1、首先，得先看看eclipse有没安装mybatis generator插件，如果有的话，请忽略这一步
eclipse在线安装mybatis generator
1、打开eclipse,找到help->Eclispe Mapketplace
2、在搜索框输入mybatis generator，然后点击go
3、找到mybatis generator对应的版本，下载后然后重启eclipse即可
2、
1.配置文件
jdbc.driverLocation=D:/repository/mysql/mysql-connector-java/5.1.47/mysql-connector-java-5.1.47.jar jdbc.driverClass=com.mysql.jdbc.Driver jdbc.connectionURL=jdbc:mysql://xxxxxx:3306/smarthome?useUnicode=true&characterEncoding=utf-8 jdbc.userId=lsc jdbc.password=lsc
2.xml
<?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>
<!--导入属性配置 -->
<properties resource="generator.properties"></properties>
<!--指定特定数据库的jdbc驱动jar包的位置 -->
<classPathEntry location="${jdbc.driverLocation}" />
<context id="default" targetRuntime="MyBatis3">
<property name="javaFileEncoding" value="UTF-8" />
<!-- 这里的type里写的是你的实现类的类全类名,注：如果不配置type属性,则会使用默认的CommentGenerator实现类DefaultCommentGenerator -->
<commentGenerator type="com.tkgm.api.common.utils.MyCommentGenerator">
<!-- 去除自动生成的注释 -->
<!-- <property name="suppressAllComments" value="true" /> -->
<!-- 是否生成注释代时间戳 -->
<property name="suppressDate" value="true" />
</commentGenerator>
<!--jdbc的数据库连接 -->
<jdbcConnection driverClass="${jdbc.driverClass}"
connectionURL="${jdbc.connectionURL}" userId="${jdbc.userId}"
password="${jdbc.password}">
</jdbcConnection>
<!-- 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>
<!-- 生成实体类地址 -->
<javaModelGenerator targetPackage="com.tkgm.api.mapper.po"
targetProject="smarthome-app/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="false" />
<!-- 是否对类CHAR类型的列的数据进行trim操作 -->
<property name="trimStrings" value="user" />
<!-- 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>
<!-- 生成mapxml文件 -->
<sqlMapGenerator targetPackage="mapper"
targetProject="smarthome-app/src/main/resources">
<property name="enableSubPackages" value="false" />
</sqlMapGenerator>
<!-- 生成mapxml对应client，也就是接口dao -->
<javaClientGenerator targetPackage="com.tkgm.api.mapper"
targetProject="smarthome-app/src/main/java" type="XMLMAPPER">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- 配置表信息 -->
<table tableName="t_area" domainObjectName="Area"
enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="false"
selectByExampleQueryId="false">
<!-- 忽略列，不生成bean 字段 -->
<!-- <ignoreColumn column="FRED" /> -->
<!-- 指定列的java数据类型 -->
<!-- <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> -->
</table>
</context>
</generatorConfiguration>
3.映射数据库中文注释
package com.tkgm.api.common.utils; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Properties; import java.util.Set; import org.mybatis.generator.api.CommentGenerator; import org.mybatis.generator.api.IntrospectedColumn; import org.mybatis.generator.api.IntrospectedTable; import org.mybatis.generator.api.dom.java.CompilationUnit; import org.mybatis.generator.api.dom.java.Field; import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType; import org.mybatis.generator.api.dom.java.InnerClass; import org.mybatis.generator.api.dom.java.InnerEnum; import org.mybatis.generator.api.dom.java.JavaElement; import org.mybatis.generator.api.dom.java.Method; import org.mybatis.generator.api.dom.java.Parameter; import org.mybatis.generator.api.dom.java.TopLevelClass; import org.mybatis.generator.api.dom.xml.XmlElement; import org.mybatis.generator.config.MergeConstants; import org.mybatis.generator.config.PropertyRegistry; /** * 自定义实现 注释生成器 CommentGenerator 接口 * @author 北北 * @date 2018年1月17日上午10:22:11 */ public class MyCommentGenerator implements CommentGenerator { private Properties properties; private Properties systemPro; private boolean suppressDate; private boolean suppressAllComments; private String nowTime; public