APACHE Geronimo 试用之JDBC

1、通过控制台创建相应的数据库，PICTURES表以及数据库连接池：
其中表的创建语句如下：

create table pictures(name varchar ( 32 ) not null primary key , pic blob(16M));

更多具体内容请参考：http://cwiki.apache.org/GMOxDOC21/web-application-for-jdbc-access.html

2、实现图片上传：

package jdbc;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;

public class ImageUpload extends javax.servlet.http.HttpServlet implements
javax.servlet.Servlet

{
    @Resource(name = "jdbc/usersds")
    private DataSource ds;
    static final long serialVersionUID = 1L;

    public ImageUpload()

{
        super();
    }

    protected void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException

{
        doProcess(request, response);
    }

    protected void doProcess(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException

{
        Connection dbconnect = null;
        PreparedStatement stmnt = null;
        String pic = request.getParameter("ImageLoc");
        String name = request.getParameter("ImageName");
        try

{
            File f = new File(pic);
            FileInputStream fis = new FileInputStream(f);
            dbconnect = ds.getConnection();
            stmnt = dbconnect.prepareStatement("INSERT INTO PICTURES ("
                    + "NAME," + "PIC )" + " VALUES(?,?)");
            stmnt.setString(1, name);
            stmnt.setBinaryStream(2, fis, (int) f.length());
            stmnt.execute();
            PrintWriter out = response.getWriter();
            out.println("<html>");
            out.println("<body>");
            out
                    .println("Congratulations your image has been successfully uploaded");
            String html = "<a href='/WebJDBC/ImageDownload?ImageName=" + name
                    + ">view the image</a>";
            out.println(html);
            out.println("</body>");
            out.println("</html>");

        } catch (Exception e)

{
e.printStackTrace();
} finally

{
try

{
                dbconnect.close();
                stmnt.close();
            } catch (SQLException e)

{
                e.printStackTrace();
            }
        }
    }

    protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException

{
doProcess(request, response);
}
}

3、实现图片下载：

package jdbc;

import java.io.IOException;
import java.io.OutputStream;
import java.sql.Blob;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.annotation.Resource;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;

public class ImageDownload extends javax.servlet.http.HttpServlet implements
javax.servlet.Servlet

{
    @Resource(name = "jdbc/usersds")
    private DataSource ds;
    static final long serialVersionUID = 1L;

    public ImageDownload()

{
        super();
    }

    protected void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException

{
        doProcess(request, response);
    }

    protected void doProcess(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException

{
        Connection dbconnect = null;
        ResultSet rs = null;
        PreparedStatement stmnt = null;
        try

{
            dbconnect = ds.getConnection();
            String s = request.getParameter("ImageName");
            stmnt = dbconnect
                    .prepareStatement("SELECT PIC FROM PICTURES WHERE NAME=?");
            stmnt.setString(1, s);
            rs = stmnt.executeQuery();
            if (rs.next())

{
                // Get as a BLOB
                Blob aBlob = rs.getBlob(1);
                byte[] b = new byte[4096];
                java.io.InputStream ip = aBlob.getBinaryStream();
                OutputStream out = null;
                int c = 0;
                out = response.getOutputStream();
                response.setContentType("image/jpeg");
                while (c != -1)

{
                    c = ip.read(b);
                    out.write(b);
                    out.flush();
                }
                ip.close();

            }

        } catch (Exception e)

{
e.printStackTrace();
} finally

{
try

{
                dbconnect.close();
                stmnt.close();
                rs.close();
            } catch (SQLException e)

{
                e.printStackTrace();
            }
        }

    }

    protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException

{
doProcess(request, response);
}
}

4、图片上传JSP页面：

@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1" %>
<! DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" >
< html >
< head >
< meta http-equiv ="Content-Type" content ="text/html; charset=ISO-8859-1" >
< title > Image Upload </ title >
</ head >
< body >
< h2 > Select a Image and Upload it </ h2 >
< form action ="/WebJDBC/ImageUpload" >
< table >
     < tr >
         < td > Location of the Image(full path) </ td >
         < td >< Input type ="text" name ="ImageLoc" ></ td >
     </ tr >
     < tr >
         < td > Name of the Image(Unique Name) </ td >
         < td >< Input type ="text" name ="ImageName" ></ td >
     </ tr >
     < tr >
         < td >< Input type ="submit" value ="submit" ></ td >
     < tr >
</ table >
</ form >
</ body >
</ html >

