struts2上传图片

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1.导入jar 包

commons-io-【version】

commons-fileupload-【version】

commons-logging-【version】

freemarker-【version】

log4j-【version】

ognl-【version】

struts2-core-【version】

xwork-core-【version】

2.配置web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.5"

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

<filter-name>struts2-cleanUp</filter-name>

<filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class>

</filter>

<filter-mapping>

<filter-name>struts2-cleanUp</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

<filter-name>struts2</filter-name>

<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>

</filter>

<filter-mapping>

<filter-name>struts2</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

<welcome-file-list>

<welcome-file>index.jsp</welcome-file>

</welcome-file-list>

</web-app>

3.创建 FileUploadAction

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.Date;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class FileUploadAction extends ActionSupport {
private String savePath;
private String myFileFileName;//获取的文件名
private File myFile;
private String myFileContentType;//获取文件的类型
private String fileName;
public File getMyFile() {
return myFile;
}
public void setMyFile(File myFile) {
this.myFile = myFile;
}

public String getMyFileFileName() {
return myFileFileName;
}
public String getMyFileContentType() {
return myFileContentType;
}
public void setMyFileFileName(String myFileFileName) {
this.myFileFileName = myFileFileName;
}
public void setMyFileContentType(String myFileContentType) {
this.myFileContentType = myFileContentType;
}

public String getFileName() {
return fileName;
}
public void setFileName(String fileName) {
this.fileName = fileName;
}
public void setSavePath(String savePath) {
this.savePath = savePath;
}
public String getSavePath() {
return savePath;
}
public String execute() throws Exception {
   //获取文件路径
String path = ServletActionContext.getServletContext().getRealPath(savePath);
File imageFile = new File(path + "//" +myFileFileName);
System.out.println(imageFile);
BufferedInputStream bis = null;//获取一个上传文件的输入流
BufferedOutputStream bos = null;//获取一个上传文件的输出流
try {
   bis = new BufferedInputStream(new FileInputStream(myFile));
   bos = new BufferedOutputStream(new FileOutputStream(imageFile));

   byte buf[] = new byte[(int)myFile.length()];
   int length = 0;
   while((length = bis.read(buf)) != -1) {
    bos.write(buf, 0, length);
   }

} catch (Exception e) {
   e.printStackTrace();
}finally {
   try {
    if(bis != null) {
     bis.close();
    }
   } catch (Exception e) {
    e.printStackTrace();
   }

   try {
    if(bos != null) {
     bos.close();
    }
   } catch (Exception e) {
    e.printStackTrace();
   }
}
return SUCCESS;
}
}

4.配置 struts.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

"http://struts.apache.org/dtds/struts-2.0.dtd">

<param name="savePath">images</param>

<result name="success">uploadsuc.jsp</result>

</action>

</package>

</struts>

5,写输入页面

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
   <body>
   <s:form action="fileUpload" method="post" enctype="multipart/form-data">
   <s:file name="myFile" label="选择图片"/>
   <s:submit value="上传"/>
   </s:form>
</body>

</html>

6.显示页面

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%@ taglib uri="/struts-tags" prefix="s" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

    <title>My JSP 'uploadsuc.jsp' starting page</title>
</head>
<body>
<s:debug></s:debug>
    <h2>上传成功</h2>
    <hr>
       <img alt="图片" src="<s:property value="savePath + '/'+myFileFileName" />">
</body>
</html>

</html>