实现原理
Struts 2是通过Commons FileUpload文件上传。Commons FileUpload通过将HTTP的数据保存到临时文件夹,然后Struts使用fileUpload拦截器将文件绑定到Action的实例中。从而我们就能够以本地文件方式的操作浏览器上传的文件。
FileUpload.jsp
<% @ page language = " java " contentType = " text/html; charset=utf-8 " pageEncoding = " utf-8 " %> <% @ taglib prefix = " s " uri = " /struts-tags " %> <! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > < html xmlns ="http://www.w3.org/1999/xhtml" > < head > < title > Struts 2 File Upload </ title > </ head > < body > < s:form action ="fileUpload" method ="POST" enctype ="multipart/form-data" > < s:file name ="myFile" label ="Image File" /> < s:textfield name ="caption" label ="Caption" /> < s:submit /> </ s:form > </ body > </ html > 在FileUpload.jsp中,先将表单的提交方式设为POST,然后将enctype设为multipart/form-data,这并没有什么特别之处。接下来,<s:file/>标志将文件上传控件绑定到Action的myFile属性。 FileUploadAction.java package tutorial; import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.util.Date;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class FileUploadAction extends ActionSupport { private static final long serialVersionUID = 572146812454l ; private static final int BUFFER_SIZE = 16 * 1024 ; private File myFile; private String contentType; private String fileName; private String imageFileName; private String caption; public void setMyFileContentType(String contentType) { this .contentType = contentType; } public void setMyFileFileName(String fileName) { this .fileName = fileName; } public void setMyFile(File myFile) { this .myFile = myFile; } public String getImageFileName() { return imageFileName; } public String getCaption() { return caption; } public void setCaption(String caption) { this .caption = caption; } private static void copy(File src, File dst) { try { InputStream in = null ; OutputStream out = null ; try { in = new BufferedInputStream( new FileInputStream(src), BUFFER_SIZE); out = new BufferedOutputStream( new FileOutputStream(dst), BUFFER_SIZE); byte [] buffer = new byte [BUFFER_SIZE]; while (in.read(buffer) > 0 ) { out.write(buffer); } } finally { if ( null != in) { in.close(); } if ( null != out) { out.close(); } } } catch (Exception e) { e.printStackTrace(); } } private static String getExtention(String fileName) { int pos = fileName.lastIndexOf( " . " ); return fileName.substring(pos); } @Override public String execute() { imageFileName = new Date().getTime() + getExtention(fileName); File imageFile = new File(ServletActionContext.getServletContext().getRealPath( " /UploadImages " ) + " / " + imageFileName); copy(myFile, imageFile); return SUCCESS; } ; color 分享到: download.js | UserTest 2009-11-12 01:25 浏览 750 评论(1) 查看更多 评论 1 楼 yuing 2010-09-21 [img][/img] 发表评论 您还没有登录,请您登录后再发表评论
<% @ page language = " java " contentType = " text/html; charset=utf-8 " pageEncoding = " utf-8 " %> <% @ taglib prefix = " s " uri = " /struts-tags " %> <! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" > < html xmlns ="http://www.w3.org/1999/xhtml" > < head > < title > Struts 2 File Upload </ title > </ head >
< body > < s:form action ="fileUpload" method ="POST" enctype ="multipart/form-data" > < s:file name ="myFile" label ="Image File" /> < s:textfield name ="caption" label ="Caption" /> < s:submit /> </ s:form > </ body > </ html > 在FileUpload.jsp中,先将表单的提交方式设为POST,然后将enctype设为multipart/form-data,这并没有什么特别之处。接下来,<s:file/>标志将文件上传控件绑定到Action的myFile属性。 FileUploadAction.java package tutorial; import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.util.Date;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class FileUploadAction extends ActionSupport { private static final long serialVersionUID = 572146812454l ; private static final int BUFFER_SIZE = 16 * 1024 ; private File myFile; private String contentType; private String fileName; private String imageFileName; private String caption; public void setMyFileContentType(String contentType) { this .contentType = contentType; } public void setMyFileFileName(String fileName) { this .fileName = fileName; } public void setMyFile(File myFile) { this .myFile = myFile; } public String getImageFileName() { return imageFileName; } public String getCaption() { return caption; } public void setCaption(String caption) { this .caption = caption; } private static void copy(File src, File dst) { try { InputStream in = null ; OutputStream out = null ; try { in = new BufferedInputStream( new FileInputStream(src), BUFFER_SIZE); out = new