处理大数据对象clob数据和blob数据

直接上下代码：

 package com.learn.jdbc.chap06;

 import java.io.File;
 import java.io.FileInputStream;
 import java.io.InputStream;
 import java.sql.Connection;
 import java.sql.PreparedStatement;

 import com.learn.jdbc.model.Album;
 import com.learn.jdbc.util.DbUtil;

 /**
  * 处理大数据对象clob数据和blob数据--插入
  * @author Administrator
  *
  */
 public class Demo1 {
     private static DbUtil dbUtil=new DbUtil();

     private static int addAlbum(Album ab) throws Exception{
         Connection con = dbUtil.getCon();
         String sql="insert into sp_album_test values (null,?,?,?,?,?)";
         PreparedStatement pstmt = con.prepareStatement(sql);
         pstmt.setString(1, ab.getName());
         pstmt.setInt(2, ab.getUid());
         pstmt.setLong(3, ab.getTime());

         // 大字符数据(clob数据)插入数据库--文本文件
         File content = ab.getContent();
         InputStream inputStream = new FileInputStream(content);
         pstmt.setAsciiStream(4, inputStream, content.length());

         // 二进制数据(blob数据)插入数据库--图片,电影,音乐
         File pic = ab.getPic();
         InputStream inputStream2 = new FileInputStream(pic);
         pstmt.setBinaryStream(5, inputStream2, pic.length());

         int result = pstmt.executeUpdate();
         dbUtil.close(pstmt, con);
         return result;
     }

     public static void main(String[] args) throws Exception {
         File content = new File("e:/code.txt");
         File pic     = new File("e:/Koala111.png");
         Album ab = new Album("张三", 1, System.currentTimeMillis(), content, pic);
         int result = addAlbum(ab);
         if(result>0){
             System.out.println("数据插入成功");
         }else{
             System.out.println("数据插入失败");
         }
     }
 }

 package com.learn.jdbc.chap06;

 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.OutputStream;
 import java.sql.Blob;
 import java.sql.Clob;
 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;

 import com.learn.jdbc.util.DbUtil;

 /**
  * 处理大数据对象clob数据和blob数据--查询
  * @author Administrator
  *
  */
 public class Demo2 {
     private static DbUtil dbUtil=new DbUtil();

     private static void listAlbum(int id) throws Exception{
         Connection con = dbUtil.getCon();
         String sql="select * from sp_album_test where id=?";
         PreparedStatement pstmt = con.prepareStatement(sql);
         pstmt.setInt(1, id);
         ResultSet rs = pstmt.executeQuery();

         if(rs.next()){
             String name = rs.getString("name");
             int uid = rs.getInt("uid");
             long time = rs.getLong("add_time");
             // 读取大字符数据--clob数据
             Clob clob =rs.getClob("content");
             String content = clob.getSubString(1,(int) clob.length());

             // 读取二进制数据--blob数据
             Blob blob = rs.getBlob("pic");
             OutputStream out = new FileOutputStream(new File("e:/kaola.png"));
             out.write(blob.getBytes(1, (int) blob.length()));
             out.close();

             System.out.println("名字："+name);
             System.out.println("uid: "+uid);
             System.out.println("时间: "+time);
             System.out.println("内容: "+content);

         }

     }

     public static void main(String[] args) throws Exception {
         listAlbum(1);
     }
 }