分析Mysql大量数据导入遇到的问题以及解决方案

URL="jdbc:mysql://"+IP+":"+PORT+"/"+DB_NAME+"?useSSL=false&useUnicode=true&characterEncoding=utf-8";

Establishing SSL connection without server's identity verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements SSL connection must be established by default if explicit option isn't set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to 'false'. You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and provide truststore for server certificate verification.

[client]
default-character-set = utf8mb4
[mysqld]
character-set-server=utf8mb4
collation-server=utf8mb4_general_ci
[mysql]
default-character-set = utf8mb4

public static void insertSQL(String sql,List<TripleObject> tripleObjectList) throws SQLException{
    Connection conn=null;
    PreparedStatement psts=null;
    try {
      conn=DriverManager.getConnection(Common.URL, Common.DB_USERNAME, Common.DB_PASSWORD);
      conn.setAutoCommit(false); // 设置手动提交 
      // 保存sql后缀
      StringBuffer suffix = new StringBuffer();
      int count = 0; 
      psts=conn.prepareStatement("");
      String s="";
      String p="";
      String o="";
      while (count<tripleObjectList.size()) {
        s=tripleObjectList.get(count).getSubject().replaceAll(",", ".").replaceAll("\\(", "").replaceAll("\\)", "").replaceAll("\'", "").replaceAll("\\\\", "");
        p=tripleObjectList.get(count).getPredicate().replaceAll(",", ".").replaceAll("\\(", "").replaceAll("\\)", "").replaceAll("\'", "").replaceAll("\\\\", "");
        o=tripleObjectList.get(count).getObject().replaceAll(",", ".").replaceAll("\\(", "").replaceAll("\\)", "").replaceAll("\'", "").replaceAll("\\\\", "");
        suffix.append("('" +s +"','"+p+"','"+ o+"'),");
        count++;
      }
      // 构建完整SQL
      String allsql = sql + suffix.substring(0, suffix.length() - 1);
      // 添加执行SQL
      psts.addBatch(allsql);
      psts.executeBatch(); // 执行批量处理 
      conn.commit(); // 提交 
    } catch (Exception e) {
      e.printStackTrace();
    }finally{
      if(psts!=null){
        psts.close();
      }
      if(conn!=null){
        conn.close();
      }
    }
  }