jdbc

Posted 2020-08-14

package controllers.CarSecurityCheckPlugin.util;

import java.io.FileInputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

public final class ConnUtils {

    private static String driverName;
    private static String dbURL;
    private static String userName;
    private static String userPwd;

    private ConnUtils() {
        
    }

    static {
        // driverName="com.microsoft.sqlserver.jdbc.SQLServerDriver";
        // dbURL="jdbc:sqlserver://192.168.20.245:1433;DatabaseName=anjianduijie";
        // userName="sa";
        // userPwd="123";
        Properties pro = new Properties();
        try {
            pro.load(new FileInputStream("modules/CarSecurityCheckPlugin/conf/jdbc.properties"));
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        driverName = pro.getProperty("jdbc.driverName");
        dbURL = pro.getProperty("jdbc.dbURL");
        userName = pro.getProperty("jdbc.userName");
        userPwd = pro.getProperty("jdbc.userPwd");
        try {
            Class.forName(driverName);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }

    public static Connection getConnection() {
        try {
            Connection dbConn = DriverManager.getConnection(dbURL, userName, userPwd);
            return dbConn;
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 释放资源
     * 
     * @param rs
     * @param st
     * @param conn
     */
    public static void free(ResultSet rs, Statement st, Connection conn) {
        try {
            if (rs != null)
                rs.close();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                if (st != null)
                    st.close();
            } catch (SQLException e) {
                e.printStackTrace();
            } finally {
                if (conn != null)
                    try {
                        conn.close();
                    } catch (SQLException e) {
                        e.printStackTrace();
                    }
            }
        }
    }

}

jdbc.properties文件里面写

jdbc.driverName=com.microsoft.sqlserver.jdbc.SQLServerDriver这些配置。