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If this is for weblogic running on development mode, then you can go for auto-deployment feature where weblogic will auto-deploy modified application from autodeploy directory.
For production mode, you can go for production-redeployment feature of weblogic where it uses application versioning. So for example you deployed webapp1 with version app1.0 and then for new release you will deploy webapp1 with version app2.0 adding a retirement policy to retire old application after said time and start using webapp1 with app2.0.
Refer to link for mode detail - http://middlewaresupport.wordpress.com/2013/03/21/production-redeployment-feature-in-weblogic/
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