BufferedOutputStream( new FileOutputStream(dst), BUFFER_SIZE); byte [] buffer = new byte [BUFFER_SIZE]; while (in.read(buffer) > 0 ) { out.write(buffer); } } finally { if ( null != in) { in.close(); } if ( null != out) { out.close(); } } } catch (Exception e) { e.printStackTrace(); } } private static String getExtention(String fileName) { int pos = fileName.lastIndexOf( " . " ); return fileName.substring(pos); } @Override public String execute() { imageFileName = new Date().getTime() + getExtention(fileName); File imageFile = new File(ServletActionContext.getServletContext().getRealPath( " /UploadImages " ) + " / " + imageFileName); copy(myFile, imageFile); return SUCCESS; } ; color 分享到: download.js | UserTest 2009-11-12 01:25 浏览 750 评论(1) 查看更多 评论 1 楼 yuing 2010-09-21 [img][/img] 发表评论 您还没有登录,请您登录后再发表评论
< body > < s:form action ="fileUpload" method ="POST" enctype ="multipart/form-data" > < s:file name ="myFile" label ="Image File" /> < s:textfield name ="caption" label ="Caption" /> < s:submit /> </ s:form > </ body > </ html >
在FileUpload.jsp中,先将表单的提交方式设为POST,然后将enctype设为multipart/form-data,这并没有什么特别之处。接下来,<s:file/>标志将文件上传控件绑定到Action的myFile属性。 FileUploadAction.java package tutorial; import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.util.Date;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class FileUploadAction extends ActionSupport { private static final long serialVersionUID = 572146812454l ; private static final int BUFFER_SIZE = 16 * 1024 ; private File myFile; private String contentType; private String fileName; private String imageFileName; private String caption; public void setMyFileContentType(String contentType) { this .contentType = contentType; } public void setMyFileFileName(String fileName) { this .fileName = fileName; } public void setMyFile(File myFile) { this .myFile = myFile; } public String getImageFileName() { return imageFileName; } public String getCaption() { return caption; } public void setCaption(String caption) { this .caption = caption; } private static void copy(File src, File dst) { try { InputStream in = null ; OutputStream out = null ; try { in = new BufferedInputStream( new FileInputStream(src), BUFFER_SIZE); out = new BufferedOutputStream( new FileOutputStream(dst), BUFFER_SIZE); byte [] buffer = new byte [BUFFER_SIZE]; while (in.read(buffer) > 0 ) { out.write(buffer); } } finally { if ( null != in) { in.close(); } if ( null != out) { out.close(); } } } catch (Exception e) { e.printStackTrace(); } } private static String getExtention(String fileName) { int pos = fileName.lastIndexOf( " . " ); return fileName.substring(pos); } @Override public String execute() { imageFileName = new Date().getTime() + getExtention(fileName); File imageFile = new File(ServletActionContext.getServletContext().getRealPath( " /UploadImages " ) + " / " + imageFileName); copy(myFile, imageFile); return SUCCESS; } ; color 分享到: download.js | UserTest 2009-11-12 01:25 浏览 750 评论(1) 查看更多 评论 1 楼 yuing 2010-09-21 [img][/img] 发表评论 您还没有登录,请您登录后再发表评论
在FileUpload.jsp中,先将表单的提交方式设为POST,然后将enctype设为multipart/form-data,这并没有什么特别之处。接下来,<s:file/>标志将文件上传控件绑定到Action的myFile属性。
FileUploadAction.java package tutorial; import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.util.Date;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class FileUploadAction extends ActionSupport { private static final long serialVersionUID = 572146812454l ; private static final int BUFFER_SIZE = 16 * 1024 ; private File myFile; private String contentType; private String fileName; private String imageFileName; private String caption; public void setMyFileContentType(String contentType) { this .contentType = contentType; } public void setMyFileFileName(String fileName) { this .fileName = fileName; } public void setMyFile(File myFile) { this .myFile = myFile; } public String getImageFileName() { return imageFileName; } public String getCaption() { return caption; } public void setCaption(String caption) { this .caption = caption; } private static void copy(File src, File dst) { try { InputStream in = null ; OutputStream out = null ; try { in = new BufferedInputStream( new FileInputStream(src), BUFFER_SIZE); out = new BufferedOutputStream( new FileOutputStream(dst), BUFFER_SIZE); byte [] buffer = new byte [BUFFER_SIZE]; while (in.read(buffer) > 0 ) { out.write(buffer); } } finally { if ( null != in) { in.close(); } if ( null != out) { out.close(); } } } catch (Exception e) { e.printStackTrace(); } } private static String getExtention(String fileName) { int pos = fileName.lastIndexOf( " . " ); return fileName.substring(pos); } @Override public String execute() { imageFileName = new Date().getTime() + getExtention(fileName); File imageFile = new File(ServletActionContext.getServletContext().getRealPath( " /UploadImages " ) + " / " + imageFileName); copy(myFile, imageFile); return SUCCESS; } ; color 分享到: download.js | UserTest 2009-11-12 01:25 浏览 750 评论(1) 查看更多 评论 1 楼 yuing 2010-09-21 [img][/img] 发表评论 您还没有登录,请您登录后再发表评论
