mysql怎么放入图片_怎么将图片添加到mysql中

将图片添加到mysql中的方法：首先将数据库存储图片的字段类型设置为blob二进制大对象类型；然后将图片流转化为二进制；最后将图片插入数据库即可。

正常的图片储存要么放进本地磁盘，要么就存进数据库。存入本地很简单，现在我在这里记下如何将图片存进mysql数据库

如果要图片存进数据库 要将图片转化成二进制。

1.数据库存储图片的字段类型要为blob二进制大对象类型

2.将图片流转化为二进制

下面放上代码实例

一、数据库CREATE TABLE `photo` (

`id` int(11) NOT NULL,

`name` varchar(255) DEFAULT NULL,

`photo` blob,

PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

二、数据库链接/**

*

*/

package JdbcImgTest;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

/**

* @author Administrator

*

*/

public class DBUtil

{

// 定义数据库连接参数

public static final String DRIVER_CLASS_NAME = "com.mysql.jdbc.Driver";

public static final String URL = "jdbc:mysql://localhost:3306/test";

public static final String USERNAME = "root";

public static final String PASSWORD = "root";

// 注册数据库驱动

static

{

try

{

Class.forName(DRIVER_CLASS_NAME);

}

catch (ClassNotFoundException e)

{

System.out.println("注册失败！");

e.printStackTrace();

}

}

// 获取连接

public static Connection getConn() throws SQLException

{

return DriverManager.getConnection(URL, USERNAME, PASSWORD);

}

// 关闭连接

public static void closeConn(Connection conn)

{

if (null != conn)

{

try

{

conn.close();

}

catch (SQLException e)

{

System.out.println("关闭连接失败！");

e.printStackTrace();

}

}

}

//测试

/* public static void main(String[] args) throws SQLException

{

System.out.println(DBUtil.getConn());

}

*/

}

三、图片流package JdbcImgTest;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

/**

* @author Administrator

*

*/

public class ImageUtil

{

// 读取本地图片获取输入流

public static FileInputStream readImage(String path) throws IOException

{

return new FileInputStream(new File(path));

}

// 读取表中图片获取输出流

public static void readBin2Image(InputStream in, String targetPath)

{

File file = new File(targetPath);

String path = targetPath.substring(0, targetPath.lastIndexOf("/"));

if (!file.exists())

{

new File(path).mkdir();

}

FileOutputStream fos = null;

try

{

fos = new FileOutputStream(file);

int len = 0;

byte[] buf = new byte[1024];

while ((len = in.read(buf)) != -1)

{

fos.write(buf, 0, len);

}

fos.flush();

}

catch (Exception e)

{

e.printStackTrace();

}

finally

{

if (null != fos)

{

try

{

fos.close();

}

catch (IOException e)

{

e.printStackTrace();

}

}

}

}

}

四、转码存储package JdbcImgTest;

import java.io.FileInputStream;

import java.io.InputStream;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

/**

* @author Administrator 测试写入数据库以及从数据库中读取

*/

public class ImageDemo

{

// 将图片插入数据库

public static void readImage2DB()

{

String path = "D:/Eclipse/eclipseWorkspace/TestProject/Img/mogen.jpg";

Connection conn = null;

PreparedStatement ps = null;

FileInputStream in = null;

try

{

in = ImageUtil.readImage(path);

conn = DBUtil.getConn();

String sql = "insert into photo (id,name,photo)values(?,?,?)";

ps = conn.prepareStatement(sql);

ps.setInt(1, 1);

ps.setString(2, "Tom");

ps.setBinaryStream(3, in, in.available());

int count = ps.executeUpdate();

if (count > 0)

{

System.out.println("插入成功！");

}

else

{

System.out.println("插入失败！");

}

}

catch (Exception e)

{

e.printStackTrace();

}

finally

{

DBUtil.closeConn(conn);

if (null != ps)

{

try

{

ps.close();

}

catch (SQLException e)

{

e.printStackTrace();

}

}

}

}

// 读取数据库中图片

public static void readDB2Image()

{

String targetPath = "C:/Users/Jia/Desktop/mogen.jpg";

Connection conn = null;

PreparedStatement ps = null;

ResultSet rs = null;

try

{

conn = DBUtil.getConn();

String sql = "select * from photo where id =?";

ps = conn.prepareStatement(sql);

ps.setInt(1, 1);

rs = ps.executeQuery();

while (rs.next())

{

InputStream in = rs.getBinaryStream("photo");

ImageUtil.readBin2Image(in, targetPath);

}

}

catch (Exception e)

{

e.printStackTrace();

}

finally

{

DBUtil.closeConn(conn);

if (rs != null)

{

try

{

rs.close();

}

catch (SQLException e)

{

e.printStackTrace();

}

}

if (ps != null)

{

try

{

ps.close();

}

catch (SQLException e)

{

e.printStackTrace();

}

}

}

}

//测试

public static void main(String[] args)

{

//readImage2DB();

readDB2Image();

}

}