Question

如何使用RestTemplate发布到REST服务。我有以下RESTful Web服务，我想使用RestTemplate发布一个新的用户对象？

@Controller
@RequestMapping("/api")
class APIController
{

    private static final Logger logger = LoggerFactory.getLogger(APIController.class);

    private MappingJacksonJsonView  jsonView = new MappingJacksonJsonView();

    @RequestMapping(value = "/{id}", method = RequestMethod.POST)
    @ResponseBody
    public User updateCustomer(@PathVariable("id") String id, @RequestBody User user) {

        logger.debug("I am in the controller and got user name: " + user.toString());
        return user;
    }
}

如何更改以下代码以发布用户对象？

    RestTemplate rt = new RestTemplate(commons);
    rt.getMessageConverters().add(new MappingJacksonHttpMessageConverter());
    rt.getMessageConverters().add(new StringHttpMessageConverter());

    URI uri = new URI("http://" + mRESTServer.getHost() + ":8080/springmvc-rest-secured-test/api/2");

    User u = new User();
    u.setName("Johnathan M Smith");
    u.setUser("JMS");


    User returns = rt.postForObject(uri, u, User.class);

    LOGGER.debug("User:  " + u.toString());

以下是我得到的错误和输出：

    2013-06-18 08:11:36,819 [main] ERROR com.johnathanmarksmith.springresttemplate.Main - error:  <html><head><title>JBoss Web/7.0.13.Final - Error report</title><style><!--H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;} H3 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;} BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} B {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;} P {font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}A {color : black;}A.name {color : black;}HR {color : #525D76;}--></style> </head><body><h1>HTTP Status 400 - </h1><HR size="1" noshade="noshade"><p><b>type</b> Status report</p><p><b>message</b> <u></u></p><p><b>description</b> <u>The request sent by the client was syntactically incorrect ().</u></p><HR size="1" noshade="noshade"><h3>JBoss Web/7.0.13.Final</h3></body></html>
Exception in thread "main" org.codehaus.jackson.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
 at [Source: java.io.StringReader@71290aac; line: 1, column: 2]

Answer 1

我明白了......为RESTful服务编写用户对象的程序员没有

public User()
{
}

一旦添加到用户对象，一切正常..这不是客户端问题.. 它在服务器端

Answer 2

我注意到至少有两个问题：

第一个是您将请求发送到错误的网址。我们的控制器方法的请求映射如下：

@RequestMapping(value = "/user/{id}", method = RequestMethod.POST )

但是你发送请求到url：

"http://" + mRESTServer.getHost() + ":8080/springmvc-rest-secured-test/json/user/2"

你可能想要删除字符串＆＃39; json＆＃39;从路径。

第二个问题是你的控制器方法返回一个User对象但是当你调用postForObject()类的RestTemplate方法时，你声明控制器方法的返回类型为String。

您应该更改以下行：

String returns = rt.postForObject(uri, u, String.class);

为：

User returns = rt.postForObject(uri, u, User.class);

See the Javadoc of the RestTemplate class for more details about this

如何在Spring中使用RestTemplate发布到REST服务

2 个答案: