JSP must be GBK encoded when Java code getparameter get Chinese garbled solution

I am very unfamiliar with java,jsp and other related pages, today in order to modify others left behind in the Java background HTML nested JSP to do the interface of some content in the project was tortured. When I pass in the text or textarea, the GetParameter method always gets a bunch? , no one can ask, had to look blindly on the Internet. There are many ways to change the JSP code on the Internet, there are a lot of code in Java to do a variety of conversion, tried and tried, no use. May be successful, but my situation is that the current JSP reference other JSP, but the other JSP from GBK to Utf-8 after the reported html-500 error, in order not to cause more unknown errors, I gave up the attempt to modify the direction of the interface encoding. Then in Csdn a post in the high score of the 18 floor of the solution to help me, in order to avoid forgetting, I will refer to this post, address http://bbs.csdn.net/topics/390360298. Let's take a look at this magical class:

1  Public classHttprequestreader {2 3Hashtable pairs =NewHashtable ();4 5     /**6 * Rawparameterreader constructor comment.7      */8      PublicHttprequestreader (httpservletrequest request, String encoding)9             throwsIOException {Ten         Super(); One Parse (request.getquerystring (), encoding); A Parse (Request.getreader (). ReadLine (), encoding); -     } -  the      Public StaticString decode (string s, string encoding)throwsException { -StringBuffer SB =NewStringBuffer (); -          for(inti = 0; I < s.length (); i++) { -             Charc =S.charat (i); +             Switch(c) { -              Case+: +Sb.append (' '); A                  Break; at              Case‘%‘: -                 Try { -Sb.append ((Char) Integer.parseint ( -S.substring (i + 1, i + 3), 16)); -}Catch(NumberFormatException e) { -                     Throw Newillegalargumentexception (); in                 } -i + = 2; to                  Break; +             default: - Sb.append (c); the                  Break; *             } $         }Panax Notoginseng         //Undo conversion to external encoding -String result =sb.tostring (); the         byte[] inputbytes = Result.getbytes ("8859_1"); +         return NewString (inputbytes, encoding); A     } the  +     /** - * Insert The method ' s description here. Creation Date: (2001-2-4 17:30:59) $      *  $      * @returnjava.lang.String -      * @paramname - * java.lang.String the      */ -      Publicstring GetParameter (string name) {Wuyi         if(Pairs = =NULL|| !Pairs.containskey (name)) the             return NULL; -         return(String) (((ArrayList) pairs.get (name)). Get (0)); Wu     } -  About     /** $ * Insert The method ' s description here. Creation Date: (2001-2-4 17:28:17) -      *  -      * @returnjava.util.Enumeration -      */ A      PublicEnumeration Getparameternames () { +         if(Pairs = =NULL) the             return NULL; -         returnPairs.keys (); $     } the  the     /** the * Insert The method ' s description here. Creation Date: (2001-2-4 17:33:40) the      *  -      * @returnjava.lang.string[] in      * @paramname the * java.lang.String the      */ About      Publicstring[] Getparametervalues (String name) { the         if(Pairs = =NULL|| !Pairs.containskey (name)) the             return NULL; theArrayList Al =(ArrayList) pairs.get (name); +String[] values =Newstring[al.size ()]; -          for(inti = 0; i < values.length; i++) theValues[i] =(String) al.get (i);Bayi         returnvalues; the     } the  -     /** - * Insert The method ' s description here. Creation Date: (2001-2-4 20:34:37) the      *  the      * @paramUrlenc the * java.lang.String the      */ -     Private voidParse (string urlenc, string encoding) the             throwsjava.io.IOException { the         if(Urlenc = =NULL) the             return;94StringTokenizer tok =NewStringTokenizer (Urlenc, "&"); the         Try { the              while(Tok.hasmoretokens ()) { theString Apair =Tok.nexttoken ();98                 intpos = apair.indexof ("="); AboutString name =NULL; -String value =NULL;101                 if(pos! =-1) {102Name = Decode (apair.substring (0, POS), encoding);103Value = Decode (apair.substring (pos + 1), encoding);104}Else { theName =Apair;106Value = "";107                 }108                 if(Pairs.containskey (name)) {109ArrayList values =(ArrayList) pairs.get (name); the Values.add (value);111}Else { theArrayList values =NewArrayList ();113 Values.add (value); the pairs.put (name, values); the                 } the             }117}Catch(Exception e) {118             Throw Newjava.io.IOException (E.getmessage ());119         } -     }121}

After I introduced my Java project, I added the following packages:

1 Import java.io.IOException; 2 Import java.util.ArrayList; 3 Import java.util.Enumeration; 4 Import java.util.Hashtable; 5 Import Java.util.StringTokenizer; 6 7 import javax.servlet.http.HttpServletRequest;

So that it can be used.

Make the application where it is needed:

1  Public voidSave (HttpServletRequest req, HttpServletResponse resp)2             throwsservletexception, IOException {3         Try {4Httprequestreader Paramreader =NewHttprequestreader (req, "GBK");5String stralertmsg = Paramreader.getparameter ("Device. Alertmsg ");6}Catch(Exception e) {7              This. Findforward ("/device-details.jsp",true, req, resp);8             return;9         }Ten          This. Findforward ("/device-details.jsp",true, req, resp); One         return; A}

And then it's OK!

JSP must be GBK encoded when Java code getparameter get Chinese garbled solution