java中ArrayListMapObject与Json互相转换

1、JSON（JavaScriptObjectNotation）:是一种轻量级的数据交换格式一、JSON建构有两种结构：对象和数组1、对象：对象在js中表示为"扩起来的内容，数据结构为key:value,key:value,.的键值对的结构，在面向对象的语言中，key为对象的属性，value为对应的属性值，所以很容易理解，取值方法为对象.key获取属性值，这个属性值的类型可以是数字、字符串、数组、对象几种。2、数组：数组在js中是中括号"扩'起来的内容，数据结构为"java”,"javascript”,"vb”,.,取值方式和所有语言中一样

2、，使用索引获取，字段值的类型可以是数字、字符串、数组、对象几种。经过对象、数组2种结构就可以组合成复杂的数据结构了。二、具体形式1、对象（1）一个对象以"（左括号）开始，"（右括号）结束。（2）每个名称”后跟一个“：（'冒号）（3）冬称/值对”之间使用“，（'逗号）分隔例子：表示人的一个对象："姓名":"大憨",”年龄":242、数组是值（value）的有序集合。（1）一个数组以"（'左中括号）开始，"（右中括号）结束。（2）值之间使用“，（'逗号）分隔。例子：一组学生”学

3、生":"姓名":"小明",”年龄":23,"姓名":"大憨","年龄":24说明：此Json对象包括了一个学生数组，而学生数组中的值又是两个Json对象。说了这些基本了解json的数据结构了.补充：在线Json校验格式化工具：# 3src(defaultpackage)JAddressava.JJJsonTestjavflHhJRESystemLibraryJavaSE-l.tReferencedLibraries* uconfigBnfigdmj沁n&libs.co

4、mmons-beanutilsJar.1commons-coIIections-3.,commons-httpdient-3-1Jar三commans-lang-24Jar三commans-logging-1.1Jar»ezmorph-l»0»&jar妃json-lib-2*2*3-jdkl3jsrconfigdata.json:javascriptviewplaincopyAddress类：1.2.true3.false4.true5.javaviewplaincopy2.*Title:创建Address实体类的POJO3.*©Descript

5、ion:TODO(用一句话描述该文件做什么)4.*authorPotter5.*date2013-2-18上午10:16:036.*versionV1.07.*/8.9.publicclassAddress(10.privateStringstreet;/街道11.privateStringcity;/城市12.privateintzip;/邮编13.privateStringtel;/第一个电话号码14.privateStringtelTwo;/第二个电话号码15.16.publicAddress()(17.18.19.publicAddress(Stringstreet,Stringcit

6、y,intzip,Stringtel,StringtelTwo)(20.this.street=street;21.this.city=city;22.this.zip=zip;23.this.tel=tel;24.this.telTwo=telTwo;25.26.27.publicStringgetStreet()(28.returnstreet;29.30.31.publicvoidsetStreet(Stringstreet)(32.this.street=street;33.34.35.publicStringgetCity()(36.returncity;37.38.39.publi

7、cvoidsetCity(Stringcity)(40.this.city=city;41.42.43.publicintgetZip()(44.returnzip;4.65.66.publicvoidsetZip(intzip)(this.zip=zip;publicStringgetTel()returntel;publicvoidsetTel(Stringtel)this.tel=tel;publicStringgetTelTwo()returntelTwo;publicvoid

8、setTelTwo(StringtelTwo)this.telTwo=telTwo;JsonTest类：javaviewplaincopy1.importjava.io.File;2.importjava.io.FileNotFoundException;3.importjava.io.FileReader;4.importjava.io.IOException;5.importjava.util.ArrayList;6.importjava.util.LinkedHashMap;7.importjava.util.List;8.importjava.util.Map;9.10.importn

9、et.sf.ezmorph.bean.MorphDynaBean;11.importnet.sf.json.JSONArray;12.importnet.sf.json.JSONFunction;13.importnet.sf.json.JSONObject;14.15.publicclassJsonTest17.17.18.publicstaticvoidmain(Stringargs)/javaArray和json互相转换19.javaArrayAndJsonInterChange();20.21.System.out.println("/javaList和json互相转换);2

