alibaba-FastJSON Demo

public class JsonTest {
public static void main(String[] args) throws IOException, Exception {
/*
 * 1.將指定的 JavaBean對象解析成Json字符串
 */
Person p1 = new Person("zhangsan", 22, 1332117);
System.out.println(JSON.toJSONString(p1)); // 字段的get屬性


/*
 * 2.將封裝了javaBean對象的集合解析成json字符串,並對該數據進行過濾
 */
ValueFilter valueFilter = new ValueFilter() {
@Override
public Object process(Object source, String name, Object value) {
if (value.equals("lisi")) {
return "**敏感詞彙**";
}
return value;
}
};
List<Person> list = new ArrayList<Person>();
list.add(new Person("lisi", 19, 159785));
list.add(new Person("wangwu", 10, 113123213));
list.add(new Person("zhaoliu", 29, 1444785));
System.out.println(JSON.toJSONString(list, valueFilter));


/*
 * 3.將List<Map<String, Person>>集合 轉換爲json字符串
 */
List<Map<String, Person>> list2 = new ArrayList<Map<String, Person>>();


Map<String, Person> map1 = new HashMap<String, Person>();
map1.put("001", new Person("wangwu", 19, 159785));
map1.put("002", new Person("lisi", 19, 159785));
map1.put("003", new Person("lisi", 19, 159785));
Map<String, Person> map2 = new HashMap<String, Person>();
map2.put("001", new Person("zhaoliu", 19, 159785));
map2.put("002", new Person("lisi", 19, 159785));
map2.put("003", new Person("lisi", 19, 159785));
list2.add(map1);
list2.add(map2);
System.out.println(JSON.toJSONString(list2));


/*
 * 4.將指定的字符串解析成 指定的javaBean對象(使用泛型)
 */
Person p2 = JSON.parseObject(Person.getUtil(1), Person.class); // 字段的set屬性


/*
 * 5.將指定的字符串解析成 封裝了指定javaBean對象的集合
 */
// 方法一：
List<Person> list1 = JSON.parseArray(Person.getUtil(2), Person.class);
// 方法二：
List<Person> list4 = JSON.parseObject(Person.getUtil(2), new TypeReference<List<Person>>(){});


/*
 * 6.將json字符串 解析成 List<Map<String, Person>>集合 ，注意Type類型的定義
 */
// 關鍵type類型
List<Map<String, Person>> list3 = JSON.parseObject(Person.getUtil(3),new TypeReference<List<Map<String, Person>>>(){});


/*
 * 7.將json字符串解析爲 JsonObject對象， 因爲該對象繼承了map，能夠獲得鍵值對
 */
JSONObject object = (JSONObject) JSON.parse(Person.getUtil(1));
System.out.println("name:" + object.getString("name"));
System.out.println("age:" + object.getIntValue("age"));
System.out.println("number:" + object.getIntValue("number"));


/*
 * 8.name過濾器，只能對name進行更新,無論是否顯示
 */
NameFilter filter = new NameFilter() {
@Override
public String process(Object source, String name, Object value) {
// source是當前對象， name是key， value實在值
if ("age".equals(name)) {
return "AGE";
}
return name;
// {"age":22,"name":"zhangsan","number":1332117} //過濾前
// {"AGE":22,"name":"zhangsan","number":1332117} //過濾後
}
};


JSONSerializer jsonSerializer = new JSONSerializer();
jsonSerializer.getNameFilters().add(filter); // 經過增長一個過濾器，爲name和值進行過濾
jsonSerializer.write(p1);
System.out.println(jsonSerializer.toString());


/*
 * 9.屬性過濾器PropertyFilter，知足要求的能夠不作顯示
 */
PropertyFilter propertyFilter = new PropertyFilter() {
@Override
public boolean apply(Object source, String name, Object value) {
if ("age".equals(name)) {
return true;
}
return false;
}
};

JSONSerializer jsonSerializer2 = new JSONSerializer();
jsonSerializer2.getPropertyFilters().add(propertyFilter);
jsonSerializer2.write(list);
System.out.println(jsonSerializer2.toString());


