Spring-Mybatis 异常记录

Posted 2020-08-26 二刀

Spring  applicationconfig.xml如下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:jee="http://www.springframework.org/schema/jee"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.0.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
    <!-- 配置数据源 ,连接池用的阿里druid-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <!--
        <property name="url" value="jdbc:mysql://IP+数据库"/>
        <property name="username" value="用户名"/>
        <property name="password" value="密码"/>
         -->
        <property name="url" value="jdbc:mysql://127.0.0.1:3306/test"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
    </bean>
    <!-- 配置mybatis的sqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 自动扫描mappers.xml文件 -->
        <property name="mapperLocations" value="classpath:mapper/*.xml"></property>
        <!-- mybatis配置文件 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
    </bean>
    <!-- DAO -->
    <bean id="infoDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
        <property name="mapperInterface" value="net.xjdsz.dao.InfoDao" />
        <property name="sqlSessionFactory" value="sqlSessionFactory"></property>
    </bean>
</beans>

info.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
    <mapper namespace="net.xjdsz.dao.InfoDao">
        <!-- 查询条件:账号密码用户类型. 0第一个参数,1第二个参数,对应dao接口参数 -->
        <select id="FindAllInfos" resultType="net.xjdsz.model.Info">
            SELECT * FROM info limit 1
        </select>
        <!--
        <select id="getAllUsers" resultMap="userResult">
            SELECT USER_CODE,USER_NAME,USER_PWD,CREATE_DATE
            FROM BLOG_USER
        </select>
         -->
    </mapper>

mybatis-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC
        "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <mappers>
        <mapper resource="mapper/info.xml"/>
    </mappers>
</configuration>

会报错：

警告: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name \'sqlSessionFactory\' defined in class path resource [spring-config/ApplicationContext.xml]: Invocation of init method failed; nested exception is org.springframework.core.NestedIOException: Failed to parse mapping resource: \'file [E:\\个人资料\\个人代码\\spring-batis\\target\\classes\\mapper\\info.xml]\'; nested exception is org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. Cause: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for net.xjdsz.dao.InfoDao.FindAllInfos

原因是，加载了两次mapper，注释掉红框即可

修改后依然会报错：

警告: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name \'infoDao\' defined in class path resource [spring-config/ApplicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type \'java.lang.String\' to required type \'org.apache.ibatis.session.SqlSessionFactory\' for property \'sqlSessionFactory\'; nested exception is java.lang.IllegalStateException: Cannot convert value of type \'java.lang.String\' to required type \'org.apache.ibatis.session.SqlSessionFactory\' for property \'sqlSessionFactory\': no matching editors or conversion strategy found

原因是，sqlSessionFactory注入的时候，关键字用错了，value应该改成ref？？？

 

 运行代码，运行成功

package net.xjdsz.service.impl;
import net.xjdsz.dao.InfoDao;
import net.xjdsz.model.Info;
import net.xjdsz.service.InfoService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
 * Created by dingshuo on 2017/1/3.
 */
public class InfoServiceImpl implements InfoService {
    private  InfoDao infoDao;
    @Override
    public Info DoWork() {
        Info info=infoDao.FindAllInfos();
        return info;
    }
    public static void main(String[] args){
        ApplicationContext ctx = null;
        ctx = new ClassPathXmlApplicationContext("spring-config/ApplicationContext.xml");
        InfoDao infoDao=(InfoDao)ctx.getBean("infoDao");
        Info aaa=infoDao.FindAllInfos();
        System.out.println(aaa.toString());
    }
}

运行结果

Connected to the target VM, address: \'127.0.0.1:58958\', transport: \'socket\'
一月 03, 2017 5:31:51 下午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@7a0ac6e3: startup date [Tue Jan 03 17:31:51 CST 2017]; root of context hierarchy
一月 03, 2017 5:31:51 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [spring-config/ApplicationContext.xml]
一月 03, 2017 5:31:52 下午 com.alibaba.druid.pool.DruidDataSource info
信息: {dataSource-1} inited
Disconnected from the target VM, address: \'127.0.0.1:58958\', transport: \'socket\'
ID:1,TM:Thu Nov 10 00:00:00 CST 2016,DESC:nihao ,FLAG:0
Process finished with exit code 0