实例介绍
【实例简介】通过数据库的存储数据,用到了 Sql-Server-2_fat.jar
【实例截图】
【实例截图】
【核心代码】
package eyou.dt;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.*;
import java.util.Properties;
public class DBUtils {
private PreparedStatement p;
private String spring;
private String Type;
private String summer;
private String fall;
private String winter;
private static ResultSet rs;
private static FileInputStream stat;
private static Object conn;
private static Object P;
static final String DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
private static String url;
private static String user;
private static String pwd;
public static Connection getConnection() {
Connection con = null;
try {
Class.forName(DRIVER);
Properties property = new Properties();
try {
property.load(new FileInputStream("message.properties"));
url = property.getProperty("url");
user = property.getProperty("user");
pwd = property.getProperty("pwd");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
con = DriverManager.getConnection(url, user, pwd);
} catch (ClassNotFoundException e) {
System.out.println("连接失败");
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return con;
}
// ����
public static void close(Connection conn) {
if (conn != null) {// �����ָ���쳣
try {
conn.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) {
DBUtils d=new DBUtils();
try {
d.findByFall();
d.findBySpring();
d.findBySummer();
d.findByWinter();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 在读取出来
*
* @return
* @throws IOException
*/
public boolean findBySpring() throws IOException {// SELECT
// IssueUserNo,Pic
Boolean picType = false; // FROM
// T_BgGraph
// where PicID=1 /eyou/ui/image/
String sql = "select Top 1 * from T_BgGraph WHERE TYPE=0 AND ImageShow=1 order by UpdTime desc";
Connection conn = null;
conn = DBUtils.getConnection();
try {
p = conn.prepareStatement(sql);
rs = p.executeQuery();
//根据路径来 实现图片
Properties property = new Properties();
try {
property.load(new FileInputStream("message.properties"));
spring = property.getProperty("Spring");
Type=property.getProperty("PicType");
} catch (IOException e) {
e.printStackTrace();
}
while (rs.next()) {
FileOutputStream newFile = new FileOutputStream("D:/java/EYouDemo/src/eyou/ui/image/" spring Type);
Filte(newFile);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtils.closeCon();
}
return picType;
}
public boolean findBySummer() throws IOException {// SELECT
// IssueUserNo,Pic
Boolean picType = false; // FROM
// T_BgGraph
// where PicID=1 /eyou/ui/image/
String sql = "select Top 1 * from T_BgGraph WHERE TYPE=0 AND ImageShow=2 order by UpdTime desc";
Connection conn = null;
conn = DBUtils.getConnection();
try {
p = conn.prepareStatement(sql);
rs = p.executeQuery();
//根据路径来 实现图片
Properties property = new Properties();
try {
property.load(new FileInputStream("message.properties"));
summer = property.getProperty("summer");
Type=property.getProperty("PicType");
} catch (IOException e) {
e.printStackTrace();
}
while (rs.next()) {
FileOutputStream newFile = new FileOutputStream("D:/java/EYouDemo/src/eyou/ui/image/" summer Type);
Filte(newFile);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtils.closeCon();
}
return picType;
}
public boolean findByFall() throws IOException {// SELECT
// IssueUserNo,Pic
Boolean picType = false; // FROM
// T_BgGraph
// where PicID=1 /eyou/ui/image/
String sql = "select Top 1 * from T_BgGraph WHERE TYPE=0 AND ImageShow=3 order by UpdTime desc";
Connection conn = null;
conn = DBUtils.getConnection();
try {
p = conn.prepareStatement(sql);
rs = p.executeQuery();
//根据路径来 实现图片
Properties property = new Properties();
try {
property.load(new FileInputStream("message.properties"));
fall = property.getProperty("fall");
Type=property.getProperty("PicType");
} catch (IOException e) {
e.printStackTrace();
}
while (rs.next()) {
FileOutputStream newFile = new FileOutputStream("D:/java/EYouDemo/src/eyou/ui/image/" fall Type);
Filte(newFile);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtils.closeCon();
}
return picType;
}
public boolean findByWinter() throws IOException {// SELECT
// IssueUserNo,Pic
Boolean picType = false; // FROM
// T_BgGraph
// where PicID=1 /eyou/ui/image/
String sql = "select Top 1 * from T_BgGraph WHERE TYPE=0 AND ImageShow=4 order by UpdTime desc";
Connection conn = null;
conn = DBUtils.getConnection();
try {
p = conn.prepareStatement(sql);
rs = p.executeQuery();
//根据路径来 实现图片
Properties property = new Properties();
try {
property.load(new FileInputStream("message.properties"));
winter = property.getProperty("winter");
Type=property.getProperty("PicType");
} catch (IOException e) {
e.printStackTrace();
}
while (rs.next()) {
FileOutputStream newFile = new FileOutputStream("D:/java/EYouDemo/src/eyou/ui/image/" winter Type);
Filte(newFile);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBUtils.closeCon();
}
return picType;
}
//封装读取的方法
public void Filte(FileOutputStream newFile) throws SQLException,
IOException {
InputStream image = rs.getBinaryStream("Pic"); // 读取
String len = image.toString();
long length = len.length();
byte[] buffer = new byte[(int) length / 7]; // 定义
// buffer为缓冲区每次读取内容的长度
try {
// 将文件写进去
int readSize;
while ((readSize = image.read(buffer)) != -1) {
newFile.write(buffer, 0, readSize);
}
} catch (Exception e) {
// TODO: handle exception
} finally {
image.close();
newFile.close();
}
}
public static void closeCon() throws IOException { // 关闭的方法
try {
if (rs != null) {
rs.close();
rs = null;
}
if (P != null) {
((FileInputStream) P).close();
P = null;
}
if (conn != null) {
((FileInputStream) conn).close();
conn = null;
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
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