我应该用一个字段创建 Spring Model 类吗？

Question

I don't know should i make class with only one field which l will use as @ModelAttribute to get data from jsp?我不知道我是否应该只使用一个字段来创建类，我将使用该字段作为 @ModelAttribute 从 jsp 获取数据？ for example:例如：

public class Age {
private int number;

public int getNumber() {
    return number;
}

public void setNumber(int number) {
    this.number = number;
}}

And then using spring mvc form tag to fill this ModuleAttribute然后使用 spring mvc 表单标签来填充这个 ModuleAttribute

<form:form action="processForm" modelAttribute="age">

<form:input path="number"/>
</form:form>

Answer 1

First of all, you need to create a controller :首先，您需要创建一个控制器：

@Controller
public class AgeController {

    // this is to create an instance of Age and set in the model. 
    @RequestMapping("showForm")
    public String showForm(Model model) {
        model.addAttribute("age", new Age());
        return "form"; // return form page.
    }

    // this is to print the age in the display page.
    @RequestMapping("processForm")
    public String processForm(@ModelAttribute("age") Age age) {
        return "display"; // return display page where you will display the data populated in the form page.
    }

}

Now, form page should look like :现在，表单页面应该如下所示：

<%@taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<!DOCTYPE html>
<html>
 <!-- When you enter the data here, Spring will set the data in the Age bean by calling respective setter of the data members -->
 <body>
     <form:form action="processForm" modelAttribute="age">
       Enter an age : <form:input path="number" />
       <input type="submit" value="Submit" />
     </form:form>
 </body>
</html>

Now, display page should look like :现在，显示页面应如下所示：

<%@taglib prefix="core" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html>
<html>
 <body>
     The age is : ${age.number} <!-- Here getter is called internally -->
 </body>
</html>

On clicking the submit, the display page will show the data.单击提交后，显示页面将显示数据。

我应该用一个字段创建 Spring Model 类吗？

问题描述

1 个解决方案

解决方案1
0 已采纳 2019-12-15 14:37:06

我应该用一个字段创建 Spring Model 类吗？

问题描述

1 个解决方案

解决方案1 0 已采纳 2019-12-15 14:37:06

解决方案1
0 已采纳 2019-12-15 14:37:06