<Object>方式打开保存在数据库中PDF文件,IE6显示,IE7/8就不显示########在线等#########

Question

本帖最后由 wanliang2001 于 2010-07-19 16:47:44 编辑

Answer 1

2008-08-28 zhaipuhong (资深程序员)
这个还不容易。把PDF文件写入response流里面就可以了！ 
方法有很多，这里给个独立又简单的例子： Java代码 
1.package com.zhaipuhong.j2se.pdf;   
2.  
3.import java.io.IOException;   
4.import java.util.Date;   
5.  
6.import javax.servlet.ServletException;   
7.import javax.servlet.http.HttpServlet;   
8.import javax.servlet.http.HttpServletRequest;   
9.import javax.servlet.http.HttpServletResponse;   
10.  
11.import com.lowagie.text.Document;   
12.import com.lowagie.text.DocumentException;   
13.import com.lowagie.text.Paragraph;   
14.import com.lowagie.text.pdf.PdfWriter;   
15.import com.lowagie.text.pdf.BaseFont;   
16.import com.lowagie.text.pdf.PdfPTable;   
17.import com.lowagie.text.pdf.PdfPCell;   
18.import java.awt.Color;   
19.  
20.public class PdfServlet extends HttpServlet {   
21.  
22.    private static final long serialVersionUID = -6033026500372479591L;   
23.  
24.    public void doGet (HttpServletRequest request, HttpServletResponse response)   
25.    throws IOException, ServletException {   
26.  
27.        // step 1  建立文档对象   
28.        Document document = new Document();   
29.        try {   
30.                //设置文档相应类型   
31.                response.setContentType("application/pdf");   
32.                PdfWriter.getInstance(document, response.getOutputStream());   
33.  
34.  
35.                // step 3  打开文档   
36.                document.open();   
37.                //支持中文   
38.                BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);   
39.                com.lowagie.text.Font FontChinese = new com.lowagie.text.Font(bfChinese, 12, com.lowagie.text.Font.NORMAL);   
40.                Paragraph pragraph=new Paragraph("你好", FontChinese);   
41.  
42.  
43.                // step 4  向文档中添加内容   
44.                document.add(pragraph);   
45.                document.add(new Paragraph(" Hello World !"));   
46.                document.add(new Paragraph("Date 时间"+new Date().toString()));   
47.                document.add(new Paragraph(new Date().toString()));   
48.                document.add(new Paragraph(new Date().toString()));   
49.  
50.  
51.  
52.                PdfPTable table = new PdfPTable(3);   
53.                        PdfPCell cell = new PdfPCell(new Paragraph("header with colspan 3"));   
54.                        cell.setColspan(3);   
55.                        table.addCell(cell);   
56.                        table.addCell("1.1");   
57.                        table.addCell("2.1");   
58.                        table.addCell("3.1");   
59.                        table.addCell("1.2");   
60.                        table.addCell("2.2");   
61.                        table.addCell("3.2");   
62.                        cell = new PdfPCell(new Paragraph("cell test1"));   
63.                        cell.setBorderColor(new Color(255, 0, 0));   
64.                        table.addCell(cell);   
65.                        cell = new PdfPCell(new Paragraph("cell test2"));   
66.                        cell.setColspan(2);   
67.                        cell.setBackgroundColor(new Color(0xC0, 0xC0, 0xC0));   
68.                        table.addCell(cell);   
69.                        document.add(table);   
70.  
71.        }catch(DocumentException de) {   
72.            de.printStackTrace();   
73.            System.err.println("document: " + de.getMessage());   
74.        }   
75.  
76.        // step 5: 关闭文档对象   
77.        document.close();   
78.    }   
79.  
80.    //支持中文   
81.    public Paragraph getChineseString(String chineseString){   
82.      Paragraph pragraph=null;   
83.      BaseFont bfChinese = null;   
84.      try {   
85.        bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",   
86.                                        BaseFont.NOT_EMBEDDED);   
87.        com.lowagie.text.Font FontChinese = new com.lowagie.text.Font(bfChinese,   
88.            12, com.lowagie.text.Font.NORMAL);   
89.         pragraph = new Paragraph(chineseString, FontChinese);   
90.      }   
91.      catch (Exception ex) {   
92.        ex.printStackTrace();   
93.      }   
94.      return pragraph;   
95.    }   
96.}  
package com.zhaipuhong.j2se.pdf;import java.io.IOException;
import java.util.Date;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import com.lowagie.text.Document;
import com.lowagie.text.DocumentException;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfPTable;
import com.lowagie.text.pdf.PdfPCell;
import java.awt.Color;public class PdfServlet extends HttpServlet {    private static final long serialVersionUID = -6033026500372479591L;    public void doGet (HttpServletRequest request, HttpServletResponse response)
    throws IOException, ServletException {        // step 1  建立文档对象
        Document document = new Document();
        try {
                //设置文档相应类型
                response.setContentType("application/pdf");
                PdfWriter.getInstance(document, response.getOutputStream());
                // step 3  打开文档
                document.open();
                //支持中文
                BaseFont bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
                com.lowagie.text.Font FontChinese = new com.lowagie.text.Font(bfChinese, 12, com.lowagie.text.Font.NORMAL);
                Paragraph pragraph=new Paragraph("你好", FontChinese);
                // step 4  向文档中添加内容
                document.add(pragraph);
                document.add(new Paragraph(" Hello World !"));
                document.add(new Paragraph("Date 时间"+new Date().toString()));
                document.add(new Paragraph(new Date().toString()));
                document.add(new Paragraph(new Date().toString()));                PdfPTable table = new PdfPTable(3);
                        PdfPCell cell = new PdfPCell(new Paragraph("header with colspan 3"));
                        cell.setColspan(3);
                        table.addCell(cell);
                        table.addCell("1.1");
                        table.addCell("2.1");
                        table.addCell("3.1");
                        table.addCell("1.2");
                        table.addCell("2.2");
                        table.addCell("3.2");
                        cell = new PdfPCell(new Paragraph("cell test1"));
                        cell.setBorderColor(new Color(255, 0, 0));
                        table.addCell(cell);
                        cell = new PdfPCell(new Paragraph("cell test2"));
                        cell.setColspan(2);
                        cell.setBackgroundColor(new Color(0xC0, 0xC0, 0xC0));
                        table.addCell(cell);
                        document.add(table);        }catch(DocumentException de) {
            de.printStackTrace();
            System.err.println("document: " + de.getMessage());
        }        // step 5: 关闭文档对象
        document.close();
    }    //支持中文
    public Paragraph getChineseString(String chineseString){
      Paragraph pragraph=null;
      BaseFont bfChinese = null;
      try {
        bfChinese = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",
                                        BaseFont.NOT_EMBEDDED);
        com.lowagie.text.Font FontChinese = new com.lowagie.text.Font(bfChinese,
            12, com.lowagie.text.Font.NORMAL);
         pragraph = new Paragraph(chineseString, FontChinese);
      }
      catch (Exception ex) {
        ex.printStackTrace();
      }
      return pragraph;
    }
}--------------------------------------------------------------------------------
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