Java jdbc批量多线程读取CVS文件入库

import java.util.ArrayList;
/**
 * @param
 * @author wu.lin
 * @description 程序入口，启用线程读取文件并入库
 * @create 2016年09月01日 15:12
 * @throws
 */
public class MemSqlTestMain {

  public static void main(String[] args) {

    //通过读取配置文件读取要插入数据的表名
    String tableName = XMLUtil.getTableName();
    System.out.println(tableName);

    //通过配置文件读取数据存放的文件的路径
    ArrayList<String> fileNameList = XMLUtil.getFileNameList();
    int len = fileNameList.size();

    //针对每一个文件开启一个进程去执行读取并入库的操作
    for (int i = 0; i < len; i++) {

      String fileName = fileNameList.get(i);
      System.out.println(fileName);

      new Thread(new InsertUtil(fileName, tableName)).start();
    }

  }
}

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.sql.*;

/**
 * @param
 * @author wu.lin
 * @description InsertUtil是一个线程类，主要读取数据文件组装Sql并执行入库操作
 * @create 2016年09月01日 14:10
 * @throws 
 */
public class InsertUtil implements Runnable {

  //文件路径
  private String filePath;

  //表名
  private String tableName;

  //.cvs文件数据以","分隔
  private static String DELIMITERS = ",";

  //获取数据库帮助类
  DBUtil dbutil = DBUtil.getInstance();

  public InsertUtil() {}

  public InsertUtil(String filePath, String tableName) {
    this.filePath = filePath;
    this.tableName = tableName;
  }

  public static String getDELIMITERS() {
    return DELIMITERS;
  }

  public static void setDELIMITERS(String delimiters) {
    DELIMITERS = delimiters;
  }

  public String getFilePath() {
    return filePath;
  }

  public void setFilePath(String filePath) {
    this.filePath = filePath;
  }


  //读取文件并且批处理入库的方法
  public boolean insertDB(String tablename, long rc, String filePath) {

    if(filePath == null || "".equals(filePath)) {
      System.out.println("文件路径为空");
      return false;
    }
    if (rc < 1) {
      rc = 100;
    }

    Connection conn = null;
    boolean flag = false;
    Statement pre = null;

    String sql = "";

    TableDataInfo tableInfo = new TableDataInfo();

    try {

      if(conn == null) {
        conn = dbutil.getConnection();
      }

      pre = conn.createStatement();

      conn.setAutoCommit(false);

      int colCount = tableInfo.getTableColNums(tablename, conn);

      int rowCount = 0;

      File file = new File(filePath);

      BufferedReader buf = null;
      buf = new BufferedReader(new InputStreamReader(new FileInputStream(file)));

      String line_record = buf.readLine();

      long startTime = System.currentTimeMillis(); //开始计时

      while (line_record != null) {
        // 解析每一条记录
        sql = "INSERT INTO " + tablename + " VALUES('";

        String[] fields = line_record.split(DELIMITERS);

        //对Insert语句的合法性进行判断

        if(fields.length != colCount){
          System.out.println("要插入的数据列数和表的数据列不相匹配，停止执行");
          break;
        }


        for (int i = 0; i < fields.length; i++) {

          sql += fields[i];
          if (i < fields.length - 1) {
            sql += "','";
          }
        }

        sql += "');";

        // 在控制台输出SQL语句
        // System.out.println(sql);

        //执行SQL语句
        pre.addBatch(sql);


        rowCount++;
        line_record = buf.readLine();

        if (rowCount >= rc) {
          break;
        }

      }
      pre.executeBatch();
      conn.setAutoCommit(true);

      pre.close();


      System.out.println("共写入行数：" + rowCount);

      long endTime = System.currentTimeMillis(); //停止计时

      System.out.println("执行时间为:" + (endTime - startTime) + " ms");

    } catch (Exception e) {

      flag = false;
      try {
        //回滚
        if(conn != null) {
          conn.rollback();
        }
      } catch (SQLException e1) {
        e1.printStackTrace();
      }
      e.printStackTrace();
    } finally {
      dbutil.close(null, pre, conn);
    }
    return flag;
  }

  public void run() {
    this.insertDB(tableName, 500000, filePath);
  }

}

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.ResultSet;
import java.sql.SQLException;

/**
 * @param
 * @author wu.lin
 * @description 数据库表实体
 * @create 2016年09月01日 14:19
 * @throws
 */
public class TableDataInfo {

  DBUtil dbutil = DBUtil.getInstance();

  /**
   *
   * @param m_TableName
   * @param m_Connection
   * @return 该表的列数
   */
  public int getTableColNums(String m_TableName, Connection m_Connection) {

    int colCount = 0;

    try {
      if (m_Connection == null) {

        m_Connection = dbutil.getConnection();
      }

      DatabaseMetaData m_DBMetaData = m_Connection.getMetaData();

      ResultSet tableRet = m_DBMetaData.getTables(null, "%", m_TableName,
          new String[] { "TABLE" });

      while (tableRet.next()) {
        System.out.println("Table name is:"
            + tableRet.getString("TABLE_NAME"));
      }

      String columnName;
      String columnType;
      ResultSet colRet = m_DBMetaData.getColumns(null, "%", m_TableName,"%");

      while (colRet.next()) {

        columnName = colRet.getString("COLUMN_NAME");
        columnType = colRet.getString("TYPE_NAME");
        int dataSize = colRet.getInt("COLUMN_SIZE");
        int digits = colRet.getInt("DECIMAL_DIGITS");
        int nullable = colRet.getInt("NULLABLE");

