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Response encoding
Causes and Solutions:
Example:
1 packagecn.yzu;2 Importjava.io.IOException;3 Importjavax.servlet.ServletException;4 Importjavax.servlet.http.HttpServlet;5 Importjavax.servlet.http.HttpServletRequest;6 Importjavax.servlet.http.HttpServletResponse;7 public classAservletextendsHttpServlet {8 public voiddoget (httpservletrequest request, httpservletresponse response)9 throwsservletexception, IOException {TenResponse.setcontenttype ("text/html;charset=utf-8"); oneResponse.getwriter (). println ("zhang san"); aResponse.getwriter (). println ("john doe"); - } -}View Code
Run:
Request encoding
Post Request:
GET Request (conf/server.xml):
Example:
index.jsp
1 <%@ Page Language="Java"Import="java.util.*"pageencoding="UTF-8"%>2 <%3 StringPath=Request.getcontextpath ();4 StringBasePath=Request.getscheme ()+"://"+request.getservername ()+":"+Request.getserverport ()+Path+"/";5 %>6 <!DOCTYPE HTML public "-//w3c//dtd HTML 4.01 transitional//en">7 <HTML>8 <Head>9 <Basehref= "<%=basePath%>">Ten <title>My JSP ' index.jsp ' starting page</title> one <Metahttp-equiv= "pragma"content= "no-cache"> a <Metahttp-equiv= "cache-control"content= "no-cache"> - <Metahttp-equiv= "expires"content= "0"> - <Metahttp-equiv= "keywords"content= "keyword1,keyword2,keyword3"> the <Metahttp-equiv= "description"content= "this is my page"> - </Head> - <Body> - <formAction= "aservlet"Method= "post"> + <inputtype= "text"value= "zhang san"name= "zs"> - <inputtype= "submit"value= "post request"> + </form><HR> a <formAction= "aservlet"Method= "get"> at <inputtype= "text"value= "john doe"name= "ls"> - <inputtype= "submit"value= "get request"> - </form> - </Body> - </HTML>View Code
Aservlet
1 packagecn.yzu;2 Importjava.io.IOException;3 Importjavax.servlet.ServletException;4 Importjavax.servlet.http.HttpServlet;5 Importjavax.servlet.http.HttpServletRequest;6 Importjavax.servlet.http.HttpServletResponse;7 public classAservletextendsHttpServlet {8 public voiddoget (httpservletrequest request, httpservletresponse response)9 throwsservletexception, IOException {Ten //Handling GET Requests oneSystem.out.println (request.getparameter ("ls"));//Do not process aString name = Request.getparameter ("ls"); - byte[] B = Name.getbytes ("iso-8859-1");// fallback -Name =NewString (b, "utf-8");//re-editing the System.out.println (name); - - } - public voiddoPost (httpservletrequest request, httpservletresponse response) + throwsservletexception, IOException { - //Processing Post Requests +Request.setcharacterencoding ("utf-8"); aString username = Request.getparameter ("zs"); at System.out.println (username); - } -}View Code
Page:
Output result:
URL encoding:
URL encoding decoding example:
1 Importjava.io.UnsupportedEncodingException;2 Importjava.net.URLDecoder;3 Importjava.net.URLEncoder;4 Importorg.junit.Test;5 public classDemo {6 @Test7 public voidFun1 ()throwsunsupportedencodingexception {8String name = "zhang san";9String s = Urlencoder.encode (name, "UTF-8");//CodingTen System.out.println (s); ones = Urldecoder.decode (s, "utf-8");//decoding a System.out.println (s); - } -}View Code
Results:
Causes of various coding problems and solutions---------response encoding, request encoding, URL encoding
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