add GetPackage directive

src/com/github/hykes/codegen/directive/GetPackage.java

@@ -0,0 +1,41 @@
+package com.github.hykes.codegen.directive;
+
+import org.apache.velocity.context.InternalContextAdapter;
+import org.apache.velocity.exception.MethodInvocationException;
+import org.apache.velocity.exception.ParseErrorException;
+import org.apache.velocity.exception.ResourceNotFoundException;
+import org.apache.velocity.runtime.directive.Directive;
+import org.apache.velocity.runtime.parser.node.Node;
+
+import java.io.IOException;
+import java.io.Writer;
+
+/**
+ * 拼接元素
+ * ${Append '#' 'ABC' '%'}  => #ABC%
+ * @author [email protected]
+ * @date 2017/12/19
+ */
+public class GetPackage extends Directive {
+    @Override
+    public String getName() {
+        return "GetPackage";
+    }
+
+    @Override
+    public int getType() {
+        return LINE;
+    }
+
+    @Override
+    public boolean render(InternalContextAdapter context, Writer writer, Node node) throws IOException, ResourceNotFoundException, ParseErrorException, MethodInvocationException {
+        String clazz = (String) node.jjtGetChild(0).value(context);
+        if (context.containsKey(clazz)) {
+            String packagePath = context.get(clazz).toString();
+            packagePath = new StringBuilder("").append(packagePath).toString();
+            writer.write(packagePath);
+            return true;
+        }
+        return false;
+    }
+}

src/com/github/hykes/codegen/utils/VelocityUtil.java

@@ -29,6 +29,7 @@ public class VelocityUtil {
         VELOCITY_ENGINE.loadDirective("com.github.hykes.codegen.directive.Append");
         VELOCITY_ENGINE.loadDirective("com.github.hykes.codegen.directive.Split");
         VELOCITY_ENGINE.loadDirective("com.github.hykes.codegen.directive.ImportPackage");
+        VELOCITY_ENGINE.loadDirective("com.github.hykes.codegen.directive.GetPackage");
         Thread.currentThread().setContextClassLoader(classLoader);
     }