用jspsmartupload进行上传下载
这是进行上传
import java.sql.*;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import com.jspsmart.upload.*;
public class UpLoad extends HttpServlet {
private ServletConfig config;
/**
* Init the servlet
*/
final public void init(ServletConfig config) throws ServletException {
this.config = config;
}
final public ServletConfig getServletConfig() {
return config;
}
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("============UpLoad begin ddd=============");
String id = null;
SmartUpload mySmartUpload = new SmartUpload();
PrintWriter out = response.getWriter();
java.io.File file=null;
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
} catch (java.lang.ClassNotFoundException e) {
System.err.print("ClassNotFoundException: " + e.getMessage());
}
try {
//Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@10.216.0.2:1521:ORCL", "test", "test");
conn.setAutoCommit(false); //设置手动提交，以提高性能。
Statement stmt = conn.createStatement();
// Initialization
mySmartUpload.initialize(config, request, response);
mySmartUpload.setMaxFileSize(500 * 1024);
// Upload
mySmartUpload.upload();
//取得text框中的数据
id = mySmartUpload.getRequest().getParameter("id");
//取得文件和文件名
com.jspsmart.upload.File myFile = mySmartUpload.getFiles().getFile(0);
String fileName = myFile.getFileName();
if (!myFile.isMissing()) {
//save data
myFile.saveAs(fileName, mySmartUpload.SAVE_PHYSICAL);
System.out.println("============fileName=" + fileName + "====");
file = new java.io.File(fileName);
java.io.InputStream inStream = new java.io.FileInputStream(file);
int fileSize = myFile.getSize();
byte[] bytes = new byte[fileSize];
System.out.println("============fileSize=" + fileSize + "====");
//将数据插入到表中
String strSql = "insert into test(id,name,content) values('" + id + "','" + fileName + "',empty_blob())";
stmt.execute(strSql);
ResultSet rs = stmt.executeQuery("select content from zyw_test where id='" + id + "' for update ");
if (rs.next()) {
oracle.sql.BLOB blob = ( (oracle.jdbc.OracleResultSet) rs).getBLOB("content");
OutputStream outStream = blob.getBinaryOutputStream();
inStream.read(bytes);
outStream.write(bytes);
outStream.flush();
stmt.execute("commit");
outStream.close();
}
inStream.close();
stmt.close();
if(file!=null)//删除文件
file.delete();
out.println("upload sucess");
} else {
out.println("no file");
}
} catch (Exception ex) {
if(file!=null)
file.delete();
out.println("upload fail");
ex.printStackTrace();
}
System.out.println("============UpLoad end=============");
}
}
这是下载，进行显示图片
import java.sql.*;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class DownLoad extends HttpServlet{
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request,response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("======DownLoad begin=====");
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@10.216.0.2:1521:ORCL","test","test");
Statement stmt=conn.createStatement();
String id=request.getParameter("id");
String sql="SELECT id, name, content FROM test where id='"+id+"'";
ResultSet rs=stmt.executeQuery(sql);
if(rs.next()){
Blob blob = rs.getBlob("content");
byte[] ab = blob.getBytes(1, (int)blob.length());
response.setContentType("image/jpeg");
ServletOutputStream op = response.getOutputStream();
op.write(ab);
op.flush();
op.close();
}
}catch(Exception ex){
ex.printStackTrace();
}
System.out.println("======DownLoad end=====");
}
}