工具类——mybatis-generator自动生成mapper等代码

新建maven项目

1、pom.xml 加入以下代码

<build>
        <plugins>
            <plugin>
                <!--Mybatis-generator插件,用于自动生成Mapper和POJO-->
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <!--配置文件的位置-->
                    <configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
                <executions>
                    <execution>
                        <id>Generate MyBatis Artifacts</id>
                        <goals>
                            <goal>generate</goal>
                        </goals>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-core</artifactId>
                        <version>1.3.2</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>

2、resources文件夹下新建generatorConfig.xml(名字可随意取)

<?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>
<!-- location填本地mysql-connector-java-5.1.40.jar的路径 -->
    <classPathEntry
            location="D:/software/maven3.3/repository/mysql/mysql-connector-java/5.1.40/mysql-connector-java-5.1.40.jar" />
    <context id="context1" targetRuntime="MyBatis3">
        <!-- 去注释 -->
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
            <property name="suppressDate" value="true" />
        </commentGenerator>

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/test" userId="root"
                        password="123456" />

        <!-- 实体层 -->
        <javaModelGenerator targetPackage="com.zhao.entity"
                            targetProject="src/main/java" />

        <!-- DAO层 -->
        <sqlMapGenerator targetPackage="com.zhao.mapper"
                         targetProject="src/main/java" />

        <!-- Mappering.xml -->
        <javaClientGenerator targetPackage="com.zhao.mapper"
                             targetProject="src/main/java" type="XMLMAPPER" />

         <!-- schema填数据库名 tableName填需要生成代码的表名 若要一次性多张表就将下面的代码多复制，修改表名即可-->
        <table schema="database_name" tableName="table_name"
               enableCountByExample="false" enableUpdateByExample="false"
               enableDeleteByExample="false" enableSelectByExample="false"
               selectByExampleQueryId="false" />

    </context>
</generatorConfiguration>

在idea中生成代码的操作

1、下载插件idea-mybatis-generator

2、在idea右边点击maven，找到新建的maven项目——>Plugins——>mybatis-generator，双击即可生成代码

在MyEclipse中生成代码的操作

1、点击菜单栏Help–>Install from Site，在Work with输入

mybatis - https://dl.bintray.com/mybatis/mybatis-generator

2、生成代码（图片为MyEclipse 2017，其他版本只要右键点击那只黑鸟即可）