Java 文件输出流 public FileOutputStream(字符串名称)抛出FileNotFoundException{ 此(名称!=null?新文件(名称):null,false); } 公共FileOutputStream(字符串名称,布尔追加) 抛出FileNotFoundException { 此(名称!=null?新文件(名称):null,追加); } 公共FileOutputStream(文件文件)引发FileNotFoundException{ 本文件(文件,虚假); } 公共文件输出流(文件文件,布尔追加) 抛出FileNotFoundException { 字符串名称=(file!=null?file.getPath():null); SecurityManager security=System.getSecurityManager(); if(安全性!=null){ 安全性。检查写入(名称); } if(name==null){ 抛出新的NullPointerException(); } if(file.isInvalid()){ 抛出新的FileNotFoundException(“无效文件路径”); } this.fd=新文件描述符(); this.append=append; this.path=名称; fd.incrementAndGetUseCount(); 打开(名称,附加); } 公共FileOutputStream(FileDescriptor fdObj){ SecurityManager security=System.getSecurityManager(); if(fdObj==null){ 抛出新的NullPointerException(); } if(安全性!=null){ 安全检查写入(fdObj); } this.fd=fdObj; this.path=null; this.append=false; fd.incrementAndGetUseCount(); } vate本机void open(字符串名称,布尔追加) 抛出FileNotFoundException; 私有本机void write(int b,boolean append)抛出IOException; 公共无效写入(int b)引发IOException{ 对象traceContext=IoTrace.fileWriteBegin(路径); int字节数=0; 试一试{ 写(b,追加); 字节数=1; }最后{ IoTrace.fileWriteEnd(traceContext,BytesWrited); } } 私有本机void writeBytes(字节b[],int off,int len,boolean append) 抛出IOException; 公共无效写入(字节b[])引发IOException{ 对象traceContext=IoTrace.fileWriteBegin(路径); int字节数=0; 试一试{ 写字节(b,0,b.length,append); 字节数=b.长度; }最后{ IoTrace.fileWriteEnd(traceContext,BytesWrited); } } public void close()引发IOException{ 已同步(关闭锁定){ 如果(关闭){ 回来 } 关闭=真; } 如果(通道!=null){ nt useCount=fd.decrementAndGetUseCount(); 如果((useCount
Java 文件输出流 public FileOutputStream(字符串名称)抛出FileNotFoundException{ 此(名称!=null?新文件(名称):null,false); } 公共FileOutputStream(字符串名称,布尔追加) 抛出FileNotFoundException { 此(名称!=null?新文件(名称):null,追加); } 公共FileOutputStream(文件文件)引发FileNotFoundException{ 本文件(文件,虚假); } 公共文件输出流(文件文件,布尔追加) 抛出FileNotFoundException { 字符串名称=(file!=null?file.getPath():null); SecurityManager security=System.getSecurityManager(); if(安全性!=null){ 安全性。检查写入(名称); } if(name==null){ 抛出新的NullPointerException(); } if(file.isInvalid()){ 抛出新的FileNotFoundException(“无效文件路径”); } this.fd=新文件描述符(); this.append=append; this.path=名称; fd.incrementAndGetUseCount(); 打开(名称,附加); } 公共FileOutputStream(FileDescriptor fdObj){ SecurityManager security=System.getSecurityManager(); if(fdObj==null){ 抛出新的NullPointerException(); } if(安全性!=null){ 安全检查写入(fdObj); } this.fd=fdObj; this.path=null; this.append=false; fd.incrementAndGetUseCount(); } vate本机void open(字符串名称,布尔追加) 抛出FileNotFoundException; 私有本机void write(int b,boolean append)抛出IOException; 公共无效写入(int b)引发IOException{ 对象traceContext=IoTrace.fileWriteBegin(路径); int字节数=0; 试一试{ 写(b,追加); 字节数=1; }最后{ IoTrace.fileWriteEnd(traceContext,BytesWrited); } } 私有本机void writeBytes(字节b[],int off,int len,boolean append) 抛出IOException; 公共无效写入(字节b[])引发IOException{ 对象traceContext=IoTrace.fileWriteBegin(路径); int字节数=0; 试一试{ 写字节(b,0,b.length,append); 字节数=b.长度; }最后{ IoTrace.fileWriteEnd(traceContext,BytesWrited); } } public void close()引发IOException{ 已同步(关闭锁定){ 如果(关闭){ 回来 } 关闭=真; } 如果(通道!=null){ nt useCount=fd.decrementAndGetUseCount(); 如果((useCount,java,xlsx,Java,Xlsx,FileNotFoundException通常在文件不存在时抛出。我建议您检查文件路径 一般来说,使用绝对文件路径是个坏主意。相反,将所需的文件放在当前工作文件夹中(可以通过System.getProperty(“user.dir”);)找到),只需调用:FileInputStream(“CFM\u test.xlsx”)文件D:\webs\Softparam2\upload\1\1429175417820\cfm\cfm\u test.xlsx是否存在?很简单,您的文件不存在于该路径上……如果
FileNotFoundException
通常在文件不存在时抛出。我建议您检查文件路径
一般来说,使用绝对文件路径是个坏主意。相反,将所需的文件放在当前工作文件夹中(可以通过
System.getProperty(“user.dir”);
)找到),只需调用:FileInputStream(“CFM\u test.xlsx”)
