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xiachaochao · xiachaochao · commit 640028e25690 · 2017-04-11T19:32:13.000+08:00
diff --git a/JavaBase/reflect/GetConstructorDemo.java b/JavaBase/reflect/GetConstructorDemo.java
@@ -0,0 +1,66 @@
+package com._520it.reflect;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Method;
+
+class User {
+	public User() 		
+	{
+		System.out.println("无参构造器");
+	}
+
+	public User(String name) {
+		System.out.println("含有name的构造器");
+	}
+
+	 private User(String name, int age) {
+		 System.out.println("有参构造器"+name+age);
+	}
+	 public void doWork(){
+		 System.out.println("doWork方法");
+	 }
+}
+
+public class GetConstructorDemo {
+	public static void main(String[] args) throws Exception {
+	getOne();
+	}
+
+	public static void getOne() throws Exception {
+		Class<?> clazz=Person.class;//第一种方式
+		//Class<?> clazz1=Class.forName("com._520it.reflect.User");//第二种方式
+		//Class<?> clazz2=(new User().getClass());//第三种方式
+		System.out.println(clazz);
+		System.out.println("获取多个构造器");
+		System.out.println("---------------------------------------------");
+		Constructor[] con=clazz.getDeclaredConstructors();//getDeclaredConstructors表示的类声明的所有构造方法。
+		for(Constructor c1:con){
+			System.out.println(c1);
+		}
+		System.out.println("---------------------------------------------");
+		con=clazz.getConstructors();//表示的类或接口声明的所有方法
+		for(Constructor c2:con){
+			System.out.println(c2);
+		}
+
+		System.out.println("---------------------------------------------");
+		System.out.println("获取单个构造器");
+		Constructor c3=clazz.getConstructor();
+		Method method=clazz.getMethod("doWork");
+		System.out.println(c3.newInstance());
+		
+		System.out.println(c3);
+		System.out.println("---------------------------------------------");
+		c3=clazz.getConstructor(String.class);
+		System.out.println(c3.newInstance("李华"));
+		System.out.println(c3);
+		System.out.println("---------------------------------------------");
+		c3=clazz.getDeclaredConstructor(String.class,int.class);
+		c3.setAccessible(true);//使用私有化修饰，通过反射必须先设定可见
+		System.out.println(c3.newInstance("lihua",36));
+		System.out.println(c3);
+		System.out.println("---------------------------------------------");
+		
+		
+	}
+}
diff --git a/JavaBase/reflect/RefectDemo01.java b/JavaBase/reflect/RefectDemo01.java
@@ -0,0 +1,29 @@
+package com._520it.reflect;
+
+class Person {
+	public Person() {
+		System.out.println("无参构造器");
+	}
+
+	public Person(String name) {
+		System.out.println("含有name的构造器");
+	}
+
+	private Person(String name, int age) {
+		System.out.println("有参构造器" + name + age);
+	}
+
+	public void doWork() {
+		System.out.println("doWork方法");
+	}
+}
+
+public class RefectDemo01 {
+	public static void main(String[] args) throws Exception {
+		// 三种方式获取clazz对象
+		//Class<?> c1 = Class.forName("com._520it.reflect.Person");
+		//Class<?> c2=Person.class;
+        Class<?> c3=(new Person().getClass());
+        
+	}
+}
diff --git a/JavaBase/src/com/_520it/reflect2/GetConstructorDemo.java b/JavaBase/src/com/_520it/reflect2/GetConstructorDemo.java
@@ -0,0 +1,26 @@
+package com._520it.reflect2;
+
+import java.lang.reflect.Constructor;
+
+/**
+ * 通过反射获取构造器
+ * 
+ * 需求:通过反射来获取某一个类的构造器: 
+ * 1 获取该类的字节码对象. 
+ * 2从该字节码对象中去找需要获取的构造器.
+ */
+public class GetConstructorDemo {
+
+	public static void main(String[] args) throws Exception {
+	//三种方式获取clazz类
+		Class clazz1=User.class;
+		//Class clazz2=Class.forName("com._520it.reflect2.User");//这种方式需要抛出异常
+		//Class clazz3=(new User().getClass());
+		Constructor[] con=clazz1.getConstructors();//将所有的构造器方法放置在通过constructor数组中
+		System.out.println("打印数组的长度："+con.length);
+		/*for(Constructor c1:con){
+			Syste
+		}
+*/	}
+
+}
diff --git a/JavaBase/src/com/_520it/reflect2/User.java b/JavaBase/src/com/_520it/reflect2/User.java
@@ -0,0 +1,14 @@
+package com._520it.reflect2;
+
+public class User {
+	//定义构造器
+	public User() {
+	
+	}
+	public User(String name){
+	
+	}
+	public User(String name,int age){
+		
+	}
+}
