泛型参数化

coderzyj · coderzyj · commit 4474515b30e7 · 2018-11-25T12:44:27.000+08:00
diff --git a/java-reflect/src/com/zyj/reflect/Demo03.java b/java-reflect/src/com/zyj/reflect/Demo03.java
@@ -41,7 +41,6 @@ public static void main(String[] args) throws IllegalAccessException, Instantiat
             field.set(u4,"张勇杰3");
             System.out.println(u4.getName());
             //通过反射API操作属性
-            SimpleDateFormat
         } catch (ClassNotFoundException e) {
             e.printStackTrace();
         }
diff --git a/java-reflect/src/com/zyj/reflect/Demo04.java b/java-reflect/src/com/zyj/reflect/Demo04.java
@@ -0,0 +1,42 @@
+package com.zyj.reflect;
+
+import com.zyj.bean.User;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * 版权声明：CopyRight (c) 2018 ucarinc. All Rights Reserved.
+ *
+ * @author : 张勇杰
+ * @date : 2018/11/25 12:34
+ * @Version : v1.0
+ * @description
+ **/
+public class Demo04 {
+    public void test01(Map<String,User> map, List<User> list){
+        System.out.println("Demo04.test01");
+    }
+
+    public Map<Integer,User> test02(){
+        System.out.println("Demo04.test02");
+        return null;
+    }
+
+    public static void main(String[] args) throws NoSuchMethodException {
+        Method m1 = Demo04.class.getMethod("test01",Map.class,List.class);
+        Type []types = m1.getGenericParameterTypes();
+        for(Type paramType:types){
+            System.out.println("#"+paramType);
+            if(paramType instanceof ParameterizedType){
+                Type[] genericTypes = ((ParameterizedType) paramType).getActualTypeArguments();
+                for(Type genericType:genericTypes){
+                    System.out.println("泛型类型"+genericType);
+                }
+            }
+        }
+    }
+}

Original file line number	Diff line number	Diff line change
`@@ -41,7 +41,6 @@ public static void main(String[] args) throws IllegalAccessException, Instantiat`
`41`	`41`	`field.set(u4,"张勇杰3");`
`42`	`42`	`System.out.println(u4.getName());`
`43`	`43`	`//通过反射API操作属性`
`44`		`- SimpleDateFormat`
`45`	`44`	`} catch (ClassNotFoundException e) {`
`46`	`45`	`e.printStackTrace();`
`47`	`46`	`}`