struts2上传文件的小例子
2015-09-28 23:16
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准备工作：看看lib文件夹下有没有commons-io和commons-fileupload这两个jar文件
如图
之后呢，我们需要两个jsp文件一个用来写上传表单，一个用来显示刚刚上传的文件，我待会会上传一个图片，所以在这里的显示结果页面我就用了img
上传页面的jsp内容
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<s:form action="upload" enctype="multipart/form-data">
<s:file name="upload" label="选择文件"/>
<s:submit/>
</s:form>
</body>
</html>
结果显示页的内容（我自己加了一些显示参数的东东）
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
上传成功
savePath = <s:property value="realPath"/>
<hr>
uploadFileName = <s:property value="uploadFileName"/>
<hr>
uploadContentType = <s:property value="uploadContentType"/>
<hr>
<img alt="上传的图片" src='<s:property value="realPath"/>'>
</body>
</html>
struts.xml的配置
<span style="white-space:pre"> </span><action name="upload" class="action.TestUpload">
<param name="savePath">/uploadFiles</param>
<result>/content/succ.jsp</result>
</action>savePath就是上传的文件的存放路径
接下来就是action类的内容
此处的uploadContentType和uploadFileName如果没有也能用（使用getUpload().getName()）即可获得文件名，但是这样弄的文件名就不是原来的文件名了
package action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class TestUpload extends ActionSupport {
private File upload;
private String uploadContentType;
private String uploadFileName;
private String savePath;
private String realPath;
public String getRealPath() {
return realPath;
}
public void setRealPath(String realPath) {
this.realPath = realPath;
}
public void setSavePath(String value) {
this.savePath = value;
}
private String getSavePath() throws Exception {
return ServletActionContext.getServletContext().getRealPath(savePath);
}
public File getUpload() {
return upload;
}
public void setUpload(File upload) {
this.upload = upload;
}
public String getUploadContentType() {
return uploadContentType;
}
public void setUploadContentType(String uploadContentType) {
this.uploadContentType = uploadContentType;
}
public String getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}
public String execute() throws Exception {
//获取上传的文件路径
setRealPath(getSavePath() + "\\" + getUploadFileName());
//创建一个输出流，准备用来在上传文件夹中写入文件内容
FileOutputStream fos = new FileOutputStream(getSavePath() + "\\" + getUploadFileName());
//创建一个输入流，获取刚刚上传的文件
FileInputStream fis = new FileInputStream(getUpload());
//相当于一次写入1kb的文件内容
byte[] buffer = new byte[1024];
int len = 0;
//从输入流中读取字节，len是用来计算本次循环所读取的长度
while((len = fis.read(buffer)) > 0) {
//写入输出流
fos.write(buffer, 0, len);
}
return SUCCESS;
}
}
如图
之后呢，我们需要两个jsp文件一个用来写上传表单，一个用来显示刚刚上传的文件，我待会会上传一个图片，所以在这里的显示结果页面我就用了img
上传页面的jsp内容
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<s:form action="upload" enctype="multipart/form-data">
<s:file name="upload" label="选择文件"/>
<s:submit/>
</s:form>
</body>
</html>
结果显示页的内容（我自己加了一些显示参数的东东）
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
上传成功
savePath = <s:property value="realPath"/>
<hr>
uploadFileName = <s:property value="uploadFileName"/>
<hr>
uploadContentType = <s:property value="uploadContentType"/>
<hr>
<img alt="上传的图片" src='<s:property value="realPath"/>'>
</body>
</html>
struts.xml的配置
<span style="white-space:pre"> </span><action name="upload" class="action.TestUpload">
<param name="savePath">/uploadFiles</param>
<result>/content/succ.jsp</result>
</action>savePath就是上传的文件的存放路径
接下来就是action类的内容
此处的uploadContentType和uploadFileName如果没有也能用（使用getUpload().getName()）即可获得文件名，但是这样弄的文件名就不是原来的文件名了
package action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class TestUpload extends ActionSupport {
private File upload;
private String uploadContentType;
private String uploadFileName;
private String savePath;
private String realPath;
public String getRealPath() {
return realPath;
}
public void setRealPath(String realPath) {
this.realPath = realPath;
}
public void setSavePath(String value) {
this.savePath = value;
}
private String getSavePath() throws Exception {
return ServletActionContext.getServletContext().getRealPath(savePath);
}
public File getUpload() {
return upload;
}
public void setUpload(File upload) {
this.upload = upload;
}
public String getUploadContentType() {
return uploadContentType;
}
public void setUploadContentType(String uploadContentType) {
this.uploadContentType = uploadContentType;
}
public String getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}
public String execute() throws Exception {
//获取上传的文件路径
setRealPath(getSavePath() + "\\" + getUploadFileName());
//创建一个输出流，准备用来在上传文件夹中写入文件内容
FileOutputStream fos = new FileOutputStream(getSavePath() + "\\" + getUploadFileName());
//创建一个输入流，获取刚刚上传的文件
FileInputStream fis = new FileInputStream(getUpload());
//相当于一次写入1kb的文件内容
byte[] buffer = new byte[1024];
int len = 0;
//从输入流中读取字节，len是用来计算本次循环所读取的长度
while((len = fis.read(buffer)) > 0) {
//写入输出流
fos.write(buffer, 0, len);
}
return SUCCESS;
}
}
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