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1. Issues that need attention
2. Page code
<%@ page language="java" isELIgnored="false" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>ajax批量新增操作</title> <script type="text/javascript" src="js/jquery-3.4.1.js"></script> </head> <body> <form id="myForm"> <table border="1" > <tr> <td>姓名</td> <td>身份证</td> <td>时间</td> <td>direction</td> <td>type</td> <td>操作</td> </tr> <tbody id="tbody"> <tr> <td> <!-- 集合为自定义实体类中的结合属性,有几个实体类,改变下标就行了。 --> <input type="text" name="visitorList[0].name"/> </td> <td> <input type="text" name="visitorList[0].cardNo"/> </td> <td> <input type="date" name="visitorList[0].visitorTime"/> </td> <td> <input type="radio" value="1" name="visitorList[0].direction"/>进入 <input type="radio" value="2" name="visitorList[0].direction"/>离开 </td> <td> <input type="radio" value="1" name="visitorList[0].type"/> 内部 <input type="radio" value="2" name="visitorList[0].type"/> 外部 </td> <td> <input class="remove" type="button" value="移除"> </td> </tr> </tbody> <tr> <td colspan="6"> <input id="add" type="button" value="新增visitor" /> <input id="save" type="button" value="保存"/> </td> </tr> </table> </form> <script> $(function() { var index_val = 0; $("body").on('click', '.remove', function() { // 移除当前行, 通过父级来绑定... // $(this).parent().parent().remove(); $("#tbody tr").remove(); // 覆盖,生成行 if (index_val > 0) { var data_str = ""; for (var i = 0; i < index_val; i++) { data_str += "<tr>" + "<td>" + " <input type='text' name='visitorList[" + i + "].name'/>" + "</td>" + "<td>" + " <input type='text' name='visitorList[" + i + "].cardNo'/>" + "</td>" + "<td>" + " <input type='date' name='visitorList[" + i + "].visitorTime'/>" + "</td>" + "<td>" + " <input type='radio' value='1' name='visitorList[" + i + "].direction'/>进入" + " <input type='radio' value='2' name='visitorList[" + i + "].direction'/>离开" + "</td>" + "<td>" + " <input type='radio' value='1' name='visitorList[" + i + "].type'/> 内部" + " <input type='radio' value='2' name='visitorList[" + i + "].type'/> 外部" + "</td>" + "<td>" + " <input class='remove' type='button' value='移除'>" + "</td>" + "</tr>"; } $("#tbody").append(data_str); } // 把下标减少一 就行了,就是移除了。 index_val --; console.log("remove: ", index_val); }); $("#add").click(function() { // 自增1 index_val ++; var data_str = "<tr>" + "<td>" + " <input type='text' name='visitorList[" + index_val + "].name'/>" + "</td>" + "<td>" + " <input type='text' name='visitorList[" + index_val + "].cardNo'/>" + "</td>" + "<td>" + " <input type='date' name='visitorList[" + index_val + "].visitorTime'/>" + "</td>" + "<td>" + " <input type='radio' value='1' name='visitorList[" + index_val + "].direction'/>进入" + " <input type='radio' value='2' name='visitorList[" + index_val + "].direction'/>离开" + "</td>" + "<td>" + " <input type='radio' value='1' name='visitorList[" + index_val + "].type'/> 内部" + " <input type='radio' value='2' name='visitorList[" + index_val + "].type'/> 外部" + "</td>" + "<td>" + " <input class='remove' type='button' value='移除'>" + "</td>" + "</tr>"; $("#tbody").append(data_str); console.log("add==>" + index_val); }); $("#save").click(function() { var form_data = $("#myForm").serialize(); // console.log(form_data) $.ajax({ url: "visitor/batchAdd", type: "post", data: form_data, success: function(data) { console.log(data); }, error: function(e) { console.log(e); } }); }); }); </script> </body> </html>
js learned terrible... It can be removed. My removal is to remove all the rows first, regenerate the rows, and compare the previously generated rows. , one less line.
3. Controller definition parameter reception
Batch new entity class BatchVisitor, define collection to receive multiple objects
package cn.bitqian.entity; import java.util.ArrayList; import java.util.List; /** * 批量新增 visitorInfo * @author echo lovely * */ public class BatchVisitor { private List<VisitorInfo> visitorList = new ArrayList<>(); public List<VisitorInfo> getVisitorList() { return visitorList; } public void setVisitorList(List<VisitorInfo> visitorList) { this.visitorList = visitorList; } public BatchVisitor() {} }
Controller method, put the entity class, and set VisitorInfo in the entity class The collection
@RequestMapping(value="/batchAdd", method=RequestMethod.POST) @ResponseBody public VisitorInfo batchAddVisitor(BatchVisitor batchVisitor) { List<VisitorInfo> visitorList = batchVisitor.getVisitorList(); // System.out.println(batchVisitor); for (VisitorInfo visitorInfo : visitorList) { System.out.println(visitorInfo); visitorInfoService.save(visitorInfo); } return new VisitorInfo(1, "dd", "bb", new Date(), 1, 2); }
will report an error if the above object is responded to the page, and the json dependency needs to be imported.
<!-- json 用于响应 responseBody --> <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.9.6</version> </dependency>
To receive the parameters of the page, you need to convert the string into a date. You need
mvc custom date converter
or add annotations. MVC will convert the string into a date in the corresponding format
When the response object has a date, the solution is:
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