这个例子是通过用Struts的FormFile来写入到MySQL中。用户通过选一个图片，然后按submit就可以存入数据库中。
1.首先需要建立一个表:
create table test ( name varchar(20), pic blob ); 在MySQL的test库中 <%@ page language="java"%> <%@ taglib uri= "http://jakarta.apache.org/struts/tags-bean" prefix="bean"%> <%@ taglib uri= "http://jakarta.apache.org/struts/tags-html" prefix="html"%> <html> <head> <title>JSP for multiForm form</title> </head> <body> <html:form action="/multi" enctype="multipart/form-data"> 一定要用enctype=“multipart/form-data“ 不然就提交之后就会有抛出异常 file : <html:file property="file"/> <html:errors property="file"/></br> name : <html:text property="name"/> <html:errors property="name"/></br> <html:submit/><html:cancel/> </html:form> </body> </html>
2. 相对应的ActionForm:
//Created by MyEclipse Struts // XSL source (default): platform:/plugin/com.genuitec.eclipse. cross.easystruts.eclipse_3.8.1 /xslt/JavaClass.xsl package saoo.struts.form; import org.apache.struts.action.ActionForm; import org.apache.struts.upload.FormFile; /** * MyEclipse Struts * Creation date: 08-24-2004 * * XDoclet definition: * @struts:form name="multiForm" */ public class MultiForm extends ActionForm { // ---------------- Instance Variables /** file property */ private FormFile file; /** name property */ private String name; // ----------------- Methods /** * Returns the file. * @return FormFile */ public FormFile getFile() { return file; } /** * Set the file. * @param file The file to set */ public void setFile(FormFile file) { this.file = file; } /** * Returns the name. * @return String */ public String getName() { return name; } /** * Set the name. * @param name The name to set */ public void setName(String name) { this.name = name; } }
3. 对就的Action:
//Created by MyEclipse Struts // XSL source (default): platform:/plugin/com.genuitec.eclipse. cross.easystruts.eclipse_3.8.1 /xslt/JavaClass.xsl package saoo.struts.action; import java.io.FileNotFoundException; import java.io.IOException; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.SQLException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.Action; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.upload.FormFile; import saoo.struts.form.MultiForm; /** * MyEclipse Struts * Creation date: 08-24-2004 * * XDoclet definition: * @struts:action path="/multi" name="multiForm" input="/form/multi.jsp" scope="request" */ public class MultiAction extends Action { // --------------- Instance Variables // --------------- Methods /** * Method execute * @param mapping * @param form * @param request * @param response * @return ActionForward */ public ActionForward execute( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) { MultiForm multiForm = (MultiForm) form; FormFile file = multiForm.getFile(); String name = multiForm.getName(); try { Class.forName ("org.gjt.mm.mysql.Driver"); String url="jdbc:mysql: ///test"; Connection con=DriverManager.getConnection (url,"root","password"); String sql="insert into pic values (?,?)"; PreparedStatement ps =con.prepareStatement(sql); ps.setString(1, name); //加入图片到数据库 ps.setBinaryStream (2,file.getInputStream(), file.getFileSize()); ps.executeUpdate(); ps.close(); con.close(); } catch (SQLException se) { se.printStackTrace(); return mapping.findForward("error"); } catch (ClassNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); return mapping.findForward("error"); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); return mapping.findForward("error"); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return mapping.findForward("error"); } return mapping.findForward("success"); } }
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2011-8-26 9:25:23 |
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