MyCommentGenerator() { super(); properties = new Properties(); systemPro = System.getProperties(); suppressDate = false; suppressAllComments = false; nowTime = (new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")).format(new Date()); } public void addJavaFileComment(CompilationUnit compilationUnit) { if (suppressAllComments) { return; } return; } /** * Adds a suitable comment to warn users that the element was generated, and * when it was generated. */ public void addComment(XmlElement xmlElement) { return; } public void addRootComment(XmlElement rootElement) { // add no document level comments by default return; } public void addConfigurationProperties(Properties properties) { this.properties.putAll(properties); suppressDate = isTrue(properties.getProperty(PropertyRegistry.COMMENT_GENERATOR_SUPPRESS_DATE)); suppressAllComments = isTrue(properties.getProperty(PropertyRegistry.COMMENT_GENERATOR_SUPPRESS_ALL_COMMENTS)); } /** * 判断传入参数是否为true * @author 北北 * @date 2018年2月2日下午3:55:06 * @param property * @return */ private boolean isTrue(String property) { if("true".equals(property)){ return true; } return false; } /** * This method adds the custom javadoc tag for. You may do nothing if you do * not wish to include the Javadoc tag - however, if you do not include the * Javadoc tag then the Java merge capability of the eclipse plugin will * break. * * @param javaElement * the java element */ protected void addJavadocTag(JavaElement javaElement, boolean markAsDoNotDelete) { javaElement.addJavaDocLine(" *"); StringBuilder sb = new StringBuilder(); sb.append(" * "); sb.append(MergeConstants.NEW_ELEMENT_TAG); if (markAsDoNotDelete) { sb.append(" do_not_delete_during_merge"); } String s = getDateString(); if (s != null) { sb.append(' '); sb.append(s); } javaElement.addJavaDocLine(sb.toString()); } /** * This method returns a formated date string to include in the Javadoc tag * and XML comments. You may return null if you do not want the date in * these documentation elements. * * @return a string representing the current timestamp, or null */ protected String getDateString() { String result = null; if (!suppressDate) { result = nowTime; } return result; } public void addClassComment(InnerClass innerClass, IntrospectedTable introspectedTable) { if (suppressAllComments) { return; } StringBuilder sb = new StringBuilder(); innerClass.addJavaDocLine("/**"); sb.append(" * "); sb.append(introspectedTable.getFullyQualifiedTable()); sb.append(" "); sb.append(getDateString()); innerClass.addJavaDocLine(sb.toString().replace("\n", " ")); innerClass.addJavaDocLine(" */"); } public void addEnumComment(InnerEnum innerEnum, IntrospectedTable introspectedTable) { if (suppressAllComments) { return; } StringBuilder sb = new StringBuilder(); innerEnum.addJavaDocLine("/**"); sb.append(" * "); sb.append(introspectedTable.getFullyQualifiedTable()); innerEnum.addJavaDocLine(sb.toString().replace("\n", " ")); innerEnum.addJavaDocLine(" */"); } /** * 设置字段注释 */ public void addFieldComment(Field field, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn) { if (suppressAllComments) { return; } StringBuilder sb = new StringBuilder(); field.addJavaDocLine("/**"); sb.append(" * "); sb.append(introspectedColumn.getRemarks() + " " + introspectedColumn.getActualColumnName()); field.addJavaDocLine(sb.toString().replace("\n", " ")); field.addJavaDocLine(" */"); } public void addFieldComment(Field field, IntrospectedTable introspectedTable) { if (suppressAllComments) { return; } StringBuilder sb = new StringBuilder(); field.addJavaDocLine("/**"); sb.append(" * "); sb.append(introspectedTable.getFullyQualifiedTable()); field.addJavaDocLine(sb.toString().replace("\n", " ")); field.addJavaDocLine(" */"); } public