WIX-MSI：如何从系统中的多个JRE版本（1,8、1.7.0_80、1.7.0_79和1.6.0_45）检查jre 1.7的最高版本-直到1.6

Question

How can I check highest version of 1.7 JRE installed in the system by using WIX? 1) My application works for only 1.6 or 1.7 of JRE's. 2) So during MSI installation need to find our highest version of 1.7 or 1.6. a) If in the system it has installed 1.8.0_45, 1.7.0_80, 1.7.0_79 and 1.6.0_45. In this case I have to find out the 1.7.0_80 and need to get the installed path.

As I know below way we can find out the highest version of the JAVA installed in the system.

 <Property Id="JRE_64">
        <RegistrySearch Id="JRE_64R" Root="HKLM"    Key="SOFTWARE\JavaSoft\Java Runtime Environment" Name="CurrentVersion"    Type="raw" Win64="yes"  />
  </Property> 

Based on this value checking is it 1.8 of JAVA, then need to get 1.7

<?if [JRE_64] < 1.6 AND  [JRE_64] >= 1.8 ?> 
        <Property Id="JRE_64_7">
            <RegistrySearch Id="JRE_64R_7" Root="HKLM" Key="SOFTWARE\JavaSoft\Java Runtime Environment" Name="Java7FamilyVersion" Type="raw" Win64="yes"  />
        </Property> 
        <?if ([JRE_64_7]  >= 1.7  AND  [JRE_64_7] < 1.8) ?>
            <Property Id="JRE_64_6">
                <RegistrySearch Id="JRE_64R_6" Root="HKLM" Key="SOFTWARE\JavaSoft\Java Runtime Environment" Name="Java6FamilyVersion" Type="raw" Win64="yes"  />
            </Property> 
        <?endif?>
    <?endif?>

But this if condition is not working for Property value comparison ? How can I solve it? any suggestion please.

Answer 1

try custom action, include a vbs binary try to use wmi object and fetch the properties of Java family

Set objWMIService = GetObject("winmgmts:{impersonationLevel=impersonate}!\\.\root\cimv2")

Set allProds= objWMIService.ExecQuery("SELECT Name,Vendor,Version FROM Win32_Product")

Iterate through the allProds, if name is java check for version

Sample Response

Version=6.0.100

Vendor=Sun Microsystems, Inc.

Name=Java(TM) 6 Update 10