Orcal Blob 更新 新增 下载 数据库数据（update）

package com.lyon.hibernate.blob;


import java.io.*;


import java.sql.*;


import com.lyon.hibernate.dao.IPrintDao;
import com.lyon.hibernate.pojo.Print;
import com.lyon.hibernate.util.BeanFactory;


import oracle.sql.BLOB;


/**
 * 
 * 功            能：向 分发 数据库  (update) 新增blob
 * 时            间：2017年12月28日上午10:52:18
 *@author  
 */
public class saveXmlBlob {


	public void  addBlob(String policyCode) throws SQLException {


		/**调用printDao接口*/
		IPrintDao printDao=(IPrintDao) BeanFactory.getBean("printDao");
		Connection con = null;
		long start = System.currentTimeMillis(); // count runtime
		
		/**
		 * 通过存储过程更新数据库
		 */
		CallableStatement pstmt = null;
		InputStream fin = null;
		OutputStream outStream = null;
		
		/**文件所在地，将其写入到数据库*/
		String path = "D:\\test.xml";
		File file = new File(path);
		
		/**得到打印的对象，通过对象的得到Id*/
		Print p=printDao.getPrintCode(policyCode);
		try {
			con = DBConnection.getDBConnection();
			con.setAutoCommit(false);
			String sql = "update TAB_PUBLISH set XMLBLOB=? where PUBLISHID=?";
			pstmt = con.prepareCall(sql);


			Blob xmlblob = BLOB.empty_lob();
			pstmt.setBlob(1, xmlblob);
			pstmt.setInt(2, p.getPrinId());
			pstmt.execute();
			System.out.print("instert ok\n");
			Statement stmt = con.createStatement();
			
			/** 调用存储过程，将文件写入到数据库 */
			ResultSet rs = stmt.executeQuery("select xmlblob from TAB_PUBLISH for update");




			while (rs.next()) {
				BLOB blob = (BLOB) rs.getBlob("xmlblob");
				outStream = blob.getBinaryOutputStream();
				fin = new FileInputStream(file); // put file into stream
				byte[] b = new byte[blob.getBufferSize()];
				int len = 0;
				while ((len = fin.read(b)) != -1) {
					outStream.write(b, 0, len);
				}
				/*fin.close();
				outStream.flush();
				outStream.close();*/
			}
			System.out.print("\nupdate ok\n");
			con.commit();
		}
		catch (Exception e) {
			e.printStackTrace();
		}finally {
			try {
				fin.close();
				outStream.flush();
				outStream.close();
				con.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		//con.close();
		long end = System.currentTimeMillis();
		System.out.println(end - start);
	}


}


package com.lyon.hibernate.blob;

import java.io.*;

import java.sql.*;

import oracle.sql.BLOB;

/***
 * 描            述：(无实际意义，仅仅用作参考)
 * 功            能：新增blob 到 TAB_BLOB_TEST表的demo
 * 时            间：2017年12月28日上午10:56:42
 *@author  
 */
public class bolb_test {

	public void  addBlob() throws SQLException {
		Connection con = null;
		long start = System.currentTimeMillis(); // count runtime
		CallableStatement pstmt = null;
		InputStream fin = null;
		OutputStream outStream = null;
		String path = "D:\\test.xml";
		File file = new File(path);
		try {
			con = DBConnection.getDBConnection();
			con.setAutoCommit(false);
			String sql = "insert into TAB_BLOB_TEST values(?,?,?)";
			
			// insert database
			pstmt = con.prepareCall(sql);
			for (int i = 0; i < 10; i++)
			{
				String name = "Young_" + i;
				int id = 1;
				pstmt.setInt(1, id + i);
				pstmt.setString(2, name);
				Blob word = BLOB.empty_lob();
				pstmt.setBlob(3, word);
				pstmt.execute();
			}
			System.out.print("instert ok\n");
			Statement stmt = con.createStatement();
			ResultSet rs = stmt.executeQuery("select id,word from TAB_BLOB_TEST for update");
			// get specially columns and rows for update
			while (rs.next()) {
				// System.out.print(rs.getInt(1)+rs.getString(2)+"\n");//print select sql for
				// debug
				BLOB blob = (BLOB) rs.getBlob("word");
				outStream = blob.getBinaryOutputStream();
				fin = new FileInputStream(file); // put file into stream
				byte[] b = new byte[blob.getBufferSize()];
				int len = 0;
				while ((len = fin.read(b)) != -1) {
					outStream.write(b, 0, len);
				}
				fin.close();
				outStream.flush();
				outStream.close();
			}
			System.out.print("\nupdate ok\n");
			con.commit();
		}

		catch (Exception e) {

			e.printStackTrace();

		}

		con.close();

		long end = System.currentTimeMillis();

		System.out.println(end - start);

	}

}
package com.lyon.hibernate.blob;

import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import com.lyon.hibernate.dao.IPrintDao;
import com.lyon.hibernate.dao.ISupPrintDao;
import com.lyon.hibernate.dao.impl.PrintDaoImpl;
import com.lyon.hibernate.dao.impl.SupPrintDaoImpl;
import com.lyon.hibernate.pojo.Print;
import com.mysql.jdbc.PreparedStatement;

import oracle.sql.BLOB;

/**
 * 
 * 功            能： orcal的blob形式，通过二进制流下载xml文件
 * 时            间：2017年12月28日上午10:48:08
 *@author  
 */
public class getbolb_test1 {

	public void getXml(String policyCode) throws SQLException{
		
			Connection con = null;
			long start = System.currentTimeMillis(); // count runtime
			
			/**
			 * 通过打印单编号查询得到对象，
			 * 把所需要的xml下载到相应的文件夹下
			 * 文件名是查询出来的  如：p.getXmlBlob()
			 * */
			IPrintDao pd=new PrintDaoImpl();
			Print p=pd.getPrintCode(policyCode);
			
			String path = "E:\\eclipsedemo-workspace\\HibernateDemo2\\xml文件\\"+p.getXmlBlob()+"";
			File file = new File(path);
		try {
				con = DBConnection.getDBConnection();
				con.setAutoCommit(false);
				Statement stmt = con.createStatement();
				String hql="select id,word from tab_blob_test where id="+p.getPrinId()+"";
				ResultSet rs = stmt.executeQuery(hql);
				if (rs.next()) {
					BLOB blob = (BLOB) rs.getBlob("word");
					
					/** 通过流将文件写出*/
					FileOutputStream output = new FileOutputStream(file);
					InputStream input = blob.getBinaryStream();// put blob into input
					byte[] buffer = new byte[blob.getBufferSize()];
					int len = 0;
					while ((len = input.read(buffer)) != -1) {
						output.write(buffer, 0, len);
						input.close();
						output.flush();
						output.close();
					}
					System.out.print("\ndownload ok\n");
				}
			}
			catch (Exception e) {
				e.printStackTrace();
			}
			con.close();
			long end = System.currentTimeMillis();
			System.out.println(end - start);
	}
	
}
参考地址：https://www.cnblogs.com/tobecrazy/archive/2012/12/22/2828734.html