我想使用POST方法使用Spring Rest web服務。我無法在客戶端(網站)訪問POJO文件，因此必須在客戶端使用JSON并在Web服務中使用POJO。下面是我的代碼：獲取400錯誤的請求Spring RestTemplate POST

REST控制器

@RequestMapping(value="/updateAdmin", method=RequestMethod.POST, consumes="application/json", headers="Accept=application/json")

public ResponseEntity updateAdmin(@RequestBody Ss_admin admin) {

try {

ss_admin_dao.updateAdmin(admin);

} catch(Exception ex) {

ex.printStackTrace();

}

return new ResponseEntity(HttpStatus.CREATED);

}

POJO

package model;

import java.io.Serializable;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;

import com.fasterxml.jackson.annotation.JsonProperty;

@JsonIgnoreProperties(ignoreUnknown = true)

public class Ss_admin implements Serializable {

@JsonProperty("a_id")

private long a_id;

@JsonProperty("a_username")

private String a_username;

@JsonProperty("a_password")

private String a_password;

public Ss_admin() {}

public long getA_id() {

return a_id;

}

public void setA_id(long a_id) {

this.a_id = a_id;

}

public String getA_username() {

return a_username;

}

public void setA_username(String a_username) {

this.a_username = a_username;

}

public String getA_password() {

return a_password;

}

public void setA_password(String a_password) {

this.a_password = a_password;

}

}

REST客戶

try {

RestTemplate restTemplate = new RestTemplate();

List> list = new ArrayList>();

list.add(new MappingJackson2HttpMessageConverter());

restTemplate.setMessageConverters(list);

//restTemplate.setRequestFactory(new HttpComponentsClientHttpRequestFactory(HttpClientBuilder.create().build()));

String url = "http://localhost:8181/xyz/updateAdmin";

JSONArray json = new JSONArray();

JSONObject obj = new JSONObject();

obj.put("a_username", "testabcd");

obj.put("a_id", 1);

obj.put("a_password", "N/A");

json.put(obj);

HttpHeaders headers = new HttpHeaders();

//headers.setContentType(MediaType.APPLICATION_JSON);

//headers.setAccept(MediaType.APPLICATION_JSON);

headers.add("Accept", MediaType.APPLICATION_JSON.toString());

headers.add("Content-Type", MediaType.APPLICATION_JSON.toString());

//headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));

HttpEntity entity = new HttpEntity(obj.toString(), headers);

restTemplate.exchange(url, HttpMethod.POST, entity, String.class);

//restTemplate.postForEntity(url, entity, String.class);

} catch(Exception ex) {

ex.printStackTrace();

}

正如你在評論中看到的那樣，我嘗試了很多選擇但沒有成功。

堆棧跟蹤

Aug 04, 2017 6:58:12 PM org.springframework.web.client.RestTemplate handleResponseError

WARNING: POST request for "http://localhost:8181/xyz/updateAdmin" resulted in 400 (Bad Request); invoking error handler

org.springframework.web.client.HttpClientErrorException: 400 Bad Request

at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:91)

at org.springframework.web.client.RestTemplate.handleResponseError(RestTemplate.java:576)

at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:532)

at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:489)

at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:431)

at webcontroller.TestController.update(TestController.java:77)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214)

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:748)

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:931)

at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:822)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)

at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)

at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

at java.lang.Thread.run(Thread.java:745)

編輯 我曾測試REST Web服務http://localhost:8181/xyz/updateAdmin 使用郵差，并且它成功執行，但不與RestTemplate工作。

問題解決 請參閱下面的答案。

+0

我也有使用RestTemplate的方法postForObject錯誤請求400。原因是在我的pojo，我沒有使用@JsonProperty來注釋每個字段。基本上，在修復之前，Pojo的內容沒有被發送到端點。如果您在郵遞員中刪除了json請求的主體，則驗證了這一點。發送一個空的身體也給你一個400.這是線索，然后在pojo狹窄。 –

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