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package com.unicom.test.service;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.unicom.test.dao.UserMapper;
import com.unicom.test.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserService extends ServiceImpl<UserMapper, User> {
@Autowired
private UserMapper userMapper;
// 插入用户
public boolean insertUser(User user) {
try {
int rows = userMapper.insert(user);
return rows > 0;
} catch (Exception e) {
// 可以添加日志记录异常信息
e.printStackTrace();
return false;
}
}
// 根据 ID 查询用户
public User getUserById(Long id) {
try {
return userMapper.selectById(id);
} catch (Exception e) {
// 可以添加日志记录异常信息
e.printStackTrace();
return null;
}
}
// 查询所有用户
public List<User> getAllUsers() {
try {
return userMapper.selectList(null);
} catch (Exception e) {
// 可以添加日志记录异常信息
e.printStackTrace();
return null;
}
}
// 根据条件查询用户
public List<User> getUsersByCondition(String name) {
try {
QueryWrapper<User> queryWrapper = new QueryWrapper<>();
if (name!= null) {
queryWrapper.like("name", name);
}
return userMapper.selectList(queryWrapper);
} catch (Exception e) {
// 可以添加日志记录异常信息
e.printStackTrace();
return null;
}
}
// 分页查询用户
public IPage<User> getUsersByPage(int pageNum, int pageSize) {
try {
Page<User> page = new Page<>(pageNum, pageSize);
return userMapper.selectPage(page, null);
} catch (Exception e) {
// 可以添加日志记录异常信息
e.printStackTrace();
return null;
}
}
// 更新用户信息
public boolean updateUser(User user) {
try {
int rows = userMapper.updateById(user);
return rows > 0;
} catch (Exception e) {
// 可以添加日志记录异常信息
e.printStackTrace();
return false;
}
}
// 删除用户
public boolean deleteUser(Long id) {
try {
int rows = userMapper.deleteById(id);
return rows > 0;
} catch (Exception e) {
// 可以添加日志记录异常信息
e.printStackTrace();
return false;
}
}
}