将您的数据库属性保存在类文件DBPropery.java
中。
final class DBProperty
{
static String[] urls = {
"C",
"R",
"V"
}; //You can add more URLs here.
static String[] driver= {
"Driver1",
"Driver2",
"Driver3"
};//You can add more drivers string
static String[] table = {
"Table1",
"Table2",
"Table3"
};//You can add more table names here According to URLs mentioned in urls array.
static String[] user = {
"A",
"P",
"T"
};//You can add more user names here according to URls mentioned in urls array.
static String[] pwd = {
"B",
"Q",
"U"
};//You can add more Password here according to URls mentioned in urls array.
static String[] queries = {
"Query for Table1",
"Query for Table2",
"Query for Table3",
};//You can add more queries here for more tables according to URls mentioned in urls array.
static int[] columns ={
2,
2,
2
};//You can change the column numbers according to need . 0th index belongs to Table1 , 1 to table2....so on.
//If you add more tables , add corresponding columns count to next index.
static String[] columnValues ={
"1^John",
"34^Vicky",
"65^Ethen"
};//String at each index represents a row in corresponding table in table[] array. each column is seperated by delimiter "^".
}
DBProperty.java
在文件中进行所有更改。
然后继续下面的类文件
import java.sql.*;
import java.util.*;
class MultiTableInsert implements Runnable
{
Map<String,Integer> columnsInTable;
Map<String,String> tableDriver;
Map<String,String> rowForTable;
Map<String,String> queryForTable;
Map<String,String> urlForTable;
Map<String,String> userForTable;
Map<String,String> pwdForTable;
String[] tables ;
public MultiTableInsert(String... tables)//Loading all Database Settings here..
{
this.tables = tables;
columnsInTable = new LinkedHashMap<String,Integer>();
rowForTable = new LinkedHashMap<String,String>();
tableDriver = new LinkedHashMap<String,String>();
urlForTable = new LinkedHashMap<String,String>();
userForTable= new LinkedHashMap<String,String>();
pwdForTable = new LinkedHashMap<String,String>();
for (int i = 0 ; i < DBProperty.urls.length ; i++ )
{
try
{
tableDriver.put(DBProperty.table[i],DBProperty.driver[i]);
queryForTable.put(DBProperty.table[i],DBProperty.queries[i]);
columnsInTable.put(DBProperty.table[i],DBProperty.columns[i]);
rowForTable.put(DBProperty.table[i],DBProperty.columnValues[i]);
urlForTable.put(DBProperty.table[i],DBProperty.urls[i]);
userForTable.put(DBProperty.table[i],DBProperty.user[i]);
pwdForTable.put(DBProperty.table[i],DBProperty.pwd[i]);
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
}
@Override
public void run()
{
insertIntoTable(tables);
}
private void insertIntoTable(String... tables)
{
for (String tble : tables )
{
Connection con = null;
PreparedStatement pStmt = null;
try
{
Class.forName(tableDriver.get(tble));
con = DriverManager.getConnection(urlForTable.get(tble),userForTable.get(tble),pwdForTable.get(tble));
pStmt = con.prepareStatement(queryForTable.get(tble));
int columns = columnsInTable.get(tble);
String sRow = rowForTable.get(tble);
StringTokenizer tokenizer = new StringTokenizer(sRow,"^");
for (int i = 0; i < columns ; i++)
{
pStmt.setString(i+1,(String)tokenizer.nextElement());
}
pStmt.execute();
}
catch (Exception ex)
{
ex.printStackTrace();
}
finally
{
try
{
con.close();
}catch (Exception ex){}
try
{
pStmt.close();
}catch (Exception ex){}
}
}
}
public static void main(String[] args)
{
int length = args.length;
int THREAD_COUNTS = 10;//Number of threads you want to start.
switch (length)
{
case 0:
System.out.println("Usage: javac MultiTableInsert Table1/Table2/Table3 <Table1/Table2/Table3> <Table1/Table2/Table3>");
System.exit(0);
case 1:
for (int i = 0 ; i < THREAD_COUNTS ; i++)
{
MultiTableInsert mti = new MultiTableInsert(args[0]);
Thread th = new Thread(mti,"Thread"+i);//Create New Thread
th.start(); //Start Thread
}
break;
case 2:
for (int i = 0 ; i < THREAD_COUNTS ; i++)
{
MultiTableInsert mti = new MultiTableInsert(args[0],args[1]);//Create New Thread
Thread th = new Thread(mti,"Thread"+i); //Start Thread
th.start();
}
break;
default:
for (int i = 0 ; i < THREAD_COUNTS ; i++)
{
MultiTableInsert mti = new MultiTableInsert(args[0],args[1],args[2]);//Create New Thread
Thread th = new Thread(mti,"Thread"+i); //Start Thread
th.start();
}
break;
}
}
}