5、图片下载JSP页面：

@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1" %>
<! DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd" >
< html >
< head >
< meta http-equiv ="Content-Type" content ="text/html; charset=ISO-8859-1" >
< title > Download Image </ title >
</ head >
< body >
< h2 > Name a Image to download </ h2 >
< form action ="/WebJDBC/ImageDownload" >
< table >
< tr >
< td >
Name of the Image
</ td >
< td >
< Input type ="text" name ="ImageName" >
</ td >
</ tr >
< tr >
< td >
< Input type ="submit" value ="submit" >
</ td >
< tr >
</ table >
</ form >
</ body >
</ html >

6、geronimo-web.xml的配置：

<? xml version="1.0" encoding="UTF-8" ?>
< web-app xmlns ="http://geronimo.apache.org/xml/ns/j2ee/web-2.0.1"
    xmlns:nam ="http://geronimo.apache.org/xml/ns/naming-1.2"
    xmlns:sec ="http://geronimo.apache.org/xml/ns/security-2.0"
    xmlns:sys ="http://geronimo.apache.org/xml/ns/deployment-1.2" >
     < sys:environment >
         < sys:moduleId >
             < sys:groupId > default </ sys:groupId >
             < sys:artifactId > WebJDBC </ sys:artifactId >
             < sys:version > 1.0 </ sys:version >
             < sys:type > car </ sys:type >
         </ sys:moduleId >
         < sys:dependencies >
             < sys:dependency >
                 < sys:groupId > console.dbpool </ sys:groupId >
                 < sys:artifactId > jdbc_usersds </ sys:artifactId >
             </ sys:dependency >
         </ sys:dependencies >
     </ sys:environment >
     < context-root > /WebJDBC </ context-root >
     < nam:resource-ref >
         < nam:ref-name > jdbc/usersds </ nam:ref-name >
         < nam:pattern >
             < nam:groupId > console.dbpool </ nam:groupId >
             < nam:artifactId > jdbc_usersds </ nam:artifactId >
             < nam:name > jdbc/usersds </ nam:name >
         </ nam:pattern >
     </ nam:resource-ref >
</ web-app >

7、WEB.XML文件的配置：

<? xml version="1.0" encoding="UTF-8" ?>
< web-app xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
    xmlns ="http://java.sun.com/xml/ns/javaee" xmlns:web ="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xsi:schemaLocation ="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id ="WebApp_ID" version ="2.5" >
     < display-name > WebJDBC </ display-name >
     < welcome-file-list >
         < welcome-file > index.jsp </ welcome-file >
     </ welcome-file-list >
     < servlet >
         < description ></ description >
         < display-name > ImageUpload </ display-name >
         < servlet-name > ImageUpload </ servlet-name >
         < servlet-class > jdbc.ImageUpload </ servlet-class >
     </ servlet >
     < servlet >
         < description ></ description >
         < display-name > ImageDownload </ display-name >
         < servlet-name > ImageDownload </ servlet-name >
         < servlet-class > jdbc.ImageDownload </ servlet-class >
     </ servlet >
     < servlet-mapping >
         < servlet-name > ImageUpload </ servlet-name >
         < url-pattern > /ImageUpload </ url-pattern >
     </ servlet-mapping >
     < servlet-mapping >
         < servlet-name > ImageDownload </ servlet-name >
         < url-pattern > /ImageDownload </ url-pattern >
     </ servlet-mapping >
</ web-app >

8、发布及测试：
将应用打包成WebJDBC.war，发布之后通过访问 http://localhost:8080/WebJDBC/即可看到程序运行效果，附件请点击此处下载http://www.blogjava.net/Files/kinkding/WebJDBC.rar

APACHE Geronimo 试用之JDBC

APACHE Geronimo 试用之JDBC

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