Struts2中用itext实现PDF文件导出

先看struts2配置文件：

<action name="generateContract" class="contractAction" method="generateContract">
            <result name="success" type="stream">
                <param name="contentType">application/pdf; charset=gb2312</param>
                <param name="inputName">pdfStream</param>
                <param name="contentDisposition">attachment; filename="contract.pdf"</param>
                <param name="bufferSize">2048</param>
            </result>
</action>

再看action类：

import com.lowagie.text.Document;
import com.lowagie.text.Font;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfWriter;
private InputStream pdfStream;

	/**
	 * 倒出PDF合同
	 * @return
	 */
	public String generateContract() throws Exception{
		Document document = new Document();
		
		BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
		Font FontChinese = new Font(bfChinese); 
		
		ByteArrayOutputStream buffer = new ByteArrayOutputStream();
		PdfWriter.getInstance(document, buffer);
		document.open();
		document.add(new Paragraph("中文Hello World",FontChinese));
		document.close();

		this.pdfStream = new ByteArrayInputStream(buffer.toByteArray());
		buffer.close();
		return SUCCESS;
	}

public InputStream getPdfStream() {
		return pdfStream;
	}