10、5.System.out.println("/javaMpa和Json互转javaMapAndJsonInterChange(););26.27.System.out.println("/javaObject和jsonObject互转);javaListAndJsonInterChange();28.javaObjectAndJsonInterChange();29.30.31./*32.*javaArray和json互相转换33.*/34.publicstatic35./javavoidjavaArrayAndJsonInterChange()转数组36

11、.booleanboolArray=newbooleantrue,falsetrue;37.38.39.System.out.println(s);40.JSONArrayjsonArray=JSONArray.fromObject(boolArray);Strings=jsonArray.toString();41.42./通过json获取数组中的数据Stringresult=readJson("configdata");43.44.45.JSONArrayjsonR=JSONArray.fromObject(result);intsize=jsonR.size();46

12、.for(inti=0;i<size;i+)47.System.out.println(jsonR.get(i);48.49.51./*52.*javaList和json互相转换53.*/54.publicstaticvoidjavaListAndJsonInterChange()55.Listlist=newArrayList();56.list.add(newInteger(1);57.list.add(newBoolean(true);58.list.add(newCharacter('j');59.list.add(newchar'j','

13、s','o','60.list.add(null);50.n');61.list.add("json");62.list.add(newString"json","-","lib");63.64./list转JSONArray65.JSONArrayjsArr=JSONArray.fromObject(list);66.System.out.println(jsArr.toString(4);67.68./从JSON串至VJSONArray69.jsArr=JSONArray

14、.fromObject(jsArr.toString();70./-从JSONArray里读取71./print:json72.System.out.println(JSONArray)jsArr.get(6).get(0);73.74.75./*76.*javaMpa和Json互转77.*/78.publicstaticvoidjavaMapAndJsonInterChange()79.Mapmap=newLinkedHashMap();80.map.put("integer",newInteger(1);81.map.put("boolean",ne

15、wBoolean(true);82.map.put("char",newCharacter('j');83.map.put("charArr",newchar'j','s','o','n');84./注：不能以null为键名，否则运行报net.sf.json.JSONException:85./java.lang.NullPointerException:86./JSONkeysmustnotbenullnorthe'null'string.87.map.pu

16、t("nullAttr",null);88.89.map.put("str","json");90.map.put("strArr",newString"json","-","lib");91.map.put("jsonFunction",newJSONFunction(newString"i","alert(i)");92.map.put("address",newAddre

17、ss("P.OBOX54534","Seattle,WA",42452,"561-832-3180","531-133-9098");93./map转JSONArray94.JSONObjectjsObj=JSONObject.fromObject(map);95.System.out.println(jsObj.toString(4);96.97./从JSON串至VJSONObject98.jsObj=JSONObject.fromObject(jsObj.toString();99.100./第一种方式：从JS

18、ONObject里读取101./print:json102.System.out.println(jsObj.get("str");/print:address.city=Seattle,WASystem.out.println("address.city="+(JSONObject)jsObj.get("address").get("city");105.106.103. /第二种方式：从动态Bean里读取数据，由于不能转换成具体的Bean,感觉没有多104. 大用处MorphDynaBeanmdBean=(Mo

19、rphDynaBean)JSONObject.toBean(jsObj);/print:jsonSystem.out.println(mdBean.get("str");/print:address.city=Seattle,WASystem.out.println("address.city="+(MorphDynaBean)mdBean.get("address").get("city");113.105. 115.106. /*javaObject和jsonObject互转*/publicstaticvoid

20、javaObjectAndJsonInterChange()(Addressaddress=newAddress("P.OBOX54534","Seattle,WA",42452,"561-832-3180","531-133-9098");/object转JSONObjectJSONObjectjsObj=JSONObject.fromObject(address);System.out.println(jsObj.toString(4);124.107. /JsonObject转javaObject126.108. AddressaddressResult=(Address)JSONObject.toBean(jsObj,Address.class);128.System.out.println("address.city="+addressResult.getCity();129.System.out.println("address.street="+addressResult.getStreet();130.System.out.println("address.tel="+addr