preparedstatement.java

用java访问MySQL数据库的JDBC驱动程序。

    public void setLong(int parameterIndex, long x) throws java.sql.SQLException
    {
	set(parameterIndex, (new Long(x)).toString());
    }

    /**
     * Set a parameter to a Java float value.  The driver converts this
     * to a SQL FLOAT value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1...
     * @param x the parameter value
     * @exception java.sql.SQLException if a database access error occurs
     */
    public void setFloat(int parameterIndex, float x) throws java.sql.SQLException
    {
	set(parameterIndex, (new Float(x)).toString());
    }

    /**
     * Set a parameter to a Java double value.  The driver converts this
     * to a SQL DOUBLE value when it sends it to the database
     *
     * @param parameterIndex the first parameter is 1...
     * @param x the parameter value
     * @exception java.sql.SQLException if a database access error occurs
     */
    public void setDouble(int parameterIndex, double x) throws java.sql.SQLException
    {
	set(parameterIndex, _DoubleFormatter.format(x));
	// - Fix for large doubles by Steve Ferguson
    }

    /**
     * Set a parameter to a java.lang.BigDecimal value.  The driver
     * converts this to a SQL NUMERIC value when it sends it to the
     * database.
     *
     * @param parameterIndex the first parameter is 1...
     * @param x the parameter value
     * @exception java.sql.SQLException if a database access error occurs
     */
    public void setBigDecimal(int parameterIndex, BigDecimal X) throws java.sql.SQLException
    {
	if (X == null) {
	    setNull(parameterIndex, java.sql.Types.DECIMAL);
	}
	else {
	    set(parameterIndex, X.toString());
	}
    }

    /**
     * Set a parameter to a Java String value.  The driver converts this
     * to a SQL VARCHAR or LONGVARCHAR value (depending on the arguments
     * size relative to the driver's limits on VARCHARs) when it sends it
     * to the database.
     *
     * @param parameterIndex the first parameter is 1...
     * @param x the parameter value
     * @exception java.sql.SQLException if a database access error occurs
     */

    public void setString(int parameterIndex, String X) throws java.sql.SQLException
    {
	// if the passed string is null, then set this column to null
		
	if(X == null) {
	    set(parameterIndex, "null");
	}
	else {
	    StringBuffer B = new StringBuffer();
	    int i;
			        
	    B.append('\'');

	    for (i = 0 ; i < X.length() ; ++i) {
		char c = X.charAt(i);
				
		if (c == '\\' || c == '\'' || c == '"') {
		    B.append((char)'\\');
		}
		B.append(c);
	    }
			
	    B.append('\'');
	    set(parameterIndex, B.toString());
	}
    }

    /**
     * Set a parameter to a Java array of bytes.  The driver converts this
     * to a SQL VARBINARY or LONGVARBINARY (depending on the argument's
     * size relative to the driver's limits on VARBINARYs) when it sends
     * it to the database.
     *
     *
     * @param parameterIndex the first parameter is 1...
     * @param x the parameter value
     * @exception java.sql.SQLException if a database access error occurs
     */

    public void setBytes(int parameterIndex, byte x[]) throws java.sql.SQLException
    {
	if (x == null) {
	    setNull(parameterIndex, java.sql.Types.BINARY);
	}
	else {
	    ByteArrayInputStream BIn = new ByteArrayInputStream(x);
	    setBinaryStream(parameterIndex, BIn, x.length);
	}
    }

    /**
     * Set a parameter to a java.sql.Date value.  The driver converts this
     * to a SQL DATE value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1...
     * @param x the parameter value
     * @exception java.sql.SQLException if a database access error occurs
     */

    public void setDate(int parameterIndex, java.sql.Date X) throws java.sql.SQLException
    {
	if (X == null) {
	    setNull(parameterIndex, java.sql.Types.DATE);
	}
	else {
	    SimpleDateFormat DF = new SimpleDateFormat("''yyyy-MM-dd''");
	    
	    set(parameterIndex, DF.format(X));
	}
    }

    /**
     * Set a parameter to a java.sql.Time value.  The driver converts
     * this to a SQL TIME value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1...));
     * @param x the parameter value
     * @exception java.sql.SQLException if a database access error occurs
     */

    public void setTime(int parameterIndex, Time X) throws java.sql.SQLException
    {
	if (X == null) {
	    setNull(parameterIndex, java.sql.Types.TIME);
	}
	else {
	    set(parameterIndex, "'" + X.toString() + "'");
	}
    }

    /**
     * Set a parameter to a java.sql.Timestamp value.  The driver converts
     * this to a SQL TIMESTAMP value when it sends it to the database.
     *
     * @param parameterIndex the first parameter is 1...
     * @param x the parameter value
     * @exception java.sql.SQLException if a database access error occurs
     */

    public void setTimestamp(int parameterIndex, Timestamp X) throws java.sql.SQLException
    {
	if (X == null) {
	    setNull(parameterIndex, java.sql.Types.TIMESTAMP);
	}
	else {
	    EscapeProcessor EP = new EscapeProcessor();
	    String TimestampString = EP.escapeSQL("{ts '" + X.toString() + "'}");
	    set(parameterIndex, TimestampString);
	}
    }

