Servlet 教程 之 Servlet 表单数据 6
Servlet 表单数据
使用表单的 POST 方法实例
让我们对上面的 Servlet 做小小的修改,以便它可以处理 GET 和 POST 方法。下面的 HelloForm.java Servlet 程序使用 GET 和 POST 方法处理由 Web 浏览器给出的输入。
注意:如果表单提交的数据中有中文数据则需要转码:
String name =new String(request.getParameter("name").getBytes("ISO8859-1"),"UTF-8");
package com.baidu.test;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
Servlet implementation class HelloForm
*/
@WebServlet("/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);
}
}
现在,编译部署上述的 Servlet,并使用带有 POST 方法的 hello.html 进行测试,如下所示:
<!DOCTYPE html>
网址名:
网址:
下面是上面表单的实际输出,尝试输入网址名和网址,然后点击"提交"按钮