mybatis mybatis-generator 代码自动生成工具
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一、简介
mybatis generator是很好用的mybatis自动代码生成工具。最近公司使用maven和mybatis开发项目，手动写入一个个实体类和mapper还有xml配置文件感觉会很麻烦，使用mybatis generator只需要简单的配置就能完成我们的工作，这里简述一下开发步骤。
二、开发流程
2.1 创建maven项目
我们选择开发工具创建maven项目，我这里使用myeclipse开发，建议使用eclipse或者idea开发。
2.2 在pom配置文件中加入依赖包
<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>mybatis-generator-base</groupId> <artifactId>mybatis-generator-base</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <name/> <description/> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.1</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.annotation</artifactId> <version>3.0.1</version> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.ejb</artifactId> <version>3.0.1</version> </dependency> <dependency> <groupId>org.jboss.weld</groupId> <artifactId>weld-osgi-bundle</artifactId> <version>1.0.1-SP3</version> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.servlet</artifactId> <version>3.0.1</version> </dependency> <!--测试框架 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!-- Mysql --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.2.7</version> </dependency> <!-- Mysql 依赖 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.6</version> </dependency> <!--生成代码插件--> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.2</version> <type>jar</type> </dependency> </dependencies> <build> <plugins> <plugin> <artifactId>maven-war-plugin</artifactId> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.6</source> <target>1.6</target> </configuration> </plugin> </plugins> </build></project>- 1
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2.3 新建生成代码的配置文件mybatis-generator-config.xml
将配置文件配置在合适的位置就可以，但是要访问的到，我这里放置在resources文件下。
<?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="prod"> <!-- RowBounds pagination --> <plugin type="org.mybatis.generator.plugins.RowBoundsPlugin" /> <plugin type="org.mybatis.generator.plugins.CaseInsensitiveLikePlugin" /> <plugin type="org.mybatis.generator.plugins.SerializablePlugin" /> <commentGenerator> <property name="suppressDate" value="true" /> <property name="suppressAllComments" value="true" /> </commentGenerator> <!-- jdbc连接 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1:3306/generator" userId="root" password="123456" /> <javaModelGenerator targetPackage="com.mybatis.entity" targetProject="src/main/java"> <!-- 是否针对string类型的字段在set的时候进行trim调用 --> <property name="trimStrings" value="true" /> </javaModelGenerator> <sqlMapGenerator targetPackage="mappers" targetProject="src/main/java" /> <javaClientGenerator targetPackage="com.mybatis.mapper" targetProject="src/main/java" type="XMLMAPPER" /> <table tableName="wx_ranking_flow" domainObjectName="WxRankingFlow"> </table> </context></generatorConfiguration>- 1
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（1）在javaModelGenerator标签下配置你需要生成的数据库实体的地址
（2）在sqlMapGenerator标签下配置mysql的xml配置文件
（3）在javaClientGenerator标签下配置mapper方法
（4）在table标签下配置数据库的表面和生成实体的表名
2.4 新建批处理类main方法
package com.mybatis.test;import org.mybatis.generator.api.ShellRunner;public class App { public static void main(String[] args) { args = new String[] { "-configfile", "src\\main\\resources\\mybatis-generator-config.xml", "-overwrite" }; ShellRunner.main(args); }}- 1
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这里要处理的就是我们的mybatis-generator-config.xml配置文件，路径一定要对应我们的存放路径。
执行main方法就可以生成对应的实体和xml配置文件了。 
