Java Doc for ServletResponse.java in  » EJB-Server-resin-3.1.5 » jsdk » javax » servlet » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server resin 3.1.5 » jsdk » javax.servlet 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


javax.servlet.ServletResponse

All known Subclasses:   javax.servlet.ServletResponseWrapper,
ServletResponse
public interface ServletResponse (Code)
ServletReponse control the output to the client.

A typical servlet will output its response as follows:

 response.setContentType("text/html; charset=UTF-8");
 PrintWriter pw = response.getWriter();
 pw.println("Hello, world");
 

Buffering

The servlet engine buffers output before sending it to the client. Buffering adds efficiency and flexibility. Until data is actually committed to the client, the servlet can change headers or reset the entire results.

Character encoding

Use either setContentType or setLocale to set the character encoding.
 response.setContentType("text/html; charset=ISO-8859-2");
 




Method Summary
public  voidflushBuffer()
     Flushes the buffer to the client.
public  intgetBufferSize()
     Returns the size of the output buffer.
public  StringgetCharacterEncoding()
     Returns the character encoding the response is using for output.
public  StringgetContentType()
     Returns the content type for the response.
public  LocalegetLocale()
     Returns the output locale.
public  ServletOutputStreamgetOutputStream()
     Returns an output stream for writing to the client.
public  PrintWritergetWriter()
     Returns a PrintWriter with the proper character encoding for writing text data to the client.
public  booleanisCommitted()
     Returns true if some data has actually been send to the client.
public  voidreset()
     Resets the output stream, clearing headers and the output buffer.
public  voidresetBuffer()
     Resets the output stream, clearing headers and the output buffer.
public  voidsetBufferSize(int size)
     Sets the output buffer size to size.
public  voidsetCharacterEncoding(String charset)
     Sets the character encoding the response is using for output.
public  voidsetContentLength(int len)
     Explicitly sets the length of the result value.
public  voidsetContentType(String type)
     Sets the response content type.
public  voidsetLocale(Locale locale)
     Sets the output locale.



Method Detail
flushBuffer
public void flushBuffer() throws IOException(Code)
Flushes the buffer to the client.



getBufferSize
public int getBufferSize()(Code)
Returns the size of the output buffer.



getCharacterEncoding
public String getCharacterEncoding()(Code)
Returns the character encoding the response is using for output. If no character encoding is specified, ISO-8859-1 will be used.



getContentType
public String getContentType()(Code)
Returns the content type for the response.
since:
   2.4



getLocale
public Locale getLocale()(Code)
Returns the output locale.



getOutputStream
public ServletOutputStream getOutputStream() throws IOException(Code)
Returns an output stream for writing to the client. You can use the output stream to write binary data.



getWriter
public PrintWriter getWriter() throws IOException(Code)
Returns a PrintWriter with the proper character encoding for writing text data to the client.



isCommitted
public boolean isCommitted()(Code)
Returns true if some data has actually been send to the client. The data will be sent if the buffer overflows or if it's explicitly flushed.



reset
public void reset()(Code)
Resets the output stream, clearing headers and the output buffer. Calling reset() after data has been committed is illegal.
throws:
  IllegalStateException - if isCommitted() is true.



resetBuffer
public void resetBuffer()(Code)
Resets the output stream, clearing headers and the output buffer. Calling reset() after data has been committed is illegal.
throws:
  IllegalStateException - if isCommitted() is true.



setBufferSize
public void setBufferSize(int size)(Code)
Sets the output buffer size to size. The servlet engine may round the size up.
Parameters:
  size - the new output buffer size.



setCharacterEncoding
public void setCharacterEncoding(String charset)(Code)
Sets the character encoding the response is using for output. If no character encoding is specified, ISO-8859-1 will be used.
since:
   2.4



setContentLength
public void setContentLength(int len)(Code)
Explicitly sets the length of the result value. Normally, the servlet engine will handle this.



setContentType
public void setContentType(String type)(Code)
Sets the response content type. The content type includes the character encoding. The content type must be set before calling getWriter() so the writer can use the proper character encoding.

To set the output character encoding to ISO-8859-2, use the following:

 response.setContentType("text/html; charset=ISO-8859-2");
 

Parameters:
  type - the mime type of the output



setLocale
public void setLocale(Locale locale)(Code)
Sets the output locale. The response will set the character encoding based on the locale. For example, setting the "kr" locale will set the character encoding to "EUC_KR".



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