springmvc 结合ajax批量新增

1. 需要注意的问题

mvc框架的处理日期问题
@ResponseBody响应对象是自定义对象，响应不是json
@ResopnseBody响应自定义对象时，日期为是long类型的数
结束数据方法的参数，该如何定义？接收多个对象？

2. 页面代码

<%@ 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1index_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学得terrible… 能够移除，我的移除是先移除所有的行，重新生成行，比较之前生成的行，少一行。

3. controller定义参数接收

实体类VisitorInfo


package cn.bitqian.entity;import java.util.Date;import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;import org.springframework.format.annotation.DateTimeFormat;import com.fasterxml.jackson.annotation.JsonFormat;@Table(name="visit_info")
@Entity(name="VisitorInfo")
public class VisitorInfo {@Id@GeneratedValue(strategy=GenerationType.AUTO)private Integer id;private String name;@Column(name="card_no")private String cardNo;@Column(name="visitor_time") // datetime@DateTimeFormat(pattern="yyyy-MM-dd") // 页面提交来的@JsonFormat(pattern="yyyy-MM-dd") // 服务器响应回来的json日期格式private Date visitorTime;private Integer direction; // 1进入 2 离开private Integer type; // 1. 内部 2. 外部public VisitorInfo() {}public VisitorInfo(Integer id, String name, String cardNo, Date visitorTime, Integer direction, Integer type) {super();this.id = id;this.name = name;this.cardNo = cardNo;this.visitorTime = visitorTime;this.direction = direction;this.type = type;}// setter/getter 省略}

批量新增实体类BatchVisitor ，定义集合接收多个对象

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方法，放实体类，实体类里面套VisitorInfo的集合

	@RequestMapping(value="/batchAdd", method=RequestMethod.POST)@ResponseBodypublic 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);}

对于上面响应了对象到页面，会报错，需要导入json的依赖。

	<!-- 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>