JAVA 读取pdf文件

时间：2021-07-02 01:48:26

第一个路口action

/*

 * wuhan syspro author zhangrui 2010/08/23

*/

package jp.co.syspro.poo.action;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

public class PrintPdfAction extends Action{

	public ActionForward execute(ActionMapping mapping, ActionForm form,

	HttpServletRequest request, HttpServletResponse response)

			throws Exception {

		PdfExport pdf = new PdfExport();

		String id=request.getParameter("id");

		pdf.make(request,response,id);

		return null;

		}

}

进行输出方法

/*

 * author syspro wuhan zhangrui 2010/8/20

*/

package jp.co.syspro.poo.action;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.ArrayList;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import com.lowagie.text.pdf.PdfPageEventHelper;

import com.lowagie.text.pdf.BaseFont;

import com.lowagie.text.pdf.PdfTemplate;

import jp.co.syspro.poo.dao.System3Dao;

public class PdfExport extends PdfPageEventHelper {

	    public PdfTemplate tpl;

	    public BaseFont bf;

	    public void make(HttpServletRequest request, HttpServletResponse response,String id) throws Exception{

	    	ArrayList f_file2=System3Dao.getInstance().getFile(id);

	    	InputStream f_file=(InputStream)f_file2.get(0);

	    	Integer f_size=Integer.parseInt(f_file2.get(1).toString());

	    	response.reset();

			response.setContentType("application/pdf");

			OutputStream output = response.getOutputStream();

			InputStream fis = f_file;

			byte[] b = new byte[f_size];

			int i = 0;

			while ((i = fis.read(b)) > 0) {

				output.write(b, 0, i);

			}

			output.flush();

	    }

}

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