Spring MVC中基于自定义Editor的表单数据处理技巧分享

import java.util.Date;

public class UserInfo {

 private String userName;

 private Date birthday;

 private Long score;

 //getters and setters...

}

import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import blog.csdn.net.chaijunkun.formObjs.UserInfo;

@Controller
public class ObjController {

 private static Logger logger= Logger.getLogger(ObjController.class);

 public ObjController(){
  logger.info("对象映射控制器初始化");
 }

 @RequestMapping(value="/getObj.do")
 public String modifyUser(HttpServletRequest request,
   HttpServletResponse response,Map<String, Object> model,
   UserInfo userInfo){
  logger.info("收集对象信息");
  model.put("userInfo", userInfo);  
  return "user";
 }

}

import java.beans.PropertyEditorSupport;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class MyDateEditor extends PropertyEditorSupport {

 @Override
 /**
  * text是表单传入的数据内容
  */
 public void setAsText(String text){
  Date value= null;
  SimpleDateFormat sdf= new SimpleDateFormat();
  sdf.applyPattern("yyyy-MM-dd");
  try{
   value= sdf.parse(text);
  }catch(ParseException e1){
   sdf.applyPattern("MM/dd/yyyy");
   try {
    value= sdf.parse(text);
   } catch (ParseException e2) {
    value= null;
   }
  }
  //这一步将转换好的数据写入到对象映射的属性中
  setValue(value);
 }

}

import org.springframework.beans.propertyeditors.CustomNumberEditor;

public class MyLongEditor extends CustomNumberEditor  {

 public MyLongEditor(){
  super(Long.class, true);
 }

 @Override
 public void setAsText(String text){
  if ((text== null) || text.trim().equals("")){
   setValue(null);
  }else{
   Long value= null;
   try{
    //按照标准的数字格式尝试转换
    value= Long.parseLong(text);
   }catch(NumberFormatException e){
    //尝试去除逗号 然后再转换
    text= text.replace(",", "");
    value= Long.parseLong(text);
   }
   //转好之后将值返给被映射的属性
   setValue(value);   
  }
 }

}