eclipse 中使用 ant 自动构建 测试

主要关于直接在eclipse中使用ant 的build.xml 自动完成测试的时候遇到的问题。

Buildfile: C:Documents and SettingsAdministratorworkspacejsbuild.xml
compile:
test:

BUILD FAILED
C:Documents and SettingsAdministratorworkspacejsbuild.xml:33: Could not create task or type of type: junit. 不能创建junit task任务

Ant could not find the task or a class this task relies upon.

This is common and has a number of causes; the usual
solutions are to read the manual pages then download and
install needed JAR files, or fix the build file:
- You have misspelt 'junit'.
Fix: check your spelling.
- The task needs an external JAR file to execute
and this is not found at the right place in the classpath.
Fix: check the documentation for dependencies.
Fix: declare the task.
- The task is an Ant optional task and the JAR file and/or libraries
implementing the functionality were not found at the time you
yourself built your installation of Ant from the Ant sources.
Fix: Look in the ANT_HOME/lib for the 'ant-' JAR corresponding to the
task and make sure it contains more than merely a META-INF/MANIFEST.MF.
If all it contains is the manifest, then rebuild Ant with the needed
libraries present in ${ant.home}/lib/optional/ , or alternatively,
download a pre-built release version from apache.org
- The build file was written for a later version of Ant
Fix: upgrade to at least the latest release version of Ant
- The task is not an Ant core or optional task
and needs to be declared using .
- You are attempting to use a task defined using
or but have spelt wrong or not
defined it at the point of use

Remember that for JAR files to be visible to Ant tasks implemented
in ANT_HOME/lib, the files must be in the same directory or on the
classpath

Please neither file bug reports on this problem, nor email the
Ant mailing lists, until all of these causes have been explored,
as this is not an Ant bug.

Total time: 797 milliseconds

The Ant task is an optional task and this is the standard Ant error message when Ant cannot find the supporting code for an optional task. Ant includes support for the tasks themselves, but not the internal code that actually does the work.

So you need to find a copy of junit.jar, the code that does JUnit work, and tell Ant where it is.

The easiest way to do this is to go to Window --> Preferences, Ant --> Runtime.

In the Classpath tab click on Global Entries and then Add External JARs....

Eclipse already has a copy of JUnit, so in the dialog find your Eclipse plugins directory ([ECLIPSE_DIR]/plugins/) and go to the JUnit plugin (presently org.junit_3.8.1) and select junit.jar. Now all of your Ant scripts will know how to do the Ant task.

这样设置，就可以在eclipse 里面ant build配置中任意使用junit任务