使用Servlet处理业务逻辑

来源：互联网发布：javascript获取css属性编辑：程序博客网时间：2024/04/28 06:43

使用Servlet处理业务逻辑（DealServlet.java）：

package com.wgh.servlet;

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 DealServlet
*/
@WebServlet("/DealServlet")
public class DealServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
* @see HttpServlet#HttpServlet()
*/
public DealServlet() {
super();
}

// 处理POST请求
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html; charset=UTF-8");
// 获取name参数值
String name = request.getParameter("name");
// 从response中获取PrintWriter对象
PrintWriter writer = response.getWriter();
// 判断name是否为空
if (name != null) {
// 如果name不为空，则通过writer输出name
writer.write("Hello " + name + " !");
}
writer.flush(); // 刷新writer
writer.close(); // 关闭writer
}
}

用户提交的表单index.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>通过Servlet处理表单提交的请求</title>
</head>
<body>
<form action="DealServlet" method="post">
<p>请输入您的姓名：<input type="text" name="name"></p>
<p><input type="submit" value="提　交"/></p>
</form>
</body>
</html>

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