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Detailed explanation of the implementation method of springmvc combined with ajax batch addition
Detailed explanation of the implementation method of springmvc combined with ajax batch addition
ajax video tutorialThe column introduces the method of adding ajax batches
Recommended (free): ajax video tutorial
1. Issues that need attention
- The processing date problem of the mvc framework
- @ResponseBodyThe response object is a custom object, and the response is not json
- When @ResopnseBody responds to a custom object, the date is a long type number.
- How to define the parameters of the end data method? Receive multiple objects?
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:
If you want to know more about programming learning, please pay attention to thephp training column!
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