e241. handling a sql exception.txt

这里面包含了一百多个JAVA源文件

This example demonstrates how to retrieve the information in a SQLException. 
    try {
        // Execute SQL statements...
    } catch (SQLException e) {
        while (e != null) {
            // Retrieve a human-readable message identifying the reason for the exception
            String message = e.getMessage();
    
            // This vendor-independent string contains a code that identifies
            // the reason for the exception.
            // The code follows the Open Group SQL conventions.
            String sqlState = e.getSQLState();
    
            // Retrieve a vendor-specific code identifying the reason for the exception.
            int errorCode = e.getErrorCode();
    
            // If it is necessary to execute code based on this error code,
            // you should ensure that the expected driver is being
            // used before using the error code.
    
            // Get driver name
            String driverName = connection.getMetaData().getDriverName();
            if (driverName.equals("Oracle JDBC Driver") && errorCode == 123) {
                // Process error...
            }
    
            // The exception may have been chained; process the next chained exception
            e = e.getNextException();
        }
    }