void addGeneralMethodComment(Method method, IntrospectedTable introspectedTable) { if (suppressAllComments) { return; } method.addJavaDocLine("/**"); addJavadocTag(method, false); method.addJavaDocLine(" */"); } /** * 设置getter方法注释 */ public void addGetterComment(Method method, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn) { if (suppressAllComments) { return; } method.addJavaDocLine("/**"); StringBuilder sb = new StringBuilder(); sb.append(" * "); sb.append(introspectedColumn.getRemarks()); method.addJavaDocLine(sb.toString().replace("\n", " ")); sb.setLength(0); //加入系统用户 sb.append(" * @author "); sb.append(systemPro.getProperty("user.name")); method.addJavaDocLine(sb.toString().replace("\n", " ")); sb.setLength(0); //是否加入时间戳 if(suppressDate){ sb.append(" * @date " + nowTime); method.addJavaDocLine(sb.toString().replace("\n", " ")); sb.setLength(0); } sb.append(" * @return "); sb.append(introspectedColumn.getActualColumnName()); sb.append(" "); sb.append(introspectedColumn.getRemarks()); method.addJavaDocLine(sb.toString().replace("\n", " ")); method.addJavaDocLine(" */"); } /** * 设置setter方法注释 */ public void addSetterComment(Method method, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn) { if (suppressAllComments) { return; } method.addJavaDocLine("/**"); StringBuilder sb = new StringBuilder(); sb.append(" * "); sb.append(introspectedColumn.getRemarks()); method.addJavaDocLine(sb.toString().replace("\n", " ")); sb.setLength(0); //加入系统用户 sb.append(" * @author "); sb.append(systemPro.getProperty("user.name")); method.addJavaDocLine(sb.toString().replace("\n", " ")); sb.setLength(0); //是否加入时间戳 if(suppressDate){ sb.append(" * @date " + nowTime); method.addJavaDocLine(sb.toString().replace("\n", " ")); sb.setLength(0); } Parameter parm = method.getParameters().get(0); sb.append(" * @param "); sb.append(parm.getName()); sb.append(" "); sb.append(introspectedColumn.getRemarks()); method.addJavaDocLine(sb.toString().replace("\n", " ")); method.addJavaDocLine(" */"); } public void addClassComment(InnerClass innerClass, IntrospectedTable introspectedTable, boolean markAsDoNotDelete) { if (suppressAllComments) { return; } StringBuilder sb = new StringBuilder(); innerClass.addJavaDocLine("/**"); sb.append(" * "); sb.append(introspectedTable.getFullyQualifiedTable()); innerClass.addJavaDocLine(sb.toString().replace("\n", " ")); sb.setLength(0); sb.append(" * @author "); sb.append(systemPro.getProperty("user.name")); sb.append(" "); sb.append(nowTime); innerClass.addJavaDocLine(" */"); } @Override public void addModelClassComment(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) { // TODO Auto-generated method stub } @Override public void addGeneralMethodAnnotation(Method method, IntrospectedTable introspectedTable, Set<FullyQualifiedJavaType> imports) { // TODO Auto-generated method stub } @Override public void addGeneralMethodAnnotation(Method method, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn, Set<FullyQualifiedJavaType> imports) { // TODO Auto-generated method stub } @Override public void addFieldAnnotation(Field field, IntrospectedTable introspectedTable, Set<FullyQualifiedJavaType> imports) { // TODO Auto-generated method stub } @Override public void addFieldAnnotation(Field field, IntrospectedTable introspectedTable, IntrospectedColumn introspectedColumn, Set<FullyQualifiedJavaType> imports) { // TODO Auto-generated method stub } @Override public void addClassAnnotation(InnerClass innerClass, IntrospectedTable introspectedTable, Set<FullyQualifiedJavaType> imports) { // TODO Auto-generated method stub } }