@Autowired request=true

@Autowired注解是一个Spring框架提供的依赖注入(DI)注解，用于自动装配对象到其他对象中。当request=true时，这个特性通常应用在Controller处理HTTP请求的方法上，表示需要从当前HTTP请求上下文中获取Bean。这意味着Spring会查找并注入一个实现了WebRequestAware接口或者名字匹配的bean，以便方法可以访问相关的HttpServletRequest对象。

例如：

@RestController
public class MyController {
    private final HttpServletRequest request; // 当前HTTP请求

    // 使用@Autowired注解，并指定request=true
    @Autowired(request = true)
    public MyController(WebRequestAware webRequest) {
        this.request = webRequest.getRequest();
    }

    // 然后可以在方法中直接使用request对象
    public String handleRequest() {
        return request.getParameter("param");
    }
}

相关问题

在springboot用@Controller @ResponseBody@Autowired @PostMapping@Service@Mapper@Data实现用户登录案例

好的，下面是一个基于 Spring Boot 的用户登录案例：

1. 创建 User 实体类

@Data
public class User {
    private String username;
    private String password;
}

2. 创建 UserService 接口和实现类

public interface UserService {
    User login(String username, String password);
}

@Service
public class UserServiceImpl implements UserService {

    @Override
    public User login(String username, String password) {
        // 在这里校验用户名和密码是否正确，省略实现
        return new User(username, password);
    }
}

3. 创建 UserController 控制器

@Controller
public class UserController {

    @Autowired
    private UserService userService;

    @PostMapping("/login")
    @ResponseBody
    public String login(@RequestBody User user) {
        User loginUser = userService.login(user.getUsername(), user.getPassword());
        if (loginUser != null) {
            return "登录成功";
        } else {
            return "用户名或密码错误";
        }
    }
}

4. 配置 mybatis 和数据库信息

在 application.properties 文件中添加以下配置：

spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&autoReconnect=true&failOverReadOnly=false&maxReconnects=10
spring.datasource.username=root
spring.datasource.password=root
mybatis.mapper-locations=classpath:mapper/*.xml

5. 创建 UserMapper 接口和 XML 映射文件

@Mapper
public interface UserMapper {
    User selectByUsernameAndPassword(@Param("username") String username, @Param("password") String password);
}

在 mapper 文件夹下创建 UserMapper.xml 文件，编写 SQL 语句：

<mapper namespace="com.example.demo.mapper.UserMapper">

    <resultMap id="BaseResultMap" type="com.example.demo.entity.User">
        <id column="username" property="username" />
        <result column="password" property="password" />
    </resultMap>

    <select id="selectByUsernameAndPassword" resultMap="BaseResultMap">
        select * from user where username=#{username} and password=#{password}
    </select>

</mapper>

6. 编写测试代码

@RunWith(SpringRunner.class)
@SpringBootTest
public class UserControllerTests {

    @Autowired
    private UserController userController;

    @Test
    public void testLogin() {
        User user = new User();
        user.setUsername("admin");
        user.setPassword("123456");
        String result = userController.login(user);
        assertEquals("登录成功", result);
    }
}

以上就是一个基于 Spring Boot 的用户登录案例的实现过程，希望对你有所帮助。

@RestController @RequestMapping("/restful/commonUse") public class CommonUseController { @Autowired private UserService userService; @Autowired private CommonUseService commonUseService; //统一的数据查看 @RequestMapping("/view") public ReturnCodeUtil view(@RequestBody CommonUse commonUse) { ReturnCodeUtil returnCodeUtil = new ReturnCodeUtil(); if(String.valueOf(commonUse.getUserId()).equals("0") || "".equals(commonUse.getUserFlag()) || commonUse.getUserFlag() == null ){ returnCodeUtil.setResult(false); return returnCodeUtil; } List<CommonUse> view = commonUseService.view(commonUse); returnCodeUtil.setResult(true); returnCodeUtil.setData(view); return returnCodeUtil; } //统一的数据更改 @RequestMapping("/edit") public ReturnCodeUtil edit(@RequestBody CommonUse commonUse) { ReturnCodeUtil returnCodeUtil = new ReturnCodeUtil(); if(String.valueOf(commonUse.getUserId()).equals("0") || "".equals(commonUse.getUserFlag()) || commonUse.getUserFlag() == null ){ returnCodeUtil.setResult(false); return returnCodeUtil; } int res = commonUseService.edit(commonUse); if(res>0) { returnCodeUtil.setResult(true); }else returnCodeUtil.setResult(false); return returnCodeUtil; } //统一的数据插入 @RequestMapping("/add") public ReturnCodeUtil add(@RequestBody CommonUse commonUse) { ReturnCodeUtil returnCodeUtil = new ReturnCodeUtil(); int add = commonUseService.add(commonUse); if(add >0){ returnCodeUtil.setResult(true); }else { returnCodeUtil.setResult(false); } return returnCodeUtil; } //统一数据删除 @RequestMapping("/delete") public ReturnCodeUtil delete(@RequestBody CommonUse commonUse) { ReturnCodeUtil returnCodeUtil = new ReturnCodeUtil(); int res = commonUseService.delete(commonUse); if(res >0){ returnCodeUtil.setResult(true); }else { returnCodeUtil.setResult(false); } return returnCodeUtil; } }优化代码

可以将重复的部分提取出来，采用函数式编程的方式进行重构，提高代码的复用性和可读性，优化后的代码如下：

@RestController
@RequestMapping("/restful/commonUse")
public class CommonUseController {

@Autowired
private UserService userService;

@Autowired
private CommonUseService commonUseService;

// 统一的数据操作
private ReturnCodeUtil operateData(Function<CommonUse, Integer> function, CommonUse commonUse) {
ReturnCodeUtil returnCodeUtil = new ReturnCodeUtil();
if (String.valueOf(commonUse.getUserId()).equals("0") || "".equals(commonUse.getUserFlag()) || commonUse.getUserFlag() == null) {
returnCodeUtil.setResult(false);
return returnCodeUtil;
}
int res = function.apply(commonUse);
returnCodeUtil.setResult(res > 0);
return returnCodeUtil;
}

// 统一的数据查看
@RequestMapping("/view")
public ReturnCodeUtil view(@RequestBody CommonUse commonUse) {
List<CommonUse> view = commonUseService.view(commonUse);
ReturnCodeUtil returnCodeUtil = new ReturnCodeUtil();
returnCodeUtil.setResult(true);
returnCodeUtil.setData(view);
return returnCodeUtil;
}

// 统一的数据更改
@RequestMapping("/edit")
public ReturnCodeUtil edit(@RequestBody CommonUse commonUse) {
return operateData(commonUseService::edit, commonUse);
}

// 统一的数据插入
@RequestMapping("/add")
public ReturnCodeUtil add(@RequestBody CommonUse commonUse) {
return operateData(commonUseService::add, commonUse);
}

// 统一数据删除
@RequestMapping("/delete")
public ReturnCodeUtil delete(@RequestBody CommonUse commonUse) {
return operateData(commonUseService::delete, commonUse);
}
}

这里提取了 operateData 函数，用于统一处理数据操作，接收一个 Function 类型的参数，该参数用于指定具体的数据操作方法。同时，view 方法中的代码也进行了简化，使代码更加简洁。