Stringlength validation problem for utf-8 chars (Struts 2.1.6)
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Key: WW-3119
URL: https://issues.apache.org/struts/browse/WW-3119
Project: Struts 2
Issue Type: Bug
Components: Core Interceptors
Affects Versions: 2.1.6
Environment: Win XP, Eclipes, Tomcat
Reporter: Qunhuan Mei
Priority: Critical
When I try to validate utf-8 chars such as Chinese using Struts 2.1.6, the
stringlength validation appears to have problem. It seems the validation
process is not using the number of Chinese chars before encoding, but rather
the number of chars after encoding. The following are the steps to reproduce
the problem:
1. Create a project by importing struts2-blank-2.1.6.war from
...\struts-2.1.6\apps"
and make the login.jsp work with Login.java, e.g. print out the
username.length() in setUsername(...) function.
2. copy the following stringlength validation code into
Login-validation.xml:
<field-validator type="stringlength">
<param name="maxLength">4</param>
<param name="trim">true</param>
<message key="fieldNameShouldBeWithinMaxLength"/>
</field-validator>
3. copy the following stringlength error message into package.properties:
fieldNameShouldBeWithinMaxLength=The max number of chars of
${getText(fieldName)} is ${getText(maxLength)}
4. run the login.jsp and type in either "abcd" and "abcde" into username,
we can see that "abcd" does not incur a validation message whereas "abcde" does.
5. now typing 2 Chinese chars, say "世界"into the user name, which should
not have any problem since only 2 chars. However the struts reports the chars
received are more than 4. As a matter of fact, the print out statement in
setUsername(...) reports the number of chars is 6.
Qunhuan Mei
BTW: is there any way to access the validation code from struts 2.1.7 (this bug
may have been fixed by the 2.1.7 code)? Thanks.
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