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http://jdbc.postgresql.org/download.html
Configuration Tomcat
We have to do 5 8 steps :
1. When we downloads, we must extract Tomcat 7
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and we change this vers for <Host name="localhost" appBase="webapps" unpackWARs="truefalse" autoDeploy="truefalse">
8. Next we need open webapps and we find folder ROOT, we open this folder and we delete all files and folder that are in ROOT folder, next we back in webapps in Tomcat,
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