Error : UnsupportedClassVersionError: Bad version number in .class file
使用了以下 jar :
- 激活.jar
- asm-3.1.jar
- jackson-core-asl.jar
- jackson-jaxrs.jar
- jackson-mapper-asl.jar
- jackson-xc.jar
- jaxb-api-2.2.jar
- jersey-client-1.2.jar
- jersey-core.jar
- jersey-json.jar
- jersey-server-1.0.2.jar
- jettison-1.0.jar
- jsr311-api-1.1.1.jar
==================================================
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_2_4.xsd" version="2.4"> <display-name>com.rest</display-name>
<welcome-file-list><welcome-file>welcome.jsp</welcome-file>
<welcome-file>default.html</welcome-file></welcome-file-list>
<servlet>
<servlet-name>jersey-serlvet</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<init-param><param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>com.rest</param-value></init-param>
<init-param><param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name><param-value>true</param-value>
</init-param><load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>jersey-serlvet</servlet-name>
<url-pattern>/sevice/*</url-pattern>
</servlet-mapping>
</web-app>
======================================================
欢迎.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html><head><meta http-equiv="Content-Type" content="text/html;charset=ISO-8859-1">
<title>Tracks</title></head>
<body>
<form action="sevice/myMusic/post" method="post">
<pre>Song : <input type="text" name="newSong"></pre>
<pre>Singer : <input type="text" name="singer"></pre>
<input type="submit" value="Submit" />
</form>
</body>
</html>
========================================================= JSONService.java
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
@Path("/myMusic")
public class JSONService {
static MyDataSingleton singletonData= MyDataSingleton.getInstance();
Map<String, String> trackMap=new HashMap<String,String>();
@GET
@Path("/getAllTracks")
@Produces(MediaType.APPLICATION_JSON)
public Response getAllTracksInJSON() {
System.out.println("Gor Inside getAll");
if(isMapEmpy(singletonData.getSongsMap())){
return Response.status(400).entity("No track found in system. Please create your track list first !").build();
}
return Response.ok().entity(singletonData.getSongsMap()).build();
}
}
========================== Track.java
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Track {
String song;
String singer;
public String getSong() {
return song;
}
public void setSong(String song) {
this.song = song;
}
public String getSinger() {
return singer;
}
public void setSinger(String singer) {
this.singer = singer;
}
@Override
public String toString() {
return "Song [song=" + song + ", singer=" + singer + "]";
}
public String myStringConversion(){
return song+":"+singer;
}
}
最佳答案
存在 jar 版本不匹配的情况，包含的所有 jar 都必须符合 jersey 1.2 文档， dependencies list can be check here
关于java - 如何使用 Java 1.5 和 jersey 1.2 公开 RESTful Web 服务，.class 文件中的版本号错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42532963/