Table of Contents
What is PrintWriter and getWriter?
PrintWriter: prints text data to a character stream. getWriter :Returns a PrintWriter object that can send character text to the client.
What is difference between PrintWriter and ServletOutputStream your answer?
For writing byte-oriented informations (such as image etc), we use ServletOutputStream class. It is a byte-stream class. On the other hand, PrintWriter class can only be used to write character based informations. It is a character-oriented class.
What does Response getOutputStream do?
getOutputStream. Returns a ServletOutputStream suitable for writing binary data in the response. The servlet container does not encode the binary data. Calling flush() on the ServletOutputStream commits the response.
Should I close OutputStream?
Close an OutputStream Once you are done writing data to a Java OutputStream you should close it.
What is Java getOutputStream?
The getOutputStream() method of Java Socket class returns an output stream for the given socket. If you close the returned OutputStream then it will close the linked socket.
Which class defines getWriter method?
The class HttpServletResponse defines the getWriter method.
What is the difference between PrintWriter and FileWriter?
PrintWriter gives you some handy methods for formatting like println and printf . So if you need to write printed text – you can use it. FileWriter is more like “low-level” writer that gives you ability to write only strings and char arrays.
Should I close Getresourceasstream?
You should always close streams (and any other Closeable, actually), no matter how they were given to you. Note that since Java 7, the preferred method to handle closing any resource is definitely the try-with-resources construct.
Should one call close () on OutputStream after it has been written?
In Java Servlets, one can access the response body via response.getOutputStream () or response.getWriter (). Should one call .close () on this OutputStream after it has been written to? On the one hand, there is the Blochian exhortation to always close OutputStream s.
What does HttpServletResponse getoutputstream () return?
In the case of HttpServletResponse, it’s a bit less clear cut, since it’s not obvious if calling getOutputStream () is an operation that opens the stream. The Javadoc just says that it ” Returns a ServletOutputStream “; similarly for getWriter ().
Is it mandatory to close the OutputStream from a servlet?
The stand-in stream prevents the servlet from closing the original response stream when it completes and allows the filter to modify the servlet’s response. One can infer from that official Sun article that closing the OutputStream from a servlet is something that is a normal occurrence, but is not mandatory. Show activity on this post.
Do I need to close the OutputStream when making a filter?
Also as a developer of a Filter you should not presume that the OutputStream is not closed, you should always pass another OutputStream if you want to alter the content after the servlet has done its job. EDIT : I’m always closing the stream and I didn’t had any problems with Tomcat/Jetty.