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java实现文件上传下载解决思路(2)

www.MyException.Cn  网友分享于:2013-01-25  浏览:404次

private String canSuffix = ".gif.jpg.jpeg.png"; //可上传的文件后缀名
private String objectPath = "c:/"; //目标文件目录
private String[] objectFileName = new String[255]; //目标文件名
private ServletInputStream sis = null; //输入流
private String[] description = new String[255]; //描述状态
private long size = 100 * 1024; //限制大小
private int count = 0; //已传输文件数目
private byte[] b = new byte[4096]; //字节流存放数组
private boolean successful = true;
private Hashtable fields = new Hashtable();
public MoqUploadBean() {
}
//设置上传文件的后缀名
public void setSuffix(String canSuffix) {
this.canSuffix = canSuffix;
}
//设置文件保存路径
public void setObjectPath(String objectPath) {
this.objectPath = objectPath;
}
//设置文件保存路径
public void setSize(long maxSize) {
this.size = maxSize;
}
//文件上传处理程序
public void setSourceFile(HttpServletRequest request) throws IOException {
sis = request.getInputStream();
int a = 0;
int k = 0;
String s = "";
while ( (a = sis.readLine(b, 0, b.length)) != -1) {
s = new String(b, 0, a);
if ( (k = s.indexOf("filename=\"")) != -1) {
// 取得文件数据
s = s.substring(k + 10);
k = s.indexOf("\"");
s = s.substring(0, k);
sourceFile[count] = s;
k = s.lastIndexOf(".");
suffix[count] = s.substring(k + 1);
if (canTransfer(count)) {
transferFile(count);
}
++count;
} else if ( (k = s.indexOf("name=\"")) != -1) {
// 普通表单输入元素,获取输入元素名字
String fieldName = s.substring(k+6, s.length()-3);
sis.readLine(b, 0, b.length);
StringBuffer fieldValue = new StringBuffer(b.length);
while ( (a = sis.readLine(b, 0, b.length)) != -1) {
s = new String(b, 0, a-2);
if ( (b[0] == 45) && (b[1] == 45) && (b[2] == 45) && (b[3] == 45) && (b[4] == 45)) {
break;
} else {
fieldValue.append(s);
}
}
fields.put(fieldName, fieldValue.toString());
}
if (!successful)
break;
}
}
//取得表单元素值
public String getFieldValue(String fieldName) {
if (fields == null || fieldName == null) {
return null;
}
return (String) fields.get(fieldName);
}
//取得上传文件数
public int getCount() {
return count;
}
//取得目标路径
public String getObjectPath() {
return objectPath;
}

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