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servlet_06 使用表单的POST方法实例

2017-01-16 14:25 323 查看

下面的Servlet程序使用GET方法和POST方法处理由web浏览器给出的输入

注意：如果提交的表单中有中文则需要转码：

String name=new String(request.getParameter("name").getBytes("ISO8859-1"),"UTF-8");

HelloForm.java:

package MyServlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.io.IOException;

/**
* Created by 1192126986 on 2017/1/16.
*/
@WebServlet(name = "HelloForm")
public class HelloForm extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
* @see HttpServlet#HttpServlet()
*/
public HelloForm() {
super();
// TODO Auto-generated constructor stub
}

/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// 设置响应内容类型
response.setContentType("text/html;charset=UTF-8");

PrintWriter out = response.getWriter();
String title = "使用 POST 方法读取表单数据";
// 处理中文
String name =new String(request.getParameter("name").getBytes("ISO8859-1"),"UTF-8");
String docType = "<!DOCTYPE html> \n";
out.println(docType +
"<html>\n" +
"<head><title>" + title + "</title></head>\n" +
"<body bgcolor=\"#f0f0f0\">\n" +
"<h1 align=\"center\">" + title + "</h1>\n" +
"<ul>\n" +
" <li><b>站点名</b>："
+ name + "\n" +
" <li><b>网址</b>："
+ request.getParameter("url") + "\n" +
"</ul>\n" +
"</body></html>");
}

// 处理 POST 方法请求的方法
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
}

web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">

<servlet>
<servlet-name>HelloForm</servlet-name>
<servlet-class>MyServlet.HelloForm</servlet-class>
</servlet>

<servlet-mapping>
<servlet-name>HelloForm</servlet-name>
<url-pattern>/HelloForm</url-pattern>
</servlet-mapping>
</web-app>

hello.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>
<form action="HelloForm" method="POST">
网址名：<input type="text" name="name">
<br />
网址：<i
4000
nput type="text" name="url" />
<input type="submit" value="提交" />
</form>
</body>
</html>

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