    /**
     * When a very large ASCII value is input to a LONGVARCHAR parameter,
     * it may be more practical to send it via a java.io.InputStream.
     * JDBC will read the data from the stream as needed, until it reaches
     * end-of-file.  The JDBC driver will do any necessary conversion from
     * ASCII to the database char format.
     *
     * <P><B>Note:</B> This stream object can either be a standard Java
     * stream object or your own subclass that implements the standard
     * interface.
     *
     * @param parameterIndex the first parameter is 1...
     * @param x the parameter value
     * @param length the number of bytes in the stream
     * @exception java.sql.SQLException if a database access error occurs
     */

    public void setAsciiStream(int parameterIndex, InputStream X, int length) throws java.sql.SQLException
    {
	if (X == null) {
	    setNull(parameterIndex, java.sql.Types.VARCHAR);
	}
	else {
	    setBinaryStream(parameterIndex, X, length);
	}
    }

    /**
     * When a very large Unicode value is input to a LONGVARCHAR parameter,
     * it may be more practical to send it via a java.io.InputStream.
     * JDBC will read the data from the stream as needed, until it reaches
     * end-of-file.  The JDBC driver will do any necessary conversion from
     * UNICODE to the database char format.
     *
     * <P><B>Note:</B> This stream object can either be a standard Java
     * stream object or your own subclass that implements the standard
     * interface.
     *
     * @param parameterIndex the first parameter is 1...
     * @param x the parameter value
     * @exception java.sql.SQLException if a database access error occurs
     */

    public void setUnicodeStream(int parameterIndex, InputStream X, int length) throws java.sql.SQLException
    {
	if (X == null) {
	    setNull(parameterIndex, java.sql.Types.VARCHAR);
	}
	else {
	    setBinaryStream(parameterIndex, X, length);
	}
    }

    /**
     * When a very large binary value is input to a LONGVARBINARY parameter,
     * it may be more practical to send it via a java.io.InputStream.
     * JDBC will read the data from the stream as needed, until it reaches
     * end-of-file.  
     *
     * <P><B>Note:</B> This stream object can either be a standard Java
     * stream object or your own subclass that implements the standard
     * interface.
     *
     * @param parameterIndex the first parameter is 1...
     * @param x the parameter value
     * @exception java.sql.SQLException if a database access error occurs
     */

    public void setBinaryStream(int parameterIndex, InputStream X, int length) throws java.sql.SQLException
    {
	if (X == null) {
	    setNull(parameterIndex, java.sql.Types.BINARY);
	}
	else {
	    if (parameterIndex < 1 || 
		parameterIndex > _TemplateStrings.length) {
		throw new java.sql.SQLException("Parameter index out of range (" + parameterIndex + " > " + _TemplateStrings.length + ")", "S1009");
	    }
	    _ParameterStreams[parameterIndex - 1] = X;
	    _IsStream[parameterIndex - 1] = true;
	}
    }

    /**
     * In general, parameter values remain in force for repeated used of a
     * Statement.  Setting a parameter value automatically clears its
     * previous value.  However, in coms cases, it is useful to immediately
     * release the resources used by the current parameter values; this
     * can be done by calling clearParameters
     *
     * @exception java.sql.SQLException if a database access error occurs
     */

    public void clearParameters() throws java.sql.SQLException
    {
	for (int i = 0 ; i < _ParameterStrings.length ; i++) {
	    _ParameterStrings[i] = null;
	    _ParameterStreams[i] = null;
	    _IsStream[i] = false;
	}

    }

    /**
     * Set the value of a parameter using an object; use the java.lang
     * equivalent objects for integral values.
     *
     * <P>The given Java object will be converted to the targetSqlType before
     * being sent to the database.
     *
     * <P>note that this method may be used to pass database-specific
     * abstract data types.  This is done by using a Driver-specific
     * Java type and using a targetSqlType of java.sql.Types.OTHER
     *
     * @param parameterIndex the first parameter is 1...
     * @param x the object containing the input parameter value
     * @param targetSqlType The SQL type to be send to the database
     * @param scale For java.sql.Types.DECIMAL or java.sql.Types.NUMERIC
     *      types this is the number of digits after the decimal.  For 
     *      all other types this value will be ignored.
     * @exception java.sql.SQLException if a database access error occurs
     */

