I have found a solution :-) !
After a little investigation in the displaytag source code, I can say there
is no way to export a CSV file encoded with a different charset from the
JSP.
But I make it possible with the help of this little path :
First I have written a custom Excel specific CSV view extending the default
one as following :
ExcelCSVView class :
--------------------------------------
package org.displaytag.export;
import java.io.IOException;
import java.io.Writer;
import javax.servlet.jsp.JspException;
import org.apache.commons.lang.StringUtils;
public class ExcelCSVView extends CsvView {
public String getRowEnd() {
return "\r\n"; //Windows end of line
}
public String getCellEnd() {
return ";"; //Excel default cell separator (for french)
}
public String getMimeType() {
return "text/csv; charset=cp1252"; //uses the Windows Latin-1
superset
encoding
}
protected String escapeColumnValue(Object value) {
String stringValue = StringUtils.trim(value.toString());
if (!StringUtils.containsNone(stringValue, new char[]{'\n', ';'
})) {
//double '"' as escape sequence for included quote
symbols
return "\"" + StringUtils.replace(stringValue, "\"",
"\"\"") + "\"";
}
return stringValue;
}
}
------------------------------------
and then, I have added this line in my "displaytag.properties" file :
export.csv.class=org.displaytag.export.ExcelCSVView
and patched the org.displaytag.filter.ExportDelegate class as following :
--- 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; //$NON-NLS-1$
}
That's all.
--Frantz
--
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