java - 如何将值传递给模型类

Question

在jsp页面中我使用输入字段

<input type="text"  name="basic" id="basic"  >

在 Controller 中

@RequestMapping(value="/palySlip/add",method=RequestMethod.POST)
public String addData(@ModelAttribute("empPaySlip") EmployeePlaySlip e){

    return "redirect:/employeepayin";
}

并将值设置到模型类中

 public class EmployeePlaySlip {
    private double basic;
    public double getBasic() {
        return basic;
    }
    public void setBasic(double basic) {
        this.basic = basic;
    }
}

但是在发送数据时我遇到了错误

HTTP Status 400 - type Status report message description The request sent by the client was syntactically incorrect.

Answer 1

首先，您需要将一个对象设置为模型属性。

@RequestMapping(value="/employeepaying",method=RequestMethod.POST)
public ModelAndView showData(){
    ModelAndView mav = new ModelAndView("employeepayingPage");
    mav.addObject(empPaySlip, new EmployeePlaySlip ());
    return mav;
}

将 Spring 标签库添加到您的 JSP 中:

<%@taglib uri="http://www.springframework.org/tags/form" prefix="form"%>

创建提交表单:

<form:form method="post"  modelAttribute="empPaySlip" action="/palySlip/add">
    <form:input path="basic" />
    <input type="submit" value="Submit" />
</form:form>

然后获取您的模型属性。

@RequestMapping(value="/palySlip/add", method=RequestMethod.POST)
public String addData(@ModelAttribute("empPaySlip") EmployeePlaySlip e){
    // Do whatever you want with your object
    return "redirect:/employeepaying";
}