从客户端到Java Servlet的GET / POST请求中找不到404错误 [英] 404 Not Found Error on GET/POST Request from Client to Java Servlet
问题描述
我在通过jquery从html页面向我的java servlet .class文件发送GET请求时收到404错误（在Web浏览器控制台中）。
I am receiving a 404 error (in the web browser console) upon sending a GET request from an html page via jquery to my java servlet .class file.
老实说，在我的IntelliJ maven-webapp项目中创建核心文件之后，我不知道该怎么做：
I honestly don't know what I should be doing after creating the core files in my IntelliJ maven-webapp project:
pom.xml, MyTestServlet.class, web.xml, index.html, do.js
我正在构建我的通过以下方式投影到名为target的文件夹：
I am building my project to a folder called "target" via:
构建>构建工件>>所有工件>构建
Build > Build Artifacts >> All Artifacts > Build
然后，我将目标中的所有文件上传到我部门的服务器，但当我导航到index.html并单击按钮时，它返回404 GET请求上的错误，而不是打印出servlet中指定的文本。
And then, I take all the files in target and upload them to my department's server, but when I navigate to index.html and click the button, it returns a 404 error on the GET request instead of printing out the text specified in the servlet.
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Created by isardar on 7/11/2017.
*
* GOAL FOR THIS TEST:
*
* make a servlet that sends data to client and client should receive/process the data
*
*/
//@WebServlet("/MyTestServlet") <-- idk what i'm doing
public class MyTestServlet extends HttpServlet {
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doGet(request,response);
}
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String text = "some text boiii";
response.setContentType("text/plain"); // Set content type of the response so that jQuery knows what it can expect.
response.setCharacterEncoding("UTF-8"); // You want world domination, huh?
response.getWriter().write(text); // Write response body.
}
}
index.html文件：
"index.html" File:
<!DOCTYPE html>
<html lang="en">
<head>
<title>SO question 4112686 - Copied & Tweaked Version</title>
<link rel="stylesheet" href="style.css"/>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script src="do.js"></script>
</head>
<body>
<button id="somebutton">press here</button>
<div id="somediv"></div>
</body>
</html>
do.js文件：
"do.js" File:
/**
* Created by isardar on 7/11/2017.
*/
$(document).on("click", "#somebutton", function() { // When HTML DOM "click" event is invoked on element with ID "somebutton", execute the following function...
$.get("WEB-INF\\classes\\ServerTest.class", function(responseText) { // Execute Ajax GET request on URL of "someservlet" and execute the following function with Ajax response text...
$("#somediv").text(responseText); // Locate HTML DOM element with ID "somediv" and set its text content with the response text.
});
});
web.xml文件：
"web.xml" File:
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<servlet>
<servlet-name>ServletTest</servlet-name>
<servlet-class>MyTestServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ServletTest</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
</web-app>
pom.xml文件：
"pom.xml" File:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>ServletTest4</groupId>
<artifactId>ServletTest4</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>ServletTest4 Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<!-- a default maven-web-app dependency for some reason... -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.0-b07</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>ServletTest4</finalName>
</build>
</project>
有人可以指导我应该改变什么为了完成这项工作，我觉得我非常接近解决方案吗？另请告诉我，如果有更好的方法来解决这个问题，我已经简要地听说过web servlet 3.0但是找不到任何关于IntellliJ和Maven的好资源。谢谢！
Can someone guide me as to what I should change to make this work, I feel I am quite close to a solution here? Also let me know if there are better ways about going about this problem, I have briefly heard of web servlet 3.0 but could not find any good resources on it for IntellliJ and Maven. Thanks!
推荐答案
正如CrazyCoder所指出的那样，我的问题是在do。中的jquery.get（...。 jsfile。应该是：
As CrazyCoder pointed out, my problem was at "jquery.get(..." in the "do.js" file. It should be:
$。get（WEB-INF\\classes \\ MyTestServer.class ...
而不是：
$ .get（WEB-INF \\classes \\ServerTest.class...
这只是一个简单的拼写错误！
It's just a simple typo!
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