12.12Java日报

编写添加用户的 Servlet

1. package edu.swpu.web.servlet;
2.  
    
3.  
   import edu.swpu.domain.User;
4.  
   import edu.swpu.service.UserService;
5.  
   import edu.swpu.service.impl.UserServiceImpl;
6.  
   import org.apache.commons.beanutils.BeanUtils;
7.  
    
8.  
   import javax.servlet.ServletException;
9.  
   import javax.servlet.annotation.WebServlet;
10.  
    import javax.servlet.http.HttpServlet;
11.  
    import javax.servlet.http.HttpServletRequest;
12.  
    import javax.servlet.http.HttpServletResponse;
13.  
    import java.io.IOException;
14.  
    import java.lang.reflect.InvocationTargetException;
15.  
    import java.util.Map;
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17.  
    @WebServlet("/addUserServlet")
18.  
    public class AddUserServlet extends HttpServlet {
19.  
    @Override
20.  
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
21.  
    //1.设置编码
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    request.setCharacterEncoding("utf-8");
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    //2.获取参数
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    Map<String, String[]> map = request.getParameterMap();
25.  
    //3.封装对象
26.  
    User user = new User();
27.  
    try {
28.  
    BeanUtils.populate(user,map);
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    } catch (IllegalAccessException e) {
30.  
    e.printStackTrace();
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    } catch (InvocationTargetException e) {
32.  
    e.printStackTrace();
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    }
34.  
    //4.调用Service保存
35.  
    UserService service = new UserServiceImpl();
36.  
    service.addUser(user);
37.  
    //5.跳转到userListService,因为没有共享数据，所以使用重定向
38.  
    response.sendRedirect(request.getContextPath()+"/userListServlet");
39.  
     
40.  
    }
41.  
     
42.  
    @Override
43.  
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
44.  
    super.doGet(request, response);
45.  
    }
46.  
    }