package pkg;import java.util.Arrays;import java.util.Map;import java.util.Set;import javax.script.ScriptEngine;import javax.script.ScriptEngineManager;import javax.script.ScriptException;public class JsonUtil { public static Object[] getAsArray(String json, String code) { Object obj = get(json, code); if (obj instanceof Object[]) { return (Object[]) obj; } else { return null; } } public static Object get(String json, String code) { // Get the JavaScript engine ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine engine = manager.getEngineByName("JavaScript"); String script = "var obj = " + json + ";"; try { engine.eval(script); { Object obj = engine.eval("obj." + code); if (obj instanceof Map) { java.util.Map map = (java.util.Map) obj; Set entrySet = map.entrySet(); Object[] arr = new Object[entrySet.size()]; int n = 0; for (Object objValue : map.values()) { if (objValue instanceof String) { String sValue = (String) objValue; arr[n] = sValue; } else { arr[n] = map.get(obj); } n++; } return arr; } return obj; } } catch (ScriptException e) { e.printStackTrace(); return null; } } public static void main(String[] args) { String json = "{'test':'this is test','test2':{'test3':'value3'},'test4':['a','b','c']}"; { Object value = JsonUtil.get(json, "test"); System.out.println(value); // "this is test" } { Object value = JsonUtil.get(json, "test2.test3"); System.out.println(value); // "value3" } { Object[] value = JsonUtil.getAsArray(json, "test4"); System.out.println(Arrays.toString(value)); // ["a","b","c"] System.err.println(value.getClass()); for (int n = 0; n < value.length; n++) { System.err.println(value[n]); } } }}