如何启动JDBC Debug模式，打印JDBC诊断日志

jopen 10年前

1.下载Debug版本jar包</strong></span>

     首先要下载一个Debug版本的JDBC jar包，Debug版本的jar包命名形式为jdbcX_g.jar（如下图所示），如Oracle11g的Debug版本的jar包为jdbc6_g.jar。点击这里下载：http://www.oracle.com/technetwork/database/enterprise-edition/jdbc-112010-090769.html 

2.启动Logging模式
     第一种方式：设置运行环境变量java -Doracle.jdbc.Trace=true ...（elipse中run->run configurations->arguments一栏）
     第二种方式：在程序中控制（建议采用这种方式）
</div>
 
MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();                String loader = Thread.currentThread().getContextClassLoader().toString().replaceAll("[,=:\"]+", "");                ObjectName pattern = new ObjectName("com.oracle.jdbc:type=diagnosability,name=" + loader);                ObjectName diag = ((ObjectName[]) (mbs.queryNames(pattern, null).toArray(new ObjectName[0])))[0];                mbs.setAttribute(diag, new Attribute("LoggingEnabled", true));                System.out.println("LoggingEnabled = " + mbs.getAttribute(diag, "LoggingEnabled"));
</div>
     如果用的是Oracle 10g,直接执行：
    /**oracle 10g 启动方法*/                    oracle.jdbc.driver.OracleLog.setTrace(true); // enable logging                    oracle.jdbc.driver.OracleLog.setTrace(false); // disable logging
</div> </div>
3.配置log文件
jdbc使用的是java.util.logging包中的Logger对象打印log。
    /**配置log文件*/                Handler fh = new FileHandler("./oracle_jdbc_log.log");                fh.setLevel(Level.ALL);                fh.setFormatter(new SimpleFormatter());                Logger.getLogger("").addHandler(fh);                Logger.getLogger("").setLevel(Level.ALL);
</div> </div> 4.下面给大家一个完成的Demo</div>
 
    import javax.management.Attribute;        import javax.management.AttributeNotFoundException;        import javax.management.InstanceNotFoundException;        import javax.management.InvalidAttributeValueException;        import javax.management.MBeanException;        import javax.management.MBeanServer;        import javax.management.MalformedObjectNameException;        import javax.management.ObjectName;        import javax.management.ReflectionException;           public void run() throws SQLException {                DriverManager.registerDriver(new OracleDriver());                //需在加载OracleDriver之后开启log                enableOracleLogging();                Connection conn = null;                Statement stmt = null;                ResultSet rset = null;                try {                    conn = getConnection();                    System.out.println("Connection retrieved..");                    stmt = conn.createStatement();                    rset = stmt.executeQuery("select empno from emp");                    while (rset.next()) {                        System.out.println(rset.getInt(1));                    }                } catch (SQLException sqle) {                    sqle.printStackTrace();                } finally {                    if (rset != null) {                        rset.close();                    }                    if (stmt != null) {                        stmt.close();                    }                    if (conn != null) {                        conn.close();                    }                }            }        public static void enableOracleLogging() {                try {                    /** 配置log文件 */                    Handler fh = new FileHandler("./oracle_jdbc_log.log");                    fh.setLevel(Level.ALL);                    fh.setFormatter(new SimpleFormatter());                    Logger.getLogger("").addHandler(fh);                    Logger.getLogger("").setLevel(Level.ALL);                    /** oracle 11g 启动方法 */                    MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();                    String loader = Thread.currentThread().getContextClassLoader().toString().replaceAll("[,=:\"]+", "");                    ObjectName pattern = new ObjectName("com.oracle.jdbc:type=diagnosability,name=" + loader);                    ObjectName diag = ((ObjectName[]) (mbs.queryNames(pattern, null).toArray(new ObjectName[0])))[0];                    mbs.setAttribute(diag, new Attribute("LoggingEnabled", true));                    System.out.println("LoggingEnabled = " + mbs.getAttribute(diag, "LoggingEnabled"));                    /** oracle 10g 启动方法 */                    // oracle.jdbc.driver.OracleLog.setTrace(true); // enable logging                    // oracle.jdbc.driver.OracleLog.setTrace(false); // disable logging                        } catch (Exception e) {                    e.printStackTrace();                }            }
</div>
</div>

相关经验