1.文件上传
（1）FileAction类
@ParentPackage("javastruts")
@Namespace("file")
public class FileAction extends CommonAction
{
private static final long serialVersionUID = 1L;
@Actions({
@Action(value="/upload",results={
@Result(name="success",location="/main.jsp"),
@Result(name="input",location="/file.jsp")
},
interceptorRefs={
@InterceptorRef(value="fileUpload",params={"allowedExtensions",".jpg,.rar","maximumSize","10485760"}),
@InterceptorRef(value="defaultStack")
}
)
})
public String upload()
{
File saveFile = new File("D:\\upload\\"+uploadFileName);
try {
FileUtils.copyFile(upload, saveFile);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "success";
}
private File upload;
private String uploadFileName;//规定获取文件名的属性
private String desc;
public File getUpload() {
return upload;
}
public void setUpload(File upload) {
this.upload = upload;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public String getUploadFileName() {
return uploadFileName;
}
public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}
}
（2）访问入口file.jsp
<body>
<s:fielderror></s:fielderror><!-- 错误提示 -->
<form action="file/upload" method="post" enctype="multipart/form-data">
<s:text name="abcd"></s:text>:
<input type="file" name="upload"><br />
描述:<input type="text" name="desc"><br />
<input type="submit" value="提交"/>
</form>
</body>
（3）成功跳转main.jsp
<body>
文件上传成功
</body>
（4）文件大小
默认为2M可通过修改struts.xml
<constant name="struts.multipart.maxSize" value="62914560"></constant>
2.文件下载
@Actions({
@Action(value="/download",results={
@Result(name="success",type="stream",
params= {"inputName","downFile",
//与getDownFile对应返回文件流
"contentDisposition","attachment;filename=${oldFileName}"}),
//客户端浏览器处理 附件 弹出对话框下载
}
)
})
public String download()
{
//接收输入的参数ID
//根据ID到数据库查询文件
//处理业务规则
//处理完成
newFileName = "D:\\upload\\111.txt";
try {
oldFileName = new String("运行.txt".getBytes(),"ISO-8859-1");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return "success";
}
public InputStream getDownFile(){
FileInputStream fileInputStream =null;
try {
fileInputStream = new FileInputStream(newFileName);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return fileInputStream;
}
private String newFileName;
private String oldFileName;
public String getOldFileName() {
return oldFileName;
}
3.国际化
修改文件上传失败的提示信息
（1）创建同名的配置文件FileAction.properties
在struts-default.xml找到相应的提示出错的参数
例如：上传文件的格式错误
struts.messages.error.file.extension.not.allowed=File extension not allowed
（2）中文提示，创建同名的配置文件FileAction_zh_CN.properties
struts.messages.error.file.extension.not.allowed=
\u4E0A\u4F20\u6587\u4EF6\u7C7B\u578B\u4E0D\u7B26
//IOS-8859-1的编码
（3）全局配置国际化
在sturts.xml配置
<constant name="struts.custom.i18n.resources" value="i18n"></constant>
创建名称为i18n.properties的配置文件
struts.messages.error.file.extension.not.allowed=File extension not allowed
（4）全局配置中文（同上）
创建名称为i18n_zh_CN.properties的配置文件
struts.messages.error.file.extension.not.allowed=
\u4E0A\u4F20\u6587\u4EF6\u7C7B\u578B\u4E0D\u7B26
//IOS-8859-1的编码