Javaweb-httpservletresponse (i)

I. Using OutputStream to flow to the client browser output "China"

1  PackageGacl.response.study;2 3 Importjava.io.IOException;4 ImportJava.io.OutputStream;5 Importjavax.servlet.ServletException;6 ImportJavax.servlet.http.HttpServlet;7 Importjavax.servlet.http.HttpServletRequest;8 ImportJavax.servlet.http.HttpServletResponse;9 Ten  Public classResponseDemo01extendsHttpServlet { One  A      Public voiddoget (httpservletrequest request, httpservletresponse response) -             throwsservletexception, IOException { -Outputchinesebyoutputstream (response);//output Chinese using outputstream stream the     } -      -     /** - * Output Chinese using outputstream stream +      */ -      Public voidOutputchinesebyoutputstream (httpservletresponse response)throwsioexception{ +         /**use OutputStream to output Chinese note questions: A * On the server side, the data is the Code table output, then control the client browser to open the corresponding code table, at * For example: Outputstream.write ("China". GetBytes ("UTF-8"));//use OutputStream to flow to the client browser output Chinese, output in UTF-8 encoding - * At this time to control the client browser to UTF-8 encoding open, otherwise display will appear when the Chinese garbled, then on the server side how to control the client browser to display data in UTF-8 encoding?  - * You can control the behavior of the browser by setting the response header, for example: - * Response.setheader ("Content-type", "text/html;charset=utf-8");//Display data with UTF-8 encoding by setting the response header control browser -          */ -String data = "China"; inOutputStream outputstream = Response.getoutputstream ();//get OutputStream output stream -Response.setheader ("Content-type", "text/html;charset=utf-8");//by setting the response header control browser to display data in UTF-8 encoding, if not add this sentence, then the browser will display is garbled to         /** + * Data.getbytes () is a process of converting a character into a byte array, which is sure to check the Code table, - * If it is a Chinese operating system environment, the default is to look for the GB2312 code table, the * The process of converting a character to a byte array is to convert the Chinese characters to the corresponding numbers on the GB2312 's Code table . * * For example: "Medium" on the GB2312 's Code table corresponding to the number is 98 $ * The corresponding number of "Guo" in GB2312 's code table isPanax Notoginseng          */ -         /** the * GetBytes () method if no parameters, then according to the operating system's language environment to choose the Conversion Code table, if it is a Chinese operating system, then use the GB2312 code table +          */ A         byte[] Databytearr = Data.getbytes ("UTF-8");//Converts a character to a byte array, specifying conversion with UTF-8 encoding theOutputstream.write (Databytearr);//using OutputStream to flow to the client output byte array +     } -  $      Public voidDoPost (httpservletrequest request, httpservletresponse response) $             throwsservletexception, IOException { - doget (request, response); -     } the  -}

Two. Use PrintWriter to flow to the client browser to output Chinese data

1  PackageGacl.response.study;2 3 Importjava.io.IOException;4 ImportJava.io.PrintWriter;5 6 Importjavax.servlet.ServletException;7 ImportJavax.servlet.http.HttpServlet;8 Importjavax.servlet.http.HttpServletRequest;9 ImportJavax.servlet.http.HttpServletResponse;Ten  One /** A * Output Chinese data using PrintWriter flow to client browser - * or the output of the "China" of the two Zi -  */ the  Public classResponseDemo02extendsHttpServlet { -  -     protected voidDoget (HttpServletRequest request, httpservletresponse response)throwsservletexception, IOException { -         //output Chinese using printwriter stream + Outputchinesebyprintwriter (response); -          +     } A     /* at * Output Chinese using PrintWriter stream -      */ -     Private voidOutputchinesebyprintwriter (httpservletresponse response)throwsIOException { -String data = "China"; -         //set to output characters in "Utf-8" encoding to the client browser -Response.setcharacterencoding ("UTF-8"); in         //get PrintWriter output stream -PrintWriter out =Response.getwriter (); toResponse.setheader ("Content-type", "Text/html;charset=utf-8"); +  -         //use PrintWriter to flow to client output characters the out.write (data); *     } $ Panax Notoginseng     protected voidDoPost (HttpServletRequest request, httpservletresponse response)throwsservletexception, IOException { - doget (request, response); the     } +  A}

Three. Use OutputStream or printwriter to output a number to the client browser

1  PackageGacl.response.study;2 3 Importjava.io.IOException;4 ImportJava.io.OutputStream;5 ImportJava.io.PrintWriter;6 7 Importjavax.servlet.ServletException;8 ImportJavax.servlet.ServletOutputStream;9 ImportJavax.servlet.http.HttpServlet;Ten Importjavax.servlet.http.HttpServletRequest; One ImportJavax.servlet.http.HttpServletResponse; A  - /** - * Output numbers to the client browser using OutputStream or PrintWriter the  */ -  Public classResponseDemo03extendsHttpServlet { -  -     protected voidDoget (HttpServletRequest request, httpservletresponse response)throwsservletexception, IOException { +         //using OutputStream Output 1 to the client browser -         //Outputonebyoutputstream (response); +         //using the PrintWriter stream to output the number 1 A Outputonebyprintwriter (response); at     } -     //using the PrintWriter stream to output the number 1 -      Public voidOutputonebyprintwriter (httpservletresponse response)throwsioexception{ -Response.setheader ("Content-type", "Text/html;charset=utf-8"); -Response.setcharacterencoding ("UTF-8"); -PrintWriter out = Response.getwriter ();//get PrintWriter output stream inOut.write ("Output number 1 with PrintWriter stream":); -Out.write (1+ ""); to     } +     //using OutputStream Output 1 to the client browser -     Private voidOutputonebyoutputstream (httpservletresponse response)throwsIOException { theResponse.setheader ("Content-type", "Text/html;charset=utf-8"); *OutputStream OutputStream =Response.getoutputstream (); $Outputstream.write ("Output number 1 with OutputStream stream:". GetBytes ("UTF-8")));Panax Notoginseng         //outputstream.write (1); -Outputstream.write (1+ ""). GetBytes ()); the     } +  A     protected voidDoPost (HttpServletRequest request, httpservletresponse response)throwsservletexception, IOException { the doget (request, response); +     } -  $}

Javaweb-httpservletresponse (i)