实例1：实现自定义Ant任务

　　其中FileSorter文件的源码如下：

 

package com.ant.test02;
import  java .io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.ListIterator;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;
public class FileSorter extends Task {
private File srcFile;
private File destFile;
public File getSrcFile() {
return srcFile;
}
public void setSrcFile(File srcFile) {
this.srcFile = srcFile;
}
public File getDestFile() {
return destFile;
}
public void setDestFile(File destFile) {
this.destFile = destFile;
}
@Override
public void execute() throws BuildException {
try {
BufferedReader fromFile = new BufferedReader(
new FileReader(srcFile));
BufferedWriter toFile = new BufferedWriter(new FileWriter(destFile));
List<String> list = new ArrayList<String>();
String line = fromFile.readLine();
while (line != null) {
list.add(line);
line = fromFile.readLine();
}
Collections.sort(list);
for (ListIterator<String> li = list.listIterator(); li.hasNext();) {
String str = li.next();
toFile.write(str);
toFile.newLine();
}
fromFile.close();
toFile.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}