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

一、异常描述

在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)
    at org.mybatis.generator.internal.db.ConnectionFactory.getConnection(ConnectionFactory.java:71)
    at org.mybatis.generator.config.Context.getConnection(Context.java:498)
    at org.mybatis.generator.config.Context.introspectTables(Context.java:408)
    at org.mybatis.generator.api.MyBatisGenerator.generate(MyBatisGenerator.java:221)
    at org.mybatis.generator.api.MyBatisGenerator.generate(MyBatisGenerator.java:132)
    at com.xwood.gen.GeneratorExecuter.generator(GeneratorExecuter.java:24)
    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" 
            connectionURL="jdbc:mysql://192.168.1.9:3306/test"  
            userId="root"     
            password="123456"> 
        </jdbcConnection>

    3.详细generator.xml参考如下

      <?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:数据库的JDBC驱动--> 
   <classPathEntry location="C:\WS\mybatis-generator-core-1.3.1\lib\mysql-connector-java-3.2.0-alpha-bin.jar" /> 
 
   <context id="DB2Tables" targetRuntime="MyBatis3">
     
        <!-- 去除自动生成的注释 -->
       <commentGenerator><property name="suppressAllComments" value="true" /></commentGenerator> 
     
       <jdbcConnection driverClass="com.mysql.jdbc.Driver" 
           connectionURL="jdbc:mysql://192.168.1.9:3306/test"  
             
           userId="root"     
           password="123456"> 
       </jdbcConnection>
     
       <javaTypeResolver >  
           <property name="forceBigDecimals" value="false" />   
       </javaTypeResolver>
             
       <!-- targetProject:自动生成model代码的位置 -->   
       <javaModelGenerator targetPackage="com.xwood.gen.model" targetProject="C:\WS\NJ\project\xwood-project\JavaTest\src\">   
           <property name="enableSubPackages" value="true" />   
           <property name="trimStrings" value="true" />  
       </javaModelGenerator>
         
       <!-- targetProject:自动生成mappers代码的位置 -->   
       <sqlMapGenerator targetPackage="com.xwood.gen.mappers"  targetProject="C:\WS\NJ\project\xwood-project\JavaTest\src\">     
            <property name="enableSubPackages" value="true" />   
       </sqlMapGenerator>
         
       <!-- targetProject:自动生成dao代码的位置 -->   
       <javaClientGenerator type="XMLMAPPER" targetPackage="com.xwood.gen.dao"  targetProject="C:\WS\NJ\project\xwood-project\JavaTest\src\">    
           <property name="enableSubPackages" value="true" /> 
       </javaClientGenerator>
         
             
       <!-- 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-->
       <table  tableName="guser" domainObjectName="Guser" >
         
       </table> 
     
   </context>  
     
</generatorConfiguration>

来源：CSDN

作者：刘天龙

链接：https://blog.csdn.net/weixin_44933570/article/details/104214928

标签

jdbc

context