AJAX front-end transmission of arrays and java back-end reception (back-end reception of array type data sent by the front-end) are two solutions

In the first method, the front-end converts the array into json format data through JSON.stringify() method, and the back-end converts the received json data into an array.

function search() {
			var equiNames = JSON.stringify($("#equiNames").val());
			var startDate = $('#daterange-btn span').text().substring(0, 10);
			var endDate = $('#daterange-btn span').text().substring(13);
			$.ajax({
				url : "dataAcquisition/report",
				type : "post",
				dataType : "json",
				data : {
					"equiNames" : equiNames,
					"startDate" : startDate,
					"endDate" : endDate
				},
				success : function(result) {
					......
					}
				}
			});
		}

@RequestMapping("/report")
	public void report(String equiNames, String startDate, String endDate, HttpServletRequest request,
			HttpServletResponse response) throws ExecutionException, InterruptedException, IOException, ParseException {
		//Converting received json data into arrays
		List<String> equiNameList = new Gson().fromJson(equiNames, new TypeToken<List<String>>() {
		}.getType());
		List<DataAcquisitionVo> resultList = dataAcquisitionService.report(equiNameList, startDate, endDate);
		response.setContentType("application/json; charset=UTF-8");
		response.getWriter().write(new Gson().toJson(resultList));
	}

In the second method, the front end passes the array */ directly by setting the traditional attribute to true, while the background receives the object.

function search() {
			var equiNames = JSON.stringify($("#equiNames").val());
			var startDate = $('#daterange-btn span').text().substring(0, 10);
			var endDate = $('#daterange-btn span').text().substring(13);
			$.ajax({
				url : "dataAcquisition/report",
				type : "post",
				dataType : "json",
                traditional : true,//Serialize data in a traditional way
				data : {
					"equiNames" : equiNames,
					"startDate" : startDate,
					"endDate" : endDate
				},
				success : function(result) {
					......
					}
				}
			});
		}

object

@RequestMapping("/report")
	public void report(ReportParaVo rp, HttpServletRequest request, HttpServletResponse response)
			throws ExecutionException, InterruptedException, IOException, ParseException {
		
		List<DataAcquisitionVo> resultList = dataAcquisitionService.report(rp);
		response.setContentType("application/json; charset=UTF-8");
		response.getWriter().write(new Gson().toJson(resultList));
	}

import java.util.List;

public class ReportParaVo {
	private List<String> equiNames;
	private String startDate;
	private String endDate;

	public List<String> getEquiNames() {
		return equiNames;
	}

	public void setEquiNames(List<String> equiNames) {
		this.equiNames = equiNames;
	}

	public String getStartDate() {
		return startDate;
	}

	public void setStartDate(String startDate) {
		this.startDate = startDate;
	}

	public String getEndDate() {
		return endDate;
	}

	public void setEndDate(String endDate) {
		this.endDate = endDate;
	}

}

The second method works as shown in the figure.