Question

我正在将照片上传到oracle数据库。我的AddPhotoServlet类的代码如下。

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class AddPhotoServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();
    try {
        // Apache Commons-Fileupload library classes
        DiskFileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload sfu  = new ServletFileUpload(factory);

        /*if (! ServletFileUpload.isMultipartContent(request)) {
            System.out.println("sorry. No file uploaded");
            return;
        }*/

        // parse request
        List items = sfu.parseRequest(request);
        FileItem  id = (FileItem) items.get(0);
        String photoid =  id.getString();

        FileItem title = (FileItem) items.get(1);
        String   phototitle =  title.getString();

        // get uploaded file
        FileItem file = (FileItem) items.get(2);

        // Connect to Oracle
        Class.forName("oracle.jdbc.driver.OracleDriver");
        Connection con =DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe", "cloud", "cloud");
        con.setAutoCommit(false);

        PreparedStatement ps = con.prepareStatement("insert into photos values(?,?,?)");
        ps.setString(1, photoid);
        ps.setString(2, phototitle);
        // size must be converted to int otherwise it results in error
        ps.setBinaryStream(3, file.getInputStream(), (int) file.getSize());
        ps.executeUpdate();
        con.commit();
        con.close();
        out.println("Proto Added Successfully. <p> <a href='listphotos'>List Photos </a>");
    }

当我在上传时在服务器中运行html页面时会抛出错误： ORA-01460：请求未实现或不合理的转换。有人可以帮我这个吗？

我创建了我的表格：

create table photos
(
id number(5) primary key,
title varchar2(50),
photo blob
);

Answer 1

查看oracle jdbc开发人员使用streams和lobs的指南。关于如何处理具有不同性能/内存含义的数据有很多选择。第二个doc（on lobs）的一部分通过使用Connection.createBlob()并将内容写入该对象然后在语句中设置该blob对象来涵盖临时lob对象的使用。

如何解决ORA-01460错误？

1 个答案: