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解决运行mybatis-generator生成java.sql.SQLException: Cannot connect to database (possibly bad driver/URL combination)异常

标签:mybatis-generator,异常,SQLException,sql     发布时间:2017-10-14   

一、异常描述

eclipse中通过mybatis-generator生成dao、mappers及model代码时(步骤参考“通过mybatis-generator-core工具自...”页面),报“java.sql.SQLException: Cannot connect to database (possibly bad driver/URL combination)”异常,错误轨迹如下

java.sql.SQLException: Cannot connect to database (possibly bad driver/URL combination)@b@	at org.mybatis.generator.internal.db.ConnectionFactory.getConnection(ConnectionFactory.java:71)@b@	at org.mybatis.generator.config.Context.getConnection(Context.java:498)@b@	at org.mybatis.generator.config.Context.introspectTables(Context.java:408)@b@	at org.mybatis.generator.api.MyBatisGenerator.generate(MyBatisGenerator.java:221)@b@	at org.mybatis.generator.api.MyBatisGenerator.generate(MyBatisGenerator.java:132)@b@	at com.xwood.gen.GeneratorExecuter.generator(GeneratorExecuter.java:24)@b@	at com.xwood.gen.GeneratorExecuter.main(GeneratorExecuter.java:29)

二、解决办法

1.从异常描述信息直接可以看出是generator.xml的jdbcConnection配置文件配错了

2.关于jdbcConnection配置,mysql的配置应该如下,"connectionURL="jdbc:mysql://192.168.1.9:3306/test"

<jdbcConnection driverClass="com.mysql.jdbc.Driver" @b@			connectionURL="jdbc:mysql://192.168.1.9:3306/test"  @b@			userId="root"     @b@			password="123456"> @b@		</jdbcConnection>

3.详细generator.xml参考如下

<?xml version="1.0" encoding="UTF-8"?>@b@<!DOCTYPE generatorConfiguration  PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"  "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">@b@<generatorConfiguration>@b@ @b@    <!-- classPathEntry:数据库的JDBC驱动--> @b@    <classPathEntry location="C:\WS\mybatis-generator-core-1.3.1\lib\mysql-connector-java-3.2.0-alpha-bin.jar" /> @b@ @b@    <context id="DB2Tables" targetRuntime="MyBatis3">@b@     @b@         <!-- 去除自动生成的注释 -->@b@        <commentGenerator><property name="suppressAllComments" value="true" /></commentGenerator> @b@     @b@        <jdbcConnection driverClass="com.mysql.jdbc.Driver" @b@            connectionURL="jdbc:mysql://192.168.1.9:3306/test"  @b@             @b@            userId="root"     @b@            password="123456"> @b@        </jdbcConnection>@b@     @b@        <javaTypeResolver >  @b@            <property name="forceBigDecimals" value="false" />   @b@        </javaTypeResolver>@b@             @b@        <!-- targetProject:自动生成model代码的位置 -->   @b@        <javaModelGenerator targetPackage="com.xwood.gen.model" targetProject="C:\WS\NJ\project\xwood-project\JavaTest\src\">   @b@            <property name="enableSubPackages" value="true" />   @b@            <property name="trimStrings" value="true" />  @b@        </javaModelGenerator>@b@         @b@        <!-- targetProject:自动生成mappers代码的位置 -->   @b@        <sqlMapGenerator targetPackage="com.xwood.gen.mappers"  targetProject="C:\WS\NJ\project\xwood-project\JavaTest\src\">     @b@             <property name="enableSubPackages" value="true" />   @b@        </sqlMapGenerator>@b@         @b@        <!-- targetProject:自动生成dao代码的位置 -->   @b@        <javaClientGenerator type="XMLMAPPER" targetPackage="com.xwood.gen.dao"  targetProject="C:\WS\NJ\project\xwood-project\JavaTest\src\">    @b@            <property name="enableSubPackages" value="true" /> @b@        </javaClientGenerator>@b@         @b@             @b@        <!-- tableName:用于自动生成代码的数据库表;domainObjectName:对应于数据库表的javaBean类名-->@b@        <table  tableName="guser" domainObjectName="Guser" >@b@         @b@        </table> @b@     @b@    </context>  @b@     @b@</generatorConfiguration>

三、数据库oracle配置错误

原来错误配置如下,完整配置请参考“更多页”详情

<jdbcConnection driverClass="oracle.jdbc.OracleDriver" @b@			connectionURL="jdbc\:oracle\:thin\:@127.0.0.1\:1521\:oracle"    @b@			userId="testa"     @b@			password="123456"> @b@		</jdbcConnection>

应该修改为下

<jdbcConnection driverClass="oracle.jdbc.OracleDriver" @b@			connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:oracle"    @b@			userId="testa"     @b@			password="123456"> @b@		</jdbcConnection>
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