Javeweb Study notes Two

1. Get Properties by Reflection:
Class:

public class Student {        public Student( ){        System.out.println("public Student()");    }    private void haha(){        System.out.println("private void haha()");    }}

Configuration file

Class.properties

Classname=day01.student
Methodname=haha

Get method

//加载属性文件，取得类名的方法名  Properties props = new Properties();  InputStream is = new FileInputStream("src/Day01/class.properties");props.load(is);  String className = props.getProperty("className").trim();  String methodName = props.getProperty("methodName").trim();  //通过反射，执行该类的方法  Class c = Class.forName(className);  Constructor con = c.getConstructor(null);  Method m = c.getDeclaredMethod(methodName,null);m.setAccessible(true); //方式属性是私有 ，如果是私有必须加上m.invoke(con.newInstance(null),null);

Results:

public Student()private void haha()

Javeweb Study notes Two