Java 向SQL Server插入文件数据

package sqlserver;
import java.util.Date;
import java.util.UUID;

import java.text.SimpleDateFormat;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.sql.*;

public class sqlserver {
static String uuid=null;
//////////////////////////////////////////////////////
public static void main(String[] args) {
FileOutputStream bos = null;
try {
bos = new FileOutputStream("F:/output.txt");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.setOut(new PrintStream(bos));
System.out.println(insertData());
//    getData();    
}

public static Connection MSSQLConnection(){
String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver"; // 加载JDBC驱动
String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=filesdata"; // 连接服务器和数据库test
String userName = "sa"; // 默认用户名
String userPwd = "sa"; // 密码
Connection dbConn = null;
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
Class.forName(driverName);
dbConn = DriverManager.getConnection(dbURL, userName, userPwd);
System.out.println(df.format(new Date())+" "+"数据库连接成功。"); // 如果连接成功
return dbConn;    // 控制台输出Connection
// Successful!
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

// read the file and insert into the video table;
static String insertData() {
int isFilesFound=0;
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date2 = new Date();
Connection dbConn = null;
dbConn=MSSQLConnection();
//UUID uuid = UUID.randomUUID();
String f_id = UUID.randomUUID().toString();//用来生成数据库的主键id非常不错..
uuid=f_id;
File file = new File("F:/工作文件/PSD.rar");
System.out.println(df.format(new Date())+" "+"正在处理文件："+file.getName()+" UUID："+uuid);
FileInputStream fis = null;
try{
fis = new FileInputStream(file);
isFilesFound=1;
} catch(FileNotFoundException e){
System.out.println(df.format(new Date())+" "+"未找到文件。");

}
if(isFilesFound==1){
try {
System.out.println(df.format(new Date())+" "+"开始向数据库写入文件。");
PreparedStatement ps = dbConn.prepareStatement("Insert into files (f_id,f_name,f_content,f_date) values (?,?,?,?)");
ps.setString(1,f_id); 
ps.setString(2,file.getName());
ps.setBinaryStream(3,fis,(int)file.length());
ps.setDate(4,new java.sql.Date(date2.getTime()));

System.out.println(df.format(new Date())+" "+"正在写入..。"); 
ps.executeUpdate(); 
ps.close(); 
try{ 
fis.close(); 
System.out.println(df.format(new Date())+" "+"文件已写入数据表且数据流已关闭。"); 
}catch(IOException e){ 
System.out.println(df.format(new Date())+" "+"数据流无法关闭。"); 
} 
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
try {
dbConn.close();
System.out.println(df.format(new Date())+" "+"关闭数据库连接.");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return df.format(new Date())+" 插入数据完成。"; 
}

// get the data file from database;
static String getData(){
Connection dbcon = null;
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try{
dbcon = MSSQLConnection();
//OutputStream out = new FileOutputStream("d:/1.exe");
Statement st = dbcon.createStatement();
ResultSet rs = st.executeQuery("select * from files where f_id = 'f7453b56-92f2-4aa9-8781-6ca85ab3f0ce'");
while(rs.next()){
java.io.InputStream fi=rs.getBinaryStream("f_content");
File file=new File("d:/1.zip");
FileOutputStream fo = new FileOutputStream(file);
BufferedOutputStream bo = new BufferedOutputStream(fo);
byte[] buff = new byte[1024];
System.out.println(df.format(new Date())+" "+"正在从数据库写入本地...");
while((fi.read(buff))>0)
{
bo.write(buff);
}
System.out.println(df.format(new Date())+" "+"写入完毕.");
bo.close();
fo.close();
fi.close();
System.out.println(df.format(new Date())+" "+"关闭读写流.");
}
}catch(Exception ex){
ex.printStackTrace();
}finally{
if (dbcon!=null){
try{
dbcon.close();
System.out.println(df.format(new Date())+" "+"关闭数据库连接.");
}catch(Exception ex){
ex.printStackTrace();
}
}
dbcon = null;
}
return null;

}
//////////////////////////////////////////////////////
}