MyBatis-Plus中Service接口的lambdaUpdate用法及实例分析

import com.baomidou.mybatisplus.extension.service.IService;

public interface UserService extends IService<User> {

    boolean updateUser(User user);
}

import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {

    @Override
    public boolean updateUser(User user) {
        LambdaUpdateWrapper<User> updateWrapper = new LambdaUpdateWrapper<>();
        updateWrapper.eq(User::getId, user.getId())
                     .set(User::getUsername, user.getUsername())
                     .set(User::getPhoneNumber, user.getPhoneNumber());
        int rows = baseMapper.update(null, updateWrapper);
        return rows > 0;
    }
}

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
public class UserServiceTest {

    @Autowired
    private UserService userService;

    @Test
    public void testUpdateUser() {
        User user = new User();
        user.setId(1L); // 假设要更新ID为1的用户信息
        user.setUsername("John Doe"); // 设置新的用户名
        user.setPhoneNumber("1234567890"); // 设置新的手机号码

        boolean result = userService.updateUser(user);
        System.out.println("Update successful: " + result);
    }
}