小编use*_*488的帖子

我写了以下java程序

import java.io.*;
import java.util.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.*;

public class Sample {
    public static void main (String[] args) throws IOException  {
                    int CountComputers;
            FileInputStream fstream = new FileInputStream(
                    "/export/hadoop-1.0.1/bin/countcomputers.txt");
            BufferedReader br = new BufferedReader(new InputStreamReader(fstream));
            String result=br.readLine();
            CountComputers=Integer.parseInt(result);
            input.close();
            fstream.close();
            Connection con = null;
            Statement st = null;
                ResultSet rs = null;    
               String url = "jdbc:postgresql://192.168.1.8:5432/NexentaSearch";
                String user = "postgres";
                String password = "valter89";
            ArrayList<String> paths = new ArrayList<String>(); …

我想测试从其他主机执行索引的功能,因为这个函数在hadoop程序中没有完全正确地实现.但是我遇到了从其他主机连接到数据库的问题,如下所述.我不明白什么问题.

我写了以下java程序

import java.io.*;
import java.util.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.logging.Level;
import java.util.*;

public class Sample {
    public static void main (String[] args) throws IOException  {
                    int CountComputers;
            FileInputStream fstream = new FileInputStream(
                    "/export/hadoop-1.0.1/bin/countcomputers.txt");
            BufferedReader br = new BufferedReader(new InputStreamReader(fstream));
            String result=br.readLine();
            CountComputers=Integer.parseInt(result);
            input.close();
            fstream.close();
            Connection con = null;
            Statement st = null;
                ResultSet rs = null;    
               String url = "jdbc:postgresql://192.168.1.8:5432/NexentaSearch";
                String user = "postgres";
                String password = "valter89";
            //Class.forName("org.postgresql.Driver");
            ArrayList<String> paths = …