Http狀態500返回上Spring MVC的使用REST模板和JSON響應格式

我的項目包括那些四個表如下：Http狀態500返回上Spring MVC的使用REST模板和JSON響應格式

問題 - Question_id，問題文本
用戶 - USER_ID，名稱
Question_Answer - 用戶名，Question_ID，答案
QuestionType - QuestionID，標籤

我有一個基於多標籤

或者乾脆返回所有問題的列表（當沒有標籤提供）

或插入由用戶提供的到答案的生成問題問題_答案表。

控制器類SpringServiceController.java（生成結果JSON格式）如下：

package com.bargadss.SpringService.Controller; 

import java.text.ParseException; 
import java.util.List; 

import org.springframework.web.bind.annotation.PathVariable; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.bind.annotation.RequestMethod; 
import org.springframework.web.bind.annotation.RestController; 

import com.bargadss.SpringService.DAO.QuestionService; 
import com.bargadss.SpringService.Domain.*; 


@RestController 

@RequestMapping("/service/question/") 
public class SpringServiceController { 
    QuestionService questionService=new QuestionService(); 

@RequestMapping(value = "/{tag1},{tag2},{tag3}", method = RequestMethod.GET,headers="Accept=application/json") 
public List<Questions> getQuestions(@PathVariable("tag1") String tag1, @PathVariable("tag2") String tag2, @PathVariable("tag3") String tag3) { 
    List<Questions> Qobj=questionService.getQuestionByTag(tag1, tag2, tag3); 
    return Qobj; 
} 

@RequestMapping(method = RequestMethod.GET,headers="Accept=application/json") 
public List<Questions> getAllQuestions() { 
    List<Questions> Qobj=questionService.getAllQuestion(); 
    return Qobj; 
} 

@RequestMapping(value="/insert/{user_id}/{question_id}/{answer}",method = RequestMethod.POST,headers="Accept=application/json") 
    public List<Questions> addQuestions(@PathVariable int user_id,@PathVariable int question_id,@PathVariable String answer) throws ParseException { 
     Question_Answer qtnAns = new Question_Answer(); 
     qtnAns.setUser_id(user_id); 
     qtnAns.setQuestion_id(question_id); 
     qtnAns.setAnswer(answer); 
     questionService.insertAnswer(qtnAns.getUser_id(), qtnAns.getQuestion_id(), qtnAns.getAnswer()); 
     return questionService.getAllQuestion();   
    }   
    }

的ListQuestionController.java使用Spring REST temaplate（生成JSP頁）如下：

package com.bargadss.SpringService.Controller; 

import java.util.LinkedHashMap; 
import java.util.List; 

import org.springframework.stereotype.Controller; 
import org.springframework.web.bind.annotation.PathVariable; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.client.RestTemplate; 
import org.springframework.web.servlet.ModelAndView; 

import com.bargadss.SpringService.Domain.*; 

@Controller 
public class ListQuestionController { 

@RequestMapping("/listQuestion/{tag1},{tag2},{tag3}") 
    public ModelAndView listQuestions(@PathVariable("tag1") String Tag1, @PathVariable("tag2") String Tag2, @PathVariable("tag3") String Tag3) { 
     RestTemplate restTemplate = new RestTemplate(); 
     String url="http://localhost:8080/FetchQuestions/service/question/{tag1},{tag2},{tag3}"; 
     List<LinkedHashMap> Qobj=restTemplate.getForObject(url, List.class,Tag1,Tag2,Tag3); 
     return new ModelAndView("listQuestion", "questions", Qobj); 
    } 

@RequestMapping("/listAllQuestion/") 
    public ModelAndView listAllQuestion() { 
     RestTemplate restTemplate = new RestTemplate(); 
     String url="http://localhost:8080/FetchQuestions/service/question/"; 
     List<LinkedHashMap> Qobj=restTemplate.getForObject(url, List.class); 
     return new ModelAndView("listQuestion", "questions", Qobj); 
    } 

