转载

文本以及图片的上传

先是javaScript的处理

function dosubmit(){     var th=document.form1;     th.action="<%=path%>/servlet/ProductAction?action_flag=add";     th.submit(); }

新建一个接口来处理上传

package com.servlet.product.service;  import java.util.List;  public interface ProductService {     public boolean addProduct(List<Object> params); }

新建一个类继承接口完成对数据的访问

package com.servlet.product.dao; import java.sql.SQLException; import java.util.List; import com.jdbc.util.MySqlConnect; import com.servlet.product.service.ProductService; public class ProductDao implements ProductService {  MySqlConnect conn;  public ProductDao() {   conn = new MySqlConnect();  }  public boolean addProduct(List<Object> params) {   boolean flag=false;   String sql = "insert into product(proid,proname,proprice,proaddress,proimage) values(?,?,?,?,?) ";   conn.getConnect();   try {    flag=conn.updataByPrepareStatement(sql, params);   } catch (SQLException e) {    e.printStackTrace();   }finally{    conn.releaseConnect();   }   return flag;  } }

还需要使用UUID来给数据添加主键

package com.servlet.product.util; import java.util.UUID; public class UUIDTools {  public UUIDTools() {  }  public static String getUUID() {   UUID uuid = UUID.randomUUID();   System.out.println("uuid  "+uuid.toString());   return uuid.toString().replace("-", "").substring(0, 6);  } }

再新建一个类完成对业务逻辑的处理

这里使用apache的commons.fileupload的jar包来进行文件的上传

package com.servlet.product.action; import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.util.ArrayList; 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.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import com.servlet.product.dao.ProductDao; import com.servlet.product.service.ProductService; import com.servlet.product.util.UUIDTools; public class ProductAction extends HttpServlet { private ProductService service;  public ProductAction() {   super();  }  public void destroy() {   super.destroy();   }  public void doGet(HttpServletRequest request, HttpServletResponse response)    throws ServletException, IOException {   this.doPost(request, response);  }  public void doPost(HttpServletRequest request, HttpServletResponse response)    throws ServletException, IOException {   response.setContentType("text/html;charset=utf-8");   request.setCharacterEncoding("utf-8");   response.setCharacterEncoding("utf-8");   String action_flag = request.getParameter("action_flag");   if (action_flag.equals("add")) {    addProduct(request, response);   }  }  private void addProduct(HttpServletRequest request,    HttpServletResponse response) throws ServletException, IOException {   String path = request.getContextPath();   // 实例化工厂   DiskFileItemFactory factory = new DiskFileItemFactory();   // 创建上传类   ServletFileUpload upload = new ServletFileUpload(factory);
  //设置文件大小
  upload.setFileSizeMax(3*1024*1024);
  //设置总文件大小
  upload.setSizeMax(6*1024*1024);   // 接收返回集   List<FileItem> list = null;   List<Object> params = new ArrayList<Object>();   params.add(UUIDTools.getUUID());   try {    // 解析request请求    list = upload.parseRequest(request);    // 分开文本数据 和 非文本数据    for (FileItem item : list) {     if (item.isFormField()) {      if (item.getFieldName().equals("proname")) {       params.add(item.getString("utf-8"));      }      if (item.getFieldName().equals("proprice")) {       params.add(item.getString("utf-8"));      }      if (item.getFieldName().equals("proaddress")) {       params.add(item.getString("utf-8"));      }     } else {      try {       String imgName = item.getName();       params.add(imgName);       String upload_path = request.getRealPath("/upload");       File file = new File(upload_path +"/"         + imgName);       item.write(file);       boolean flag=service.addProduct(params);       if(flag){        System.out.println("跳转");        response.sendRedirect(path+"/product/2_1_5.jsp");       }      } catch (Exception e) {       e.printStackTrace();      }     }    }   } catch (FileUploadException e) {    e.printStackTrace();   }  }  public void init() throws ServletException {   service=new ProductDao();  } }