content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.metrics.os.utils;
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.FileReader;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
  
  public class FileUtils {
  
      /**
       * Read the content of file
       * @param path the path to file
       * @return the file content as string
       */
      public static String readFile(String path) {
          BufferedReader reader = null;
          StringBuffer sb = new StringBuffer();
          try {
              reader = new BufferedReader(new FileReader(new File(path)));
              String line;
              while ((line = reader.readLine()) != null) {
                  sb.append(line + "\n");
              }
          } catch (Exception e) {
              return e.getMessage();
          } finally {
              if (reader != null) {
                  try {
                      reader.close();
                  } catch (IOException e) {
                      // ignore
                  }
              }
          }
          return sb.toString();
      }
  
      /**
       * Read the content of file
       * @param path the path to file
       * @return the file content as string
       */
      public static List<String> readFileAsStringArray(String path) throws IOException {
          BufferedReader reader = null;
          List<String> lines = new ArrayList<String>();
          try {
              File p = new File(path);
              if (!p.exists()) {
                  return lines;
              }
              reader = new BufferedReader(new FileReader(new File(path)));
              String line;
              while ((line = reader.readLine()) != null) {
                  lines.add(line);
              }
          } finally {
              if (reader != null) {
                  try {
                      reader.close();
                  } catch (IOException e) {
                      // ignore
                  }
              }
          }
          return lines;
      }
  }
  