Java代码
- 一、数据库端操作:
- 1 在mysql下建一个数据库名字叫 testpic
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- mysql>create database testpic;
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- 2 在testpic库下建一数据表test,只有两字段
- ===>
- mysql>use testpic;
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- ===>
- mysql>create table test (id int, pic blob);
一、数据库端操作:1 在mysql下建一个数据库名字叫 testpic ===> mysql>create database testpic;2 在testpic库下建一数据表test,只有两字段 ===> mysql>use testpic; ===> mysql>create table test (id int, pic blob);
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二、相关的html jsp文件
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登录界面 postblob.html
Java代码
- nbsp;html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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Insert title here
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title><center><form action="testblob.jsp" method="post"><table width="291" border="1"> <tr> <td width="107">id </td> <td width="168"><input name="id" type="text"></td> </tr> <tr> <td>file</td> <td><input name="file" type="file"></td> </tr> <tr> <td><input type="submit" value="提交"></td> </tr>
</table></form></center>
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readblob.jsp界面源码
Java代码
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- pageEncoding="UTF-8"%>
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- nbsp;html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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Insert title here
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- java.sql.Connection conn;
- ResultSet rs=null;
- Class.forName("com.mysql.jdbc.Driver").newInstance();
- conn= java.sql.DriverManager.getConnection("jdbc:mysql://localhost/testpic","root","root");
- Statement stmt=conn.createStatement();
- rs=stmt.executeQuery("select * from test where id=1");
- if(rs.next())
- {
- Blob b = rs.getBlob("pic");
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- int size =(int)b.length();
- out.print(size);
- InputStream in=b.getBinaryStream();
- byte[] by= new byte[size];
- response.setContentType("image/jpeg");
- ServletOutputStream sos = response.getOutputStream();
- int bytesRead = 0;
- while ((bytesRead = in.read(by)) != -1) {
- sos.write(by, 0, bytesRead);
- }
- in.close();
- sos.flush();
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- }
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- %>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title>
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testblob.jsp界面源码
Java代码
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- pageEncoding="UTF-8"%>
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- nbsp;html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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Insert title here
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- String id=request.getParameter("id");
- String file=request.getParameter("file");
- out.print(id);
- out.print(file);
- FileInputStream str=new FileInputStream(file);
- out.print(str.available());
- java.sql.Connection conn;
- java.lang.String strConn;
- Class.forName("com.mysql.jdbc.Driver").newInstance();
- conn= java.sql.DriverManager.getConnection("jdbc:mysql://localhost/testpic","root","root");
- String sql="insert into test(id,pic) values(?,?)";
- PreparedStatement pstmt=conn.prepareStatement(sql);
- pstmt.setString(1,id);
- pstmt.setBinaryStream(2,str,str.available());
- pstmt.execute();
- out.println("Success,You Have Insert an Image Successfully");
- pstmt.close();
- %>
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查看图片
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返回
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