JDBC数据库连接测试工具

• 贴代码

import java.io.PrintStream;
import java.sql.*;
import java.util.Properties;

public class ZJdbcPing {
    public static void main(String[] args) {
        PrintStream outs = System.out;
        // title.
        outs.println("zjdbcping <driverClassName> <url> <username> <password>");
        // oracle.jdbc.driver.OracleDriver "jdbc:oracle:thin:@192.168.3.33:1521:zjkf" crjapp crjapp
        outs.println();
        // args.
        String driverClassName="";
        String url="";
        String username="";
        String password="";
        if (args.length>0) driverClassName=args[0];
        if (args.length>1) url=args[1];
        if (args.length>2) username=args[2];
        if (args.length>3) password=args[3];
        // connect.
        Connection conn = null;
        try {
            Class.forName(driverClassName);
            conn = DriverManager.getConnection(url, username, password);
        }
        catch(Throwable ex) {
            ex.printStackTrace(outs);
        }
        if (null==conn) return;
        // info.
        try {
            outs.println(String.format("getCatalog:\t%s", conn.getCatalog()));
            outs.println("getClientInfo:");
            Properties properties = conn.getClientInfo();
            properties.list(outs);
            //outs.println("getTypeMap:");
            //Map<String,Class<?>> typeMap = conn.getTypeMap();
            //for(String key: typeMap.keySet()) {
            //  Class<?> c = typeMap.get(key);
            //  outs.println(String.format("\t%s:\t%s", key, c.toString()));
            //}
            outs.println("getMetaData:");
            DatabaseMetaData databaseMetaData = conn.getMetaData();
            printDatabaseMetaData(outs, databaseMetaData, "\t");
        }
        catch(Throwable ex) {
            ex.printStackTrace(outs);
        }
        finally {
            try {
                conn.close();
            }
            catch(Throwable ex) {
                ex.printStackTrace(outs);
            }
        }
        return;
    }

    private static void printDatabaseMetaData(PrintStream outs,
            DatabaseMetaData dbmd, String prefix) throws Exception {
        if (null==outs) return;
        if (null==dbmd) return;
        outs.println(prefix+String.format("getDatabaseMajorVersion:\t%d", dbmd.getDatabaseMajorVersion()));
        outs.println(prefix+String.format("getDatabaseMinorVersion:\t%d", dbmd.getDatabaseMinorVersion()));
        outs.println(prefix+String.format("getDatabaseProductName:\t%s", dbmd.getDatabaseProductName()));
        outs.println(prefix+String.format("getDatabaseProductVersion:\t%s", dbmd.getDatabaseProductVersion()));
        outs.println(prefix+String.format("getDefaultTransactionIsolation:\t%d", dbmd.getDefaultTransactionIsolation()));
        outs.println(prefix+String.format("getDriverMajorVersion:\t%d", dbmd.getDriverMajorVersion()));
        outs.println(prefix+String.format("getDriverMinorVersion:\t%d", dbmd.getDriverMinorVersion()));
        outs.println(prefix+String.format("getDriverName:\t%s", dbmd.getDriverName()));
        outs.println(prefix+String.format("getDriverVersion:\t%s", dbmd.getDriverVersion()));
        outs.println(prefix+String.format("getJDBCMajorVersion:\t%d", dbmd.getJDBCMajorVersion()));
        outs.println(prefix+String.format("getJDBCMinorVersion:\t%d", dbmd.getJDBCMinorVersion()));
        outs.println(prefix+String.format("getURL:\t%s", dbmd.getURL()));
        outs.println(prefix+String.format("getUserName:\t%s", dbmd.getUserName()));
        ResultSet rs = dbmd.getClientInfoProperties();
        outs.println(prefix+"getClientInfoProperties:");
        printResultSet(outs, rs, prefix+"\t");
        rs.close();
    }

    private static void printResultSet(PrintStream outs, ResultSet rs,
            String prefix) throws Exception {
        if (null==outs) return;
        if (null==rs) return;
        ResultSetMetaData rsmd = rs.getMetaData();
        int cols = rsmd.getColumnCount();
        outs.println(prefix+String.format("#getColumnCount:\t%d", cols));
        // col.
        if (true) {
            outs.print(prefix);
            for(int i=1; i<=cols; ++i) {
                if (i>1) outs.print('\t');
                String str = rsmd.getColumnName(i);
                outs.print(str);
            }
            outs.println();
        }
        // rows.
        int rows = 0;
        while(rs.next()) {
            ++rows;
            outs.print(prefix);
            for(int i=1; i<=cols; ++i) {
                if (i>1) outs.print('\t');
                Object o = null;
                String str = null;
                try {
                    o = rs.getObject(i);
                    if (null!=o)
                        str = o.toString();
                }
                catch(Exception ex) {
                    str = String.format("(%s)", ex.getMessage());
                }
                outs.print(str);
            }
            outs.println();
        }
        outs.println(prefix+String.format("#RowCount:\t%d", rows));
    }

}

• java打jar包

方法步骤

（1）用命令行进入到该目录下，编译这个文件

　　 javac ZJdbcPing.java

（2）将编译后的ZJdbcPing.class文件打成jar包

　　 jar -cvf ZJdbcPing.jar ZJdbcPing.class

　　c表示要创建一个新的jar包，v表示创建的过程中在控制台输出创建过程的一些信息，f表示给生成的jar包命名

（3） java -jar ZJdbcPing.jar  这时会报如下错误  ZJdbcPing.jar中没有主清单属性

　　添加Main-Class属性

　　用压缩软件打开ZJdbcPing.jar，会发现里面多了一个META-INF文件夹，里面有一个MENIFEST.MF的文件，用记事本打开

1 Manifest-Version: 1.0
2 Created-By: 1.8.0_121 (Oracle Corporation)
3 

　　在第三行的位置写入 Main-Class: ZJdbcPing（注意冒号后面有一个空格，整个文件最后有一行空行），保存

具体运行时，还注意得用java命令来运行，并指定加载驱动 jar. 例如——

java -Xbootclasspath/a:"ojdbc6-11.2.0.3.jar" -jar ZJdbcPing.jar oracle.jdbc.driver.OracleDriver "jdbc:oracle:thin:@10.10.10.245:1521:orcl" yjkj 123456
pause

　　运行结果