我想使用POST方法使用Spring Rest web服务。我无法在客户端(网站)访问POJO文件，因此必须在客户端使用JSON并在Web服务中使用POJO。下面是我的代码：获取400错误的请求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客户

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();

}

正如你在评论中看到的那样，我尝试了很多选择但没有成功。

堆栈跟踪

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)

编辑 我曾测试REST Web服务http://localhost:8181/xyz/updateAdmin 使用邮差，并且它成功执行，但不与RestTemplate工作。

问题解决 请参阅下面的答案。

+0

我也有使用RestTemplate的方法postForObject错误请求400。原因是在我的pojo，我没有使用@JsonProperty来注释每个字段。基本上，在修复之前，Pojo的内容没有被发送到端点。如果您在邮递员中删除了json请求的主体，则验证了这一点。发送一个空的身体也给你一个400.这是线索，然后在pojo狭窄。 –