Question

我正在尝试在我的mvc控制器中使用rest调用，但每次执行此操作都会返回一个http状态为302的null主体。此外，我使用带有spring security的spring boot来获取https。

我已经关注了此处的代码示例：http://websystique.com/springmvc/spring-mvc-4-restful-web-services-crud-example-resttemplate/ 和Get list of JSON objects with Spring RestTemplate但是这些都不起作用

有人可以指出我正确的方向吗

谢谢，

REST

@RequestMapping(value = "/api/*")
@RestController
public class PostApiController {

static final Logger logger = LogManager.getLogger(PostApiController.class.getName());
private final PostService postService;


@Inject
public PostApiController(final PostService postService) {
    this.postService = postService;
}

  //-------------------Retrieve All Posts--------------------------------------------------------

@RequestMapping(value = "post", method = RequestMethod.GET)
public ResponseEntity<List<Post>> getAllPosts() {
    List<Post> posts = postService.findAllPosts();
    if(posts.isEmpty()){
        return new ResponseEntity<List<Post>>(HttpStatus.NO_CONTENT);//You many decide to return HttpStatus.NOT_FOUND
    }
    return new ResponseEntity<List<Post>>(posts, HttpStatus.OK);
  }

}

控制器

@Controller
public class PostController {

static final Logger logger = LogManager.getLogger(PostController.class.getName());

 public static final String REST_SERVICE_URI =  "http://localhost:8080/api"; //"http://localhost:8080/api";


private final PostService postService;

@Inject
public PostController(final PostService postService) {
    this.postService = postService;
}



@SuppressWarnings("unchecked")
@RequestMapping(value = "/getAll")
// public String create(@Valid Post post, BindingResult bindingResult, Model
// model) {
public ModelAndView getAll() {
    // if (bindingResult.hasErrors()) {
    // return "mvchome";
    // }


     RestTemplate restTemplate = new RestTemplate();

     ResponseEntity<List<Post>> responseEntity = restTemplate.exchange(REST_SERVICE_URI+"/post",HttpMethod.GET, null, new ParameterizedTypeReference<List<Post>>() {});
    // ResponseEntity<Post[]> responseEntity = restTemplate.getForEntity(REST_SERVICE_URI+"/post", Post[].class);
     List<Post> postsMap = responseEntity.getBody();
     MediaType contentType = responseEntity.getHeaders().getContentType();
     HttpStatus statusCode = responseEntity.getStatusCode();

       // List<LinkedHashMap<String, Object>> postsMap = restTemplate.getForObject(REST_SERVICE_URI+"/post", List.class);
      //  String s= REST_SERVICE_URI+"/post";
       // logger.info(s);
        if(postsMap!=null){
            for(Post map : postsMap){
                logger.info("User : id="+map.getUid());
            }
        }else{
            logger.info("No user exist----------");
        }



    //List<Post> postList = postService.findAllPosts();
    ModelAndView mav = new ModelAndView("mvchome");
    mav.addObject("postsList", postsMap);
    Post newpost = new Post();

    mav.addObject("post", newpost);
    return mav;

    }
 }

*****修复我的问题我修改了我的代码，只是在选择网址路径上进行重定向而不是＆＃34; / *＆＃34;

 @Bean
  public EmbeddedServletContainerFactory servletContainer() {
    TomcatEmbeddedServletContainerFactory tomcat =
      new TomcatEmbeddedServletContainerFactory() {

        @Override
        protected void postProcessContext(Context context) {
          SecurityConstraint securityConstraint = new SecurityConstraint();
          securityConstraint.setUserConstraint("CONFIDENTIAL");
          SecurityCollection collection = new SecurityCollection();
          //used to be just collection.addPattern("/*"); now I changed it to specify which path I want it to redirect
          collection.addPattern("/mvchome/*");
          collection.addPattern("/home/*");
          securityConstraint.addCollection(collection);
          context.addConstraint(securityConstraint);
        }
      };
    tomcat.addAdditionalTomcatConnectors(createHttpConnector());
    return tomcat;
  }

Answer 1

http状态302通常是由错误的网址设置引起的。

首先，确保调用public ResponseEntity<List<Post>> getAllPosts() {}方法（只在其中打印List<Post>结果）。

如果它被正确调用，您可以在public ModelAndView getAll() {}内获得返回值。

问题应该是public ModelAndView getAll() {}方法的指示设置。

检查您的web.xml或spring配置是否出错。请注意重定向到视图的配置以及调度程序servlet的url映射。

如果调用public ResponseEntity<List<Post>> getAllPosts() {}但您无法获得返回值，那么应该是指导public ResponseEntity<List<Post>> getAllPosts() {}方法设置的问题。

检查你的spring配置和web.xml。可能的原因通常是在配置和web.xml中滥用通配符，或者只是忽略了错误的映射。

休息模板给出空体和状态302

1 个答案: