本文介紹用一個類庫進行JSON解析。 html
工具下載地址:http://sourceforge.net/projects/json-lib/?source=directoryjava
下載後,有這麼三個東東:json
將第一個Jar包導入項目便可用其中的API。dom
(具體方法:在項目中創建libs文件夾,將第一個包複製進去,而後在Java Build Path裏面Add External JARs…) ide
第二個包是文檔,直接右鍵解壓縮以後就會獲得html文檔,入口是index.html,固然也能夠利用工具(jd2chm.exe)將其轉換爲chm格式這樣查看更方便。 工具
第三個包是源碼,感興趣或者之後碰到問題了能夠看看。測試
導入了上面的包以後,運行程序會拋出運行時異常:Exception in thread "main" java.lang.NoClassDefFoundError。ui
搜索以後,才知道還要添加另外的包,我是從這裏下載的: this
http://download.csdn.net/download/guoyongxue/4423006spa
若是沒有積分,也能夠去個人網盤下載:
http://pan.baidu.com/share/link?shareid=1066468750&uk=2701745266
也就是說,一共須要這麼多包:
須要把它們所有加入libs文件夾,而且把它們添加進Build Path中。
時間關係,代碼再也不過多解釋,項目結構如圖:
其中的類:
package com.shengqishiwind.domain; public class Person { private int id; private String name; private String address; public Person() { } public Person(int id, String name, String address) { super(); this.id = id; this.name = name; this.address = address; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } @Override public String toString() { return "Person [id=" + id + ", name=" + name + ", address=" + address + "]"; } }
package com.shengqishiwind.tools; import net.sf.json.JSONObject; public class JsonTools { public JsonTools() { } public static String createJsonString(String key, Object value) { String jsonString = null; JSONObject jsonObject = new JSONObject(); jsonObject.put(key, value); jsonString = jsonObject.toString(); return jsonString; } }
package com.shengqishiwind.service; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import com.shengqishiwind.domain.Person; public class JsonService { public JsonService() { } public Person getPerson() { Person person = new Person(001, "ZhangSan", "Beijing"); return person; } public List<Person> getPersonsList() { List<Person> personsList = new ArrayList<Person>(); Person person1 = new Person(001, "ZhangSan", "Beijing"); Person person2 = new Person(002, "LiSi", "Tianjin"); Person person3 = new Person(003, "WangWu", "Shanghai"); personsList.add(person1); personsList.add(person2); personsList.add(person3); return personsList; } public List<String> getStringsList() { List<String> stringsList = new ArrayList<String>(); stringsList.add("南京"); stringsList.add("杭州"); stringsList.add("承德"); stringsList.add("哈爾濱"); stringsList.add("重慶"); return stringsList; } public List<Map<String, Object>> getMapsList() { List<Map<String, Object>> mapsList = new ArrayList<Map<String, Object>>(); for (int i = 0; i < 3; ++i) { Map<String, Object> map = new HashMap<String, Object>(); map.put("id", i); map.put("name", "Name_" + i); map.put("address", "Address_" + i); mapsList.add(map); } return mapsList; } }
最後測試的主程序:
package com.shengqishiwind.jsontest; import com.shengqishiwind.domain.Person; import com.shengqishiwind.service.JsonService; import com.shengqishiwind.tools.JsonTools; public class Test1 { public static void main(String[] args) { String msg = ""; JsonService service = new JsonService(); Person person = service.getPerson(); // 一個Person對象 msg = JsonTools.createJsonString("aPerson", person); System.out.println(msg); // 一個List,裏面有若干Person對象 msg = JsonTools.createJsonString("Persons", service.getPersonsList()); System.out.println(msg); // 一個List,裏面有若干String對象 msg = JsonTools.createJsonString("StringsList", service.getStringsList()); System.out.println(msg); // 一個List,裏面有若干Map對象,每一個Map對象中存儲了若干個鍵值對 msg = JsonTools.createJsonString("MapsList", service.getMapsList()); System.out.println(msg); } }
程序在控制檯輸出以下:
{"aPerson":{"address":"Beijing","id":1,"name":"ZhangSan"}} {"Persons":[{"address":"Beijing","id":1,"name":"ZhangSan"},{"address":"Tianjin","id":2,"name":"LiSi"},{"address":"Shanghai","id":3,"name":"WangWu"}]} {"StringsList":["南京","杭州","承德","哈爾濱","重慶"]} {"MapsList":[{"id":0,"address":"Address_0","name":"Name_0"},{"id":1,"address":"Address_1","name":"Name_1"},{"id":2,"address":"Address_2","name":"Name_2"}]}
老羅Android開發視頻教程。
本博客上一篇博文:JSON數據解析 基礎知識及連接收集
Json-lib工具類庫下載地址:
http://sourceforge.net/projects/json-lib/?source=directory
http://sourceforge.net/projects/json-lib/files/json-lib/json-lib-2.4/
附加包下載地址:
http://download.csdn.net/download/guoyongxue/4423006
個人百度網盤中所有Json-lib資源下載:
http://pan.baidu.com/share/link?shareid=1066468750&uk=2701745266
若是以爲有幫助,就點個推薦吧~~~