📄 sessionexample.java

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💻 JAVA
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//SessionExample.java
import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

import util.HTMLFilter;

public class SessionExample extends HttpServlet {
	
    ResourceBundle rb = ResourceBundle.getBundle("LocalStrings");
    
    public void doGet(HttpServletRequest request,
		HttpServletResponse response)
        throws IOException, ServletException
    {
        response.setContentType("text/html");//设置类型
		
        PrintWriter out = response.getWriter();//获取输出流
        out.println("<html>");//HTML起始
        out.println("<body bgcolor=\"white\">");//设置颜色
        out.println("<head>");//设置头部
		
        String title = rb.getString("sessions.title");//设置标题
        out.println("<title>" + title + "</title>");//显示标题
        out.println("</head>");//头部结尾
        out.println("<body>");//实体部分

        out.println("<a href=\"../sessions.html\">");
        out.println("<img src=\"../images/code.gif\" height=24 " +
			"width=24 align=right border=0 alt=\"view code\"></a>");
        out.println("<a href=\"../index.html\">");
        out.println("<img src=\"../images/return.gif\" height=24 " +
			"width=24 align=right border=0 alt=\"return\"></a>");
		
        out.println("<h3>" + title + "</h3>");//文本大小信息
		
        HttpSession session = request.getSession(true);
        out.println(rb.getString("sessions.id") + " " + session.getId());
        out.println("<br>");
        out.println(rb.getString("sessions.created") + " ");
        out.println(new Date(session.getCreationTime()) + "<br>");
        out.println(rb.getString("sessions.lastaccessed") + " ");
        out.println(new Date(session.getLastAccessedTime()));
		
        String dataName = request.getParameter("dataname");//获得输出信息
        String dataValue = request.getParameter("datavalue");
        if (dataName != null && dataValue != null) {
            session.setAttribute(dataName, dataValue);
        }
		
        out.println("<P>");
        out.println(rb.getString("sessions.data") + "<br>");
        Enumeration names = session.getAttributeNames();
        while (names.hasMoreElements()) {
            String name = (String) names.nextElement(); 
            String value = session.getAttribute(name).toString();
            out.println(HTMLFilter.filter(name) + " = " 
				+ HTMLFilter.filter(value) + "<br>");
        }
		
        out.println("<P>");
        out.print("<form action=\"");//设置表格
		out.print(response.encodeURL("SessionExample"));
        out.print("\" ");
        out.println("method=POST>");//帮定到一个方法函数
        out.println(rb.getString("sessions.dataname"));
        out.println("<input type=text size=20 name=dataname>");
        out.println("<br>");
        out.println(rb.getString("sessions.datavalue"));
        out.println("<input type=text size=20 name=datavalue>");设置大小，数据类型
        out.println("<br>");
        out.println("<input type=submit>");设置表格类型为输入信息框
        out.println("</form>");//表格结尾
		
        out.println("<P>GET based form:<br>");
        out.print("<form action=\"");
		out.print(response.encodeURL("SessionExample"));
        out.print("\" ");
        out.println("method=GET>");//设置方法
        out.println(rb.getString("sessions.dataname"));
        out.println("<input type=text size=20 name=dataname>");
        out.println("<br>");
        out.println(rb.getString("sessions.datavalue"));
        out.println("<input type=text size=20 name=datavalue>");
        out.println("<br>");
        out.println("<input type=submit>");设置按钮
        out.println("</form>");表格结尾
		
        out.print("<p><a href=\"");
		out.print(response.encodeURL("SessionExample?dataname=foo&datavalue=bar"));
		out.println("\" >URL encoded </a>");
		
        out.println("</body>");
        out.println("</html>");
        
        out.println("</body>");//实体结尾
        out.println("</html>");//HTML结尾
    }
	
    public void doPost(HttpServletRequest request,
		HttpServletResponse response)
        throws IOException, ServletException
    {
        doGet(request, response);//调用函数
    }
	
}
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