jdbc测试报错

jdbc测试报错：

java.lang.NoClassDefFoundError: Could not initialize class com.purplesky.jdbc.utils.JDBCUtils
工具类

public class JDBCUtils {
    //定义属性
    private static String user;
    private static String password;
    private static String url;
    private static String driver;
    //在静态代码块初始化
    static {
        try {
            Properties properties = new Properties();
            properties.load(new FileInputStream("src:\mysql.properties"));
            user = properties.getProperty("user");
            password = properties.getProperty("password");
            url = properties.getProperty("url");
            driver = properties.getProperty("driver");
            Class.forName(driver);

        } catch (Exception e) {
            //开发中，可以这样
            //1.将编译异常转成运行异常
            //2.调用者，可以选择捕获异常，也可以选择默认处理该异常，比较方便
            throw new RuntimeException(e);
        }
    }

    //连接数据库
    public static Connection getConnection() {
        try {
            return DriverManager.getConnection(url,user,password);
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }

    //关闭
    public static void close(ResultSet set, Statement statement,Connection connection) {
        try {
            if (set != null) {
                set.close();
            }
            if (statement != null) {
                statement.close();
            }
            if (connection != null) {
                connection.close();
            }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }

测试类

 @Test
    public void testDML() {
        Connection connection = null;
        PreparedStatement preparedStatement = null;
        String sql = "update actor set name = ? where id =?";

        try {
            connection = JDBCUtils.getConnection();
            preparedStatement = connection.prepareStatement(sql);
            preparedStatement.setString(1, "周星驰");
            preparedStatement.setInt(2, 2);
            preparedStatement.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            JDBCUtils.close(null, preparedStatement, connection);
        }
    }

问题描述

例如：数据传输过程中数据不时出现丢失的情况，偶尔会丢失一部分数据
APP 中接收数据代码：

@Override
	public void run() {
		bytes = mmInStream.read(buffer);
		mHandler.obtainMessage(READ_DATA, bytes, -1, buffer).sendToTarget();
	}

---

原因分析：

1. 先跑了下sql发现正常运行
2. 然后检查了配置文件
   
   检查了配置文件的确在src下，使用的也是绝对路径
   仔细一看路径多了个 :
   properties.load(new FileInputStream("src:\mysql.properties"));
   去掉后即可正常运行