[JAVA] How to bind request parameters in list format with bean property in Spring

How to bind list format request parameters

You can bind the request parameters when the bean property is in list format with the following code.

	<form action="/sample/bean" method="post">
				<td>Input 1:price:</td>
				<td><input type="text" name="sampleBean.childBean[0].price"></td>
				<td>Input 1:unit:</td>
				<td><input type="text" name="sampleBean.childBean[0].unit"></td>
				<td>Input 2:price:</td>
				<td><input type="text" name="sampleBean.childBean[1].price"></td>
				<td>Input 2:unit:</td>
				<td><input type="text" name="sampleBean.childBean[1].unit"></td>
public class SampleController {

	@RequestMapping(value="/sample/bean", method=RequestMethod.POST)
	public String goUserCreateErrorPage(SampleBean sampleBean) {
		return "sample";
public class SampleBean {
  private String childBeanUnit;
  private List<SampleChildBean> childBean;
※getter,setter is abbreviation

public class SampleChildBean {
	private String price;
	private String unit;
※getter,setter is abbreviation


In this case, there is a point in how to define the name attribute of input. If you explain one by one, Explanation 1: Argument name of the binding target specified in the argument of @RequestMapping method on the Controller side Explanation 2: Specify the property name defined in the class of the argument to be bound. Since it is a list, specify the index number as well. Explanation 3: Finally, specify the property of the property class specified in Explanation 2 (is it complicated?)

<input type="text" name="sampleBean.childBean[0].price">
Commentary 1 Commentary 2 Commentary 3

At the end

It's good to write it before I forget it, but the explanation is not good enough. Let's think of a better explanation when we have time, lol

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