java insert方法_【Oracle/Java】以Insert ALL方式向表中插入百万条记录，耗时9分17秒...
packagecom.hy;importjava.sql.Connection;importjava.sql.DriverManager;importjava.sql.ResultSet;importjava.sql.SQLException;importjava.sql.Statement;importjava.text.MessageFormat;/*** 百萬數據插入Oracle表中
*@authorhorn1
**/
public classMillionInserter {//連接到數據庫的四大屬性
private static final String DRIVER = "oracle.jdbc.driver.OracleDriver";private static final String DBURL = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";private static final String USER = "system";private static final String PSWD = "XXXX";public void batchInsert(intcount) {
Connection conn= null;
Statement stmt= null;try{long startTime =System.currentTimeMillis();
Class.forName(DRIVER).newInstance();
conn=DriverManager.getConnection(DBURL, USER, PSWD);
stmt=conn.createStatement();int BatchSize=100;int index=0;int times=count/BatchSize;for(int i=0;i
StringBuilder sb=newStringBuilder();
sb.append("INSERT ALL ");for(int j=0;j
index=i*BatchSize+j;
String name="M"+index;int age=j % 100;
String raw=" INTO firsttb(NAME, age,createdtime) values(''{0}'',''{1}'',sysdate) ";
Object[] arr={name,age};
String particialSql=MessageFormat.format(raw, arr);
sb.append(particialSql);
}
sb.append("select * from dual");
String sql=sb.toString();
stmt.executeUpdate(sql);
System.out.println("#"+i+" "+BatchSize+" records inserted");
}long endTime =System.currentTimeMillis();
System.out.println("Time elapsed:" + sec2DHMS((endTime - startTime)/1000) );
String sql= "select count(*) as cnt from firsttb";
ResultSet rs=stmt.executeQuery(sql);while(rs.next()) {
String cnt= rs.getString("cnt");
System.out.println("當前記錄數："+cnt);
}
}catch(Exception e) {
System.out.print(e.getMessage());
}finally{try{
stmt.close();
conn.close();
}catch(SQLException e) {
System.out.print("Can't close stmt/conn because of " +e.getMessage());
}
}
}/*** 將秒轉化為日時分秒
*@paramsecondCount
*@return
*/
private static String sec2DHMS(longsecondCount) {
String retval= null;long days = secondCount / (60 * 60 * 24);long hours = (secondCount % (60 * 60 * 24)) / (60 * 60);long minutes = (secondCount % (60 * 60)) / 60;long seconds = secondCount % 60;
String strSeconds="";if(seconds!=0) {
strSeconds=seconds + "s";
}if (days > 0) {
retval= days + "d" + hours + "h" + minutes + "m" +strSeconds;
}else if (hours > 0) {
retval= hours + "h" + minutes + "m" +strSeconds;
}else if (minutes > 0) {
retval= minutes + "m" +strSeconds;
}else{
retval=strSeconds;
}returnretval;
}/*** 執行點
*@paramargs*/
public static voidmain(String[] args) {
MillionInserter mi=newMillionInserter();
mi.batchInsert(1000000);
}
}
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