我试图通过以下教程,但我一直收到错误消息: https://www.tutorialspoint.com/restful/restful_first_application.htm
当我尝试访问以下链接时,我收到HTTP状态500 - 间隔服务器错误: http://localhost:8080/NoteMandatory/rest/NoteService/notes
这是我得到的错误说明: org.glassfish.jersey.message.internal.WriterInterceptorExecutor $ TerminalWriterInterceptor aroundWriteTo SEVERE:找不到媒体类型= application / xml的MessageBodyWriter,type = class java.util.ArrayList,genericType = java.util.List。
项目文件夹:
Note.java:
package com.note;
import java.io.Serializable;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement(name = "note")
public class Note implements Serializable {
private static final long serialVersionUID = 1L;
private int id;
private String title;
private String text;
public Note(){
}
public Note(int id, String title, String text){
this.id = id;
this.title = title;
this.text = text;
}
//Getters
public int getId() {
return id;
}
public String getTitle() {
return title;
}
public String getText() {
return text;
}
//Setters
@XmlElement
public void setId(int id) {
this.id = id;
}
@XmlElement
public void setTitle(String title) {
this.title = title;
}
@XmlElement
public void setText(String text) {
this.text = text;
}
}
NoteDataAccess.java:
public class NoteDataAccess {
public List<Note> getAllNotes(){
List<Note> noteList = null;
try {
File file = new File("Notes.dat");
if (!file.exists()) {
Note note = new Note(1, "Remember this", "Buy milk and do homework");
noteList = new ArrayList<Note>();
noteList.add(note);
saveNoteList(noteList);
}else{
FileInputStream fis = new FileInputStream(file);
ObjectInputStream ois = new ObjectInputStream(fis);
noteList = (List<Note>) ois.readObject();
ois.close();
}
} catch (IOException e) {
e.printStackTrace();
System.out.println("NoteDataAccess_getAllNotes Exception 1");
} catch (ClassNotFoundException e) {
e.printStackTrace();
System.out.println("NoteDataAccess_getAllNotes Exception 2");
}
return noteList;
}
private void saveNoteList(List<Note> noteList){
try {
File file = new File("Notes.dat");
FileOutputStream fos;
fos = new FileOutputStream(file);
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(noteList);
oos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
System.out.println("NoteDataAccess_saveNoteList Exception 1");
} catch (IOException e) {
e.printStackTrace();
System.out.println("NoteDataAccess_saveNoteList Exception 2");
}
}
}
NoteService.java:
package com.note;
import java.io.IOException;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.Consumes;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.xml.bind.annotation.XmlElement;
import org.apache.tomcat.jni.User;
@Path("/NoteService")
public class NoteService {
NoteDataAccess theNoteDataAccess = new NoteDataAccess();
@GET
@Path("/notes")
@Produces(MediaType.APPLICATION_XML)
public List<Note> getNotes(){
return theNoteDataAccess.getAllNotes();
}
}
的web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>NoteMandatory</display-name>
<servlet>
<servlet-name>Jersey RESTful Application</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>com.note</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>Jersey RESTful Application</servlet-name>
<url-pattern>/rest/*</url-pattern>
</servlet-mapping>
</web-app>
答案 0 :(得分:0)
我认为问题在于您将列表返回到XML格式。泽西有麻烦,你想用GenericEntity包装它:
/* jshint node: true */
module.exports = function(environment) {
var ENV = {
modulePrefix: 'alpha',
podModulePrefix: 'alpha/pods',
environment: environment,
rootURL: '/',
locationType: 'auto',
EmberENV: {
FEATURES: {
// Here you can enable experimental features on an ember canary build
// e.g. 'with-controller': true
},
EXTEND_PROTOTYPES: {
// Prevent Ember Data from overriding Date.parse.
Date: false
}
},
APP: {
// Here you can pass flags/options to your application instance
// when it is created
}
};
ENV['ember-simple-auth'] = {
authorizer: 'authorizer:session'
};
if (environment === 'development') {
// ENV.APP.LOG_RESOLVER = true;
// ENV.APP.LOG_ACTIVE_GENERATION = true;
// ENV.APP.LOG_TRANSITIONS = true;
// ENV.APP.LOG_TRANSITIONS_INTERNAL = true;
// ENV.APP.LOG_VIEW_LOOKUPS = true;
}
if (environment === 'test') {
// Testem prefers this...
ENV.locationType = 'none';
// keep test console output quieter
ENV.APP.LOG_ACTIVE_GENERATION = false;
ENV.APP.LOG_VIEW_LOOKUPS = false;
ENV.APP.rootElement = '#ember-testing';
}
if (environment === 'production') {
}
return ENV;
};
请参阅this SO Question。