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servlet中request与response的用法

2016-03-19 19:42 615 查看
Servlet的接口与实现类:





其中request方法为:









response方法为:







具体实例如下:
JAVA代码为:

package shark.zd.servlets;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.Servlet;

import javax.servlet.ServletConfig;

import javax.servlet.ServletException;

import javax.servlet.ServletRequest;

import javax.servlet.ServletResponse;

public class WlecomeServlet
implements Servlet
{

/*

* 撤销前需要做的事情

*/

public void
destroy()
{

// TODO Auto-generated method stub

}

//获得配置信息

public ServletConfig getServletConfig()
{

// TODO Auto-generated method stub

return null;

}

public String getServletInfo()
{

// TODO Auto-generated method stub

return null;

}

//初始化

public void
init(ServletConfig arg0)
throws ServletException
{

// TODO Auto-generated method stub

}

//在Servlet中做的事情在这里去做

public void service(ServletRequest
request, ServletResponse response)

throws ServletException,
IOException {

System.out.println("welcome被执行了");

PrintWriter out
= response.getWriter();

request.getParameter("username");

String radio
= request.getParameter("testRadio");

out.print(radio+"

");

out.print(request.getParameter("sw")+"

");

String[] c
= request.getParameterValues("c1");

for(String str:c){

out.print(str+"

");

}

out.flush();

}

}

HTML代码为:

<!DOCTYPE
HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>test.html</title>

</head>

<body>

<form
action="wlecome">

请输入你的名字:<input
type="text"
name="username"
/></br>

<input
type="radio"
name="testRadio"
value="man">男</br>

<input
type="radio"
name="testRadio"
value="woman">女</br>

<select
name="sw">

<option
value="s">s</option>

<option
value="w">w</option>

</select>

<input
type="checkbox"
name="c1"
value="c1">

<input
type="checkbox"
name="c2"
value="c2">

<input
type="checkbox"
name="c3"
value="c3">

<input
type="checkbox"
name="c4"
value="c4">

<input
type="submit"
value="提交"
/>

</form>

</body>

</html>

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