先来看一下工程结构:
GeneratorSqlmap.java文件:
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
public class GeneratorSqlmap {
public void generator() throws Exception {
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
// 指定 逆向工程配置文件
File configFile = new File("generatorConfig.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null);
}
public static void main(String[] args) throws Exception {
try {
GeneratorSqlmap generatorSqlmap = new GeneratorSqlmap();
generatorSqlmap.generator();
} catch (Exception e) {
e.printStackTrace();
}
}
}
generatorConfig.xml文件如下:
<?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>
<context id="testTables" targetRuntime="MyBatis3">
<commentGenerator>
<!-- 是否去除自动生成的注释 true:是 : false:否 -->
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!--数据库连接的信息:驱动类、连接地址、用户名、密码 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/mybatis" userId="root"
password="ljjdsql0865118">
</jdbcConnection>
<!-- <jdbcConnection driverClass="oracle.jdbc.OracleDriver"
connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:yycg"
userId="yycg"
password="yycg">
</jdbcConnection> -->
<!-- 默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer,为 true时把JDBC DECIMAL 和
NUMERIC 类型解析为java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 这个很重要 -->
<!-- targetProject:生成PO类的位置 -->
<javaModelGenerator targetPackage="com.smxy.ljj.ssm.pojo"
targetProject=".\src">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
<!-- 从数据库返回的值被清理前后的空格 -->
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- 这个很重要 -->
<!-- targetProject:mapper映射文件生成的位置 -->
<sqlMapGenerator targetPackage="com.smxy.ljj.ssm.mapper"
targetProject=".\src">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
</sqlMapGenerator>
<!-- 这个很重要 -->
<!-- targetPackage:mapper接口生成的位置 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.smxy.ljj.ssm.mapper"
targetProject=".\src">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
</javaClientGenerator>
<!-- 这个很重要 -->
<!-- 指定数据库表 -->
<table tableName="items"></table>
<table tableName="orders"></table>
<table tableName="orderdetail"></table>
<table tableName="user"></table>
<!-- <table schema="" tableName="sys_user"></table>
<table schema="" tableName="sys_role"></table>
<table schema="" tableName="sys_permission"></table>
<table schema="" tableName="sys_user_role"></table>
<table schema="" tableName="sys_role_permission"></table> -->
<!-- 有些表的字段需要指定java类型
<table schema="" tableName="">
<columnOverride column="" javaType="" />
</table> -->
</context>
</generatorConfiguration>
上面我有注释“这个很重要”,这些地方要注意写对。
generatorConfig-base.xml文件如下:
<?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>
<context id="caigouTables" targetRuntime="MyBatis3">
<commentGenerator>
<!-- 是否去除自动生成的注释 true:是 : false:否 -->
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!--数据库连接的信息:驱动类、连接地址、用户名、密码 -->
<!-- <jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/mybatis" userId="root"
password="mysql">
</jdbcConnection> -->
<jdbcConnection driverClass="oracle.jdbc.OracleDriver"
connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:yycg"
userId="yycg"
password="yycg">
</jdbcConnection>
<!-- 默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer true,把JDBC DECIMAL 和
NUMERIC 类型解析为java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- targetProject:生成PO类的位置 -->
<javaModelGenerator targetPackage="yycg.base.pojo.po"
targetProject=".\src">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
<!-- 从数据库返回的值被清理前后的空格 -->
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- targetPackage:mapper映射文件生成的位置 -->
<sqlMapGenerator targetPackage="yycg.base.dao.mapper"
targetProject=".\src">
<property name="enableSubPackages" value="false" />
</sqlMapGenerator>
<!-- targetPackage:mapper接口的生成位置 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="yycg.base.dao.mapper"
targetProject=".\src">
<property name="enableSubPackages" value="false" />
</javaClientGenerator>
<!-- 指定表 -->
<!-- <table schema="" tableName="sysuser" /> -->
