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// instanceconcurrenttest.jsp<%@ page contentType="text/html;charset=GBK" %><%! //定義實(shí)例變量 String username; String passWord; java.io.PRintWriter output;%><% //從request中獲取參數(shù) username = request.getParameter("username"); password = request.getParameter("password"); output = response.getWriter(); showUserInfo(); %> <%! public void showUserInfo() { //為了突出并發(fā)問題,在這兒首先執(zhí)行一個(gè)費(fèi)時(shí)操作 int i =0; double sum = 0.0; while (i++ < 200000000) { sum += i; } output.println(Thread.currentThread().getName() + "<br>"); output.println("username:" + username + "<br>"); output.println("password:" + password + "<br>"); } %>
// InstanceConcurrentTest.javaimport javax.servlet.*;import javax.servlet.http.*;import java.io.PrintWriter;public class InstanceConcurrentTest extends HttpServlet { String username; String password; PrintWriter out; public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,java.io.IOException { //從request中獲取參數(shù) username = request.getParameter("username"); password = request.getParameter("password"); System.out.println(Thread.currentThread().getName() + " | set username:" + username); out = response.getWriter(); showUserInfo(); } public void showUserInfo() { //為了突出并發(fā)問題,在這兒首先執(zhí)行一個(gè)費(fèi)時(shí)操作 int i =0; double sum = 0.0; while (i++ < 200000000) { sum += i; } out.println("thread:" + Thread.currentThread().getName()); out.println("username:"+ username); out.println("password:" + password); }}
<%@ page contentType="text/html;charset=GBK" %><% //使用局部變量 String username; String password; java.io.PrintWriter output; //從request中獲取參數(shù) username = request.getParameter("username"); password = request.getParameter("password"); output = response.getWriter(); showUserInfo(output, username, password);%><%! public void showUserInfo(java.io.PrintWriter _output, String _username, String _password) { //為了突出并發(fā)問題,在這兒首先執(zhí)行一個(gè)費(fèi)時(shí)操作 int i =0; double sum = 0.0; while (i++ < 200000000) { sum += i; } _output.println(Thread.currentThread().getName() + "<br>"); _output.println("username:" + _username + "<br>"); _output.println("password:" + _password + "<br>"); }%>
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