解析json之net.sf.json
阿新 • • 發佈：2019-01-24
下載地址
本次使用版本:http://sourceforge.net/projects/json-lib/files/json-lib/json-lib-1.1/
最新版本:http://sourceforge.net/projects/json-lib/files/json-lib/使用net.sf.json需要匯入的包
JSONObject
package com.itlwc.test; import net.sf.json.JSONArray; import net.sf.json.JSONObject; public class Test { public static void main(String[] args) { // 建立JSONObject JSONObject jsonObject = new JSONObject(); jsonObject.put("username", "lwc"); jsonObject.put("password", "123"); // 列印:1 System.out.println(jsonObject); // 增加屬性,列印:2 jsonObject.element("sex", "男"); System.out.println(jsonObject); // 根據key返回,列印:3 System.out.println(jsonObject.get("sex")); // 判讀輸出物件的型別 boolean isArray = jsonObject.isArray(); boolean isEmpty = jsonObject.isEmpty(); boolean isNullObject = jsonObject.isNullObject(); // 列印:4 System.out.println("是否陣列:" + isArray + " 是否空:" + isEmpty + " 是否空物件:" + isNullObject); // 把JSONArray增加到JSONObject中 JSONArray jsonArray = new JSONArray(); jsonArray.add(0, "lwc"); jsonArray.add(1, "nxj"); // 開始增加 jsonObject.element("student", jsonArray); // 列印:5 System.out.println(jsonObject); } } /* 列印結果 {"username":"lwc","password":"123"} {"username":"lwc","password":"123","sex":"男"} 男 是否為陣列:false 是否為空:false 是否為空物件:false {"username":"lwc","password":"123","sex":"男","student":["lwc","nxj"]} */
JSONArray
package com.itlwc.test; import net.sf.json.JSONArray; import net.sf.json.JSONObject; public class Test { public static void main(String[] args) { //建立JSONArray JSONArray jsonArray = new JSONArray(); jsonArray.add(0, "lwc"); jsonArray.add(1, "nxj"); jsonArray.element("mxj"); //列印:1 System.out.println(jsonArray); //根據下標返回,列印:2 System.out.println(jsonArray.get(0)); //根據下標設定新值,列印:3 jsonArray.set(0, "itlwc"); System.out.println(jsonArray); //把JSONObject放入到JSONArray中 JSONObject jsonObject = new JSONObject(); jsonObject.put("username", "lwc"); jsonObject.put("password", "123"); //開始增加,列印:4 jsonArray.add(jsonObject); System.out.println(jsonArray); //遍歷,列印:5 for(int i=0;i<jsonArray.size();i++){ System.out.print(jsonArray.get(i)+"\t"); } } } /* 列印結果 ["lwc","nxj","mxj"] lwc ["itlwc","nxj","mxj"] ["itlwc","nxj","mxj",{"username":"lwc","password":"123"}] itlwc nxj mxj {"username":"lwc","password":"123"} */
JavaBean與json字串互轉
package com.itlwc.test; import net.sf.json.JSONObject; import com.itlwc.entity.Student; public class Test { public static void main(String[] args) { // JavaBean物件轉json字串 Student stu1 = new Student("lwc", "111111"); JSONObject jsonObject = JSONObject.fromObject(stu1); System.out.println(jsonObject); // json字串轉JavaBean String jsondata = "{\"password\":\"111111\",\"username\":\"lwc\"}"; JSONObject jsonObject1 = JSONObject.fromObject(jsondata); Student stu2 = (Student) JSONObject.toBean(jsonObject1, Student.class); System.out.println(stu2); } } /* 列印結果: {"password":"111111","username":"lwc"} 使用者: lwc 密碼:111111 */
List與json字串互轉
package com.itlwc.test;
import java.util.ArrayList;
import java.util.List;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import com.itlwc.entity.Student;
public class Test {
public static void main(String[] args) {
// List轉json字串
List list = new ArrayList();
list.add(new Student("lwc", "111111"));
list.add(new Student("nxj", "222222"));
JSONArray jsonArray = JSONArray.fromObject(list);
System.out.println(jsonArray);
// json字串轉List
List list1 = new ArrayList();
String jsondata = "[{\"password\":\"111111\",\"username\":\"lwc\"},{\"password\":\"222222\",\"username\":\"nxj\"}]";
JSONArray jsonArray1 = JSONArray.fromObject(jsondata);
for (int i = 0; i < jsonArray1.size(); i++) {
JSONObject jsonObject2 = jsonArray1.getJSONObject(i);
Student stu2 = (Student) JSONObject.toBean(jsonObject2,
Student.class);
list1.add(stu2);
}
System.out.println(list1);
}
}
/*
列印結果:
[{"password":"111111","username":"lwc"},{"password":"222222","username":"nxj"}]
[使用者: lwc 密碼:111111, 使用者: nxj 密碼:222222]
*/Map與json字串互轉
package com.itlwc.test;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import net.sf.json.JSONObject;
import com.itlwc.entity.Student;
public class Test {
public static void main(String[] args) {
// Map轉json字串
Map map = new HashMap();
map.put("1", new Student("lwc", "111111"));
map.put("2", new Student("nxj", "222222"));
JSONObject jsonMap = JSONObject.fromObject(map);
System.out.println(jsonMap);
// json字串轉Map
String jsondata = "{\"2\":{\"password\":\"222222\",\"username\":\"nxj\"},\"1\":{\"password\":\"111111\",\"username\":\"lwc\"}}";
Map map1 = (Map) JSONObject.fromObject(jsondata);
Set set = map1.keySet();
Iterator ite = set.iterator();
while (ite.hasNext()) {
String key = (String) ite.next();
JSONObject jsonObject = JSONObject.fromObject(map1.get(key));
Student stu = (Student) JSONObject
.toBean(jsonObject, Student.class);
System.out.println(key + " " + stu);
}
}
}
/*
列印結果:
{"2":{"password":"222222","username":"nxj"},"1":{"password":"111111","username":"lwc"}}
2 使用者: nxj 密碼:222222
1 使用者: lwc 密碼:111111
*/JSONArray與List互轉
package com.itlwc.test;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import net.sf.json.JSONArray;
import net.sf.json.JsonConfig;
import com.itlwc.entity.Student;
public class Test {
public static void main(String[] args) {
//List轉型JSONArray
List<Student> list = new ArrayList<Student>();
list.add(new Student("lwc", "111111"));
list.add(new Student("nxj", "222222"));
JSONArray jsonArray = JSONArray.fromObject(list);
System.out.println(jsonArray.toString());
//JSONArray轉型List
List<Student> list2 = JSONArray.toList(jsonArray, new Student(), new JsonConfig());
Iterator<Student> ite = list2.iterator();
while(ite.hasNext()){
Student stu =ite.next();
System.out.println(stu);
}
}
}
/*
列印結果
[{"password":"111111","username":"lwc"},{"password":"222222","username":"nxj"}]
使用者: lwc 密碼:111111
使用者: nxj 密碼:222222
*/JSONArray與陣列互轉
package com.itlwc.test;
import net.sf.json.JSONArray;
public class Test {
public static void main(String[] args) {
// Java陣列轉JSONArray
boolean[] boolArray = new boolean[] { true, false, true };
JSONArray jsonArray = JSONArray.fromObject(boolArray);
System.out.println(jsonArray.toString());
// JSONArray轉Java陣列
Object obj[] = jsonArray.toArray();
for (Object o : obj) {
System.out.print(o + " ");
}
}
}
/*
列印結果 :
[true,false,true]
true false true
*/XML與JSON互轉
需要匯入xom-1.1.jarpackage com.itlwc.test;
import net.sf.json.JSON;
import net.sf.json.JSONObject;
import net.sf.json.xml.XMLSerializer;
public class Test {
public static void main(String[] args) throws Exception {
// XML轉JSON
String xml = "<root>" + "<name type='type'>zhaipuhong</name>"
+ "<gender>male</gender>" + "<birthday>" + "<year>1970</year>"
+ "<month>12</month>" + "<day>17</day>" + "</birthday>"
+ "</root>";
XMLSerializer xmlSerializer = new XMLSerializer();
JSON json = xmlSerializer.read(xml);
System.out.println(json.toString(2));
// JSON轉XML
String jsondata = "{\"root\":{" + "\"name\":\"zhaipuhong\","
+ "\"gender\":\"male\"," + "\"birthday\":{"
+ "\"year\":\"1970\"," + "\"month\":\"12\"," + "\"day\":\"17\""
+ "}" + "}" + "}";
JSONObject jsonObject = JSONObject.fromObject(jsondata);
String xmlstr = new XMLSerializer().write(jsonObject);
System.out.println(xmlstr);
}
}
/*
列印結果:
{
"name": "zhaipuhong",
"gender": "male",
"birthday": {
"year": "1970",
"month": "12",
"day": "17"
}
}
<?xml version="1.0" encoding="UTF-8"?>
<o>
<root class="object">
<birthday class="object">
<day type="string">17</day>
<month type="string">12</month>
<year type="string">1970</year>
</birthday>
<gender type="string">male</gender>
<name type="string">zhaipuhong</name>
</root>
</o>
*/