java中Array/List/Map/Object与Json互相转换详解(二)
//javaObject和jsonObject互转
javaObjectAndJsonInterChange();
}
/**
* javaArray和json互相转换
*/
public static void javaArrayAndJsonInterChange() {
// java 转数组
boolean[] boolArray = new boolean[] { true, false, true };
JSONArray jsonArray = JSONArray.fromObject(boolArray);
String s = jsonArray.toString();
System.out.println(s);
// 通过json获取数组中的数据
String result = readJson("configdata");
JSONArray jsonR = JSONArray.fromObject(result);
int size = jsonR.size();
for (int i = 0; i < size; i++) {
System.out.println(jsonR.get(i));
}
}
/**
* javaList和json互相转换
*/
public static void javaListAndJsonInterChange() {
List list = new ArrayList();
list.add(new Integer(1));
list.add(new Boolean(true));
list.add(new Character('j'));
list.add(new char[] { 'j', 's', 'o', 'n' });
list.add(null);
list.add("json");
list.add(new String[] { "json", "-", "lib" });
// list转JSONArray
JSONArray jsArr = JSONArray.fromObject(list);
System.out.println(jsArr.toString(4));
// 从JSON串到JSONArray
jsArr = JSONArray.fromObject(jsArr.toString());
// --从JSONArray里读取
// print: json
System.out.println(((JSONArray) jsArr.get(6)).get(0));
}
/**
* javaMpa和Json互转
*/
public static void javaMapAndJsonInterChange() {
Map map = new LinkedHashMap();
map.put("integer", new Integer(1));
map.put("boolean", new Boolean(true));
map.put("char", new Character('j'));
map.put("charArr", new char[] { 'j', 's', 'o', 'n' });
// 注:不能以null为键名，否则运行报net.sf.json.JSONException:
// java.lang.NullPointerException:
// JSON keys must not be null nor the 'null' string.
map.put("nullAttr", null);
map.put("str", "json");
map.put("strArr", new String[] { "json", "-", "lib" });
map.put("jsonFunction", new JSONFunction(new String[] { "i" },"alert(i)"));
map.put("address", new Address("P.O BOX 54534", "Seattle, WA", 42452,"561-832-3180", "531-133-9098"));
// map转JSONArray
JSONObject jsObj = JSONObject.fromObject(map);
System.out.println(jsObj.toString(4));
// 从JSON串到JSONObject
jsObj = JSONObject.fromObject(jsObj.toString());
//第一种方式：从JSONObject里读取
// print: json
System.out.println(jsObj.get("str"));
// print: address.city = Seattle, WA
System.out.println("address.city = " + ((JSONObject) jsObj.get("address")).get("city"));
//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，感觉没有多大用处
MorphDynaBean mdBean = (MorphDynaBean) JSONObject.toBean(jsObj);
// print: json
System.out.println(mdBean.get("str"));
//print: address.city = Seattle, WA
System.out.println("address.city = " + ((MorphDynaBean) mdBean.get("address")).get("city"));
}
/**
* javaObject和jsonObject互转
*/
public static void javaObjectAndJsonInterChange(){
Address address=new Addr