Request.java 文件源码

/**
 * Return the servlet input stream for this Request.  The default
 * implementation returns a servlet input stream created by
 * <code>createInputStream()</code>.
 *
 * @exception IllegalStateException if <code>getReader()</code> has
 *  already been called for this request
 * @exception IOException if an input/output error occurs
 */
@Override
public ServletInputStream getInputStream() throws IOException {

    if (usingReader) {
        throw new IllegalStateException
            (sm.getString("coyoteRequest.getInputStream.ise"));
    }

    usingInputStream = true;
    if (inputStream == null) {
        inputStream = new CoyoteInputStream(inputBuffer);
    }
    return inputStream;

}