1 public class TestReflectApp { 2 3 public static void main(String[] args) throws Exception { 4 // 5 InputStream is = new FileInputStream("D:\eclipse-workspace-bigdata4\Java25\src\objects.properties"); 6 // byte[] bytes = new byte[is.available()]; 7 // is.read(bytes); 8 // //is.close(); 9 //System.out.println(new String(bytes));//注意读取的话出现读到文件末尾,后面进行加载的话内容为空 10 Properties prop = new Properties(); 11 prop.load(is); 12 13 // 14 String objClass = prop.getProperty("object.class"); 15 Class clazz = Class.forName(objClass); 16 Object obj = clazz.newInstance(); 17 18 //name
//取值 19 String propName = prop.getProperty("object.prop1.name"); 20 String propValue = prop.getProperty("object.prop1.value");
//得到name字段 21 Field f = clazz.getDeclaredField(propName); 22 if(f.getType() == String.class){ 23 f.setAccessible(true); 24 f.set(obj, propValue); 25 } 26 27 28 //age 29 propName = prop.getProperty("object.prop2.name"); 30 propValue = prop.getProperty("object.prop2.value"); 31 f = clazz.getDeclaredField(propName); 32 if(f.getType() == int.class){ 33 f.setAccessible(true); 34 Integer i = Integer.parseInt(propValue) ; 35 f.set(obj, i); 36 } 37 38 } 39 40 }
2、文本文件(放在根目录下)
文件名:objects.properties
object.class=com.it18zhang.java25.Person
object.prop1.name=name
object.prop1.value=tomas
object.prop2.name=age
object.prop2.value=20