MyBatis 使用Generator自动生成Model , Dao, mapper

最近   我新建了一 个maven 项目，使用的是spring + springmvc + mybatis框架。

听说Mybatis可以自动生成model和mapper以及dao层，我就从网上查了查资料，自己试着做一下，其中遇到一 个很麻烦的问题，

就是用dos 命令执行  java -jar mybatis-generator-core-1.3.2.jar -configfile generator.xml -overwrite  时 报出  “前言中不允许有内容

这是因为 用记事本打开xml文件转化为UTF-8会有一个BOM头，所以java在读取时就会报以上错误

解决方法：用notepad++打开，在格式选择“以UTF-8无BOM格式编码”，然后保存, 就可以了。

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" alt="" />

从网上下载这两个jar 包，

generator.xml的内容如下

<?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>

    <classPathEntry location="D:\java\generator\mysql-connector-java-5.1.32.jar" /> 

    <context id="DB2Tables" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
        </commentGenerator>

         <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/smart4j" userId="root" password="root"> 

        </jdbcConnection>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <javaModelGenerator targetPackage="com.telecom.myshiro.model" targetProject="D:\java\generator\src">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <sqlMapGenerator targetPackage="com.telecom.myshiro.mapping" targetProject="D:\java\generator\src">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <javaClientGenerator type="XMLMAPPER" targetPackage="com.telecom.myshiro.dao" targetProject="D:\java\generator\src">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <table tableName="userinfo" domainObjectName="UserInfo" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
        <table tableName="s_user" domainObjectName="CourseInfo" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
    </context>
</generatorConfiguration>

然后在目录里执行dos命令就可以了。

java -jar mybatis-generator-core-1.3.2.jar -configfile generator.xml -overwrite