问题
I am using Java SE with Eclipse happily but now I am going to write a "send mail" program which requires javax.mail package. I found that in Java EE so I downloaded one (180MB) and I know that Java EE installation needs SE JDK/JRE. Because I installed Java SE in c:\java\jdk1.7 (not the default path) I use -j c:\java\jdk1.7 to install Java EE. I have several questions about it.
How could I let Eclipse to load the Java EE package? Should I change the JRE in Java EE? Now Eclipse still only know the SE lib.
Do we have a JDK version which include APIs from Java EE? Because I really do not want to install two JREs in my computer and I do not need Glassfish. Can some one tell me which one I should download?
Is there
src.zipfor Java EE api? I cannot find it.
回答1:
Getting Java mail
Download Java Mail API from Oracle website.
Exctract the JARs (mailapi.jar has the desired java.mail package) and put in yout CLASSPATH by:
RightClick(project) -> properties -> Java Build Path -> Libraries
-> add Jars/Add External Jars (depends where you put your JARS)
Updating the JRE In your eclipse, use the menu options as below:
window -> preferences-> Java -> Installed JREs -> Add
Give the path as c:\java\jdk1.7 and follow the steps to complete.
Once done, JDK 1.7 will appear in the list with checkbox in front. Select the checkbox and press OK.
You should be all set, if you haven't done any project specific settings.
To verify the project specific settings, follow the steps:
RightClick(project) -> properties -> Java Build Path -> Libraries.
Your JDK 1.7 should appear in right pane.
来源：https://stackoverflow.com/questions/12773152/confusion-about-java-se-and-java-ee