@RequestMapping("/insertQuestionAnswer/{user_id}/{qtn_id}/{answer}") 
    public ModelAndView insertQuestionAnswer(@PathVariable("user_id") String user_ID, 
      @PathVariable("qtn_id") String qtn_ID, @PathVariable("answer") String answer) { 
     RestTemplate restTemplate = new RestTemplate(); 
     String url="http://localhost:8080/FetchQuestions/service/question/insert/{user_id}/{qtn_id}/{answer}"; 
     List<LinkedHashMap> Qobj=restTemplate.getForObject(url, List.class,user_ID,qtn_ID,answer); 
     return new ModelAndView("listQuestion", "questions", Qobj); 
    } 

    }

的QuestionService.java類執行DAO活性如下：

package com.bargadss.SpringService.DAO; 

import java.sql.Connection; 
import java.sql.PreparedStatement; 
import java.sql.ResultSet; 
import java.sql.SQLException; 
import java.sql.Statement; 
import java.text.ParseException; 
import java.util.ArrayList; 
import java.util.List; 
import com.bargadss.SpringService.Domain.*; 
import com.bargadss.SpringService.Utility.DBUtility; 


public class QuestionService { 

private Connection connection; 

public QuestionService() { 
    connection = DBUtility.getConnection(); 
} 

public void insertAnswer(int userId,int qtnId,String answer){ 
    //Question_Answer objQA = new Question_Answer(); 
    PreparedStatement preparedStatement = null; 
    try{ 
     preparedStatement = connection.prepareStatement("insert into question_answer values (?,?,?)"); 
     preparedStatement.setInt(1, userId); 
     preparedStatement.setInt(2, qtnId); 
     preparedStatement.setString(3, answer); 
     int result = preparedStatement.executeUpdate(); 
     if(result == 0) 
      System.out.println("INSERTION OF DATA FAILED"); 
    } catch (SQLException e){ 
     e.printStackTrace(); 
    } 
    finally{ 
     try { if (preparedStatement != null) preparedStatement.close(); } catch (Exception e) {System.out.println("Exception Closing The Prepared Statement");e.printStackTrace();}; 
    } 
} 

public List<Questions> getAllQuestion(){ 
    Questions objQ = new Questions(); 
    ResultSet rs = null; 
    PreparedStatement preparedStatement = null; 
    List<Questions> qtns = new ArrayList<Questions>(); 
    try { 
      preparedStatement = connection.prepareStatement("select * from questions");    
      rs = preparedStatement.executeQuery(); 

      while(rs.next()) { 
      objQ.setQuestion_id(Integer.parseInt(rs.getString("Question_id"))); 
      objQ.setQuestion_text(rs.getString("Question_Text")); 
      qtns.add(objQ); 
      } 
    } catch (SQLException e) { 
      e.printStackTrace(); 
     }  
     finally{ 
      try { if (rs != null) rs.close(); } catch (Exception e) {System.out.println("Exception Closing The result Set");e.printStackTrace();}; 
      try { if (preparedStatement != null) preparedStatement.close(); } catch (Exception e) {System.out.println("Exception Closing The Prepared Statement");e.printStackTrace();}; 
      /*try { if (connection != null) connection.close(); } catch (Exception e) {System.out.println("Exception Closing The Connection");e.printStackTrace();};*/ 
     } 
    return qtns; 
} 

public List<Questions> getQuestionByTag(String Tag1,String Tag2,String Tag3){  
    Questions objQ = new Questions(); 
    ResultSet rs = null; 
    PreparedStatement preparedStatement = null; 
    List<Questions> qtns = new ArrayList<Questions>(); 
    try { 
      preparedStatement = connection. 
      prepareStatement("select questions.Question_id,questions.Question_Text from questions,questiontype " + 
          "where questions.Question_id=questiontype.Question_id " + 
          "and questiontype.Tag in (?,?,?)"); 
      preparedStatement.setString(1, Tag1); 
      preparedStatement.setString(2, Tag2); 
      preparedStatement.setString(3, Tag3); 
      rs = preparedStatement.executeQuery(); 

      while(rs.next()) { 
      objQ.setQuestion_id(Integer.parseInt(rs.getString("Question_id"))); 
      objQ.setQuestion_text(rs.getString("Question_Text")); 
      qtns.add(objQ); 
      } 
    } catch (SQLException e) { 
      e.printStackTrace(); 
     }  
     finally{ 
      try { if (rs != null) rs.close(); } catch (Exception e) {System.out.println("Exception Closing The result Set");e.printStackTrace();}; 
      try { if (preparedStatement != null) preparedStatement.close(); } catch (Exception e) {System.out.println("Exception Closing The Prepared Statement");e.printStackTrace();}; 
      /*try { if (connection != null) connection.close(); } catch (Exception e) {System.out.println("Exception Closing The Connection");e.printStackTrace();};*/ 
     } 
    return qtns; 
} 