FileUploadAction.java
package tutorial; import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.util.Date;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class FileUploadAction extends ActionSupport { private static final long serialVersionUID = 572146812454l ; private static final int BUFFER_SIZE = 16 * 1024 ; private File myFile; private String contentType; private String fileName; private String imageFileName; private String caption; public void setMyFileContentType(String contentType) { this .contentType = contentType; } public void setMyFileFileName(String fileName) { this .fileName = fileName; } public void setMyFile(File myFile) { this .myFile = myFile; } public String getImageFileName() { return imageFileName; } public String getCaption() { return caption; } public void setCaption(String caption) { this .caption = caption; } private static void copy(File src, File dst) { try { InputStream in = null ; OutputStream out = null ; try { in = new BufferedInputStream( new FileInputStream(src), BUFFER_SIZE); out = new BufferedOutputStream( new FileOutputStream(dst), BUFFER_SIZE); byte [] buffer = new byte [BUFFER_SIZE]; while (in.read(buffer) > 0 ) { out.write(buffer); } } finally { if ( null != in) { in.close(); } if ( null != out) { out.close(); } } } catch (Exception e) { e.printStackTrace(); } } private static String getExtention(String fileName) { int pos = fileName.lastIndexOf( " . " ); return fileName.substring(pos); } @Override public String execute() { imageFileName = new Date().getTime() + getExtention(fileName); File imageFile = new File(ServletActionContext.getServletContext().getRealPath( " /UploadImages " ) + " / " + imageFileName); copy(myFile, imageFile); return SUCCESS; } ; color 分享到: download.js | UserTest 2009-11-12 01:25 浏览 750 评论(1) 查看更多 评论 1 楼 yuing 2010-09-21 [img][/img] 发表评论 您还没有登录,请您登录后再发表评论
package tutorial;
import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.InputStream;import java.io.OutputStream;import java.util.Date;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;public class FileUploadAction extends ActionSupport { private static final long serialVersionUID = 572146812454l ; private static final int BUFFER_SIZE = 16 * 1024 ; private File myFile; private String contentType; private String fileName; private String imageFileName; private String caption; public void setMyFileContentType(String contentType) { this .contentType = contentType; } public void setMyFileFileName(String fileName) { this .fileName = fileName; } public void setMyFile(File myFile) { this .myFile = myFile; } public String getImageFileName() { return imageFileName; } public String getCaption() { return caption; } public void setCaption(String caption) { this .caption = caption; } private static void copy(File src, File dst) { try { InputStream in = null ; OutputStream out = null ; try { in = new BufferedInputStream( new FileInputStream(src), BUFFER_SIZE); out = new BufferedOutputStream( new FileOutputStream(dst), BUFFER_SIZE); byte [] buffer = new byte [BUFFER_SIZE]; while (in.read(buffer) > 0 ) { out.write(buffer); } } finally { if ( null != in) { in.close(); } if ( null != out) { out.close(); } } } catch (Exception e) { e.printStackTrace(); } } private static String getExtention(String fileName) { int pos = fileName.lastIndexOf( " . " ); return fileName.substring(pos); } @Override public String execute() { imageFileName = new Date().getTime() + getExtention(fileName); File imageFile = new File(ServletActionContext.getServletContext().getRealPath( " /UploadImages " ) + " / " + imageFileName); copy(myFile, imageFile); return SUCCESS; } ; color 分享到: download.js | UserTest 2009-11-12 01:25 浏览 750 评论(1) 查看更多 评论 1 楼 yuing 2010-09-21 [img][/img] 发表评论 您还没有登录,请您登录后再发表评论
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