关于Servlet中的add的补充

if("list".equals(act)){

 2             List<RainManage> list=new RainManageServiceimpl().getAll();
 3             request.setAttribute("Alist",list);
 4             request.getRequestDispatcher("index.jsp").forward(request,response);
 5         }else if("add".equals(act)){
 6             String qymc=request.getParameter("qymc");
 7             String jcsj=request.getParameter("jcsj");
 8             String ylz=request.getParameter("ylz");
 9             String jcz=request.getParameter("jcz");
10             String zjdz=request.getParameter("zjdz");
11             System.out.println(qymc);
12             System.out.println(jcsj);
13             System.out.println(ylz);
14             System.out.println(jcz);
15             System.out.println(zjdz);
16             SimpleDateFormat format2=new SimpleDateFormat("yyyy-MM-dd");
17             if(qymc!="" && qymc!=null && jcsj!="" && jcsj!=null && ylz!="" && ylz!=null 
18                     && jcz!=null && jcz!="" && zjdz!=null && zjdz!="" ){
19                 RainManage ra=new RainManage();
20                 ra.setDistrictName(qymc);
21                 
22                 try {
23                     ra.setMonitorTime(format2.parse(jcsj));
24                 } catch (ParseException e) {
25                     // TODO 自动生成的 catch 块
26                     e.printStackTrace();
27                 }
28                 ra.setRain(Integer.parseInt(ylz));
29                 ra.setMonitoringStation(jcz);
30                 ra.setMonitoringAddress(zjdz);
31                 int sum=new RainManageServiceimpl().add(ra);
32                 if(sum>0){
33                     response.sendRedirect("open");
34                 }else{
35                     System.out.println("添加失败!");
36                 }
37             }
38         }else if("del".equals(act)){
39             String id=request.getParameter("id");
40             int sum=0;
41             if(id!=null){
42                 sum=new RainManageServiceimpl().del(Integer.parseInt(id));
43                 out.print(sum);
44             }else{
45         out.print("id不能为空");
46             }
47         }else{
48             List<RainManage> list=new RainManageServiceimpl().getAll();
49             request.setAttribute("Alist",list);
50             request.getRequestDispatcher("index.jsp").forward(request,response);
51         }
52 
53         out.flush();
54         out.close();
55     }