1 /**
2 * 从页面参数获取值来更新bean
3 * 使用说明:页面input框框name值要和javabean的属性值相同
4 */
5 public static void updateBean(HttpServletRequest request,Object bean){
6 Enumeration<?> em = request.getParameterNames();
7 while(em.hasMoreElements()){
8 String param = em.nextElement().toString();
9 if(jodd.bean.BeanUtil.hasProperty(bean, param)){
10 try {
11 Class<?> type = jodd.bean.BeanUtil.getPropertyType(bean, param);
12 String value = request.getParameter(param);
13 if (Clob.class.getName().equals(type.getName())) {
14 Clob clob = ClobUtil.StrToClob(value);
15 jodd.bean.BeanUtil.setProperty(bean, param, clob);
16 }else if(Blob.class.getName().equals(type.getName())){
17 Blob blob = BlobUtil.stringToBlob(value);
18 jodd.bean.BeanUtil.setProperty(bean, param, blob);
19 }else if("int".equals(type.getName())){
20 if(!"".equals(value)){
21 int num = Integer.parseInt(value);
22 jodd.bean.BeanUtil.setProperty(bean, param, num);
23 }
24 }else {
25 jodd.bean.BeanUtil.setProperty(bean, param, value);
26 }
27 } catch (Exception e) {
28
29 }
30 }
31 }
32 }
这个小方法很有意思，仅仅用了一个request和普通的javabean对象就将form表单提交的参数封装进了javabean里面，即使现在很多技术可以实现formbean到javabean的映射，但是很多代码在项目进度允许的情况下，而且也实现了我们需要功能的时候，我会觉得更有意思。
使用方法:
1)创建一个javabean
1 package com.sunyard.bean;
2
3 public class Department {
4 private Integer deptId;
5
6 private String deptName;
7
8 public Department() {
9 }
10
11 public Department(Integer deptId, String deptName) {
12 this.deptId = deptId;
13 this.deptName = deptName;
14 }
15
16 public Integer getDeptId() {
17 return deptId;
18 }
19
20 public void setDeptId(Integer deptId) {
21 this.deptId = deptId;
22 }
23
24 public String getDeptName() {
25 return deptName;
26 }
27
28 public void setDeptName(String deptName) {
29 this.deptName = deptName == null ? null : deptName.trim();
30 }
31
32 @Override
33 public String toString() {
34 return "Department [deptId=" + deptId + ", deptName=" + deptName + "]";
35 }
36
37 }
2)创建一个index.jsp
1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 2 <% 3 String path = request.getContextPath(); 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 5 %> 6 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 8 <html> 9 <head> 10 <base href="<%=basePath%>"> 11 12 <title>My JSP ‘index.jsp‘ starting page</title> 13 14 <meta http-equiv="pragma" content="no-cache"> 15 <meta http-equiv="cache-control" content="no-cache"> 16 <meta http-equiv="expires" content="0"> 17 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 18 <meta http-equiv="description" content="This is my page"> 19 <!-- 20 <link rel="stylesheet" type="text/css" href="styles.css"> 21 --> 22 <script type="text/javascript" src="WEB-INF/static/js/jquery-1.7.2.js"></script> 23 <link rel="stylesheet" href="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/css/bootstrap.min.css"> 24 <script src="http://cdn.static.runoob.com/libs/jquery/2.1.1/jquery.min.js"></script> 25 <script src="http://cdn.static.runoob.com/libs/bootstrap/3.3.7/js/bootstrap.min.js"></script> 26 27 <script type="text/javascript"> 28 29 30 </script> 31 32 </head> 33 34 <body> 35 <form action="test.do" method="post"> 36 <input type="text" name="deptId"/> 37 <input type="text" name="deptName"/> 38 <input type="submit" value="submit"/> 39 </form> 40 </body> 41 </html>
这里需要注意的是input的name属性必须和javabean的属性名称一样，才能做到后台的formbean到javabean的映射。
4)创建servlet
1 package com.sunyard.controller;
2
3 import javax.servlet.http.HttpServletRequest;
4 import javax.servlet.http.HttpServletResponse;
5
6 import org.springframework.stereotype.Controller;
7 import org.springframework.web.bind.annotation.RequestMapping;
8
9 import com.sunyard.bean.Department;
10 import com.sunyard.util.BeanUtil;
11
12 @Controller
13 public class EmpController {
14
15 @RequestMapping("test.do")
16 public void test(HttpServletRequest request,HttpServletResponse response){
17 Department bean = new Department();
18 BeanUtil.updateBean(request, bean);
19 System.out.println(bean);
20 }
21 }
5）输出结果
时间： 2024-10-10 21:32:58