How to compare the data of Struts2 if tags

How to compare the data of Struts2 if tags, in view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and easy way.

In the Struts2 if tag, you can use test "xxx==value" to compare values directly, which is the same as the if semantics of java, but note that the = = here is not the same as the = = in java. In the Struts2 if tag will intelligently determine the type of xxx, whether it is int,double or String type, you can directly write the value as the value we want to compare. Please look at the following code.

< ?xml:namespace prefix = s />

< s:if test="deptType==1">

< /s:if>

< s:if test="deptType==1">

Xml code

< /s:if>

< s:if test="deptType==1">

< s:if test="strValue=='value'">

String comparison

< /s:if>

< s:if test="intValue==3">

Int comparison

< /s:if>

< s:if test="doubleValue==1.23">

Double comparison

< s:if test="strValue=='value'">

String comparison

< /s:if>

< s:if test="intValue==3">

Int comparison

< /s:if>

< s:if test="doubleValue==1.23">

Double comparison

< /s:if>

There is no experiment with direct comparisons of objects, but direct comparisons of objects are rarely used on jsp pages. When comparing strings, put single quotation marks after them.

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