spring mvc MultiActionController 实现 SimpleFormController 自动封装form

一直没在这写过 今天突然高兴 ，昨天搜到 大家在用spring mvc时 对 multi controller 对form的搜集并没有好的处理方法 尤其是 对子对象的操作

废话不说了先说 思路
1  通过测试我发现  如果对象结构 是这样

public class User {
	
	private String username;
	private String password;
	private Address address;

那么

	public ModelAndView saveHandler(HttpServletRequest request,HttpServletResponse response,Object command) throws Exception{
		User user=new User();
		user.setAddress(new Address());
		bind(request, user);
		System.out.println(user);
		return new ModelAndView();
	}

即可  因此为了 通用 我用 我就想用反射 取出  主对象中的从对象然后调用set方法  终于功夫不负苦心人 几经摸索 终于探索出几行代码 用的java.beans 里的类 要是不看spring 还真知道这个类
既然如此 就干脆 override  bind方法 吧 呵呵 刚开始写了 这个

@Override
 protected void bind(HttpServletRequest request, Object command) throws Exception{
        BeanInfo beanInfo= Introspector.getBeanInfo(command.getClass());
        PropertyDescriptor[] pds = beanInfo.getPropertyDescriptors();
        for(PropertyDescriptor pd:pds){
         if(!BeanUtils.isSimpleProperty(pd.getPropertyType())){
          pd.getWriteMethod().invoke(command,pd.getPropertyType().newInstance());
         }
        }
       super.bind(request, command);

 }

最后  找了找发现 BeanUtils 类里方法真全 而且 写的也比用apache 本身的好（个人感觉啊 ） 所以 得出代码

package com.llb.web;

import java.beans.PropertyDescriptor;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.BeanUtils;
import org.springframework.web.servlet.mvc.multiaction.MultiActionController;

public class BaseController extends MultiActionController {
	
	@Override
	protected void bind(HttpServletRequest request, Object command) throws Exception{
        PropertyDescriptor[] pds=BeanUtils.getPropertyDescriptors(command.getClass());
        for(PropertyDescriptor pd:pds){
        	if(!BeanUtils.isSimpleProperty(pd.getPropertyType())){
        		pd.getWriteMethod().invoke(command,pd.getPropertyType().newInstance());
        	}
        }
       super.bind(request, command);

	}

}

为了继续验证 是否正确 我定义了近可能多的 属性

public class User {

	private String username;
	private String password;
	private Address address;

	private boolean flag;
	private int count;
	private Date createDate;
	private double doubleParam;
	private float floatParam;
	private byte byteParam;
	private short shortParam;
	private long longParam;
	private char charParam;

	private Collection collection;
	private List<String> list=new ArrayList<String>(0);;
	private ArrayList arrayList;
	private LinkedList linkedList;
	
	private Set set;
	private HashSet<String> hashSet=new HashSet<String>(0);
	private LinkedHashSet linkedHashSet;
	
	private com.sun.xml.xsom.impl.scd.Iterators.Map map;
	private java.util.Map mapp;
	private HashMap hashMap;
	private LinkedHashMap<String, String> linkedHashMap=new LinkedHashMap<String, String>(0);
	
	private Boolean boolean1;
	private Integer interger1;
	private Double double1;
	private Float float1;
	private Character char1;
	
	private String[] strArray;
	private int[] intArray;

发现 不对 集合类和 非声明的对象还是有问题 于是继续改代码

Class<?> clas=pd.getPropertyType();
        	boolean isSimpleProperty=BeanUtils.isSimpleProperty(clas);
        	boolean isInterface=clas.isInterface();
        	boolean hasConstruct=clas.getConstructors().length==0?false:true;
        	if(!isSimpleProperty&&!isInterface&&hasConstruct){
        		pd.getWriteMethod().invoke(command,clas.newInstance());
        	}

到现在已经是 晚上12点多 ，不做测试了 等以后有bug了 再继续吧  欢迎 朋友们提bug 最后发布最终版（今日）代码

package com.llb.web;

import java.beans.PropertyDescriptor;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.BeanUtils;
import org.springframework.web.servlet.mvc.multiaction.MultiActionController;

public class BaseController extends MultiActionController {
	
	@Override
	protected void bind(HttpServletRequest request, Object command) throws Exception{
        PropertyDescriptor[] pds=BeanUtils.getPropertyDescriptors(command.getClass());
        for(PropertyDescriptor pd:pds){
        	Class<?> clas=pd.getPropertyType();
        	boolean isSimpleProperty=BeanUtils.isSimpleProperty(clas);
        	boolean isInterface=clas.isInterface();
        	boolean hasConstruct=clas.getConstructors().length==0?false:true;
        	if(!isSimpleProperty&&!isInterface&&hasConstruct){
        		pd.getWriteMethod().invoke(command,clas.newInstance());
        	}
        }
       super.bind(request, command);

	}

}

至于 view层  的form  可以直接 xx.xx了 <input type="text" name="address.name"

好累 以后再写吧  
我还写过 一个 ext的封装组件思路 不过一直欣赏 renren网 有兴趣的同志可以 搜下啊哈
http://blog.renren.com/blog/225311006/479329473?isDeclare=false