六、使用InitBinder来处理Date类型的参数

六、使用InitBinder来处理Date类型的参数

https://www.cnblogs.com/sunniest/p/4555801.html

    //the parameter was converted in initBinder
    @RequestMapping("/date")
    public String date(Date date){
        System.out.println(date);
        return "hello";
    }
    
    //At the time of initialization,convert the type "String" to type "date"
    @InitBinder
    public void initBinder(ServletRequestDataBinder binder){
        binder.registerCustomEditor(Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),
                true));
    }

 

package test.SpringMVC;
//D:\Indigo_workspace2\HelloSpringMVC\src\test\SpringMVC\personController.java
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.ServletRequestDataBinder;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
//http://localhost:8080/HelloSpringMVC/person/showData

@Controller
@RequestMapping("/person")
public class personController {

  // http://localhost:8080/HelloSpringMVC/person/showData
  //使用modelAndView对象将数据传递到前台。
  //传递多个参数（不同类型的）
     @RequestMapping("/showData")
     public ModelAndView showData(){
        System.out.println("showData");
        
        String message = "这个是要传递的数据";
        
        User user = new User("张三", 12, new Date());
        
        List<User> us= new ArrayList<User>();
        us.add(new User("张三", 12, new Date()));
        us.add(new User("张四", 13, new Date()));
        us.add(new User("张五", 14, new Date()));
        
        ModelAndView mad = new ModelAndView("showData");
        //将数据存入modelMap
        mad.addObject("message", message);
        mad.addObject("user",user);//默认为类名的首字母小写
        mad.addObject("users", us);
        return mad;
    }
     
  // http://localhost:8080/HelloSpringMVC/postPerson.html
  // http://localhost:8080/HelloSpringMVC/person/toperson 
   //boxing automatically
     @RequestMapping(value = "/toperson", method ={RequestMethod.POST})
     @ResponseBody
     public String toPerson(UserModel users){
         //System.out.println(p.getName()+" "+p.getAge());
         //ModelAndView mad=new ModelAndView("toperson");
         //mad.addObject("person",p);
         //return mad;
         
         String result = "";
         List<User> userList = users.getUsers();
         if(userList == null || userList.size() <= 0){ return "No any ID."; }
         User u=userList.get(0);
         result = u.getName()+" "+u.getAge();
         return result;         
     }
     
  // http://localhost:8080/HelloSpringMVC/person/date?date=2018-10-17
     //the parameter was converted in initBinder
     @RequestMapping("/date")
     public String date(Date date){
         System.out.println(date);
         return "hello";
     }
     //http://localhost:8080/TrySpringMVC/person/date?date=2018-10-17
     //Wed Oct 17 00:00:00 CST 2018
     //
     
     //At the time of initialization,convert the type "String" to type "date"
     @InitBinder
     public void initBinder(ServletRequestDataBinder binder){
         binder.registerCustomEditor(Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),
                 true));
     }
        
}