Patch to allow displaytag users to specify the target encoding of export files
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Key: DISPL-471
URL: http://jira.codehaus.org/browse/DISPL-471
Project: DisplayTag
Issue Type: New Feature
Components: Export
Reporter: Frantz DEGRIGNY
It will be very useful to permit to the displaytag users to choose for the
export files a different encoding than the JSP page.
This will solve many national characters problems (as MS Excel cannot read
UTF-8 encoded files, for example).
This can be simply done with an ExportDelegate little patch which permits the
user to specify the traget encoding in the getMimeType() method of a custom
ExportView implementation. :
example :
public class ExcelCsvView extends CsvView {
public String getMimeType() {
return "text/csv; charset=cp1252"; //uses the Windows Latin-1
superset encoding
}
}
ExportDelegate patch :
--- ExportDelegate.java
+++ ExportDelegate.java
@@ -112,124 +112,131 @@
String characterEncoding = wrapper.getCharacterEncoding();
String wrappedContentType = wrapper.getContentType();
if (wrappedContentType != null &&
wrappedContentType.indexOf("charset") > -1)
{
// charset is already specified (see #921811)
characterEncoding =
StringUtils.substringAfter(wrappedContentType, "charset=");
}
+ //the target encoding is already specified in contentType :
+ if( contentType.indexOf("charset") > -1)
+ {
+ characterEncoding=StringUtils.substringAfter(contentType,
"charset=");
+ contentType = contentType.substring(0,
contentType.indexOf(';')).trim();
+ }
+
if (characterEncoding != null && contentType.indexOf("charset") == -1)
//$NON-NLS-1$
{
contentType += "; charset=" + characterEncoding; //$NON-NLS-1$
}
A better solution (but a little more complicated) is to allow the encoding
specification with a taglib table property like this :
<display:setProperty name="export.csv.encoding" value="cp1252"/> (But I haven't
found how to do this).
Frantz D.
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