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net.sf.json
时间:
2015-07-15 16:41:25
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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需要导入的包
JSONObject
[java]
view plain
copy
package com.itlwc.test;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public
class Test {
public
static
void main(String[] args) {
// 创建JSONObject
JSONObject jsonObject =
new JSONObject();
jsonObject.put(
"username",
"lwc");
jsonObject.put(
"password",
"123");
// 打印:1
System.out.println(jsonObject);
// 增加属性,打印:2
jsonObject.element(
"sex",
"男");
System.out.println(jsonObject);
// 根据key返回,打印:3
System.out.println(jsonObject.get(
"sex"));
// 判读输出对象的类型
boolean isArray = jsonObject.isArray();
boolean isEmpty = jsonObject.isEmpty();
boolean isNullObject = jsonObject.isNullObject();
// 打印:4
System.out.println(
"是否数组:" + isArray +
" 是否空:" + isEmpty +
" 是否空对象:"
+ isNullObject);
// 把JSONArray增加到JSONObject中
JSONArray jsonArray =
new JSONArray();
jsonArray.add(
0,
"lwc");
jsonArray.add(
1,
"nxj");
// 开始增加
jsonObject.element(
"student", jsonArray);
// 打印:5
System.out.println(jsonObject);
}
}
/*
打印结果
{"username":"lwc","password":"123"}
{"username":"lwc","password":"123","sex":"男"}
男
是否为数组:false 是否为空:false 是否为空对象:false
{"username":"lwc","password":"123","sex":"男","student":["lwc","nxj"]}
*/
JSONArray
[java]
view plain
copy
package com.itlwc.test;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public
class Test {
public
static
void main(String[] args) {
//创建JSONArray
JSONArray jsonArray =
new JSONArray();
jsonArray.add(
0,
"lwc");
jsonArray.add(
1,
"nxj");
jsonArray.element(
"mxj");
//打印:1
System.out.println(jsonArray);
//根据下标返回,打印:2
System.out.println(jsonArray.get(
0));
//根据下标设置新值,打印: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");
//开始增加,打印:4
jsonArray.add(jsonObject);
System.out.println(jsonArray);
//遍历,打印:5
for(
int i=
0;i<jsonArray.size();i++){
System.out.print(jsonArray.get(i)+
"\t");
}
}
}
/*
打印结果
["lwc","nxj","mxj"]
lwc
["itlwc","nxj","mxj"]
["itlwc","nxj","mxj",{"username":"lwc","password":"123"}]
itlwc nxj mxj {"username":"lwc","password":"123"}
*/
JavaBean与json字符串互转
[java]
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copy
package com.itlwc.test;
import net.sf.json.JSONObject;
import com.itlwc.entity.Student;
public
class Test {
public
static
void main(String[] args) {
// JavaBean对象转json字符串
Student stu1 =
new Student(
"lwc",
"111111");
JSONObject jsonObject = JSONObject.fromObject(stu1);
System.out.println(jsonObject);
// json字符串转JavaBean
String jsondata =
"{\"password\":\"111111\",\"username\":\"lwc\"}";
JSONObject jsonObject1 = JSONObject.fromObject(jsondata);
Student stu2 = (Student) JSONObject.toBean(jsonObject1, Student.
class);
System.out.println(stu2);
}
}
/*
打印结果:
{"password":"111111","username":"lwc"}
用户: lwc 密码:111111
*/
List与json字符串互转
[java]
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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转json字符串
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字符串转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);
}
}
/*
打印结果:
[{"password":"111111","username":"lwc"},{"password":"222222","username":"nxj"}]
[用户: lwc 密码:111111, 用户: nxj 密码:222222]
*/
Map与json字符串互转
[java]
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copy
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转json字符串
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字符串转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);
}
}
}
/*
打印结果:
{"2":{"password":"222222","username":"nxj"},"1":{"password":"111111","username":"lwc"}}
2 用户: nxj 密码:222222
1 用户: lwc 密码:111111
*/
JSONArray与List互转
[java]
view plain
copy
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转型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转型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);
}
}
}
/*
打印结果
[{"password":"111111","username":"lwc"},{"password":"222222","username":"nxj"}]
用户: lwc 密码:111111
用户: nxj 密码:222222
*/
JSONArray与数组互转
[java]
view plain
copy
package com.itlwc.test;
import net.sf.json.JSONArray;
public
class Test {
public
static
void main(String[] args) {
// Java数组转JSONArray
boolean[] boolArray =
new
boolean[] {
true,
false,
true };
JSONArray jsonArray = JSONArray.fromObject(boolArray);
System.out.println(jsonArray.toString());
// JSONArray转Java数组
Object obj[] = jsonArray.toArray();
for (Object o : obj) {
System.out.print(o +
" ");
}
}
}
/*
打印结果 :
[true,false,true]
true false true
*/
XML与JSON互转
需要导入xom-1.1.jar
[java]
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copy
package 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转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转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);
}
}
/*
打印结果:
{
"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>
*/
net.sf.json
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原文地址:http://www.cnblogs.com/zhenxi/p/4648555.html
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