bodycontentimpl.java

低版本的tomcat 对于有些老版本的应用还真的需要老版的中间件

     * @throws	   java.io.IOException
     */

    public void print(double d) throws IOException {
	write(String.valueOf(d));
    }

    /**
     * Print an array of characters.  The characters are converted into bytes
     * according to the platform's default character encoding, and these bytes
     * are written in exactly the manner of the <code>{@link #write(int)}</code>
     * method.
     *
     * @param      s   The array of chars to be printed
     *
     * @throws  NullPointerException  If <code>s</code> is <code>null</code>
     * @throws	   java.io.IOException
     */

    public void print(char s[]) throws IOException {
	write(s);
    }

    /**
     * Print a string.  If the argument is <code>null</code> then the string
     * <code>"null"</code> is printed.  Otherwise, the string's characters are
     * converted into bytes according to the platform's default character
     * encoding, and these bytes are written in exactly the manner of the
     * <code>{@link #write(int)}</code> method.
     *
     * @param      s   The <code>String</code> to be printed
     * @throws	   java.io.IOException
     */

    public void print(String s) throws IOException {
	if (s == null) {
	    s = "null";
	}
	write(s);
    }

    /**
     * Print an object.  The string produced by the <code>{@link
     * java.lang.String#valueOf(Object)}</code> method is translated into bytes
     * according to the platform's default character encoding, and these bytes
     * are written in exactly the manner of the <code>{@link #write(int)}</code>
     * method.
     *
     * @param      obj   The <code>Object</code> to be printed
     * @see        java.lang.Object#toString()
     * @throws	   java.io.IOException
     */

    public void print(Object obj) throws IOException {
	write(String.valueOf(obj));
    }

    /**
     * Terminate the current line by writing the line separator string.  The
     * line separator string is defined by the system property
     * <code>line.separator</code>, and is not necessarily a single newline
     * character (<code>'\n'</code>).
     * @throws	   java.io.IOException
     */

    public void println() throws IOException {
	newLine();
    }

    /**
     * Print a boolean value and then terminate the line.  This method behaves
     * as though it invokes <code>{@link #print(boolean)}</code> and then
     * <code>{@link #println()}</code>.
     * @throws	   java.io.IOException
     */

    public void println(boolean x) throws IOException {
	synchronized (lock) {
	    print(x);
	    println();
	}
    }

    /**
     * Print a character and then terminate the line.  This method behaves as
     * though it invokes <code>{@link #print(char)}</code> and then <code>{@link
     * #println()}</code>.
     * @throws	   java.io.IOException
     */

    public void println(char x) throws IOException {
	synchronized (lock) {
	    print(x);
	    println();
	}
    }

    /**
     * Print an integer and then terminate the line.  This method behaves as
     * though it invokes <code>{@link #print(int)}</code> and then <code>{@link
     * #println()}</code>.
     * @throws	   java.io.IOException
     */

    public void println(int x) throws IOException {
	synchronized (lock) {
	    print(x);
	    println();
	}
    }

    /**
     * Print a long integer and then terminate the line.  This method behaves
     * as though it invokes <code>{@link #print(long)}</code> and then
     * <code>{@link #println()}</code>.
     * @throws	   java.io.IOException
     */

    public void println(long x) throws IOException {
	synchronized (lock) {
	    print(x);
	    println();
	}
    }

    /**
     * Print a floating-point number and then terminate the line.  This method
     * behaves as though it invokes <code>{@link #print(float)}</code> and then
     * <code>{@link #println()}</code>.
     * @throws	   java.io.IOException
     */

    public void println(float x) throws IOException {
	synchronized (lock) {
	    print(x);
	    println();
	}
    }

    /**
     * Print a double-precision floating-point number and then terminate the
     * line.  This method behaves as though it invokes <code>{@link
     * #print(double)}</code> and then <code>{@link #println()}</code>.
     * @throws	   java.io.IOException
     */

    public void println(double x) throws IOException{
	synchronized (lock) {
	    print(x);
	    println();
	}
    }

    /**
     * Print an array of characters and then terminate the line.  This method
     * behaves as though it invokes <code>{@link #print(char[])}</code> and then
     * <code>{@link #println()}</code>.
     * @throws	   java.io.IOException
     */

    public void println(char x[]) throws IOException {
	synchronized (lock) {
	    print(x);
	    println();
	}
    }

    /**
     * Print a String and then terminate the line.  This method behaves as
     * though it invokes <code>{@link #print(String)}</code> and then
     * <code>{@link #println()}</code>.
     * @throws	   java.io.IOException
     */

    public void println(String x) throws IOException {
	synchronized (lock) {
	    print(x);
	    println();
	}
    }

    /**
     * Print an Object and then terminate the line.  This method behaves as
     * though it invokes <code>{@link #print(Object)}</code> and then
     * <code>{@link #println()}</code>.
     * @throws	   java.io.IOException
     */

    public void println(Object x) throws IOException {
	synchronized (lock) {
	    print(x);
	    println();
	}
    }

    /**
     * Clear the contents of the buffer. If the buffer has been already
     * been flushed then the clear operation shall throw an IOException
     * to signal the fact that some data has already been irrevocably 
     * written to the client response stream.
     *
     * @throws IOException		If an I/O error occurs
     */

    public void clear() throws IOException {
        synchronized (lock) {
	    nextChar = 0;
	}
    }

    /**
     * Clears the current contents of the buffer. Unlike clear(), this
     * mehtod will not throw an IOException if the buffer has already been
     * flushed. It merely clears the current content of the buffer and
     * returns.
     *
     * @throws IOException		If an I/O error occurs
     */

    public void clearBuffer() throws IOException {
        this.clear();
    }

    /**
     * Close the stream, flushing it first.  Once a stream has been closed,
     * further write() or flush() invocations will cause an IOException to be
     * thrown.  Closing a previously-closed stream, however, has no effect.
     *
     * @exception  IOException  If an I/O error occurs
     */

    public void close() throws IOException {
        synchronized (lock) {
	    cb = null;	
	}
    }

    /**
     * @return the number of bytes unused in the buffer
     */

    public int getRemaining() {
        return bufferSize - nextChar;
    }

    /**
     * Return the value of this BodyJspWriter as a Reader.
     * Note: this is after evaluation!!  There are no scriptlets,
     * etc in this stream.
     *
     * @returns the value of this BodyJspWriter as a Reader
     */
    public Reader getReader() {
        return new CharArrayReader (cb, 0, nextChar);
    }

    /**
     * Return the value of the BodyJspWriter as a String.
     * Note: this is after evaluation!!  There are no scriptlets,
     * etc in this stream.
     *
     * @returns the value of the BodyJspWriter as a String
     */
    public String getString() {
        return new String(cb, 0, nextChar);
    }
	
    /**
     * Write the contents of this BodyJspWriter into a Writer.
     * Subclasses are likely to do interesting things with the
     * implementation so some things are extra efficient.
     *
     * @param out The writer into which to place the contents of
     * this body evaluation
     */
    public void writeOut(Writer out) throws IOException {
        out.write(cb, 0, nextChar);
	// Flush not called as the writer passed could be a BodyContent and
	// it doesn't allow to flush.
    }


    public static void main (String[] args) throws Exception {
	char[] buff = {'f','o','o','b','a','r','b','a','z','y'};
   	BodyContentImpl bodyContent = new BodyContentImpl(new JspWriterImpl(
							null, 100, false));
	bodyContent.println (buff);
	System.out.println (bodyContent.getString ());
	bodyContent.writeOut (new PrintWriter (System.out));
    }
}