        String nullFlag;

        if (nullable == 1) {
          nullFlag = "Null";
        } else {
          nullFlag = "Not Null";
        }

        System.out.println(columnName + " " + columnType + "("
            + dataSize + "," + digits + ") " + nullFlag);
        colCount++;
      }

    } catch (SQLException e) {
      e.printStackTrace();
    }

    System.out.println("The number of column is: " + colCount);
    return colCount;
  }
}

<?xml version="1.0" encoding="utf-8" ?>
<config>
  <db_file>src/dbconfig.properties</db_file>
  <tableName>memtest</tableName>
  <files>
    <filePath>files/memtest.csv</filePath>
    <filePath>files/memtest_1.csv</filePath>
    <filePath>files/memtest_2.csv</filePath>
    <filePath>files/memtest_3.csv</filePath>
    <filePath>files/memtest_4.csv</filePath>
    <filePath>files/memtest_5.csv</filePath>
    <filePath>files/memtest_6.csv</filePath>
    <filePath>files/memtest_7.csv</filePath>
    <filePath>files/memtest_8.csv</filePath>
    <filePath>files/memtest_9.csv</filePath>
    <filePath>files/memtest_10.csv</filePath>
  </files>
</config>

import javax.xml.parsers.*;
import org.w3c.dom.*;
import java.io.*;
import java.util.ArrayList;

/**
 * @param
 * @author wu.lin
 * @description 读取配置信息
 * @create 2016年09月01日 15:45
 * @throws
 */
public class XMLUtil {

  //该方法用于从XML配置文件中提取要插入的表名称，并返回该表名称
  public static String getTableName() {

    return getXmlProperties("tableName");
  }

  public static String getDatabaseUrl() {
    return getXmlProperties("dataBaseUrl");
  }

  public static String getDbFilePath() {
    return getXmlProperties("db_file");
  }

  private static String getXmlProperties(String proName) {
    try {

      Document doc = getDoc();

      //获取包含品牌名称的文本节点
      NodeList nl = doc.getElementsByTagName(proName);
      Node classNode=nl.item(0).getFirstChild();
      String tableName=classNode.getNodeValue().trim();

      return tableName;
    } catch(Exception e)
    {
      e.printStackTrace();
      return null;
    }
  }

  private static Document getDoc() throws Exception {
    //创建文档对象
    DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = dFactory.newDocumentBuilder();
    Document doc;
    doc = builder.parse(new File("src/config.xml"));

    return doc;
  }
}

db.used=mysql

# driver class
oracle.jdbc.driver_class=oracle.jdbc.driver.OracleDriver
# URL
oracle.jdbc.url=jdbc:oracle:thin:@localhost:1521:ORCL
# username
oracle.jdbc.username=scott
# pwd
oracle.jdbc.pwd=tiger


#mysql connect config
mysql.jdbc.driver_class=com.mysql.jdbc.Driver
mysql.jdbc.url=jdbc:mysql://localhost:3306/mysqldb
mysql.jdbc.username=root
mysql.jdbc.pwd=

import java.io.FileInputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

/**
 * @param
 * @author wu.lin
 * @description 数据库帮助类
 * @create 2016年09月01日 18:56
 * @throws
 */

public class DBUtil {

  private static Properties env = new Properties();

  private static DBUtil dbutil;

  private static String dbname;

  private static String driverClass_key;

  private static String url_key;

  private static String username_key;

  private static String pwd_key;


  private DBUtil(){}

  // 单例模式
  public static synchronized DBUtil getInstance() {
    if (null == dbutil) {
      dbutil = new DBUtil();
    }
    return dbutil;
  }

  /**
   * 得到数据库连接
   * @return
   */
  public Connection getConnection() {
    Connection conn = null;

    try {
      env.load(new FileInputStream(XMLUtil.getDbFilePath()));

      dbname = env.getProperty("db.used").toLowerCase();

      driverClass_key = dbname + ".jdbc.driver_class";
      url_key = dbname + ".jdbc.url";
      username_key = dbname + ".jdbc.username";
      pwd_key = dbname + ".jdbc.pwd";

      //加载连接数据库的驱动程序类文件
      Class.forName(env.getProperty(driverClass_key));
      conn = createConnection();

    } catch (Exception e) {

      e.printStackTrace();
    }

    return conn;
  }

  private Connection createConnection() throws SQLException {

    Connection conn = null;
    if ("oracle".equals(dbname)) {

      conn = DriverManager.getConnection(env.getProperty(url_key), env.getProperty(username_key),
          env.getProperty(pwd_key));
    }

    if ("sqlserver".equals(dbname)) {

      conn = DriverManager.getConnection(env.getProperty(url_key), env.getProperty(username_key),
          env.getProperty(pwd_key));

    }

    if ("mysql".equals(dbname)) {
      // 其他数据库的连接语法
      String url = env.getProperty(url_key);
      String username = env.getProperty(username_key);
      String pwd = env.getProperty(pwd_key);

      if(username != null && !"".equals(username)) {
        url += ("?user=" + username);
        if(pwd != null && !"".equals(pwd)) {
          url += ("&password=" + pwd);
        }
      }

      conn = DriverManager.getConnection(url);
    }

    return conn;

  }

  //提供jdbc关闭连接的方法
  public void close(ResultSet rs,Statement st,Connection conn){

    try {
      if(rs!=null)
        rs.close();
      if(st!=null)
        st.close();
      if(conn!=null)
        conn.close();
    } catch (SQLException e) {

      e.printStackTrace();
    }
  }
}