文件D:\webs\Softparam2\upload\1\1429175417820\cfm\cfm\u test.xlsx是否存在?很简单,您的文件不存在于该路径上……如果存在……您不被允许访问它……我们需要您尝试过的信息和一个实际问题,我不会从bddat java.io.FileOutputStre中取消上传此文件java.io.FileOutputStream.(FileOutputStream.java:221)net.atos.softparam.util.CsvGenerator.createCfmFile(CsvGenerator.java:854)net.atos.softparam.util.CsvGenerator.createFiles(CsvGenerator.java:227)path+=“cfm/”;new File(path.mkdirs();试试看{FileOutputStream fileOut=new FileOutputStream(path+“CFM_”+storeBrand.getName()+“.xlsx”);wb.write(fileOut);fileOut.close();}catch(IOException e){e.printStackTrace();}返回错误。toString();}所代表的路径是什么?文件的chemin?System.getProperty(“user.dir”);
返回一个包含当前工作目录的字符串。工作目录是应用程序运行所在目录的术语。例如,C:\Program Files\eclipse luna\workbench您可以使用此简单命令为应用程序依赖项设置文件路径,如:final string path=System.getProperty(“user.dir”)+;
FileInputStream fileIn=newfileinputstream(path);
然后只需将文件移动到System.out.println(System.getProperty(“user.dir”);
public FileOutputStream(String name) throws FileNotFoundException {
this(name != null ? new File(name) : null, false);
}
public FileOutputStream(String name, boolean append)
throws FileNotFoundException
{
this(name != null ? new File(name) : null, append);
}
public FileOutputStream(File file) throws FileNotFoundException {
this(file, false);
}
public FileOutputStream(File file, boolean append)
throws FileNotFoundException
{
String name = (file != null ? file.getPath() : null);
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkWrite(name);
}
if (name == null) {
throw new NullPointerException();
}
if (file.isInvalid()) {
throw new FileNotFoundException("Invalid file path");
}
this.fd = new FileDescriptor();
this.append = append;
this.path = name;
fd.incrementAndGetUseCount();
open(name, append);
}
public FileOutputStream(FileDescriptor fdObj) {
SecurityManager security = System.getSecurityManager();
if (fdObj == null) {
throw new NullPointerException();
}
if (security != null) {
security.checkWrite(fdObj);
}
this.fd = fdObj;
this.path = null;
this.append = false;
fd.incrementAndGetUseCount();
}
vate native void open(String name, boolean append)
throws FileNotFoundException;
private native void write(int b, boolean append) throws IOException;
public void write(int b) throws IOException {
Object traceContext = IoTrace.fileWriteBegin(path);
int bytesWritten = 0;
try {
write(b, append);
bytesWritten = 1;
} finally {
IoTrace.fileWriteEnd(traceContext, bytesWritten);
}
}
private native void writeBytes(byte b[], int off, int len, boolean append)
throws IOException;
public void write(byte b[]) throws IOException {
Object traceContext = IoTrace.fileWriteBegin(path);
int bytesWritten = 0;
try {
writeBytes(b, 0, b.length, append);
bytesWritten = b.length;
} finally {
IoTrace.fileWriteEnd(traceContext, bytesWritten);
}
}
public void close() throws IOException {
synchronized (closeLock) {
if (closed) {
return;
}
closed = true;
}
if (channel != null) {
nt useCount = fd.decrementAndGetUseCount();
if ((useCount <= 0) || !isRunningFinalize()) {
close0();
}
}
public final FileDescriptor getFD() throws IOException {
if (fd != null) return fd;
throw new IOException();
public FileChannel getChannel() {
synchronized (this) {
if (channel == null) {
channel = FileChannelImpl.open(fd, path, false, true, append, this);
fd.incrementAndGetUseCount();
}
return channel;
}
}
protected void finalize() throws IOException {
if (fd != null) {
if (fd == FileDescriptor.out || fd == FileDescriptor.err) {
flush();
} else {
runningFinalize.set(Boolean.TRUE);
try {
close();
} finally {
runningFinalize.set(Boolean.FALSE);
}
}
private native void close0() throws IOException;
private static native void initIDs();
static {
initIDs();
java.io.FileNotFoundException: D:\webs\Softparam2\upload\1\1429175417820\cfm\CFM_test.xlsx (Le périphérique n’est pas prêt)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:221)
at java.io.FileOutputStream.<init>(FileOutput)