BeanUtils在web项目中的应用

package cn.gdpe.jdbc;

import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.beanutils.BeanUtils;

import cn.gdpe.bean.User;

public class WebBeanUtil {

//原始
   public static void copyToBean(HttpServletRequest request,Object object){
       try {
//           T object=clazz.newInstance();
           Enumeration<String> en = request.getParameterNames();//获取所有表单名字
           while(en.hasMoreElements()){
               String name=en.nextElement();//获取name值
               String value=request.getParameter(name);
               BeanUtils.copyProperty(object,name,value);
//               BeanUtils.setProperty(object,name,value);
           }
       } catch (Exception e) {
           throw new RuntimeException(e);
       }
   }

//这种应用到了泛型
   public static <T> T copyToBean2(HttpServletRequest request,Class<T> clazz){
       try {
           T object=clazz.newInstance();
           Enumeration<String> en = request.getParameterNames();//获取所有表单名字
           while(en.hasMoreElements()){
               String name=en.nextElement();//获取name值
               String value=request.getParameter(name);
               BeanUtils.copyProperty(object,name,value);
//               BeanUtils.setProperty(object,name,value);
//
           }
           return object;
       } catch (Exception e) {
           throw new RuntimeException(e);
       }
   }
   /*
   * 支持这种方法
   */
   public static <T> T copyToBean3(HttpServletRequest request,Class<T> clazz){
       try {
           T object=clazz.newInstance();
           BeanUtils.populate(object, request.getParameterMap());
           return object;
       } catch (Exception e) {
           throw new RuntimeException(e);
       }
   }
}

巴特西

BeanUtils在web项目中的应用

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