javabean 转 json

以下代码仅为一个demo，是我自己封装的一个把bean转为json的方法，希望能给大家一点帮助

 

package com.test;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
@SuppressWarnings("unchecked")
public class JsonFactory {

	public static void main(String[] args) throws Exception {
		ImageBean image = new ImageBean(1, "aa", "aaa");
		ImageBean image1 = new ImageBean(22, "2bsdb3a", "322s323aaa");
		ImageBean image2 = new ImageBean(333, "aa234", "aa23sdfbsdba");
		List list1 = new ArrayList();
		list1.add(image);
		list1.add(image1);
		list1.add(image2);
		List list2 = new ArrayList();
		list2.add(image);
		list2.add(image1);
		list2.add(image2);
		JsonBean jsonbean = new JsonBean("IMLC", false, list1);
		JsonBean jsonbean2 = new JsonBean("IMLC", false, list2);
		
		List list3 = new ArrayList();
		list3.add(jsonbean);
		list3.add(jsonbean2);
		
		JsonFactory fc = new JsonFactory();
		System.out.println(fc.getJson(list3));
	}
	StringBuffer json=new StringBuffer();
	static{
	
	
	}
	public String getJson(List list) throws Exception{
		json.append("[");
		for (int i = 0; i < list.size(); i++) {
			json.append("{");
			Object obj =list.get(i);
			Class invokeClass = Class.forName(obj.getClass().getName());
			
			Method [] method = obj.getClass().getDeclaredMethods();
			int count = obj.getClass().getDeclaredFields().length;
			int count1 =0;
			for (int j=0;j<method.length;j++) {
				Method me = method[j];
				String meName = me.getName();
				if(meName.startsWith("get")){
					count1++;
					String field = meName.substring(3, meName.length()).toLowerCase();
					String type = me.getReturnType().getName();
					String shortType = "";
					if(type.indexOf('.')>0){
						shortType = type.substring(type.lastIndexOf('.')+1, type.length());
						if("String".equals(shortType)){
							json.append(field +":'"+invokeClass.getMethod(meName, null).invoke(obj, new Object[0])+"'");
							
						}else if("".equals(shortType)){
							
						}else if("".equals(shortType)){
							
						}else if("List".equals(shortType)){
							json.append(field+":");
							getJson((List)invokeClass.getMethod(meName, null).invoke(obj, new Object[0]));
							//json.append("}]");
						}else{
							
						}
						
					}else if("boolean".equals(type)){
						
						json.append(field +":'"+invokeClass.getMethod(meName, null).invoke(obj, new Object[0])+"'");
						
					}else if("int".equals(type)){
						json.append(field +":'"+invokeClass.getMethod(meName, null).invoke(obj, new Object[0])+"'");
					}
					if(count!=count1){
						//json.append("}");
						json.append(",");
					}
				}
				
			}
			json.append("}");
			if(i!=list.size()-1){
				
				json.append(",");
			}
			
		}
		json.append("]");
		return json.toString();
	}
	
	
}