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结构如下:

当没有登录admin用户去删除时：

当登录admin用户删除时：

首先是一个Servlet：

LoginServlet.java

package my;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;import javax.servlet.http.HttpSession;public class LoginServlet extends HttpServlet {	/**	 * Constructor of the object.	 */	public LoginServlet() {		super();	}	/**	 * Destruction of the servlet. 
	 */	public void destroy() {		super.destroy(); // Just puts "destroy" string in log		// Put your code here	}	/**	 * 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 {		response.setContentType("text/html");		PrintWriter out = response.getWriter();		out.println("");		out.println("");		out.println("  ");		out.println("  ");		out.print("    This is ");		out.print(this.getClass());		out.println(", using the GET method");		out.println("  ");		out.println("");		out.flush();		out.close();	}	/**	 * 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");		String user=request.getParameter("user");		String password=request.getParameter("password");				if("123456".equals(password)){			HttpSession hs=request.getSession();			hs.setAttribute("user", user);						//重定向到index.jsp			String contextPath=request.getContextPath();			response.sendRedirect(contextPath+"/index.jsp");		}		else{			response.sendError(400,"错误的密码！");		}	}	/**	 * Initialization of the servlet. 
	 *	 * @throws ServletException if an error occurs	 */	public void init() throws ServletException {		// Put your code here	}}

UserDeleteAction.java

package my;import java.util.Map;import org.apache.log4j.Logger;import org.apache.struts2.interceptor.SessionAware;import com.opensymphony.xwork2.ActionSupport;public class UserDeleteAction extends ActionSupport	implements SessionAware{		static Logger logger=Logger.getLogger(UserDeleteAction.class);	int id=-1;	//要删除的id	String reason;	//结果			private Map
   
     userSession;	@Override	public void setSession(Map
    
      arg0) {		userSession=arg0;	}	@Override	public String execute() throws Exception {		String user=(String)userSession.get("user");		if(!"admin".equals(user)){			reason="无权限进行删除！";			return "error";		}		if(id<=0){			reason="请输入删除的ID！";			return "error";		}		return "success";	}	public int getId() {		return id;	}	public void setId(int id) {		this.id = id;	}	public String getReason() {		return reason;	}	public void setReason(String reason) {		this.reason = reason;	}	}
    
   

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>              	
   	
   	
       	
   	
   	
           	首页  

login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>                  	
   	
   	
       	
   	
   	
           	
   
      	用户名：
    
    
    
  	密码：
    
    
    
  	
    
    
    
  	
   
  

UserDelete_error.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags" %><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>                  	
   	
   	
       	
   	
   	
           	
操作失败
  	
    
  

UserDelete_success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags" %><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>                  	
   	
   	
       	
   	
   	
           	操作成功。用户 [ 
    ] 被删除！  

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