1: In Java web development, the classpath and src we often say actually mean the same thing. All non-*.Java source files in the src directory will be placed in your project after compilation--> WebRoot-->WEB-INF-->classes
2: In Java Swing development, classpath also means the "environment variables" we set after installing jdk, such as:. ;%Java_HOME%\lib\dr.jar
Usually, what we call Java connecting to the database, or eclipse connecting to the database, and similar expressions, have two meanings:
A: Web application (website) developed in Java, connecting to the database
B: Desktop application (Java Swing) developed in Java, connecting to the database
For A, it is the one we are most exposed to, The detailed steps to connect to the database are as follows
a: Find your project-->WebRoot-->WEB-INF-->lib
b: Put all your *.jar Put it in this folder
c: Just refresh your project
For B, programmers who use Java Swing are definitely familiar with it. The detailed steps to connect to the database are as follows
Method (1):
◆In the eclipse menu bar, window-->preferences-->Java-->Build Path-->User Libraies-->New, enter any name , OK, -->Add JARs, select your own *.jar file
◆Your project-->right-click-->Build Path-->Add Libraies-->User Library--> ;Next step-->Select the library
OK you just created! !
Method (2):
Right-click your project, Build Path-->Add External Archves-->Select the *.jar file you want to add, OK
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