请参考以下代码：
long position = page.getLastGraphicsObjectPosition(e_TypeText);
TextObject text_object = TextObject.create();
text_object.setFillColor(0xFFFF7F00);
// 创建 text state对象。
TextState state = new TextState();
state.setFont_size(80.0f);
state.setFont(new Font("Simsun", e_StylesSmallCap, e_CharsetGB2312, 0));
state.setTextmode(e_ModeFill);
text_object.setTextState(page, state, false, 750);
//设置文本。
text_object.setText("Foxit Software");
long last_position = page.insertGraphicsObject(position, text_object);
RectF rect = text_object.getRect();
float offset_x = (page.getWidth() - (rect.getRight() - rect.getLeft())) / 2;
float offset_y = page.getHeight() * 0.8f - (rect.getTop() - rect.getBottom()) / 2;
text_object.transform(new Matrix2D(1, 0, 0, 1, offset_x, offset_y), false);
//生成内容。
page.generateContent();