/*
 * 10.值過濾器ValueFilter，對知足要求的能夠不作顯示
 */
ValueFilter valueFilter2 = new ValueFilter() {
@Override
public Object process(Object source, String name, Object value) {
if (value.equals(10)) {
return null;
}
return value;
}
};


JSONSerializer jsonSerializer3 = new JSONSerializer();
jsonSerializer3.getValueFilters().add(valueFilter2);
jsonSerializer3.write(list);
System.out.println(jsonSerializer3.toString());


/*
 * 11.在本地路徑下讀取文件的json字符串信息，獲得數據並賦值javaBean對象
 */
JSONReader reader = new JSONReader(new FileReader("c:\\1.txt"));
//	注意type的使用
List<Person> list10 = reader.readObject(new TypeReference<List<Person>>() {}.getType()); 
reader.close();

/*
 * 12.將Object對象保存至本地路徑中，保存爲json字符串
 */
JSONWriter writer = new JSONWriter(new FileWriter("c:\\2.txt"));
writer.writeObject(list10); 
writer.close();
 
/*
 * 13.在網絡上獲取json數據，並保存爲對應的javaBean對象信息
 */
List<Person> list11 = null;
URL url = new URL("http://192.168.117.114:8080/Test/My");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(3000);
if (conn.getResponseCode() == 200) {
InputStream in = conn.getInputStream();
//	經過JsonReader類獲得發出的輸出流對象
JSONReader reader2 = new JSONReader(new InputStreamReader(in));
//	獲得Object對象
list11 = reader2.readObject(new TypeReference<List<Person>>(){}.getType());
}
for (Person p : list11) {
System.out.println(p);
}


/*
 * 14.將客戶端的javaBean對象，上傳至服務器
 */
byte[] bytes = JSON.toJSONBytes(list11);
URL url2 = new URL("http://192.168.117.114:8080/Test/My");
HttpURLConnection conn2 = (HttpURLConnection) url2.openConnection();
conn2.setRequestMethod("POST");
conn2.setConnectTimeout(3000);
conn2.setRequestProperty("content-length", String.valueOf(bytes.length));
conn2.setRequestProperty("content-type","application/x-www-form-urlencoded");
conn2.setDoOutput(true);
OutputStream os = conn2.getOutputStream();
os.write(bytes, 0, bytes.length);
os.close();
if (conn2.getResponseCode() == 200) {
System.out.println("上傳成功！ ");
}
}

//////////////////////22222222
//	 SerialFeature 字段詳細用法
}


class Person {
public static String getUtil(int type) {
switch (type) {
case 1:
return new String(
"{\"ag\te\":22,\"name\":\"zhangsan\",\"number\":1332117}");
case 2:
return new String(
"[{\"age\":19,\"name\":\"lisi\",\"number\":159785},"
+ "{\"age\":10,\"name\":\"wangwu\",\"number\":113123213},"
+ "{\"age\":29,\"name\":\"zhaoliu\",\"number\":1444785}]");
case 3:
return new String(
"[{\"001\":{\"age\":19,\"name\":\"lisi\",\"number\":159785},"
+ "\"002\":{\"age\":19,\"name\":\"wangwu\",\"number\":159785},"
+ "\"003\":{\"age\":19,\"name\":\"lisi\",\"number\":159785}},"
+ "{\"001\":{\"age\":23,\"name\":\"lisi\",\"number\":159785},"
+ "\"002\":{\"age\":19,\"name\":\"lisi\",\"number\":159785},"
+ "\"003\":{\"age\":19,\"name\":\"lisi\",\"number\":159785}}]");
}
return null;
}
private String name;
private int age;
private int number;


public Person() {
super();
}
public Person(String name, int age, int number) {
super();
this.name = name;
this.age = age;
this.number = number;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public int getNumber() {
return number;
}
public void setNumber(int number) {
this.number = number;
}
@Override
public String toString() {
return "Person [age=" + age + ", name=" + name + ", number=" + number + "]";
}
}