write a line into test.file

docs/spring/csfecd3f42-94a0-11ee-bc22-acde48001122.java

@@ -0,0 +1,17 @@
+package com.huifer.struts.action;
+
+import com.opensymphony.xwork2.ActionSupport;
+
+/**
+ * 描述:
+ *
+ * @author huifer
+ * @date 2019-02-21
+ */
+public class ActionThree extends ActionSupport {
+    @Override
+    public String execute() throws Exception {
+        System.out.println("action three");
+        return null;
+    }
+}

docs/spring/csff10efbc-94a0-11ee-bc22-acde48001122.java

@@ -0,0 +1,18 @@
+package com.huifer.bilibili.inteface;
+
+interface IHello {
+    void hello();
+}
+
+class HelloImpl implements IHello {
+    public void hello() {
+        System.out.println("hello");
+    }
+}
+
+public class InterfaceDemo {
+    public static void main(String[] args) {
+        HelloImpl hello = new HelloImpl();
+        hello.hello();
+    }
+}

docs/spring/csff509702-94a0-11ee-bc22-acde48001122.java

@@ -0,0 +1,15 @@
+package com.huifer.design.adapter.ChaTou;
+
+/**
+ * 描述:
+ * 国内插头的实现
+ *
+ * @author huifer
+ * @date 2019-03-13
+ */
+public class ChinaChaImpl implements ChinaCha {
+    @Override
+    public void method() {
+        System.out.println("国内插头");
+    }
+}