<分区>
当通过 html 表单调用我的 httpservlet 时，我不断收到此 URL 不支持 HTTP 方法 POST 的消息。我看不出哪里错了。我在 Tomcat 服务器上运行它。提前致谢。
servlet 应该向浏览器打印一组随机数。
这是我的 servlet:
package servlets;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.TreeSet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import utilities.RandNumSet;
public class RandomServlet extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = 1L;
public RandomServlet() {
// TODO Auto-generated constructor stub
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
doPost(req, resp);
}
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
PrintWriter out = resp.getWriter();
resp.setContentType("text/html");
TreeSet<Integer> randNum = RandNumSet.generateRandNumSet();
Iterator<Integer> iterator = randNum.iterator();
String numString = "";
while (iterator.hasNext()){
numString = numString + iterator.next() + " ";
}
out.println("<head>");
out.println("<title>");
out.println("Your Random Numbers!");
out.println("</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1> Your Random Numbers! </h1>");
out.println("<h1> "+ numString + " </h1>");
out.println("</body>");
}
}
这是调用 html 表单片段:
<div id ="form">
<form action="RandomServlet" method="post">
<input type="submit" value="Randomize!"/>
</form>
</div>
这是 web.xml 片段
<servlet>
<display-name>RandomServlet</display-name>
<servlet-name>RandomServlet</servlet-name>
<servlet-class>servlets.RandomServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>RandomServlet</servlet-name>
<url-pattern>/RandomServlet</url-pattern>
</servlet-mapping>
我正在使用以下方式及其工作方式......
首先:首先检查您创建的目录，例如-
com.ServletExample
|-JavaResource
|-src
|-com.servletExample
|-RandomServlet.java
|-WebContent
|-META-INF
|-WEB-INF
|-Lib
|-web.xml
|-index.jsp
第二个:index.jsp来了
<%@ 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>Insert title here</title>
</head>
<body>
<div id ="form">
<form action="RandomServlet" method="post">
<input type="submit" value="Randomize!"/>
</form>
</div>
</body>
</html>
第三:RendomServlet.java来了
package com.servletExample;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class RandomServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public RandomServlet() {
super();
}
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
response.setContentType("text/html");
out.println("<head>");
out.println("<title>");
out.println("Your Random Numbers!");
out.println("</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1> Your Random Numbers! </h1>");
out.println("<h1> " + "Hello" + " </h1>");
out.println("</body>");
}
}
第四:web.xml在这里
<?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"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>JSPExample</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<display-name>RandomServlet</display-name>
<servlet-name>RandomServlet</servlet-name>
<servlet-class>com.servletExample.RandomServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>RandomServlet</servlet-name>
<url-pattern>/RandomServlet</url-pattern>
</servlet-mapping>
</web-app>
我希望这会奏效。