【代码没有任何输出 _spring _mybatis 】

代码没有任何输出

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spring mybatis

详细描述

错误截图

源码

import com.test.mapper.UserMapper;
import com.test.pojo.User;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;


public class TestMybatis {
    private static final Log log = LogFactory.getLog(TestMybatis.class);
    private ApplicationContext applicationContext;
    private User user;

    @Before
    public void init(){
        applicationContext = new ClassPathXmlApplicationContext("classpath:application.xml");
    }
    @Test
    public void testDeleteUserById(){
        UserMapper UserMapper = applicationContext.getBean(UserMapper.class);
        UserMapper.deleteUserById(6);
    }
    @Test
    public void testSaveUser(){
        UserMapper UserMapper = applicationContext.getBean(UserMapper.class);
        User User = new User();
        User.setName("ali");
        User.setDept("EEEEE");
        UserMapper.saveUser(User);
    }
    @Test
    public void testUpdateUser(){
        UserMapper UserMapper = applicationContext.getBean(UserMapper.class);
        User User = new User();
        User.setName("djiang");
        User.setDept("FFFF");
        User.setId(7);
        UserMapper.updateUser(User);
    }
    @Test
    public void testFindUserById(){
        UserMapper UserMapper = applicationContext.getBean(UserMapper.class);
        User user = UserMapper.findUserById(1);
        log.info(user);
        log.info("User Id: " + user.getId());
        log.info("User Name: " + user.getName());System.out.println("User Dept: " + user.getDept());
    }
}

编辑于2024-11-24

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[无名弟子]黄东江
0

这个报得是空指针异常，因为你引用的对象"User"是自己前面定义的private User User;这个并不是从spring容器中取的对象，所以是一个空的User对象调用方法，肯定报的是空指针异常。解决办法是调用Spring容器中user对象。

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编辑于2018-09-21

去第页