原文地址:http://blog.csdn.net/lutinghuan/article/details/46820023
问题背景:
我要在一个表单里同时一次性提交多名乘客的个人信息到SpringMVC,前端HTML和SpringMVC Controller里该如何处理?
- 第1种方法:表单提交,以字段数组接收;
- 第2种方法:表单提交,以BeanListModel接收;
- 第3种方法:将Json对象序列化成Json字符串提交,以List接收;
- 第4种方法:将表单对象序列化成Json字符串提交,以List接收;
第4种方法其实是第3种方法的升级,就是将表单转成Json对象,再转成Json字符串提交;
然而,第4种方法还不支持含有多选控件表单的提交,故应该还有第5种加强版的方法。
以上4种方法都共用同一个User实体类,代码如下:
public class User { private Integer id; private String name; private String pwd; @Override public String toString() { return "User{" + "id=" + id + ", name='" + name + '\'' + ", pwd='" + pwd + '\'' + '}'; } }
第1种方法:表单提交,以字段数组接收
HTML代码如下:
<form action="/user/submitUserList_1" method="post"> ID:<input type="text" name="id"><br/> Username:<input type="text" name="name"><br/> Password:<input type="text" name="pwd"><br/><br/> ID:<input type="text" name="id"><br/> Username:<input type="text" name="name"><br/> Password:<input type="text" name="pwd"><br/><br/> <input type="submit" value="submit"> </form>
Java代码如下:
@RequestMapping(value = "/submitUserList_1", method ={RequestMethod.POST}) @ResponseBody public String submitUserList_1(HttpServletResponse response,Integer[] id, String[] name, String[] pwd) throws Exception{ String result = ""; if(id == null || id.length <= 0){ return "No any ID.中文"; } List<User> userList = new ArrayList<User>(); for (int i = 0; i < id.length; i++ ) { User user = new User(); user.setId(id[i]); user.setName(name[i]); user.setPwd(pwd[i]); userList.add(user); } result = this.showUserList(userList); return result; }
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第2种方法:表单提交,以BeanListModel接收
HTML代码如下:
<form action="/user/submitUserList_2" method="post"> ID:<input type="text" name="users[0].id"><br/> Username:<input type="text" name="users[0].name"><br/> Password:<input type="text" name="users[0].pwd"><br/><br/> ID:<input type="text" name="users[2].id"><br/> Username:<input type="text" name="users[2].name"><br/> Password:<input type="text" name="users[2].pwd"><br/><br/> <input type="submit" value="Submit"> </form>
Java代码:
除了刚才公用的User类,还要封装一个User的容器类UserModel:
public class UserModel { private List<User> users; public List<User> getUsers() { return users; } public void setUsers(List<User> users) { this.users = users; } public UserModel(List<User> users) { super(); this.users = users; } public UserModel() { super(); }}
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SpringMVC Controller方法:
@RequestMapping(value = "/submitUserList_2", method ={RequestMethod.POST}) @ResponseBody public String submitUserList_2(UserModel users) throws Exception{ String result = ""; List<User> userList = users.getUsers(); if(userList == null || userList.size() <= 0){ return "No any ID.中文"; } result = this.showUserList(userList); return result; }
第3种方法:将Json对象序列化成Json字符串提交,以List接收
HTML代码:
<head> <title>submitUserList_3</title> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <script language="JavaScript" src="/js/jquery.min.js" ></script> <script language="JavaScript" src="/js/jquery.json.min.js" ></script> <script type="text/javascript" language="JavaScript"> function submitUserList_3() {alert("ok"); var customerArray = new Array(); customerArray.push({id: "1", name: "李四", pwd: "123"}); customerArray.push({id: "2", name: "张三", pwd: "332"}); $.ajax({ url: "/user/submitUserList_3", type: "POST", contentType : 'application/json;charset=utf-8', dataType:"json", data: $.toJSON(customerArray), success: function(data){ alert(data); }, error: function(res){ alert(res.responseText); } }); } </script></head><body> <h1>submitUserList_3</h1> <input id="submit" type="button" value="Submit" onclick="submitUserList_3();"></body>
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Java代码:
@RequestMapping(value = "/submitUserList_3", method ={RequestMethod.POST}) @ResponseBody public String submitUserList_3(@RequestBody List<User> users) throws Exception{ String result = ""; if(users == null || users.size() <= 0){ return "No any ID.中文"; } result = this.showUserList(users); return result; }
第4种方法:将表单对象序列化成Json字符串提交,以List接收
HTML代码:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head> <title>submitUserList_4</title> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <script language="JavaScript" src="/js/jquery.min.js" ></script> <script type="text/javascript" language="JavaScript"> (function($){ $.fn.serializeJson = function(){ var jsonData1 = {}; var serializeArray = this.serializeArray(); $(serializeArray).each(function () { if (jsonData1[this.name]) { if ($.isArray(jsonData1[this.name])) { jsonData1[this.name].push(this.value); } else { jsonData1[this.name] = [jsonData1[this.name], this.value]; } } else { jsonData1[this.name] = this.value; } }); var vCount = 0; for(var item in jsonData1){ var tmp = $.isArray(jsonData1[item]) ? jsonData1[item].length : 1; vCount = (tmp > vCount) ? tmp : vCount; } if(vCount > 1) { var jsonData2 = new Array(); for(var i = 0; i < vCount; i++){ var jsonObj = {}; for(var item in jsonData1) { jsonObj[item] = jsonData1[item][i]; } jsonData2.push(jsonObj); } return JSON.stringify(jsonData2); }else{ return "[" + JSON.stringify(jsonData1) + "]"; } }; })(jQuery); function submitUserList_4() {alert("ok"); var jsonStr = $("#form1").serializeJson(); $.ajax({ url: "/user/submitUserList_4", type: "POST", contentType : 'application/json;charset=utf-8', dataType:"json", data: jsonStr, success: function(data){ alert(data); }, error: function(res){ alert(res.responseText); } }); } </script></head><body> <h1>submitUserList_4</h1> <form id="form1"> ID:<input type="text" name="id"><br/> Username:<input type="text" name="name"><br/> Password:<input type="text" name="pwd"><br/><br/> ID:<input type="text" name="id"><br/> Username:<input type="text" name="name"><br/> Password:<input type="text" name="pwd"><br/><br/> <input type="button" value="submit" onclick="submitUserList_4();"> </form></body></html>
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Java代码:
@RequestMapping(value = "/submitUserList_4", method ={RequestMethod.POST}) @ResponseBody public String submitUserList_4(@RequestBody List<User> users) throws Exception{ String result = ""; if(users == null || users.size() <= 0){ return "No any ID.中文"; } result = this.showUserList(users); return result; }
总结:
第1、2种方法其实都有一个共同的BUG:假如提交三条记录时,前面两条记录的某些字段不填值的话,在SpringMVC里接收不准确了。而且,每2种方法在HMTL中需要给name属性添加[下标],如果下标有跨度的话(比如第一组控件下标是0,第二组下标是2),那么SpringMVC里其实的是0到2三个对象的,默认下标是1的那个对象全为null值。
第3、4种方法最实用。
以上方法参考自以下URL:
http://www.cnblogs.com/wsw0515/p/3582627.html
http://www.oschina.net/question/917732_106601
http://jxd-zxf.iteye.com/blog/2072300
http://www.tashan10.com/jquery-jiang-biao-dan-xu-lie-hua-wei-jsondui-xiang/
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