    public void setObject(int parameterIndex, Object X, int targetSqlType, int scale) throws java.sql.SQLException
    {
	if (X == null) {
	    setNull(parameterIndex, java.sql.Types.OTHER);
	}
	else try {
	    switch (targetSqlType)
		{
		case Types.TINYINT:
		case Types.SMALLINT:
		case Types.INTEGER:
		case Types.BIGINT:
		case Types.REAL:
		case Types.FLOAT:
		case Types.DOUBLE:
		case Types.DECIMAL:
		case Types.NUMERIC:
                    Number X_as_number;
		    if (X instanceof Boolean)
			X_as_number=((Boolean)X).booleanValue() ? new Integer(1) : new Integer(0);
		    else if (X instanceof String)
                        switch (targetSqlType) {
			case Types.TINYINT:
			case Types.SMALLINT:
			case Types.INTEGER:
			    X_as_number=Integer.valueOf((String)X);
			    break;
			case Types.BIGINT:
			    X_as_number=Long.valueOf((String)X);
			    break;
			case Types.REAL:
			    X_as_number=Float.valueOf((String)X);
			    break;
			case Types.FLOAT:
			case Types.DOUBLE:
			    X_as_number=Double.valueOf((String)X);
			    break;
			case Types.DECIMAL:
			case Types.NUMERIC:
			default:
			    X_as_number=new java.math.BigDecimal((String)X);
			}
		    else
			X_as_number=(Number)X;
                    switch (targetSqlType) {
		    case Types.TINYINT:
		    case Types.SMALLINT:
		    case Types.INTEGER:
			setInt(parameterIndex, X_as_number.intValue());
			break;
		    case Types.BIGINT:
			setLong(parameterIndex, X_as_number.longValue());
			break;
		    case Types.REAL:
			setFloat(parameterIndex, X_as_number.floatValue());
			break;
		    case Types.FLOAT:
		    case Types.DOUBLE:
			setDouble(parameterIndex, X_as_number.doubleValue());
			break;
		    case Types.DECIMAL:
		    case Types.NUMERIC:
		    default:
			if (X_as_number instanceof java.math.BigDecimal)
			    setBigDecimal(parameterIndex, (java.math.BigDecimal)X_as_number);
			else if (X_as_number instanceof java.math.BigInteger)
			    setBigDecimal(parameterIndex, new java.math.BigDecimal((java.math.BigInteger)X_as_number,scale));
			else
			    setBigDecimal(parameterIndex, new java.math.BigDecimal(X_as_number.doubleValue()));
			break;
		    }
		    break;
		case Types.CHAR:
		case Types.VARCHAR:
		case Types.LONGVARCHAR:
		    setString(parameterIndex, X.toString());
		    break;
		case Types.BINARY:
		case Types.VARBINARY:
		case Types.LONGVARBINARY:
		    if (X instanceof String)
			setBytes(parameterIndex, ((String)X).getBytes());
		    else
			setBytes(parameterIndex, (byte[])X);
		    break;
		case Types.DATE:
		case Types.TIMESTAMP:
                    java.util.Date X_as_date;
		    if (X instanceof String) {
                        ParsePosition pp=new ParsePosition(0);
			java.text.DateFormat sdf=new java.text.SimpleDateFormat(getDateTimePattern((String)X,false));
                        X_as_date=sdf.parse((String)X,pp);
		    } else
			X_as_date=(java.util.Date)X;
		    switch(targetSqlType) {
		    case Types.DATE:
			if (X_as_date instanceof java.sql.Date)
			    setDate(parameterIndex,(java.sql.Date)X_as_date);
			else
			    setDate(parameterIndex,new java.sql.Date(X_as_date.getTime()));
			break;
		    case Types.TIMESTAMP:
			if (X_as_date instanceof java.sql.Timestamp)
			    setTimestamp(parameterIndex,(java.sql.Timestamp)X_as_date);
			else
			    setTimestamp(parameterIndex,new java.sql.Timestamp(X_as_date.getTime()));
			break;
		    }
		    break;
		case Types.TIME:
		    if (X instanceof String) {
			java.text.DateFormat sdf=new java.text.SimpleDateFormat(getDateTimePattern((String)X,true));
			setTime(parameterIndex,new java.sql.Time(sdf.parse((String)X).getTime()));
		    } else
			setTime(parameterIndex,(java.sql.Time)X);
		    break;
		case Types.OTHER:
		    try {
			ByteArrayOutputStream BytesOut = new ByteArrayOutputStream();
			ObjectOutputStream ObjectOut = new ObjectOutputStream(BytesOut);
			ObjectOut.writeObject(X);
			ObjectOut.flush();
			ObjectOut.close();
			BytesOut.flush();
			BytesOut.close();
      
			byte[] buf = BytesOut.toByteArray();
			ByteArrayInputStream BytesIn = new ByteArrayInputStream(buf);
			setBinaryStream(parameterIndex, BytesIn, -1);
		    }
		    catch (Exception E) {
			throw new java.sql.SQLException("Invalid argument value: " + E.getClass().getName(), "S1009");
		    }
		    break;
		default:
		    throw new java.sql.SQLException("Unknown Types value", "S1000");
		}
        } catch (Exception ex) {
	    if (ex instanceof java.sql.SQLException) throw (java.sql.SQLException)ex;
	    else throw new java.sql.SQLException("Cannot convert "+X.getClass().toString()+" to SQL type requested", "S1000");
	}