上一節搭建好了SSM後臺框架,這一節將根據表結構建立實體及映射文件以及mapper接口。若是表過多,會很麻煩,因此mybatis提供了逆向工程來解決這個問題。
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<?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> <!-- 是否去除自動生成的註釋 true:是 : false:否 --> <property name="suppressAllComments" value="true" /> </commentGenerator> <!--數據庫鏈接的信息:驅動類、鏈接地址、用戶名、密碼 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/luolan" userId="root" password="123456"> </jdbcConnection> <!-- 默認false,把JDBC DECIMAL 和 NUMERIC 類型解析爲 Integer,爲 true時把JDBC DECIMAL和 NUMERIC 類型解析爲java.math.BigDecimal --> <javaTypeResolver> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!-- targetProject:生成PO類的位置 --> <javaModelGenerator targetPackage="com.luolan.entity" targetProject=".\src"> <!-- enableSubPackages:是否讓schema做爲包的後綴 --> <property name="enableSubPackages" value="false" /> <!-- 從數據庫返回的值被清理先後的空格 --> <property name="trimStrings" value="true" /> </javaModelGenerator> <!-- targetProject:mapper映射文件生成的位置 --> <sqlMapGenerator targetPackage="com.luolan.mapping" targetProject=".\src"> <!-- enableSubPackages:是否讓schema做爲包的後綴 --> <property name="enableSubPackages" value="false" /> </sqlMapGenerator> <!-- targetPackage:mapper接口生成的位置 --> <javaClientGenerator type="XMLMAPPER" targetPackage="com.luolan.dao" targetProject=".\src"> <!-- enableSubPackages:是否讓schema做爲包的後綴 --> <property name="enableSubPackages" value="false" /> </javaClientGenerator> <!-- 指定數據庫表 --> <table tableName="advert"></table> <table tableName="img"></table> <table tableName="new"></table> <table tableName="product"></table> <table tableName="proonetype"></table> <table tableName="protwotype"></table> <table tableName="solution"></table> <table tableName="solutiononetype"></table> <table tableName="solutiontwotype"></table> <table tableName="user"></table> </context> </generatorConfiguration>
package com.luolan.system; 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 Generator { 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("C:/Java/newjava/luolan/src/config/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 { Generator generatorSqlmap = new Generator(); generatorSqlmap.generator(); } catch (Exception e) { e.printStackTrace(); } } }
右擊執行mian方法,刷新項目,再次點開com.luolan.entity包發現已經生成實體類。com.luolan.mapping已經生成mapper映射文件。
至此大功告成!!!java