Ant comes with a large number of tasks (Task), the Internet is also a large number of tasks available, but if you are facing the problems others will not mind, how should we do? In fact, if you can spend a little effort to write out their tasks. I started also did not expect such a simple (do nested tasks encountered a little problem), we can see that Ant's structural design is quite good.
Suppose we need to show that the implementation of the task and how much time to write a TimerTask
Start: the execute method of covering org.apache.tools.ant.Task
import org.apache.tools.ant.Task;
import org.apache.tools.ant.BuildException;
public class TimerTask extends Task (
public void execute () throws BuildException (
System.out.println ("I am a timer");
)
)
Note that when compiling Classpath on ant.jar must.
Simplicity, assume that java source files, class files in the same directory, in this directory to write a build.xml file:
Open Dos window to this directory, run ant
Simple enough right! If the class path is more complex or in the jar file, set the classpath attribute
Continue to: set properties
Suppose we want to add an action attribute, in the Java file:
private String action;
....
public void execute () throws BuildException (
if (action.equals ("init")) (
...
)
...
)
public String getAction () (
return action;
)
public void setAction (String string) (
action = string;
)
In the xml file:
Save the intermediate results using the Project
For this task, it must value the time saved, more appropriate is org.apache.tools.ant.Project a, Project object life cycle is the Build, and can be setProperty, getProperty methods such as save / get value.
public void execute () throws BuildException (
if (getOwningTarget () == null)
[Next]
return;
Project proj = getOwningTarget (). GetProject ();
...
/ / Can do smt with proj now
)
Promotion: Nested Task
If we want to re-nested in the Timer the following sub-tasks (if not necessary :-):
That we first of all just write a simple FooTask, and then add in the build.xml
Then add a method to TimerTask:
public void addFoo (FooTask foo) (
)
Note: addXXX of XXX in the name decided by the
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