- java.lang.Object
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- java.io.OutputStream
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- javax.servlet.ServletOutputStream
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- All Implemented Interfaces:
- Closeable, Flushable, AutoCloseable
public abstract class ServletOutputStream extends OutputStream
Provides an output stream for sending binary data to the client. AServletOutputStreamobject is normally retrieved via theServletResponse.getOutputStream()method.This is an abstract class that the servlet container implements. Subclasses of this class must implement the
java.io.OutputStream.write(int)method.- Author:
- Various
- See Also:
ServletResponse
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Constructor Summary
Constructors Modifier Constructor and Description protectedServletOutputStream()Does nothing, because this is an abstract class.
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method and Description abstract booleanisReady()This method can be used to determine if data can be written without blocking.voidprint(boolean b)Writes abooleanvalue to the client, with no carriage return-line feed (CRLF) character at the end.voidprint(char c)Writes a character to the client, with no carriage return-line feed (CRLF) at the end.voidprint(double d)Writes adoublevalue to the client, with no carriage return-line feed (CRLF) at the end.voidprint(float f)Writes afloatvalue to the client, with no carriage return-line feed (CRLF) at the end.voidprint(int i)Writes an int to the client, with no carriage return-line feed (CRLF) at the end.voidprint(long l)Writes alongvalue to the client, with no carriage return-line feed (CRLF) at the end.voidprint(String s)Writes aStringto the client, without a carriage return-line feed (CRLF) character at the end.voidprintln()Writes a carriage return-line feed (CRLF) to the client.voidprintln(boolean b)Writes abooleanvalue to the client, followed by a carriage return-line feed (CRLF).voidprintln(char c)Writes a character to the client, followed by a carriage return-line feed (CRLF).voidprintln(double d)Writes adoublevalue to the client, followed by a carriage return-line feed (CRLF).voidprintln(float f)Writes afloatvalue to the client, followed by a carriage return-line feed (CRLF).voidprintln(int i)Writes an int to the client, followed by a carriage return-line feed (CRLF) character.voidprintln(long l)Writes alongvalue to the client, followed by a carriage return-line feed (CRLF).voidprintln(String s)Writes aStringto the client, followed by a carriage return-line feed (CRLF).abstract voidsetWriteListener(WriteListener writeListener)Instructs theServletOutputStreamto invoke the providedWriteListenerwhen it is possible to write
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Constructor Detail
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ServletOutputStream
protected ServletOutputStream()
Does nothing, because this is an abstract class.
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Method Detail
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print
public void print(String s) throws IOException
Writes aStringto the client, without a carriage return-line feed (CRLF) character at the end.- Parameters:
s- theStringto send to the client- Throws:
IOException- if an input or output exception occurred
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print
public void print(boolean b) throws IOExceptionWrites abooleanvalue to the client, with no carriage return-line feed (CRLF) character at the end.- Parameters:
b- thebooleanvalue to send to the client- Throws:
IOException- if an input or output exception occurred
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print
public void print(char c) throws IOExceptionWrites a character to the client, with no carriage return-line feed (CRLF) at the end.- Parameters:
c- the character to send to the client- Throws:
IOException- if an input or output exception occurred
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print
public void print(int i) throws IOExceptionWrites an int to the client, with no carriage return-line feed (CRLF) at the end.- Parameters:
i- the int to send to the client- Throws:
IOException- if an input or output exception occurred
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print
public void print(long l) throws IOExceptionWrites alongvalue to the client, with no carriage return-line feed (CRLF) at the end.- Parameters:
l- thelongvalue to send to the client- Throws:
IOException- if an input or output exception occurred
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print
public void print(float f) throws IOExceptionWrites afloatvalue to the client, with no carriage return-line feed (CRLF) at the end.- Parameters:
f- thefloatvalue to send to the client- Throws:
IOException- if an input or output exception occurred
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print
public void print(double d) throws IOExceptionWrites adoublevalue to the client, with no carriage return-line feed (CRLF) at the end.- Parameters:
d- thedoublevalue to send to the client- Throws:
IOException- if an input or output exception occurred
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println
public void println() throws IOExceptionWrites a carriage return-line feed (CRLF) to the client.- Throws:
IOException- if an input or output exception occurred
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println
public void println(String s) throws IOException
Writes aStringto the client, followed by a carriage return-line feed (CRLF).- Parameters:
s- theStringto write to the client- Throws:
IOException- if an input or output exception occurred
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println
public void println(boolean b) throws IOExceptionWrites abooleanvalue to the client, followed by a carriage return-line feed (CRLF).- Parameters:
b- thebooleanvalue to write to the client- Throws:
IOException- if an input or output exception occurred
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println
public void println(char c) throws IOExceptionWrites a character to the client, followed by a carriage return-line feed (CRLF).- Parameters:
c- the character to write to the client- Throws:
IOException- if an input or output exception occurred
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println
public void println(int i) throws IOExceptionWrites an int to the client, followed by a carriage return-line feed (CRLF) character.- Parameters:
i- the int to write to the client- Throws:
IOException- if an input or output exception occurred
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println
public void println(long l) throws IOExceptionWrites alongvalue to the client, followed by a carriage return-line feed (CRLF).- Parameters:
l- thelongvalue to write to the client- Throws:
IOException- if an input or output exception occurred
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println
public void println(float f) throws IOExceptionWrites afloatvalue to the client, followed by a carriage return-line feed (CRLF).- Parameters:
f- thefloatvalue to write to the client- Throws:
IOException- if an input or output exception occurred
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println
public void println(double d) throws IOExceptionWrites adoublevalue to the client, followed by a carriage return-line feed (CRLF).- Parameters:
d- thedoublevalue to write to the client- Throws:
IOException- if an input or output exception occurred
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isReady
public abstract boolean isReady()
This method can be used to determine if data can be written without blocking.- Returns:
trueif a write to thisServletOutputStreamwill succeed, otherwise returnsfalse.- Since:
- Servlet 3.1
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setWriteListener
public abstract void setWriteListener(WriteListener writeListener)
Instructs theServletOutputStreamto invoke the providedWriteListenerwhen it is possible to write- Parameters:
writeListener- theWriteListenerthat should be notified when it's possible to write- Throws:
IllegalStateException- if one of the following conditions is true- the associated request is neither upgraded nor the async started
- setWriteListener is called more than once within the scope of the same request.
NullPointerException- if writeListener is null- Since:
- Servlet 3.1
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Document créé le 07/10/2007, dernière modification le 18/08/2025
Source du document imprimé : https://www.gaudry.be/java-api-javaee-rf-javax/servlet/ServletOutputStream.html
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