我们会发现我们生成了两个实体对象，一个是数据库映射对象，一个是Example对象。Example对象就是为了方便我们执行sql操作的类，可以使用Example类进行数据库的条件查询。同时mybatis-generator还帮助我们生成了sql的CRUD等操作。
WxRankingFlowMapper接口
package com.mybatis.mapper;import java.util.List;import com.mybatis.entity.WxRankingFlow;import com.mybatis.entity.WxRankingFlowExample;import org.apache.ibatis.annotations.Param;import org.apache.ibatis.session.RowBounds;public interface WxRankingFlowMapper { int countByExample(WxRankingFlowExample example); int deleteByExample(WxRankingFlowExample example); int deleteByPrimaryKey(String rId); int insert(WxRankingFlow record); int insertSelective(WxRankingFlow record); List<WxRankingFlow> selectByExampleWithRowbounds(WxRankingFlowExample example, RowBounds rowBounds); List<WxRankingFlow> selectByExample(WxRankingFlowExample example); WxRankingFlow selectByPrimaryKey(String rId); int updateByExampleSelective(@Param("record") WxRankingFlow record, @Param("example") WxRankingFlowExample example); int updateByExample(@Param("record") WxRankingFlow record, @Param("example") WxRankingFlowExample example); int updateByPrimaryKeySelective(WxRankingFlow record); int updateByPrimaryKey(WxRankingFlow record);}- 1
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WxRankingFlowMapper.xml配置文件（这个配置文件就是我们对应实体的，命名是数据库名）
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" ><mapper namespace="com.mybatis.mapper.WxRankingFlowMapper" > <resultMap id="BaseResultMap" type="com.mybatis.entity.WxRankingFlow" > <id column="r_id" property="rId" jdbcType="VARCHAR" /> <result column="r_gift_date" property="rGiftDate" jdbcType="VARCHAR" /> <result column="r_sid" property="rSid" jdbcType="VARCHAR" /> <result column="r_card_no" property="rCardNo" jdbcType="VARCHAR" /> <result column="r_card_name" property="rCardName" jdbcType="VARCHAR" /> <result column="r_re_openid" property="rReOpenid" jdbcType="VARCHAR" /> <result column="r_number" property="rNumber" jdbcType="INTEGER" /> <result column="r_chain_code" property="rChainCode" jdbcType="VARCHAR" /> <result column="r_chain_id" property="rChainId" jdbcType="VARCHAR" /> <result column="r_chain_name" property="rChainName" jdbcType="VARCHAR" /> <result column="r_total_amount" property="rTotalAmount" jdbcType="INTEGER" /> <result column="r_total_count" property="rTotalCount" jdbcType="INTEGER" /> <result column="r_praise_count" property="rPraiseCount" jdbcType="INTEGER" /> <result column="r_create_time" property="rCreateTime" jdbcType="TIMESTAMP" /> <result column="r_update_time" property="rUpdateTime" jdbcType="TIMESTAMP" /> </resultMap> <sql id="Example_Where_Clause" > <where > <foreach collection="oredCriteria" item="criteria" separator="or" > <if test="criteria.valid" > <trim prefix="(" suffix=")" prefixOverrides="and" > <foreach collection="criteria.criteria" item="criterion" > <choose > <when test="criterion.noValue" > and ${criterion.condition} </when> <when test="criterion.singleValue" > and ${criterion.condition} #{criterion.value} </when> <when test="criterion.betweenValue" > and ${criterion.condition} #{criterion.value} and #{criterion.secondValue} </when> <when test="criterion.listValue" > and ${criterion.condition} <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," > #{listItem} </foreach> </when> </choose> </foreach> </trim> </if> </foreach> </where> </sql> <sql id="Update_By_Example_Where_Clause" > <where > <foreach collection="example.oredCriteria" item="criteria" separator="or" > <if test="criteria.valid" > <trim