JFreeChart类：void setAntiAlias(boolean flag) 字体模糊边界void setBackgroundImage(Image image) 背景图片void setBackgroundImageAlignment(int alignment) 背景图片对齐方式（参数常量在org.jfree.ui.Align类中定义）void setBackgroundImageAlpha(float alpha) 背景图片透明度（0.0～1.0）void setBackgroundPaint(Paint paint) 背景色void setBord...