//检测图片宽高

public static Map getPicWH(String imagePath) {

Map mp = new HashMap();

File _file = new File(imagePath);

Image src;

try {

src = ImageIO.read(_file);

// 图片的宽度

int width = src.getWidth(null); //读取文件的长宽

// 图片的高度

int height = src.getHeight(null);

mp.put("width", width);

mp.put("height", height);

} catch (IOException e) {

e.printStackTrace();

}

return mp;

}

//检测图片大小

public Long image2byte(String path) {

byte[] data = null;

FileImageInputStream input = null;

try {

input = new FileImageInputStream(new File(path));

ByteArrayOutputStream output = new ByteArrayOutputStream();

byte[] buf = new byte[1024];

int numBytesRead = 0;

while ((numBytesRead = input.read(buf)) != -1) {

output.write(buf, 0, numBytesRead);

}

data = output.toByteArray();

output.close();

input.close();

} catch (FileNotFoundException ex1) {

ex1.printStackTrace();

} catch (IOException ex1) {

ex1.printStackTrace();

}

return Long.valueOf(data.length);

}

//获取BLOB文件生成图片

public static boolean getBlobFile(InputStream in,String sFullName) {

File file = new File(sFullName);

RandomAccessFile rFile = null;

try {

rFile = new RandomAccessFile(file, "rw");

rFile.seek(0);

byte bytes[] = new byte[1024];

int ch = 0;

while ((ch = in.read(bytes)) != -1)

rFile.write(bytes, 0, ch);

rFile.close();

return true;

} catch (Exception ex) {

ex.printStackTrace();

return false;

}

}

注：sFullName是保存路径，in是获取的BLOB库文件

如：in = rs.getBinaryStream("content");

//一个完整的插入BLOB文件的测试类

import java.io.BufferedInputStream;

import java.io.FileInputStream;

import java.io.PrintStream;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

public class Test {

private Connection conn;

public Connection getConnection() {

try {

Class.forName("oracle.jdbc.driver.OracleDriver");

conn = DriverManager.getConnection(

"jdbc:oracle:thin:@localhost:1521:cxh", "cxh", "cxh");

} catch (ClassNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return conn;

}

public int insertImage(String path) throws Exception {

int i = 0;

Statement st = null;

ResultSet rs = null;

conn=this.getConnection();

conn.setAutoCommit(false);//设置数据库为不自动提交，必须的一步

st = conn.createStatement();

//先插入一个空对象，这里我调用了Empty_BLOB()函数

i = st.executeUpdate("insert into zzy_tb_mmscontent (contentid, content) values (seq_zzy_tb_mmscontent.Nextval,Empty_BLOB())");

//以行的方式锁定

rs = st.executeQuery("select content from zzy_tb_mmscontent where contentid=(select max(contentid) from zzy_tb_mmscontent) for update");

if (rs.next()) {

//得到流

oracle.sql.BLOB blob = (oracle.sql.BLOB) rs.getBlob(1);

//从得到的低级流构造一个高级流

PrintStream ps = new PrintStream(blob.getBinaryOutputStream());

BufferedInputStream bis = new BufferedInputStream(

new FileInputStream(path));

byte[] buff = new byte[1024];

int n = 0;

//从输入到输出

while ((n = bis.read(buff)) != -1) {

ps.write(buff, 0, n);

}

//清空流的缓存

ps.flush();

//关闭流，注意一定要关

ps.close();

bis.close();

}

rs.close();

st.close();

conn.close();

return i;

}

public static void main(String[] args) throws Exception {

Test test=new Test();

test.insertImage("e://ni.gif");

System.out.println("OK");

}

}