databasetool.java

nutch的小应用

package chapter11;

import java.sql.*;

public class DataBaseTool {
	private String strDriver;
	private String coonnstring;
	private Connection conn;
	private Statement state;
	
	public static void main(String[] args) {
		DataBaseTool tool = new DataBaseTool("WordList");
		tool.closeDataBaseTool ();
	}
	
	public DataBaseTool(String strconnect) {
		strDriver = "com.microsoft.jdbc.sqlserver.SQLServerDriver";  
		coonnstring = "jdbc:microsoft:sqlserver://localhost:1433;DatabaseName="
				+ strconnect;
		String user = "sa";
		String password = "sa";
		try {
			Class.forName(strDriver).newInstance();//
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (Exception e) {
			e.printStackTrace();
		} 
		try {
			conn = DriverManager.getConnection(coonnstring, user, password);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		try {
			state = conn.createStatement();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}
	public ResultSet search(String sql){
		ResultSet rs=null;
		try {
			rs=state.executeQuery(sql);
		} catch (SQLException e) {
			e.printStackTrace();
		}
		return rs;
	}
	public ResultSet searchByColumn(String table,String name, String value) {
		ResultSet rs=null;
		String sql="select * from " + table + " where ("+ name +" like '%"+value+"%')";
		System.out.println(sql);
		try {
			rs = state.executeQuery(sql);
		} catch (SQLException e) {
			e.printStackTrace();
			}
		return rs;
	}
	public boolean insert(String sql){
		try {
			state.execute(sql);
		} catch (SQLException e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}
	public boolean update(String sql){
		try {
			state.executeUpdate(sql);
		} catch (SQLException e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}
	public boolean closeDataBaseTool () {
		try {
			state.close();
			conn.close();
		} catch (SQLException e) {
			e.printStackTrace();
			return false;
		}
		return true;
	}
}