Kai*_*per 7 java data-binding spring-mvc
我正在学习Spring MVC,我到处寻找一个基本的控制器来查看数据绑定,但我没有尝试过任何工作.我可以将视图发布回控制器,我可以在那里看到带有属性的pojo,但每当我尝试将该对象添加到模型时,我什么也得不到.这是我到目前为止:
调节器
@Controller
public class HomeController {
@RequestMapping(value = "/", method = RequestMethod.GET)
public String home(Model model) {
model.addAttribute(new Person());
return "home";
}
@RequestMapping(value="/about", method=RequestMethod.POST)
public void about(Person person, Model model)
{
model.addAttribute("person", person);
}
}
我要绑定的类
public class Person {
private String _firstName;
private String _lastName;
private Date _Birthday;
//Set
public void setFirstName(String FirstName){this._firstName = FirstName; }
public void setLastName(String LastName){this._lastName= LastName; }
public void setBirthDate(Date BirthDate){ this._Birthday = BirthDate;}
//get
public String getFirstName(){return _firstName;}
public String getLastName(){return _lastName;}
public Date getBirthDate(){return _Birthday;}
}
查看 - 控制器到表单!工作
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<html>
</head>
<body>
FirstName: ${model.person.getFirstName}
LastName: ${model.person.getLastName}
</body>
</html>
我可以或需要做什么才能让它绑定？
模型属性是您在这里缺少的东西.
@Controller
public class HomeController {
@ModelAttribute("person")
public Person getPerson(){
return new Person();
}
@RequestMapping(value = "/", method = RequestMethod.GET)
public String home() {
return "home";
}
@RequestMapping(value="/about", method=RequestMethod.POST)
public void about(@ModelAttribute("person") Person person, BindingResult result, Model model)
{
if( ! result.hasErrors() ){
// note I haven't compiled this code :)
}
}
}
我们的想法是在GET和POST上都会调用@ModelAttribute方法,在GET请求中它只会暴露给视图,而在POST上它将用于绑定请求参数.
请注意,它将BindingResult传递给POST方法,以便您可以对该命令执行某些操作.
| 归档时间： |
|
| 查看次数： |
33250 次 |
| 最近记录： |