staticmethod.java

软件工程资料

package com.cnpoint.myspaces.common.util;

import java.io.UnsupportedEncodingException;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.util.Iterator;
import java.util.Map;

import org.apache.commons.beanutils.BeanUtils;

public class StaticMethod {
	static String CHARSET_DB = "utf-8";
    static String CHARSET_PAGE = "utf-8";
    
    public static String dbNull2String(String s)
    {
        String reStr;
        reStr = "";
        reStr = s != null ? s : "";
        reStr = reStr.trim();
        if(CHARSET_PAGE.equals(CHARSET_DB))
            return reStr;
        try {
			reStr = new String(reStr.getBytes(CHARSET_DB), CHARSET_PAGE);
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    
        return reStr;
    }
    
    public static String nullObject2String(Object s)
    {
        String str = "";
        try{
            str = s.toString();
        }catch(Exception e){
        	str="";
        }
        return str;
    }
    
    public static void populate(Object bean, Map properties){
        if(bean == null || properties == null)
            return;
        for(Iterator names = properties.keySet().iterator(); names.hasNext();)
        {
            String name = (String)names.next();
            if(name != null)
            {
                Object value = properties.get(name);
                try {
					BeanUtils.setProperty(bean, name, StaticMethod.dbNull2String(StaticMethod.nullObject2String(value)));
				} catch (IllegalAccessException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (InvocationTargetException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
            }
        }
    }
    
    /**
     * 名称：copyPropertys
     * 功能：将o2的属性值拷贝到01中
     * 说明:实现从o2到o1的属性拷贝，字段名相同可以不区分大小写，但要具有相同的类型
     * 输入参数：Object o1，Object o2
     * 返回参数：viod
     */
    public static void copyPropertys(Object o1, Object o2){
      if (o1 == null)
        throw new IllegalArgumentException("No destination bean specified");
      if (o2 == null)
        throw new IllegalArgumentException("No origin bean specified");
      //获得o1的属性列表
      Field[] fieldsO1 = o1.getClass().getDeclaredFields();
      //获得02的属性列表
      Field[] fieldsO2 = o2.getClass().getDeclaredFields();
      try {
        for (int i = 0; i < fieldsO2.length; i++) {
          for (int j = 0; j < fieldsO1.length; j++) {
            //循环判断o1的属性和02的属性名称是否一致
            if (fieldsO2[i].getName().equalsIgnoreCase(fieldsO1[j].getName())) {
              //调用o1的setName方法设置属性值
            	BeanUtils.setProperty(o1, fieldsO1[j].getName(),
            		  BeanUtils.getProperty(o2, fieldsO2[i].getName()));
              break;
            }

          }
        }
      } catch (Exception ex) {
        try {
			throw ex;
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
      }

    }
}