPagination()){
            PageHelper.startPage(pageBean.getPage(),pageBean.getRows());
        }
        List<Map> maps = bookMapper.selecBookPage(map);
        if(pageBean!=null&&pageBean.isPagination()){
            PageInfo info = new PageInfo(maps);
            pageBean.setTotal(info.getTotal();;;);
        }
        return maps;
    }
 
    ;Override
    public int updateByPrimaryKeySelective(Book record) {
        return bookMapper.updateByPrimaryKeySelective(record);
    }
}

4.5 测试方法

注;只测试查询方法

BookBizImplTest
package com.xx.biz.impl;
 
import com.fasterxml.jackson.databind.ObjectMapper;
import com.xx.biz.BookBiz;
import com.xx.util.JsonData;
import com.xx.util.PageBean;
import com.xx.util.ResponseUtil;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
import java.util.HashMap;
import java.util.List;
import java.util.Map;
 
/**
 * ;author xx
 * ;site 155954····
 * ;company 交换余生
 * ;create 2022--09--20  17:11
 */
;RunWith(SpringJUnit4ClassRunner.class)
;ContextConfiguration(locations={;classpath:applicationContext-mybatis.xml;})
public class BookBizImplTest {
    ;Autowired
    private BookBiz bookBiz;
    ;Test
    public void selectlistPage() {
        PageBean pageBean = new PageBean();
        pageBean.setTotal(10);
        ObjectMapper om = new ObjectMapper();
        Map map = new HashMap();
        String bname = ;;;
        map.put(;bname;,bname);
        List<Map> list = bookBiz.selecBookPage(map,pageBean);
        for (Map book : list) {
            System.out.println(book);
        }
    }
}

测试结果;

简单搭建一个前后台分离的增删改查

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