prefix="(" suffix=")" prefixOverrides="and" > <foreach collection="criteria.criteria" item="criterion" > <choose > <when test="criterion.noValue" > and ${criterion.condition} </when> <when test="criterion.singleValue" > and ${criterion.condition} #{criterion.value} </when> <when test="criterion.betweenValue" > and ${criterion.condition} #{criterion.value} and #{criterion.secondValue} </when> <when test="criterion.listValue" > and ${criterion.condition} <foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," > #{listItem} </foreach> </when> </choose> </foreach> </trim> </if> </foreach> </where> </sql> <sql id="Base_Column_List" > r_id, r_gift_date, r_sid, r_card_no, r_card_name, r_re_openid, r_number, r_chain_code, r_chain_id, r_chain_name, r_total_amount, r_total_count, r_praise_count, r_create_time, r_update_time </sql> <select id="selectByExample" resultMap="BaseResultMap" parameterType="com.mybatis.entity.WxRankingFlowExample" > select <if test="distinct" > distinct </if> <include refid="Base_Column_List" /> from wx_ranking_flow <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> <if test="orderByClause != null" > order by ${orderByClause} </if> </select> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.String" > select <include refid="Base_Column_List" /> from wx_ranking_flow where r_id = #{rId,jdbcType=VARCHAR} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.String" > delete from wx_ranking_flow where r_id = #{rId,jdbcType=VARCHAR} </delete> <delete id="deleteByExample" parameterType="com.mybatis.entity.WxRankingFlowExample" > delete from wx_ranking_flow <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> </delete> <insert id="insert" parameterType="com.mybatis.entity.WxRankingFlow" > insert into wx_ranking_flow (r_id, r_gift_date, r_sid, r_card_no, r_card_name, r_re_openid, r_number, r_chain_code, r_chain_id, r_chain_name, r_total_amount, r_total_count, r_praise_count, r_create_time, r_update_time ) values (#{rId,jdbcType=VARCHAR}, #{rGiftDate,jdbcType=VARCHAR}, #{rSid,jdbcType=VARCHAR}, #{rCardNo,jdbcType=VARCHAR}, #{rCardName,jdbcType=VARCHAR}, #{rReOpenid,jdbcType=VARCHAR}, #{rNumber,jdbcType=INTEGER}, #{rChainCode,jdbcType=VARCHAR}, #{rChainId,jdbcType=VARCHAR}, #{rChainName,jdbcType=VARCHAR}, #{rTotalAmount,jdbcType=INTEGER}, #{rTotalCount,jdbcType=INTEGER}, #{rPraiseCount,jdbcType=INTEGER}, #{rCreateTime,jdbcType=TIMESTAMP}, #{rUpdateTime,jdbcType=TIMESTAMP} ) </insert> <insert id="insertSelective" parameterType="com.mybatis.entity.WxRankingFlow" > insert into wx_ranking_flow <trim prefix="(" suffix=")" suffixOverrides="," > <if test="rId != null" > r_id, </if> <if test="rGiftDate != null" > r_gift_date, </if> <if test="rSid != null" > r_sid, </if> <if test="rCardNo != null" > r_card_no, </if> <if test="rCardName != null" > r_card_name, </if> <if test="rReOpenid != null" > r_re_openid, </if> <if test="rNumber != null" > r_number, </if> <if test="rChainCode != null" > r_chain_code, </if> <if test="rChainId != null" > r_chain_id, </if> <if test="rChainName != null" > r_chain_name, </if> <if test="rTotalAmount != null" > r_total_amount, </if> <if test="rTotalCount != null" > r_total_count, </if> <if test="rPraiseCount != null" > r_praise_count, </if> <if test="rCreateTime != null" > r_create_time, </if> <if test="rUpdateTime != null" > r_update_time, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="rId != null" > #{rId,jdbcType=VARCHAR}, </if> <if