cateservlet.java

基于strurs架构+servlet+jsp+javabean架构科研管理系统

/*
 * Created on 2008-6-8
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package cn.edu.zucc.research.servlet;

import java.io.IOException;
import java.rmi.RemoteException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Hashtable;

import javax.ejb.CreateException;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.edu.zucc.research.ejb.session.cate.*;
import cn.edu.zucc.research.model.ResearchCate;


public class CateServlet extends HttpServlet {
	ResearchCateS dao=null;
	private long seed = 1;

    private SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");

	private ResearchCateSHome getHome()throws NamingException {
		return (ResearchCateSHome) getContext().lookup(ResearchCateSHome.JNDI_NAME);
	}

	private InitialContext getContext() throws NamingException {
		Hashtable props = new Hashtable();
		props.put(InitialContext.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory");
		props.put(InitialContext.PROVIDER_URL, "jnp://127.0.0.1:1099");

// This establishes the security for authorization/authentication
// props.put(InitialContext.SECURITY_PRINCIPAL,"username");
// props.put(InitialContext.SECURITY_CREDENTIALS,"password");

		InitialContext initialContext = new InitialContext(props);
		//System.out.println("gjy4:"+initialContext);
		return initialContext;
	}

	
	
    public void init() throws ServletException {
    	try{
			dao=getHome().create();
		}catch(RemoteException e){
			e.printStackTrace();
		}catch(CreateException e){
			e.printStackTrace();
		}catch(NamingException e){
			e.printStackTrace();
		}
        //TODO Method stub generated by Lomboz
    }
    public void destroy() {
        // TODO Auto-generated method stub
    	try{
        	dao.remove();
        }catch(Exception e){}
        super.destroy();
    }

    public java.lang.String getServletInfo() {
        //TODO Method stub generated by Lomboz
        return super.getServletInfo();
    }

    protected void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        //TODO Method stub generated by Lomboz
    	this.doPost(request, response);
    }
    
    private String listResearchCate(HttpServletRequest request){
    	try{    		
    		request.setAttribute("objlist",dao.loadAll());
    		System.out.println("列出成功！");
    		return "/researchCate_list.jsp";
    	}catch(Exception ex){
			ex.printStackTrace();
			request.setAttribute("errormsg", ex.getMessage());
			return "/error.jsp";
		}
    }
    
    private String addResearchCate(HttpServletRequest request){
    	try{
    		ResearchCate resc=new ResearchCate();
    		resc.setMethod("addResearchCateResult");
    		request.setAttribute("researchCate",resc);
    		System.out.println("add");
    		return "/researchCate_edit.jsp";
    	}catch(Exception ex){
			ex.printStackTrace();
			request.setAttribute("errormsg", ex.getMessage());
			return "/error.jsp";
		}
    }
    
    private String addResearchCateResult(HttpServletRequest request){
    	try{   
    		ResearchCate researchCate =new ResearchCate();
    		researchCate.setCategoryId(df.format(new Date()) + "-" + (seed++));
    		System.out.println("categoryid---"+researchCate.getCategoryId());
    		String name=request.getParameter("categoryName");
    		System.out.println("categoryName---"+name);
    		researchCate.setCategoryName(name);
    		this.dao.saveCate(researchCate);
    		System.out.println("save---success");
    		return this.listResearchCate(request);
    	}catch(Exception ex){
			ex.printStackTrace();
			request.setAttribute("errormsg", ex.getMessage());
			return "/error.jsp";
		}
    }
    
    private String modifyResearchCate(HttpServletRequest request){
    	try{
    		String id=request.getParameter("id");
    		System.out.println("mod--read--id---"+id);
    		ResearchCate resCate=this.dao.readCate(id);
    		System.out.println("read---"+resCate.getCategoryId());
    		resCate.setMethod("modifyResearchCateResult");
    		request.setAttribute("researchCate",resCate);
    		return "/researchCate_edit.jsp";
    	}catch(Exception ex){
			ex.printStackTrace();
			request.setAttribute("errormsg", ex.getMessage());
			return "/error.jsp";
		}
    }
    
    private String modifyResearchCateResult(HttpServletRequest request){
    	try{   
    		ResearchCate researchCate =new ResearchCate();
    		researchCate.setCategoryId(request.getParameter("categoryId"));
    		researchCate.setCategoryName(request.getParameter("categoryName"));
    		this.dao.mergeCate(researchCate);
    		System.out.println("merge---success");
    		return this.listResearchCate(request);
    	}catch(Exception ex){
			ex.printStackTrace();
			request.setAttribute("errormsg", ex.getMessage());
			return "/error.jsp";
		}
    }
    
    private String delete(HttpServletRequest request){
    	try{   
    		String id=request.getParameter("id");
    		System.out.println("del--id---"+id);
    		ResearchCate resCate=this.dao.readCate(id);
    		this.dao.deleteCate(resCate);
    		System.out.println("delete---success");
    		return this.listResearchCate(request);
    	}catch(Exception ex){
			ex.printStackTrace();
			request.setAttribute("errormsg", ex.getMessage());
			return "/error.jsp";
		}
    }

    protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        //TODO Method stub generated by Lomboz
    	/*if(request.getSession().getAttribute("adminname")==null){
            if(request.getParameter("method")!=null
                    &&!request.getParameter("method").equals("read")) {
                response.sendRedirect("adminLogin.jsp");
                return;
            }
        }*/
        System.out.println("gjy");
        request.setCharacterEncoding("gbk");
        String method = request.getParameter("method");        
        System.out.println("gjy-----"+method);
        if (method == null)
            method = "";
        String result = "";
        if(method.equals("listResearchCate"))
        	result=this.listResearchCate(request);
        else if(method.equals("addResearchCate"))
        	result=this.addResearchCate(request);
        else if(method.equals("addResearchCateResult"))
        	result=this.addResearchCateResult(request);
        else if(method.equals("modifyResearchCate"))
        	result=this.modifyResearchCate(request);
        else if(method.equals("modifyResearchCateResult"))
        	result=this.modifyResearchCateResult(request);
        else if(method.equals("delete"))
        	result=this.delete(request);
        else
        	result=this.listResearchCate(request);
        RequestDispatcher dispatcher = request.getSession().getServletContext().getRequestDispatcher(result);
        if (dispatcher != null)
        	dispatcher.forward(request, response);

    }
}