关于集成第三方office的sdk产品,采用servlet方式将数据库表BLOB字段文件下载与二进制文件上传到blob

一般的office的厂家会提供多种产品的集成方式，这里介绍的是使用js集成office插件；作为一个入职3个月的小白，碰巧公司让我研究一下这个第三方产品，主要完成数据库表bolb文件下载与使用该office文件修改后的上传，本人在此把这些分享给大家，不足之处大家包涵！！！

1.这个便是厂家提供的js方法

    
    
    


安卓/苹果 DeepLinks(URL Schemas) 适用
新建word文档
打开服务器word文档
打开服务器pdf文档

其实主要就是2个方法，一个就是关于创建新的文档，一个是打开一个已经存在文档；

 主要就是这两个属性：word.downloadURL与word.uploadURL 

word.downloadURL是一个下载文件的url;word.downloadURL则是负责文件上传url;实现这两个url的上传下载；

2.由于对.net项目不了解(本人刚学习java啊...），所以只好采用servlet的方式将数据库BLOB的文件进行下载，将二进制格式的文件传入数据库blob格式的字段（通过world.download下载的文件，厂家会提供一个字段来获取二进制文件，此处字段为“fileUpload”）

package Servlet;

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import java.util.Properties;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
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.FileItemFactory;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

/**
 * Servlet implementation class UpServlet
 */
public class FileServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	/**
	 * @see HttpServlet#HttpServlet()
	 */
	public FileServlet() {
		super();
		// TODO Auto-generated constructor stub
	}

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		String filename = request.getParameter("filename");// 下载的文件名
		String flag = request.getParameter("flag");// 区分上传下载参数
		String tName = request.getParameter("tName");// 操作的表名
		String DM_CODE = request.getParameter("DM_CODE");// 表的主键
		String clumName = request.getParameter("clumName");// blob数据的列名
		if (flag.equalsIgnoreCase("UP")) {
			upfile(request, response, tName, DM_CODE, clumName, filename);
		}
		if (flag.equalsIgnoreCase("DOWN")) {
			downfile(request, response, tName, DM_CODE, clumName, filename);
		}
		if (flag.equalsIgnoreCase("UPDATE")) {
			updateFile(request, response, tName, DM_CODE, clumName);
		}
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

	public void updateFile(HttpServletRequest request, HttpServletResponse response, String tName, String DM_CODE,
			String clumName) throws ServletException, IOException {
		InputStream in = null;
		Connection conn = null;
		InputStream indata = null;
		PreparedStatement pst = null;
		try {
			// 解析http请求
			boolean isMultipart = ServletFileUpload.isMultipartContent(request);
			// 解析成功
			if (isMultipart == true) {
				// 获得磁盘文件条目工厂
				FileItemFactory factory = new DiskFileItemFactory();
				// 高水平的API文件上传处理，将文件保存在服务器硬盘
				ServletFileUpload upload = new ServletFileUpload(factory);
				// 设置上传的单个文件的大小100M
				upload.setSizeMax(100 * 1024 * 1024);
				// 设置上传的总文件的大小100M
				upload.setFileSizeMax(100 * 1024 * 1024);
				List fileItemList = upload.parseRequest(request);
				// 如果表单内容不为空
				if (fileItemList != null) {
					// 遍历请求内容
					for (FileItem fileItem : fileItemList) {
						if (fileItem.getFieldName().equalsIgnoreCase("fileUpload")) {
							in = fileItem.getInputStream();
							byte[] buffer = new byte[in.available()];
							indata = getServletContext().getResourceAsStream("/WEB-INF/datebase.properties");
							Properties props = new Properties();
							try {
								props.load(indata);
							} catch (IOException e) {
								e.printStackTrace();
								return;
							}
							String driver = props.getProperty("db.driver");
							String URL = props.getProperty("db.url");
							String USER = props.getProperty("db.username");
							String PASSWORD = props.getProperty("db.password");
							// 1.加载驱动程序
							Class.forName(driver);
							// 2.获得数据库链接
							conn = DriverManager.getConnection(URL, USER, PASSWORD);
							// 3.通过数据库的连接操作数据库，实现增删改查（使用Statement类）
							String s = "update " + tName + " set " + clumName + "=? where DM_CODE=" + DM_CODE;
							pst = conn.prepareStatement(s);
							pst.setBinaryStream(1, in, buffer.length);
							pst.execute();
							fileItem.delete();
						}
					}
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if(indata!=null){
				indata.close();}
				if(pst!=null){
				pst.close();}
				if(conn!=null){
				conn.close();}
				if(in!=null){
				in.close();}
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	protected void downfile(HttpServletRequest request, HttpServletResponse response, String tName, String DM_CODE,
			String clumName, String filename) throws ServletException, IOException {
		InputStream indata = null;
		Connection conn = null;
		PreparedStatement pst = null;
		ServletOutputStream out = null;
		InputStream ins = null;
		try {
			out = response.getOutputStream();
			response.reset();
			