}

上，使用下列URL的項目（的Apache Tomcat 7.0.12）執行它產生HTTP狀態500

http://localhost:8080/FetchQuestions/insertQuestionAnswer/3/9/True

而且當我執行它產生以下網址HTTP狀態405 - 不支持請求方法'GET'

http://localhost:8080/FetchQuestions/service/question/insert/3/9/True

我做錯了什麼？我錯過了什麼嗎？

堆棧跟蹤HTTP狀態500是如下：

重度：Servlet.service（）進行的servlet [其餘]與路徑上下文[/ FetchQuestions]拋出異常[請求處理失敗;嵌套異常是org.springframework.web.client.HttpClientErrorException：405方法不允許]與根本原因 org.springframework.web.client.HttpClientErrorException：405方法不允許 at org.springframework.web.client.DefaultResponseErrorHandler.handleError（ DefaultResponseErrorHandler.java:91）在org.springframework.web.client.RestTemplate.handleResponseError（RestTemplate.java:576）在org.springframework.web.client.RestTemplate.doExecute（RestTemplate.java:532）的組織。 springframework.web.client.RestTemplate.execute（RestTemplate。java：489） at org.springframework.web.client.RestTemplate.getForObject（RestTemplate.java:226） at com.bargadss.SpringService.Controller.ListQuestionController.insertQuestionAnswer（ListQuestionController.java:47） at sun.reflect。 NativeMethodAccessorImpl.invoke0（本機方法）在sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:57）在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke （Method.java:606） at org.springframework.web.method.support.InvocableHandlerMethod.invoke（InvocableHandlerMethod.java:214） at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest（InvocableHandlerMethod.java:132 ）在org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle（ServletInvocableHandlerMethod.java:104）在org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod（RequestMappingHandlerAdapter.java： 748）在org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal（RequestMappingHandlerAdapter.java:689）在org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle（AbstractHandlerMethodAdapter.java： 83）在org.springframework.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:945）在org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:876）在org.springframework.web。 servlet.FrameworkServlet.processR eQUEST的（FrameworkServlet.java:931）在org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:822）在javax.servlet.http.HttpServlet.service（HttpServlet.java:621）在有機springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:807） at javax.servlet.http.HttpServlet.service（HttpServlet.java:722） at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain。的java：304）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:210）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:240）在org.apache。 catalina.core.StandardContextValve.invoke（StandardContextValve.java:164） a噸org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:462）在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:164）在org.apache.catalina.valves.ErrorReportValve .invoke（ErrorReportValve.java:100） at org.apache.catalina.valves.AccessLogValve.invoke（AccessLogValve.java:562） at org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:118）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:395）在org.apache.coyote.http11.Http11Processor.process（Http11Processor.java:250）在org.apache.coyote.http11.Http11Protocol $ Http11ConnectionHandler.process（Http11Protocol.java:188） at org.apache.coyote.http11.Http11Protocol $ Http11ConnectionHandler .process（Http11Protocol.java:166） at org.apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run（JIoEndpoint.java:302） at java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1145 ） at java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:615） at java.lang.Thread.run（Thread。Java的：745）

來源

2014-10-28 Arindam Das

您是否使用斷點進行調試？ – Sreek521 2014-10-28 11:32:49

是的，我打破了守則並測試了它。 – 2014-10-28 11:33:44

請問您可以添加堆棧跟蹤 – Sreek521 2014-10-28 11:50:29

而且當我執行它生成HTTP狀態405以下網址 - 請求方法 'GET' 不支持

變化從POST到GETSpringServiceController.SpringServiceController方法的請求方法。它應該可以解決你的問題。

@RequestMapping(value="/insert/{user_id}/{question_id}/{answer}",method = RequestMethod.GET,headers="Accept=application/json")

來源

2014-10-28 12:02:50

Http狀態500返回上Spring MVC的使用REST模板和JSON響應格式

回答

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