<!-- 系统用户
这里不指定schema,逆向工程会查询sysuser都有哪些schema,对每个schema生成对象
-->
<!-- <table schema="yycg" tableName="sysuser" /> -->
<!-- 监督单位 -->
<table schema="" tableName="userjd" />
<!-- 供应商 -->
<table schema="" tableName="usergys" />
<table schema="" tableName="usergysarea" />
<!-- 医院 -->
<table schema="" tableName="useryy" />
<!-- 数据字典 -->
<table schema="" tableName="dictinfo" />
<table schema="" tableName="dicttype" />
<!-- 系统参数 -->
<table schema="" tableName="basicinfo" />
<!-- 区域表 -->
<table schema="" tableName="bss_sys_area" />
</context>
</generatorConfiguration>
generatorConfig-business.xml文件如下:
<?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>
<context id="caigouTables" targetRuntime="MyBatis3">
<commentGenerator>
<!-- 是否去除自动生成的注释 true:是 : false:否 -->
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!--数据库连接的信息:驱动类、连接地址、用户名、密码 -->
<!-- <jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/uni" userId="root"
password="mysql">
</jdbcConnection> -->
<jdbcConnection driverClass="oracle.jdbc.OracleDriver"
connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:yycg"
userId="yycg"
password="yycg">
</jdbcConnection>
<!-- 默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer true,把JDBC DECIMAL 和
NUMERIC 类型解析为java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- targetProject:自动生成代码的位置 -->
<javaModelGenerator targetPackage="yycg.business.pojo.po"
targetProject=".\src">
<!-- enableSubPackages:是否让schema作为包的后缀 -->
<property name="enableSubPackages" value="false" />
<!-- 从数据库返回的值被清理前后的空格 -->
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- targetPackage:mapper映射文件生成的位置 -->
<sqlMapGenerator targetPackage="yycg.business.dao.mapper"
targetProject=".\src">
<property name="enableSubPackages" value="false" />
</sqlMapGenerator>
<!-- targetPackage:mapper接口的生成位置 -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="yycg.business.dao.mapper"
targetProject=".\src">
<property name="enableSubPackages" value="false" />
</javaClientGenerator>
<!-- <table schema="" tableName="useryy" />
<table schema="" tableName="userjd" />
<table schema="" tableName="usergys" /> -->
<!-- <table schema="" tableName="ypxx" >
指定字段生成类型
<columnOverride column="zbjg" javaType="java.lang.Float" />
</table> -->
<!-- <table schema="" tableName="gysypml" />
<table schema="" tableName="gysypml_control" /> -->
<!-- <table schema="" tableName="yyypml" /> -->
<!--
<table schema="" tableName="yycgd" >
</table>
<table schema="" tableName="yycgdmx" >
<columnOverride column="zbjg" javaType="java.lang.Float" />
<columnOverride column="jyjg" javaType="java.lang.Float" />
<columnOverride column="cgl" javaType="java.lang.Integer" />
<columnOverride column="cgje" javaType="java.lang.Float" />
</table> -->
<!-- <table schema="" tableName="yycgdrk" >
<columnOverride column="rkje" javaType="java.lang.Float" />
<columnOverride column="ypyxq" javaType="java.lang.Float" />
<columnOverride column="rkl" javaType="java.lang.Integer" />
</table> -->
<table schema="" tableName="yybusiness" >
<columnOverride column="zbjg" javaType="java.lang.Float" />
<columnOverride column="jyjg" javaType="java.lang.Float" />
<columnOverride column="cgl" javaType="java.lang.Integer" />
<columnOverride column="cgje" javaType="java.lang.Float" />
<columnOverride column="rkje" javaType="java.lang.Float" />
<columnOverride column="ypyxq" javaType="java.lang.Float" />
<columnOverride column="rkl" javaType="java.lang.Integer" />
<columnOverride column="thje" javaType="java.lang.Float" />
<columnOverride column="thl" javaType="java.lang.Integer" />
<columnOverride column="jsje" javaType="java.lang.Float" />
<columnOverride column="jsl" javaType="java.lang.Integer" />
</table>
</context>
</generatorConfiguration>
这是运行完java程序的效果图
在这之前我遇到了一个问题:java.math.BigInteger cannot be cast to java.lang.Long
因为我的mysql版本是8.0以上的,而我用是的mysql-connector-java-5.1.28-bin,结果就出现这样的问题,我把mysql-connector-java-5.1.28-bin换成mysql-connector-java-5.1.10-bin,这样这个问题就解决了。