各种格式化-BeanUtils mapToBean requestTobean 含有类型转换

来源：互联网发布：淘宝法莎莉雅手办编辑：程序博客网时间：2024/06/05 02:09

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.beanutils.BeanUtils;

public class BeanOperatorUtils {

   private final static SimpleDateFormat sfyyyyMMddHHmmss = new SimpleDateFormat(
           "yyyy-MM-dd HH:mm:ss");
   private final static SimpleDateFormat sfyyyyMMdd = new SimpleDateFormat(
           "yyyy-MM-dd");

   public static <T> T request2BeanAndConvertType(HttpServletRequest request,
           Class<T> c) throws InstantiationException, IllegalAccessException,
           InvocationTargetException {
       T o = c.newInstance();
       Field[] fields = c.getDeclaredFields();
       for (int i = 0; i < fields.length; i++) {

String fieldName = fields[i].getName();

//将这改成从map中取值就可以实现，mapTobean的转换

           String value = request.getParameter(fieldName);
           if(null == value) continue;
           Object newValue = toType(value,fields[i].getType());
           //System.out.println("1fieldName="+fieldName+" ; 1value="+value+" ; newValue="+newValue+" ;type="+fields[i].getType());

if(null == newValue) continue;

// 将转换后的值转移到bean中

           BeanUtils.copyProperty(   o,fieldName,newValue);
       }
       return o;
   }

   public static void main(String[] args) throws IllegalAccessException,
           InvocationTargetException, InstantiationException {

   }
    //将值得类型进行装换
   public static Object toType(String s, Class c) {
       if (null == s) {
           return null;
       }
       if (c == String.class) {
           return s;
       }
       if (c == int.class) {
           return Integer.parseInt(s);
       }
       if (c == Integer.class) {
           return Integer.valueOf(s);
       }
       if (c == long.class) {
           return Long.parseLong(s);
       }
       if (c == Long.class) {
           return Long.valueOf(s);
       }
       if (c == double.class) {
           return Double.parseDouble(s);
       }
       if (c == Double.class) {
           return Double.valueOf(s);
       }
       if (c == char.class) {
           return s.charAt(0);
       }
       if (c == Date.class) {
           try {
               if (s.length() == 19) {
                   return sfyyyyMMddHHmmss.parse(s);
               }
               if (s.length() == 10) {
                   return sfyyyyMMdd.parse(s);
               }
           } catch (ParseException e) {
               e.printStackTrace();
           }
       }
       return null;
   }


}

1 0