			response.setContentType("application/msword;charset=GBK");
			indata = getServletContext().getResourceAsStream("/WEB-INF/datebase.properties");
			Properties props = new Properties();
			try {
				props.load(indata);
			} catch (IOException e) {
				e.printStackTrace();
				return;
			}
			String driver = props.getProperty("db.driver");
			String URL = props.getProperty("db.url");
			String USER = props.getProperty("db.username");
			String PASSWORD = props.getProperty("db.password");
			// 1.加载驱动程序
			Class.forName(driver);
			// 2.获得数据库链接
			conn = DriverManager.getConnection(URL, USER, PASSWORD);
			// 3.通过数据库的连接操作数据库，实现增删改查（使用Statement类）
			if (tName.equals("RD_FILE")) {
				String sql = "select " + clumName + ",FILENAME from " + tName + " where DM_CODE=" + DM_CODE + "";
				pst = conn.prepareStatement(sql);
				ResultSet rs = pst.executeQuery();
				if (rs.next()) {
					java.sql.Blob blob = rs.getBlob(clumName);
					ins = blob.getBinaryStream();
					String fname=rs.getString("FILENAME");
					response.setHeader("Content-Disposition", "attachement;filename=" + fname + ";");
					// 下面将BLOB数据写入文件
					byte[] b = new byte[1024];
					int len = 0;
					while ((len = ins.read(b)) != -1) {
						out.write(b, 0, len);
					}
				}
			} else {
				String sql = "select " + clumName + " from " + tName + " where DM_CODE=" + DM_CODE + "";
				pst = conn.prepareStatement(sql);
				ResultSet rs = pst.executeQuery();
				if (rs.next()) {
					java.sql.Blob blob = rs.getBlob(clumName);
					ins = blob.getBinaryStream();
					response.setHeader("Content-Disposition", "attachement;filename=" + filename + ";");
					// 下面将BLOB数据写入文件
					byte[] b = new byte[1024];
					int len = 0;
					while ((len = ins.read(b)) != -1) {
						out.write(b, 0, len);
					}
				}
			}
		} catch (Exception e) {

			e.printStackTrace();

		} finally {
			indata.close();
			ins.close();
			out.flush();
			out.close();
			try {
				pst.close();
				conn.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	public void upfile(HttpServletRequest request, HttpServletResponse response, String tName, String DM_CODE,
			String clumName, String filename) throws ServletException, IOException {
		InputStream in = null;
		Connection conn = null;
		InputStream indata = null;
		PreparedStatement pst = null;
		try {
			// 解析http请求
			boolean isMultipart = ServletFileUpload.isMultipartContent(request);
			// 解析成功
			if (isMultipart == true) {
				// 获得磁盘文件条目工厂
				FileItemFactory factory = new DiskFileItemFactory();
				// 高水平的API文件上传处理，将文件保存在服务器硬盘
				ServletFileUpload upload = new ServletFileUpload(factory);
				// 设置上传的单个文件的大小100M
				upload.setSizeMax(100 * 1024 * 1024);
				// 设置上传的总文件的大小100M
				upload.setFileSizeMax(100 * 1024 * 1024);				
				List fileItemList = upload.parseRequest(request);				
				if (fileItemList != null) {
					// 遍历请求内容
					for (FileItem fileItem : fileItemList) {
						if (fileItem.getFieldName().equalsIgnoreCase("fileUpload")) {
							in = fileItem.getInputStream();
							byte[] buffer = new byte[in.available()];
							indata = getServletContext().getResourceAsStream("/WEB-INF/datebase.properties");
							Properties props = new Properties();
							try {
								props.load(indata);
							} catch (IOException e) {
								e.printStackTrace();
								return;
							}
							String driver = props.getProperty("db.driver");
							String URL = props.getProperty("db.url");
							String USER = props.getProperty("db.username");
							String PASSWORD = props.getProperty("db.password");
							// 1.加载驱动程序
							Class.forName(driver);
							// 2.获得数据库链接
							conn = DriverManager.getConnection(URL, USER, PASSWORD);
							// 3.通过数据库的连接操作数据库，实现增删改查（使用Statement类）
							// 如果操作的表为RD_FILE，则需修改sql
							String s;
							if (tName.equals("RD_FILE")) {
								String filetype = filename.split("\\.")[1];
								s = "insert into " + tName + "(DM_CODE," + clumName + ",RD_TYPE,FILENAME) values('"
										+ DM_CODE + "',?,'" + filetype + "','" + filename + "')";
							} else {
								s = "insert into " + tName + "(DM_CODE," + clumName + ") values(" + DM_CODE + ",?)";
							}
							pst = conn.prepareStatement(s);
							pst.setBinaryStream(1, in, buffer.length);
							pst.execute();
							fileItem.delete();
						}
					}
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				indata.close();
				pst.close();
				conn.close();
				in.close();
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
}

3.配置servlet把2个访问地址传入相应url即可；