JAVA中存文件到ORACLE数据库里怎么做?
发布网友
发布时间：2022-05-03 11:16
共3个回答
热心网友
时间：2022-05-03 12:45
public class InsertBlobData {
Connection con = null;
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
// TODO Auto-generated method stub
InsertBlobData data = new InsertBlobData();
data.insertBlogInfo("002jpg", "sdsdfdf", "2007-02-12", "002.jpg");
}
public void insertBlogInfo(String jmzh, String xm, String smsj,
String fileName) throws Exception {
//try {
con = ConnectionPoliceFactory.getFactory().getConnection();
//} catch (ClassNotFoundException e) {
//// TODO Auto-generated catch block
//e.printStackTrace();
//}
// 处理事务
boolean defaultCommit = con.getAutoCommit();
con.setAutoCommit(false);
Statement st = con.createStatement();
// 插入一个空对象
st.executeUpdate("insert into ksren_txxx(jmzh,xm,smsj,txsj) values('"
+ jmzh + "','" + xm + "',to_date('" + smsj
+ "','yyyy-mm-dd'),empty_blob())");
// 用for update方式锁定数据行
ResultSet rs = st
.executeQuery("select txsj from ksren_txxx where jmzh='"
+ jmzh + "' and xm='" + xm + "' for update");
if (rs.next()) {
// 得到java.sql.Blob对象，然后Cast为oracle.sql.BLOB
oracle.sql.BLOB blob = (oracle.sql.BLOB) rs.getBlob(1);
// 到数据库的输出流
OutputStream outStream = blob.getBinaryOutputStream();
// 这里用一个文件模拟输入流
InputStream fin = new FileInputStream(new File(fileName));
// 将输入流写到输出流
byte[] b = new byte[blob.getBufferSize()];
int len = 0;
while ((len = fin.read(b)) != -1) {
outStream.write(b, 0, len);
// blob.putBytes(1,b);
}
// 依次关闭（注意顺序）
fin.close();
outStream.flush();
outStream.close();
con.commit();
/* 恢复原提交状态 */
con.setAutoCommit(defaultCommit);
con.close();
}
}
}
热心网友
时间：2022-05-03 14:03
import com.jspdev.util.*;
import java.sql.*;
import javax.sql.*;
import java.io.*;
import oracle.jdbc.driver.OracleResultSet;
import oracle.sql.BLOB;
public class BlobBean
{
Connection conn ;
/**
*构造方法,创建Connection对象，并且在数据库中添加一个表。
*/
public BlobBean()throws Exception
{
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
conn = DriverManager.getConnection("jdbc:oracle:thin:system@127.0.0.1:1521:hellking", "system", "manager");
// conn.createStatement().execute("create table blobtable(blobvalue blob)");
}
/**
*写入Blob数据到数据库
*/
public void addBlob(String fileName)throws Exception
{
conn.setAutoCommit(false);
Statement stmt = conn.createStatement();
stmt.execute("insert into blobtable values (empty_blob())");
ResultSet rset = stmt.executeQuery("SELECT blobvalue FROM blobtable FOR UPDATE");
BLOB blob = null;
while (rset.next()) {
blob = ((OracleResultSet) rset).getBLOB(1);
System.out.println(blob.length());
}
File binaryFile = new File(fileName);
System.out.println(fileName+"'s length = " + binaryFile.length());
FileInputStream instream = new FileInputStream(binaryFile);
OutputStream outstream = blob.getBinaryOutputStream();
int chunk = blob.getChunkSize();
System.out.println("chunk size = " + chunk);
byte[] buffer = new byte[chunk];
int length = -1;
while ((length = instream.read(buffer)) != -1)
outstream.write(buffer, 0, length);
instream.close();
outstream.close();
conn.commit();
}
热心网友
时间：2022-05-03 15:38
我不知道怎么回答你
