struts與json整合插件包使用-lib jsonobject jsonarray

1、Json-lib 使用JSONObject 與 JSONArray這是使用 json 最常用的 2 個(gè)對(duì)象1. 從 Object 到 String要先用 Object 對(duì)象構(gòu)造一個(gè) JSONObject 或者 JSONArray 對(duì)象，然后調(diào)用它的 toString()方法即可。（1）示例一播客book.setName();（2）示例二book.setName(播客);/結(jié)果如下：System.out.prln(arry.toString();JSONArray arry=JSONArray.fromObject(list);list.add(book2);list.add(book);Lis

2、t list=new ArrayList();book2.setPrice(42.0f);book2.setName(播客海報(bào));Book book2=new Book();book.setPrice(50.5f);Book book=new Book();System.out.prln(object.toString();JSONObject object=JSONObject.fromObject(book);book.setPrice(1.5f);Book book=new Book();name:播客,price:50.5,name:播客海報(bào).從 String 到 Object要先用

3、String 對(duì)象構(gòu)造一個(gè) JSONObject 或者 JSONArray 對(duì)象示例一String json=name:播客,price:50.5;(2)示例二3.從 String 到 Bean(1)單個(gè) Bean 對(duì)象String json=name:播客,price:50.5;ProductJSONObject object=JSONObject.fromObject(json);String json=name:播客,price:50.5,播客海報(bào):C,price:42.0;JSONArray array=JSONArray.fromObject(json);for(i=0;iarray

4、.size();i+) Map o=(Map)array.get(i);System.out.prln(o.get(name)+ +o.get(price);+object.get(price);System.out.prln(object.get(name)+JSONObject object=JSONObject.fromObject(json);,price:42.0(2).Bean 的數(shù)組String json=播客:Java,price:50.5,name:播自定義封裝 JSON 操作的類public sic String getJson(List list)/從Java 的列表轉(zhuǎn)換

5、為字符串return jo.toString();JSONObject jo=JSONObject.fromObject(o);public sic String getJson(Object o)/從普通的Bean 轉(zhuǎn)換為字符串public class JsonHelper import net.sf.json.JSONObject;import net.sf.json.JSONArray;import java.util.Map;import java.util.List;package com.util;System.out.prln(p.getName()+ +p.getPrice()

6、;for(Product p:products)JSONArray.toArray(array,Product.class);Product products=(Product)JSONArray array=JSONArray.fromObject(json);客海報(bào),price:42.0;+product.getPrice();System.out.prln(product.getName()+product=(Product)JSONObject.toBean(object,Product.class);return JSONArray.toArray(ja, cls);JSONArra

7、y ja=JSONArray.fromObject(s);public sic Object getArray(String s,Class cls)/從json 格式的字符串轉(zhuǎn)換為某類對(duì)象的數(shù)組return JSONObject.toBean(jo, cls);JSONObject jo=JSONObject.fromObject(s);public sic Object getObject(String s,Class cls)/從json 格式的字符串轉(zhuǎn)換為某個(gè)Beanreturn JSONArray.fromObject(s);public sic List getArray(String s)/從json 格式的字符串轉(zhuǎn)換為L(zhǎng)ist 數(shù)組returnJSONObject.fromObject(s);public sic Map getObject(String s)/從json 格式的字符串轉(zhuǎn)換為Map 對(duì)象return ja.toString();JSONArray ja=JSONArray.fromObject(arr