test="rGiftDate != null" > #{rGiftDate,jdbcType=VARCHAR}, </if> <if test="rSid != null" > #{rSid,jdbcType=VARCHAR}, </if> <if test="rCardNo != null" > #{rCardNo,jdbcType=VARCHAR}, </if> <if test="rCardName != null" > #{rCardName,jdbcType=VARCHAR}, </if> <if test="rReOpenid != null" > #{rReOpenid,jdbcType=VARCHAR}, </if> <if test="rNumber != null" > #{rNumber,jdbcType=INTEGER}, </if> <if test="rChainCode != null" > #{rChainCode,jdbcType=VARCHAR}, </if> <if test="rChainId != null" > #{rChainId,jdbcType=VARCHAR}, </if> <if test="rChainName != null" > #{rChainName,jdbcType=VARCHAR}, </if> <if test="rTotalAmount != null" > #{rTotalAmount,jdbcType=INTEGER}, </if> <if test="rTotalCount != null" > #{rTotalCount,jdbcType=INTEGER}, </if> <if test="rPraiseCount != null" > #{rPraiseCount,jdbcType=INTEGER}, </if> <if test="rCreateTime != null" > #{rCreateTime,jdbcType=TIMESTAMP}, </if> <if test="rUpdateTime != null" > #{rUpdateTime,jdbcType=TIMESTAMP}, </if> </trim> </insert> <select id="countByExample" parameterType="com.mybatis.entity.WxRankingFlowExample" resultType="java.lang.Integer" > select count(*) from wx_ranking_flow <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> </select> <update id="updateByExampleSelective" parameterType="map" > update wx_ranking_flow <set > <if test="record.rId != null" > r_id = #{record.rId,jdbcType=VARCHAR}, </if> <if test="record.rGiftDate != null" > r_gift_date = #{record.rGiftDate,jdbcType=VARCHAR}, </if> <if test="record.rSid != null" > r_sid = #{record.rSid,jdbcType=VARCHAR}, </if> <if test="record.rCardNo != null" > r_card_no = #{record.rCardNo,jdbcType=VARCHAR}, </if> <if test="record.rCardName != null" > r_card_name = #{record.rCardName,jdbcType=VARCHAR}, </if> <if test="record.rReOpenid != null" > r_re_openid = #{record.rReOpenid,jdbcType=VARCHAR}, </if> <if test="record.rNumber != null" > r_number = #{record.rNumber,jdbcType=INTEGER}, </if> <if test="record.rChainCode != null" > r_chain_code = #{record.rChainCode,jdbcType=VARCHAR}, </if> <if test="record.rChainId != null" > r_chain_id = #{record.rChainId,jdbcType=VARCHAR}, </if> <if test="record.rChainName != null" > r_chain_name = #{record.rChainName,jdbcType=VARCHAR}, </if> <if test="record.rTotalAmount != null" > r_total_amount = #{record.rTotalAmount,jdbcType=INTEGER}, </if> <if test="record.rTotalCount != null" > r_total_count = #{record.rTotalCount,jdbcType=INTEGER}, </if> <if test="record.rPraiseCount != null" > r_praise_count = #{record.rPraiseCount,jdbcType=INTEGER}, </if> <if test="record.rCreateTime != null" > r_create_time = #{record.rCreateTime,jdbcType=TIMESTAMP}, </if> <if test="record.rUpdateTime != null" > r_update_time = #{record.rUpdateTime,jdbcType=TIMESTAMP}, </if> </set> <if test="_parameter != null" > <include refid="Update_By_Example_Where_Clause" /> </if> </update> <update id="updateByExample" parameterType="map" > update wx_ranking_flow set r_id = #{record.rId,jdbcType=VARCHAR}, r_gift_date = #{record.rGiftDate,jdbcType=VARCHAR}, r_sid = #{record.rSid,jdbcType=VARCHAR}, r_card_no = #{record.rCardNo,jdbcType=VARCHAR}, r_card_name = #{record.rCardName,jdbcType=VARCHAR}, r_re_openid = #{record.rReOpenid,jdbcType=VARCHAR}, r_number = #{record.rNumber,jdbcType=INTEGER}, r_chain_code = #{record.rChainCode,jdbcType=VARCHAR}, r_chain_id = #{record.rChainId,jdbcType=VARCHAR}, r_chain_name = #{record.rChainName,jdbcType=VARCHAR}, r_total_amount = #{record.rTotalAmount,jdbcType=INTEGER}, r_total_count = #{record.rTotalCount,jdbcType=INTEGER}, r_praise_count = #{record.rPraiseCount,jdbcType=INTEGER}, r_create_time = #{record.rCreateTime,jdbcType=TIMESTAMP}, r_update_time = #{record.rUpdateTime,jdbcType=TIMESTAMP} <if test="_parameter != null" > <include refid="Update_By_Example_Where_Clause" /> </if> </update> <update id="updateByPrimaryKeySelective" parameterType="com.mybatis.entity.WxRankingFlow" > update wx_ranking_flow <set > <if test="rGiftDate != null" > r_gift_date = #{rGiftDate,jdbcType=VARCHAR}, </if> <if test="rSid != null" > r_sid = #{rSid,jdbcType=VARCHAR}, </if> <if test="rCardNo != null" > r_card_no = #{rCardNo,jdbcType=VARCHAR}, </if> <if test="rCardName != null" > r_card_name = #{rCardName,jdbcType=VARCHAR}, </if> <if test="rReOpenid != null" > r_re_openid = #{rReOpenid,jdbcType=VARCHAR}, </if> <if test="rNumber != null" > r_number = #{rNumber,jdbcType=INTEGER}, </if> <if test="rChainCode != null" > r_chain_code = #{rChainCode,jdbcType=VARCHAR}, </if> <if test="rChainId != null" > r_chain_id = #{rChainId,jdbcType=VARCHAR}, </if> <if test="rChainName != null" > r_chain_name = #{rChainName,jdbcType=VARCHAR}, </if> <if test="rTotalAmount != null" > r_total_amount = #{rTotalAmount,jdbcType=INTEGER}, </if> <if test="rTotalCount != null" > r_total_count = #{rTotalCount,jdbcType=INTEGER}, </if> <if test="rPraiseCount != null" > r_praise_count = #{rPraiseCount,jdbcType=INTEGER}, </if> <if test="rCreateTime != null" > r_create_time = #{rCreateTime,jdbcType=TIMESTAMP}, </if> <if test="rUpdateTime != null" > r_update_time = #{rUpdateTime,jdbcType=TIMESTAMP}, </if> </set> where r_id = #{rId,jdbcType=VARCHAR} </update> <update id="updateByPrimaryKey" parameterType="com.mybatis.entity.WxRankingFlow" > update wx_ranking_flow set r_gift_date = #{rGiftDate,jdbcType=VARCHAR}, r_sid = #{rSid,jdbcType=VARCHAR}, r_card_no = #{rCardNo,jdbcType=VARCHAR}, r_card_name = #{rCardName,jdbcType=VARCHAR}, r_re_openid = #{rReOpenid,jdbcType=VARCHAR}, r_number = #{rNumber,jdbcType=INTEGER}, r_chain_code = #{rChainCode,jdbcType=VARCHAR}, r_chain_id = #{rChainId,jdbcType=VARCHAR}, r_chain_name = #{rChainName,jdbcType=VARCHAR}, r_total_amount = #{rTotalAmount,jdbcType=INTEGER}, r_total_count = #{rTotalCount,jdbcType=INTEGER}, r_praise_count = #{rPraiseCount,jdbcType=INTEGER}, r_create_time = #{rCreateTime,jdbcType=TIMESTAMP}, r_update_time = #{rUpdateTime,jdbcType=TIMESTAMP} where r_id = #{rId,jdbcType=VARCHAR} </update> <select resultMap="BaseResultMap" parameterType="com.mybatis.entity.WxRankingFlowExample" id="selectByExampleWithRowbounds" > select <if test="distinct" > distinct </if> <include refid="Base_Column_List" /> from wx_ranking_flow <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> <if test="orderByClause != null" > order by ${orderByClause} </if> </select></mapperMAC 系统和Windows 系统注意路径问题 。Windows是：\ MAC是：/阅读全文
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- mybatis mybatis-generator 代码自动生成工具
- mybatis mybatis-generator 代码自动生成工具
- [mybatis]-mybatis代码自动生成工具mybatis-generator
- mybatis-generator 代码自动生成工具
- mybatis-generator 代码自动生成工具
- mybatis-generator 代码自动生成工具
- mybatis-generator 代码自动生成工具
- mybatis-generator 代码自动生成工具
- mybatis-generator 代码自动生成工具
- mybatis-generator 代码自动生成工具
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- mybatis-generator 代码自动生成工具
- mybatis-generator 代码自动生成工具
- mybatis-generator 代码自动生成工具
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