diff --git a/src/main/java/com/fanruan/api/err/TableDataException.java b/src/main/java/com/fanruan/api/err/TableDataException.java
new file mode 100644
index 0000000..aa222be
--- /dev/null
+++ b/src/main/java/com/fanruan/api/err/TableDataException.java
@@ -0,0 +1,14 @@
+package com.fanruan.api.err;
+
+/**
+ * 和数据集工具有关的异常
+ * */
+public class TableDataException extends com.fr.general.data.TableDataException{
+    public TableDataException(String msg){
+        super(msg);
+    }
+
+    public TableDataException (String msg, Throwable error){
+        super(msg, error);
+    }
+}
diff --git a/src/main/java/com/fanruan/api/plugin/PluginKit.java b/src/main/java/com/fanruan/api/plugin/PluginKit.java
new file mode 100644
index 0000000..d591197
--- /dev/null
+++ b/src/main/java/com/fanruan/api/plugin/PluginKit.java
@@ -0,0 +1,26 @@
+package com.fanruan.api.plugin;
+
+import com.fr.plugin.ExtraClassManager;
+import com.fr.stable.fun.mark.Mutable;
+
+import java.util.Set;
+
+public class PluginKit {
+    /**
+     * 返回指定集合的不可变数组
+     * @param string 字符串
+     * @return 数组
+     * */
+    public <T extends Mutable> Set<T> getArray(String string) {
+        return ExtraClassManager.getInstance().getArray(string);
+    }
+
+    /**
+     * 返回指定集合的不可变数组
+     * @param string 字符串
+     * @return 数组
+     * */
+    public <T extends Mutable> Set<T> getArray(String string, Mutable m) {
+        return ExtraClassManager.getInstance().getArray(string, m);
+    }
+}
diff --git a/src/test/java/com/fanruan/api/plugin/PluginKitTest.java b/src/test/java/com/fanruan/api/plugin/PluginKitTest.java
new file mode 100644
index 0000000..4c8a72f
--- /dev/null
+++ b/src/test/java/com/fanruan/api/plugin/PluginKitTest.java
@@ -0,0 +1,13 @@
+package com.fanruan.api.plugin;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class PluginKitTest {
+    @Test
+    public void getArray(){
+        PluginKit p1 = new PluginKit();
+        TestExtraClass p2 = new TestExtraClass();
+        Assert.assertEquals(p1.getArray("abcd"), p2.getArray("abcd"));
+    }
+}
diff --git a/src/test/java/com/fanruan/api/plugin/TestExtraClass.java b/src/test/java/com/fanruan/api/plugin/TestExtraClass.java
new file mode 100644
index 0000000..f81ed57
--- /dev/null
+++ b/src/test/java/com/fanruan/api/plugin/TestExtraClass.java
@@ -0,0 +1,12 @@
+package com.fanruan.api.plugin;
+import com.fr.plugin.injectable.PluginSingleInjection;
+
+public class TestExtraClass extends com.fr.plugin.AbstractExtraClassManager{
+    protected boolean mountSpecific(PluginSingleInjection injection){
+        return true;
+    }
+
+    protected boolean demountSpecific(PluginSingleInjection injection){
+        return true;
+    }
+}
diff --git a/src/test/java/com/fanruan/api/util/ArrayKitTest.java b/src/test/java/com/fanruan/api/util/ArrayKitTest.java
index 054ae22..715ecfd 100644
--- a/src/test/java/com/fanruan/api/util/ArrayKitTest.java
+++ b/src/test/java/com/fanruan/api/util/ArrayKitTest.java
@@ -3,7 +3,6 @@ package com.fanruan.api.util;
 import com.fanruan.api.Prepare;
 import java.util.*;
 
-import com.fr.third.org.apache.poi.hssf.record.formula.functions.Int;
 import org.junit.Assert;
 import org.junit.Test;