在命令行中使用javac进行编译时出现“package javax.inject不存在”错误

Question

I'm making my first steps toward learning JSF. I found this interesting book called "Core JavaServer Faces Third Edition".

Trying to compile the first example, you can download the source code from: http://horstmann.com/corejsf/ . When I type the following on the command-line

javac UserBean.java

I get errors:

package javax.inject does not exist
package javax.enterprise.context doe not exist

I have downloaded Java EE, Ant and GlassFish.

Here is a snap of my command-line:

C:\JSF-Tutorial\corejsf3-examples\javaee\ch01\login\src\java\com\corejsf>javac UserBean.java
UserBean.java:4: error: package javax.inject does not exist
import javax.inject.Named;
                   ^
UserBean.java:6: error: package javax.enterprise.context does not exist
import javax.enterprise.context.SessionScoped;
                               ^
UserBean.java:9: error: cannot find symbol
@Named("user") // or @ManagedBean(name="user")
 ^
  symbol: class Named
UserBean.java:10: error: cannot find symbol
@SessionScoped
 ^
  symbol: class SessionScoped
4 errors

C:\JSF-Tutorial\corejsf3-examples\javaee\ch01\login\src\java\com\corejsf>

Been googling how to compile a Java EE application for the last week but without anything useful.

Would someone help me with this please, I need to solve this so I can move forward in my task to learn JSF.

SP: I want to learn to compile Java EE applications bare hands before moving to compiling my Java EE projects with NetBeans. I prefer to learn to work with GlassFish first then maybe latter I'll consider Tomcat.

One more question; what's the difference between using Java EE and the GlassFish server to deploy my applications?

Answer 1

You need to include the JAR file containing those classes in the compile time classpath.

In your particular case with the GlassFish server, that's the /glassfish/lib/javaee.jar . You can specify the classpath as -cp (or -classpath ) argument of javac command. It is a semicolonseparated string of disk file system paths pointing to JAR files and/or class folders which should be included in the compile time classpath.

javac -cp /path/to/glassfish/lib/javaee.jar UserBean.java

javac will then look in there once it encounters an unknown class which is referenced by import , so that it can among others verify if you used it the right way.

This has technically nothing to do with Java EE. This is just basic Java. I'd suggest to learn that first before diving into Java EE.

In case you're using an IDE, then it's just a matter of attaching the target server as "Targeted Runtime" to the project. The IDE will then automatically do all magic as to the build path (the compile time classpath).

Answer 2

在netbeans 7.3中，您可以右键单击项目查看器中的libraries文件夹，选择“添加库”选项，然后从列表中选择“Java EE 6 API库”。

Answer 3

In NetBeans IDE 8.0 it's slightly different than described above for version 7.3

1. Right click on Libraries in Java EE your project
2. Select Import...
3. Choose either Java EE 6 API Library or Java EE 7 API Library depending on the version you're using.
4. Click the Import Library button
5. Select the library you just imported and press the Add Library button.