UTF-8 encoding in JSP page

Question

I have a JSP page whose page encoding is ISO-8859-1  This JSP page there is in a question answer blog  I want to include special characters during Q A posting    The problem is JSP is not supporting UTF-8 encoding even I have changed it from ISO-8859-1 to UTF-8  These characters       amp     are making problem  When I am posting these character either individually or with the combination of any character it is storinh null in the database and when I remove these characters while posting application it is working fine    Can any one suggest some solution

User · Answer

Thanks for all the Hints  Using Tomcat8 I also added a filter like  Jasper de Vries wrote  But in the newer Tomcats nowadays there is a filter already implemented that can be used resp just uncommented in the Tomcat web xml    lt filter gt       lt filter-name gt setCharacterEncodingFilter lt  filter-name gt       lt filter-class gt org apache catalina filters SetCharacterEncodingFilter lt  filter-class gt       lt init-param gt           lt param-name gt encoding lt  param-name gt           lt param-value gt UTF-8 lt  param-value gt       lt  init-param gt       lt async-supported gt true lt  async-supported gt   lt  filter gt       lt filter-mapping gt       lt filter-name gt setCharacterEncodingFilter lt  filter-name gt       lt url-pattern gt    lt  url-pattern gt   lt  filter-mapping gt    And like all others posted  I added the URIEncoding  UTF-8  to the Tomcat Connector in Apache  That also helped   Important to say  that Eclipse  if you use this  has a copy of its web xml and overwrites the Tomcat-Settings as it was explained here  Broken UTF-8 URI Encoding in JSPs

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You have to make sure the file is been saved with UTF-8 encoding  You can do it with several plain text editors  With Notepad    i e   you can choose in the menu Encoding-- Encode in UTF-8  You can also do it even with Windows  Notepad  Save As --  Encoding UTF-8   If you are using Eclipse  you can set it in the file s Properties   Also  check if the problem is that you have to escape those characters  It wouldn t be strange that were your problem  as one of the characters is  amp

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I also had an issue displaying charectors like    U  I added the following to my web xml    lt jsp-config gt       lt jsp-property-group gt           lt url-pattern gt   jsp lt  url-pattern gt           lt page-encoding gt UTF-8 lt  page-encoding gt       lt  jsp-property-group gt   lt  jsp-config gt    This solved the issue in the pages except header  Tried many ways to solve this and nothing worked in my case  The issue with header was header jsp page is included from another jsp  So gave the encoding to the import and that solved my problem     lt c import url   Header1 jsp  charEncoding  UTF-8   gt    Thanks

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You should use the same encoding on all layers of your application to avoid this problem  It is useful to add a filter to set the encoding   public void doFilter ServletRequest request                       ServletResponse response                       FilterChain chain  throws ServletException      request setCharacterEncoding  UTF-8       chain doFilter request  response       To only set the encoding on your JSP pages  add this line to them    lt    page contentType  text html  charset UTF-8    gt    Configure your database to use the same char encoding as well   If you need to convert the encoding of a string see    Encoding conversion in java   I would not recommend to store HTML encoded text in your database  For example  if you need to generate a PDF  or anything other than HTML  you need to convert the HTML encoding first

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I used encoding filter which has solved my all encoding problem         package com dina filter       import java io IOException      import javax servlet Filter      import javax servlet FilterChain      import javax servlet FilterConfig      import javax servlet ServletException      import javax servlet ServletRequest      import javax servlet ServletResponse                          author DINANATH             public class EncodingFilter implements Filter            private String encoding    utf-8            public void doFilter ServletRequest request ServletResponse response  FilterChain filterChain  throws IOException  ServletException               request setCharacterEncoding encoding                         response setContentType  text html charset UTF-8                        response setCharacterEncoding encoding               filterChain doFilter request  response                       public void init FilterConfig filterConfig  throws ServletException               String encodingParam   filterConfig getInitParameter  encoding                if  encodingParam    null                    encoding   encodingParam                                   public void destroy                    nothing todo                    in web xml       lt filter gt           lt filter-name gt EncodingFilter lt  filter-name gt           lt filter-class gt          com dina filter EncodingFilter          lt  filter-class gt           lt init-param gt               lt param-name gt encoding lt  param-name gt               lt param-value gt UTF-8 lt  param-value gt           lt  init-param gt           lt init-param gt           lt param-name gt forceEncoding lt  param-name gt           lt param-value gt true lt  param-value gt       lt  init-param gt       lt  filter gt       lt filter-mapping gt           lt filter-name gt EncodingFilter lt  filter-name gt           lt url-pattern gt    lt  url-pattern gt       lt  filter-mapping gt

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Page encoding or anything else do not matter a lot  ISO-8859-1 is a subset of UTF-8  therefore you never have to convert ISO-8859-1 to UTF-8 because ISO-8859-1 is already UTF-8 a subset of UTF-8 but still UTF-8  Plus  all that do not mean a thing if You have a double encoding somewhere   This is my  cure all  recipe for all things encoding and charset related           String myString    heartbroken          String is double encoded  fix that first                   myString   new String myString getBytes StandardCharsets ISO 8859 1   StandardCharsets UTF 8                   String cleanedText   StringEscapeUtils unescapeJava myString                   byte   bytes   cleanedText getBytes StandardCharsets UTF 8                   String text   new String bytes  StandardCharsets UTF 8                   Charset charset   Charset forName  UTF-8                    CharsetDecoder decoder   charset newDecoder                    decoder onMalformedInput CodingErrorAction IGNORE                   decoder onUnmappableCharacter CodingErrorAction IGNORE                   CharsetEncoder encoder   charset newEncoder                    encoder onMalformedInput CodingErrorAction IGNORE                   encoder onUnmappableCharacter CodingErrorAction IGNORE                   try                          The new ByteBuffer is ready to be read                      ByteBuffer bbuf   encoder encode CharBuffer wrap text                           The new ByteBuffer is ready to be read                      CharBuffer cbuf   decoder decode bbuf                       String str   cbuf toString                      catch  CharacterCodingException e                        logger error  Error Message if you want to

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The default JSP file encoding is specified by JSR315 as ISO-8859-1  This is the encoding that the JSP engine uses to read the JSP file and it is unrelated to the servlet request or response encoding   If you have non-latin characters in your JSP files  save the JSP file as UTF-8 with BOM or set pageEncoding in the beginning of the JSP page    lt   page pageEncoding  UTF-8    gt      However  you might want to change the default to UTF-8 globally for all JSP pages  That can be done via web xml    lt jsp-config gt       lt jsp-property-group gt           lt url-pattern gt    lt  url-pattern gt           lt page-encoding gt UTF-8 lt  page-encoding gt       lt  jsp-property-group gt   lt  jsp-config gt    Or  when using Spring Boot with an  embedded  Tomcat  via a TomcatContextCustomizer    Component public class JspConfig implements TomcatContextCustomizer        Override     public void customize Context context            JspPropertyGroup pg   new JspPropertyGroup            pg addUrlPattern                pg setPageEncoding  UTF-8            pg setTrimWhitespace  true       optional  but nice to have         ArrayList lt JspPropertyGroupDescriptor gt  pgs   new ArrayList lt  gt             pgs add new JspPropertyGroupDescriptorImpl pg            context setJspConfigDescriptor new JspConfigDescriptorImpl pgs  new ArrayList lt TaglibDescriptor gt                 For JSP to work with Spring Boot  don t forget to include these dependencies        lt dependency gt           lt groupId gt org springframework boot lt  groupId gt           lt artifactId gt spring-boot-starter-tomcat lt  artifactId gt           lt scope gt provided lt  scope gt       lt  dependency gt       lt dependency gt           lt groupId gt org apache tomcat embed lt  groupId gt           lt artifactId gt tomcat-embed-jasper lt  artifactId gt           lt scope gt provided lt  scope gt       lt  dependency gt    And to make a  runnable   war file  repackage it    lt build gt       lt plugins gt           lt plugin gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-maven-plugin lt  artifactId gt               lt executions gt                   lt execution gt                       lt phase gt package lt  phase gt                       lt goals gt                           lt goal gt repackage lt  goal gt                       lt  goals gt                   lt  execution gt               lt  executions gt           lt  plugin gt

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i add this shell script to convert jsp files from IS     bin sh                                                     this script file must be placed in the parent      folder of the to folders  in  and  out     in contain the input jsp files    out will containt the generated jsp files                                                      find in  -name   jsp        while read line  do          outpath  echo  line   sed -e  s in out              parentdir  echo  outpath   sed -e  s         jsp                mkdir -p  parentdir         echo  outpath           iconv -t UTF-8 -f ISO-8859-1 -o  outpath  line       done

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I had the same problem using special characters as delimiters on JSP  When the special characters got posted to the servlet  they all got messed up  I solved the issue by using the following conversion   String str   new String  request getParameter  string   getBytes   iso-8859-1     UTF-8

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This thread can help you  Passing request parameters as UTF-8 encoded strings  Basically   request setCharacterEncoding  UTF-8    String login   request getParameter  login    String password   request getParameter  password      Or you use javascript on jsp file   var userInput       myInput   val                var encodedUserInput   encodeURIComponent userInput       hiddenImput   val encodedUserInput     and after recover on class   String parameter   URLDecoder decode request getParameter  hiddenImput     UTF-8

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This is a common issue    one of the easiest way to solve is to check if the special character is reaching inside the action layer and then modifying the special character in the java code    If you are able to view this character in Action or any other java layer of your choice  Like business layer   just replace the character with corresponding HTML character using the StringEscapeUtils html escapeHtml  After doing the escape  use the new string to save to the DB

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The full JSP tag should be something like this  mind the pageEncoding too    lt    page language  java  contentType  text html  charset UTF-8  pageEncoding  UTF-8   gt    Some old browsers mess up with the encoding too  you can use the HTML tag    lt meta http-equiv  Content-Type  content  text html  charset UTF-8    gt    Also the file should be recorded in UTF-8 format  if you are using Eclipse left-click on the file- Properties- Check out - Text file encoding

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This are special characters in html  Why dont you encode it  Check it out  http   www degraeve com reference specialcharacters php

User · Answer

This will help you    lt   page contentType  text html  pageEncoding  UTF-8   gt   lt head gt   lt meta http-equiv  Content-Type  content  text html  charset UTF-8  gt   lt  head gt

[java] UTF-8 encoding in JSP page

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