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servlet中實現請求轉發,用戶登錄,在servlet中驗證用戶名和密碼.

代碼片段和文件信息
package?com.lh.servlet;
import?java.io.IOException;
import?java.io.PrintWriter;
import?javax.servlet.ServletException;
import?javax.servlet.http.HttpServlet;
import?javax.servlet.http.HttpServletRequest;
import?javax.servlet.http.HttpServletResponse;
public?class?ForwardServlet?extends?HttpServlet?{
public?ForwardServlet()?{
super();
}
public?void?destroy()?{
super.destroy();?
}
/**
?*?The?doGet?method?of?the?servlet.?
?*
?*?This?method?is?called?when?a?form?has?its?tag?value?method?equals?to?get.
?*?
?*?@param?request?the?request?send?by?the?client?to?the?server
?*?@param?response?the?response?send?by?the?server?to?the?client
?*?@throws?ServletException?if?an?error?occurred
?*?@throws?IOException?if?an?error?occurred
?*/
public?void?doGet(HttpServletRequest?request?HttpServletResponse?response)
throws?ServletException?IOException?{
this.doPost(request?response);
}
/**
?*?The?doPost?method?of?the?servlet.?
?*
?*?This?method?is?called?when?a?form?has?its?tag?value?method?equals?to?post.
?*?
?*?@param?request?the?request?send?by?the?client?to?the?server
?*?@param?response?the?response?send?by?the?server?to?the?client
?*?@throws?ServletException?if?an?error?occurred
?*?@throws?IOException?if?an?error?occurred
?*/
public?void?doPost(HttpServletRequest?request?HttpServletResponse?response)
throws?ServletException?IOException?{
request.setCharacterEncoding(“UTF-8“); //設置請求數據的字符編碼格式
String?name?=?request.getParameter(“name“);?//獲得請求表單中的用戶名
String?pwd?=?request.getParameter(“pwd“); //獲得請求表單中的密碼
if((name!=null&&!name.equals(““))&&(pwd!=null&&!pwd.equals(““))){
if(name.equals(“mr“)&&pwd.equals(“123“)){
//使用RequestDispatcher對象將頁面請求轉發到success.jsp頁
request.getRequestDispatcher(“success.jsp“).forward(request?response);
}else{
request.getRequestDispatcher(“error.jsp“).forward(request?response);
}
}
}
/**
?*?Initialization?of?the?servlet.?
?*
?*?@throws?ServletException?if?an?error?occurs
?*/
public?void?init()?throws?ServletException?{
//?Put?your?code?here
}
}
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2012-07-15?19:47??01\
?????文件?????????362??2010-11-18?14:41??01\.classpath
?????目錄???????????0??2012-07-15?19:47??01\.myeclipse\
?????文件?????????279??2012-07-15?19:47??01\.myme
?????文件????????1408??2010-11-18?14:41??01\.project
?????目錄???????????0??2012-07-15?19:47??01\.settings\
?????文件?????????500??2010-11-18?14:41??01\.settings\.jsdtscope
?????文件??????????49??2010-11-18?14:41??01\.settings\org.eclipse.wst.jsdt.ui.superType.container
?????文件???????????6??2010-11-18?14:41??01\.settings\org.eclipse.wst.jsdt.ui.superType.name
?????目錄???????????0??2012-07-15?19:47??01\src\
?????目錄???????????0??2012-07-15?19:47??01\src\com\
?????目錄???????????0??2012-07-15?19:47??01\src\com\lh\
?????目錄???????????0??2012-07-15?19:47??01\src\com\lh\servlet\
?????文件????????2235??2012-07-15?20:12??01\src\com\lh\servlet\ForwardServlet.java
?????目錄???????????0??2012-07-15?19:47??01\WebRoot\
?????目錄???????????0??2012-07-15?19:47??01\WebRoot\css\
?????文件????????4221??2010-11-18?14:42??01\WebRoot\css\st
?????文件?????????923??2010-11-18?14:45??01\WebRoot\error.jsp
?????文件????????1205??2010-11-18?14:43??01\WebRoot\index.jsp
?????目錄???????????0??2012-07-15?19:47??01\WebRoot\me
?????文件??????????36??2010-11-18?14:41??01\WebRoot\me
?????文件?????????975??2010-11-18?14:44??01\WebRoot\success.jsp
?????目錄???????????0??2012-07-15?19:47??01\WebRoot\WEB-INF\
?????目錄???????????0??2012-07-15?19:47??01\WebRoot\WEB-INF\classes\
?????目錄???????????0??2012-07-15?19:47??01\WebRoot\WEB-INF\classes\com\
?????目錄???????????0??2012-07-15?19:47??01\WebRoot\WEB-INF\classes\com\lh\
?????目錄???????????0??2012-07-15?19:47??01\WebRoot\WEB-INF\classes\com\lh\servlet\
?????文件????????1659??2012-07-15?20:12??01\WebRoot\WEB-INF\classes\com\lh\servlet\ForwardServlet.class
?????目錄???????????0??2012-07-15?19:47??01\WebRoot\WEB-INF\lib\
?????文件?????????659??2010-11-18?14:41??01\WebRoot\WEB-INF\web.xm
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