去掉utf-8的Bom头：使用java以及jdbc不使用第三方库执行sql文件脚本

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package com.xxx.xxx.dao;   import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import java.sql.Statement; import java.util.ArrayList; import java.util.Arrays; import java.util.List;   import org.apache.log4j.Logger; import org.apache.log4j.PropertyConfigurator;   import com.ft.hsm.Util.ConstantValue; import com.ft.hsm.Util.StringUtil;   /*  * 使用java以及jdbc执行sql脚本的工具示例代码  */   public class SqlHelper {     private static Logger logger;       static {         logger = Logger.getLogger(ScreenDaoImpl.class);         PropertyConfigurator.configure(ConstantValue.PATH_SCREENSERVER_LOG4J_PROPERTIES);     }       public static boolean createDBFromSQLFile(String SQLPath, String SQLFileCharsetName, String dbFilePath,             int[] retRowsExpected) {         if (StringUtil.isEmpty(SQLPath) || StringUtil.isEmpty(SQLFileCharsetName) || StringUtil.isEmpty(dbFilePath)                 || 0 >= retRowsExpected.length) {             logger.error("参数错误");             return false;         }           // 检验是否己创建         File dbfile = new File(dbFilePath);         if (dbfile.exists() || dbfile.isDirectory()) {             logger.error(dbFilePath + "数据库文件己存在或存在同名文件夹");             return false;         }           // 读取SQL文件         String sql = getText(SQLPath, SQLFileCharsetName); // "UTF-8"         if (StringUtil.isEmpty(sql)) {             logger.error("读取SQL文件失败");             return false;         }           // 转换为SQL语句         List<String> sqlList = getSql(sql, SQLFileCharsetName);         for (int i = 0; i < sqlList.size(); i++) {             logger.info(i + ":" + sqlList.get(i));         }           boolean isSuccess = false;         try {               // 执行SQL语句             int[] rows = SqlHelper.execute(getConn(dbFilePath), sqlList);             logger.info("Row count Expected:" + Arrays.toString(retRowsExpected));               // 执行结果集鉴定             isSuccess = Arrays.equals(rows, retRowsExpected);               // 调试打印执行结果集             if (null == rows || rows.length != retRowsExpected.length) {                 logger.error("返回结果与期望个数不符, rows.length=" + rows.length + ", retRowsExpected.length="                         + retRowsExpected.length);             } else {                 for (int index = 0; index < rows.length; index++) {                     logger.info("rows[" + index + "] return=" + rows[index] + ", expected=" + retRowsExpected[index]                             + ",sql=" + sqlList.get(index));                   }             }         } catch (Exception e) {             e.printStackTrace();         }           return isSuccess;     }       private static Connection getConn(String dbFile) {         String driver = "org.sqlite.JDBC"; // "com.mysql.jdbc.Driver";         String url = "jdbc:sqlite:" + dbFile; // "数据库连接";         //        String username = "账号";         //        String password = "密码";         Connection conn = null;         try {             Class.forName(driver); //classLoader,加载对应驱动             conn = (Connection) DriverManager.getConnection(url/*, username, password*/);         } catch (ClassNotFoundException e) {             e.printStackTrace();         } catch (SQLException e) {             e.printStackTrace();         }         return conn;     }       public static int[] execute(Connection conn, List<String> sqlList) throws Exception {         Statement stmt = null;         stmt = conn.createStatement();         for (String sql : sqlList) {             sql = sql.trim();             if (sql != null && !sql.trim().equals(""))                 stmt.addBatch(sql);         }         int[] rows = stmt.executeBatch();         logger.info("Row count returned:" + Arrays.toString(rows));         conn.close();           return rows;     }       /*      * getText方法吧path路径里面的文件按行读数来放入一个大的String里面去      * 并在换行的时候加入\r\n      */     public static String getText(String path, String SQLFileCharsetName) {         File file = new File(path);         if (!file.exists() || file.isDirectory()) {             logger.error(path + "文件不存在或存在同名文件夹");             return null;         }         StringBuilder sb = new StringBuilder();         try {             FileInputStream fis = new FileInputStream(path);             InputStreamReader isr = new InputStreamReader(fis, SQLFileCharsetName);             BufferedReader br = new BufferedReader(isr);             String temp = null;             temp = br.readLine();             while (temp != null) {                 if (temp.length() >= 2) {                     String str1 = temp.substring(0, 1);                     String str2 = temp.substring(0, 2);                     if (str1.equals("#") || str2.equals("--") || str2.equals("/*") || str2.equals("//")) {                         temp = br.readLine();                         continue;                     }                     sb.append(temp + "\r\n");                 }                   temp = br.readLine();             }             br.close();           } catch (Exception e) {             e.printStackTrace();         }         return sb.toString();     }       /*      * getSqlArray方法      * 从文件的sql字符串中分析出能够独立执行的sql语句并返回      */     public static List<String> getSql(String sql, String SQLFileCharsetName) {         String s = sql;           s = tryDeleteBOM(SQLFileCharsetName, s);           s = s.replaceAll("\r\n", "\r");         s = s.replaceAll("\r\n", "\r");         s = s.replaceAll("\r", "\n");         List<String> ret = new ArrayList<String>();         String[] sqlarry = s.split(";"); //用;把所有的语句都分开成一个个单独的句子         sqlarry = filter(sqlarry);         ret = Arrays.asList(sqlarry);         return ret;     }       public static String[] filter(String[] ss) {         List<String> strs = new ArrayList<String>();         for (String s : ss) {             if (s != null && !s.equals("")) {                 strs.add(s);             }         }         String[] result = new String[strs.size()];         for (int i = 0; i < strs.size(); i++) {             result[i] = strs.get(i).toString();           }         return result;     }       private static String tryDeleteBOM(String SQLFileCharsetName, String s) {         byte[] byteSQL = null;           logger.info("判断是否含有UTF-8的BOM头");           try {             byteSQL = s.getBytes(SQLFileCharsetName);               // 去掉UTF-8的BOM头             if (byteSQL[0] == (byte) 0xef && byteSQL[1] == (byte) 0xbb && byteSQL[2] == (byte) 0xbf) {                 logger.info("含有UTF-8的BOM头");                 logger.info("去掉UTF-8的BOM头前" + Arrays.toString(byteSQL));                   s = new String(byteSQL, 3, byteSQL.length - 3, SQLFileCharsetName);                   logger.info("去掉UTF-8的BOM头后为:" + Arrays.toString(s.getBytes(SQLFileCharsetName)));             } else {                 logger.info("不含有UTF-8的BOM头");             }         } catch (UnsupportedEncodingException ex) {             ex.printStackTrace();         }         return s;     }       public static void main(String[] args) {         String SQLPath = "config/xxx_create.utf8.sql";         String dbFile = "db" + File.separator + "test.db";         String SQLFileCharsetName = "UTF-8";         //                String SQLFileCharsetName = "GBK";         int[] retRowsExpected = { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 };           boolean isSuccess = createDBFromSQLFile(SQLPath, SQLFileCharsetName, dbFile, retRowsExpected);         logger.info("创建数据库" + (isSuccess ? "成功" : "失败"));     }   }