Rebuild code and add default filter.

burp/file/RemoveContent.java

@@ -0,0 +1,22 @@
+package burp.file;
+
+import javax.swing.JOptionPane;
+
+import org.json.JSONObject;
+
+public class RemoveContent {
+	WriteFile w = new WriteFile();
+	ReadFile r = new ReadFile();
+	/*
+	 * 删除某文件内容
+	 */
+	public void removeFileContent(String key, String configFilePath) {
+		String jsonStr = r.readFileContent(configFilePath);
+		JSONObject jsonObj = new JSONObject(jsonStr);
+		jsonObj.remove(key);
+		
+		if (w.writeFileContent(configFilePath, jsonObj.toString())) {
+			JOptionPane.showMessageDialog(null, "Delete Successfully!", "Info", JOptionPane.INFORMATION_MESSAGE);
+		}
+	}
+}