mybatis-generator 代码自动生成工具（maven方式）

怼烎@ 2022-09-30 15:52 240阅读 0赞

#     #

由于MyBatis属于一种半自动的ORM框架，所以主要的工作将是书写Mapping映射文件，但是由于手写映射文件很容易出错，mybatis-gennerator插件帮我们自动生成mybatis所需要的dao、bean、mapper xml文件。

这里主要通过eclipse工具，来讲解实现;

1、建表语句

CREATE TABLE `user` (
      `id` int(11) NOT NULL AUTO_INCREMENT,
      `name` varchar(100) DEFAULT NULL,
      PRIMARY KEY (`id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

2、新建测试工程

![633261-20160523230103272-485935803.jpg][]

选择maven工程

![633261-20160523230140475-1410724886.jpg][]

选择create a simple project就行

![633261-20160523230256225-2060365353.jpg][]

点击finish，测试项目就建完了

3、在maven配置文件pom.xml中添加依赖

![复制代码][copycode.gif]

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>com.test</groupId>
      <artifactId>mybatis_generator</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      <name>mybatis_generator</name>
      
      <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        </properties>
    
        <dependencies>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.35</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-core</artifactId>
                <version>1.3.2</version>
            </dependency>
        </dependencies>
        <build>
            <pluginManagement>
                <plugins>
                    <plugin>
                        <groupId>org.apache.maven.plugins</groupId>
                        <artifactId>maven-compiler-plugin</artifactId>
                        <configuration>
                            <source>1.7</source>
                            <target>1.7</target>
                        </configuration>
                        <version>3.3</version>
                    </plugin>
                    <plugin>
                        <groupId>org.mybatis.generator</groupId>
                        <artifactId>mybatis-generator-maven-plugin</artifactId>
                        <version>1.3.2</version>
                        <dependencies>
                            <dependency>
                                <groupId>mysql</groupId>
                                <artifactId>mysql-connector-java</artifactId>
                                <version>5.1.35</version>
                            </dependency>
                        </dependencies>
                        <configuration>
                             
                             <configurationFile>${basedir}/src/main/resources/generatorConfig.xml</configurationFile> 
                            <overwrite>true</overwrite>
                        </configuration>
                    </plugin>
                </plugins>
            </pluginManagement>
        </build>
    </project>

![复制代码][copycode.gif]

4、在resources下，创建一个generatorConfig.xml配置文件

![复制代码][copycode.gif]

<?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>
        <context id="test" targetRuntime="MyBatis3">
            <plugin type="org.mybatis.generator.plugins.EqualsHashCodePlugin"></plugin>  
            <plugin type="org.mybatis.generator.plugins.SerializablePlugin"></plugin> 
             <plugin type="org.mybatis.generator.plugins.ToStringPlugin"></plugin> 
            <commentGenerator>
                
                
                <property name="suppressDate" value="true" />
                
                <property name="suppressAllComments" value="false" />
            </commentGenerator>
            
            <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                connectionURL="jdbc:mysql://localhost/mytest" userId="root" password="123456">
                </jdbcConnection>
            <javaTypeResolver>
                
                <property name="forceBigDecimals" value="false" />
            </javaTypeResolver>
            
            <javaModelGenerator targetPackage="com.test.pojo"
                targetProject="target">
                <property name="enableSubPackages" value="true" />
                <property name="trimStrings" value="true" />
            </javaModelGenerator>
            
            <sqlMapGenerator targetPackage="com.test.mapping"
                targetProject="target">
                <property name="enableSubPackages" value="true" />
            </sqlMapGenerator>
            
            <javaClientGenerator type="XMLMAPPER"
                targetPackage="com.test.dao" implementationPackage="com.test.dao.impl"  targetProject="target">
                <property name="enableSubPackages" value="true" />
            </javaClientGenerator>
            
            
            <table tableName="user" domainObjectName="user"
                enableCountByExample="false" enableUpdateByExample="false"
                enableDeleteByExample="false" enableSelectByExample="false"
                selectByExampleQueryId="false"></table>
        </context>
    </generatorConfiguration>

![复制代码][copycode.gif]

5、下载maven依赖包，update project

![633261-20160523230920819-976366585.jpg][]

这个要稍微等一下，需要时间~~~

6、执行mabatis-generator:generate命令，生成文件

![633261-20160523231107913-235154370.jpg][]

![633261-20160523231134163-1405029852.jpg][]

在控制台 显示 build success，说明已经成功了：

![633261-20160523231212991-1392027351.jpg][]

7、在项目上F5刷新，target目录下呢就会出现对应的文件

![633261-20160523231341209-713226656.jpg][]

这是想要的文件自动生成了。

github项目地址：[https://github.com/JsonShare/mybatis\_generator.git][https_github.com_JsonShare_mybatis_generator.git]

[633261-20160523230103272-485935803.jpg]: /images/20220705/d9324daf6e9a44e0b6a0330ab4a27af8.png
[633261-20160523230140475-1410724886.jpg]: /images/20220705/530bf79c9dc74d6b8524657e901f5165.png
[633261-20160523230256225-2060365353.jpg]: /images/20220705/1b915c76b87848f8b8e8c4d7b6095146.png
[copycode.gif]: /images/20220705/aa8a5a1aa9114435831806d429a22a7e.png
[633261-20160523230920819-976366585.jpg]: /images/20220705/085582a970ab420dacbb7babaa9cb4c6.png
[633261-20160523231107913-235154370.jpg]: /images/20220705/b300db890d5f40c59eba6654cafe7dda.png
[633261-20160523231134163-1405029852.jpg]: /images/20220705/c47e64afa812419daf99e246858bb10a.png
[633261-20160523231212991-1392027351.jpg]: /images/20220705/826166770fb145e3ba7e6733859559dc.png
[633261-20160523231341209-713226656.jpg]: /images/20220705/4551a6b8e6a141c5af74a5078e1bdfc3.png
[https_github.com_JsonShare_mybatis_generator.git]: https://github.com/JsonShare/mybatis_generator.git