java学习笔记 (8) —— Struts2 实现上传
1、新建upload.jsp
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <s:form action="upload" theme="simple" method="post" namespace="" enctype="multipart/form-data"> <table align="center" width="40%" border="1"> <tr> <td> username </td> <td> <s:textfield name="username" ></s:textfield> </td> </tr> <tr> <td> password </td> <td> <s:textfield name="password" ></s:textfield> </td> </tr> <tr> <td> file </td> <td> <s:file name="file"></s:file> </td> </tr> <tr> <td> <s:submit value=" submit "></s:submit> </td> <td> <s:reset value=" reset "></s:reset> </td> </tr> </table> </s:form> </body> </html>
2、新建uploadResult.jsp
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'uploadResult.jsp' starting page</title> </head> <body> username:<s:property value="username"></s:property> password:<s:property value="password"></s:property> file:<s:property value="fileFileName"></s:property> </body> </html>
3、新建UploadAction.java
package com.test.action; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class UploadAction extends ActionSupport { private static final long serialVersionUID = 1L; private String username; private String password; //必须添加的三个属性
//file private File file; //fileFileName private String fileFileName; //fileContentType private String fileContentType; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public File getFile() { return file; } public void setFile(File file) { this.file = file; } public String getFileFileName() { return fileFileName; } public void setFileFileName(String fileFileName) { this.fileFileName = fileFileName; } public String getFileContentType() { return fileContentType; } public void setFileContentType(String fileContentType) { this.fileContentType = fileContentType; } public String execute() throws Exception { InputStream is = new FileInputStream(file); String root = ServletActionContext.getServletContext().getRealPath("/upload"); File destFile = new File(root,this.getFileFileName()); OutputStream os = new FileOutputStream(destFile); //字节数组 byte[] buffer = new byte[400]; int length = 0; while ((length = is.read(buffer))>0) { os.write(buffer); } is.close(); os.close(); return SUCCESS; } }
4、struts.xml
<action name="upload" class="com.test.action.UploadAction"> <result name="success">/uploadResult.jsp</result> </action>
多文件上传：
1、upload.jsp
<body> <s:form action="upload" theme="simple" method="post" namespace="" enctype="multipart/form-data"> <table align="center" width="40%" border="1"> <tr> <td> username </td> <td> <s:textfield name="username" ></s:textfield> </td> </tr> <tr> <td> password </td> <td> <s:textfield name="password" ></s:textfield> </td> </tr> <tr> <td> file1 </td> <td> <s:file name="file"></s:file> </td> </tr> <tr> <td> file2 </td> <td> <s:file name="file"></s:file> </td> </tr> <tr> <td> file3 </td> <td> <s:file name="file"></s:file> </td> </tr> <tr> <td> <s:submit value=" submit "></s:submit> </td> <td> <s:reset value=" reset "></s:reset> </td> </tr> </table> </s:form> </body>
2、uploadResult.jsp
<body> username:<s:property value="username"></s:property> password:<s:property value="password"></s:property> file:<s:property value="fileFileName"></s:property> </body>
3、uploadAction.jsp
package com.test.action; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.util.List; import javax.swing.ListModel; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class UploadAction extends ActionSupport { private static final long serialVersionUID = 1L; private String username; private String password; private List<File> file; private List<String> fileFileName; private List<String> fileContentType; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public List<File> getFile() { return file; } public void setFile(List<File> file) { this.file = file; } public List<String> getFileFileName() { return fileFileName; } public void setFileFileName(List<String> fileFileName) { this.fileFileName = fileFileName; } public List<String> getFileContentType() { return fileContentType; } public void setFileContentType(List<String> fileContentType) { this.fileContentType = fileContentType; } public String execute() throws Exception { for (int i = 0; i < file.size(); i++) { InputStream is = new FileInputStream(file.get(i)); String root = ServletActionContext.getServletContext().getRealPath("/upload"); File destFile = new File(root,this.getFileFileName().get(i)); OutputStream os = new FileOutputStream(destFile); //字节数组 byte[] buffer = new byte[400]; int length = 0; while ((length = is.read(buffer))>0) { os.write(buffer); } is.close(); os.close(); } return SUCCESS; } }
