基于@AllArgsConstructor与@Value共用的问题解决

这篇文章主要介绍了基于@AllArgsConstructor与@Value共用的问题解决，具有很好的参考价值，希望对大家有所帮助。如有错误或未考虑完全的地方，望不吝赐教

@AllArgsConstructor与共用的问题解决

平时我们用lombok的方式来实现Bean的构造函数方式的注入，但是当遇到@Value注解的时候，就会出现问题，

看下面这段代码

				
									/**

									 * @author sunhan

									 */

									@RestController

									@AllArgsConstructor

									@RequestMapping("test")

									public class TestController {

									    @Value("${test}")

									    private String test;

									    private TestService testService;

									    @GetMapping()

									    public String get() {

									        System.out.println(test);

									        return testService.get();

									    }

									}

启动项目的时候，会抛出异常

***************************
APPLICATION FAILED TO START
***************************

Description:

Parameter 0 of constructor in com.good.base.controller.TestController required a bean of type 'java.lang.String' that could not be found.

Action:

Consider defining a bean of type 'java.lang.String' in your configuration.

如何解决这个问题呢？

其实很简单，将AllArgsConstructor改成RequiredArgsConstructor，然后把需要注入的bean改成final类型的，就可以了

				
									@RestController

									@RequiredArgsConstructor

									@RequestMapping("test")

									public class TestController {

									    @Value("${test}")

									    private String test;

									    private final TestService testService;

									    @GetMapping()

									    public String get() {

									        System.out.println(test);

									        return testService.get();

									    }

									}

参考：

@AllArgsConstructor导致@value注入失败

				
									@AllArgsConstructor

									@RestController

									@RequestMapping("xx/xx" )

									public class WxUserController extends BaseController {     

									    private final WxUserService service; 

									    private final PointsDetailService pointsDetailService; 

									    private final WxUserPointsService wxUserPointsService; 

									    @Value("${points.registerPoints}")

									    private int registerPoints;  

									................................ 

									}