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Detailed explanation of the implementation method of springmvc combined with ajax batch addition

coldplay.xixi

Dec 03, 2020 pm 05:28 PM

ajaxspringmvc

ajax video tutorialThe column introduces the method of adding ajax batches

Detailed explanation of the implementation method of springmvc combined with ajax batch addition

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(&#39;click&#39;, &#39;.remove&#39;, 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=&#39;text&#39; name=&#39;visitorList[" + i + "].name&#39;/>" +
								"</td>" +   
								    
								"<td>" +   
								"	<input type=&#39;text&#39; name=&#39;visitorList[" + i + "].cardNo&#39;/>" +
								"</td>" +   
							    
								"<td>" +   
								"	<input type=&#39;date&#39; name=&#39;visitorList[" + i + "].visitorTime&#39;/>" +
								"</td>" +
							
								"<td>" +
								"	<input type=&#39;radio&#39; value=&#39;1&#39; name=&#39;visitorList[" + i + "].direction&#39;/>进入" +
								"	<input type=&#39;radio&#39; value=&#39;2&#39; name=&#39;visitorList[" + i + "].direction&#39;/>离开" +
								"</td>" +					
							
								"<td>" +       
								"	<input type=&#39;radio&#39; value=&#39;1&#39; name=&#39;visitorList[" + i + "].type&#39;/> 内部" +
								"	<input type=&#39;radio&#39; value=&#39;2&#39; name=&#39;visitorList[" + i + "].type&#39;/> 外部" +
								"</td>" +
					
								"<td>" +
								"	<input class=&#39;remove&#39; type=&#39;button&#39; value=&#39;移除&#39;>" +
								"</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=&#39;text&#39; name=&#39;visitorList[" + index_val + "].name&#39;/>" +
						"</td>" +   
						    
						"<td>" +   
						"	<input type=&#39;text&#39; name=&#39;visitorList[" + index_val + "].cardNo&#39;/>" +
						"</td>" +   
					    
						"<td>" +   
						"	<input type=&#39;date&#39; name=&#39;visitorList[" + index_val + "].visitorTime&#39;/>" +
						"</td>" +
					
						"<td>" +
						"	<input type=&#39;radio&#39; value=&#39;1&#39; name=&#39;visitorList[" + index_val + "].direction&#39;/>进入" +
						"	<input type=&#39;radio&#39; value=&#39;2&#39; name=&#39;visitorList[" + index_val + "].direction&#39;/>离开" +
						"</td>" +					
					
						"<td>" +       
						"	<input type=&#39;radio&#39; value=&#39;1&#39; name=&#39;visitorList[" + index_val + "].type&#39;/> 内部" +
						"	<input type=&#39;radio&#39; value=&#39;2&#39; name=&#39;visitorList[" + index_val + "].type&#39;/> 外部" +
						"</td>" +
			
						"<td>" +
						"	<input class=&#39;remove&#39; type=&#39;button&#39; value=&#39;移除&#39;>" +
						"</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:

Detailed explanation of the implementation method of springmvc combined with ajax batch addition

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