自定义Ant任务

概述

自定义Ant任务必须继承Task,重写execute()
taskdef标签分析(定义任务标签)
	name		标签的名字
	classname	类包名以及类名
	classpath	类全路径
	需要注意的是,classpath是编译好的字节码文件的路径

排序intput文件输出到output文件中

FileSorter.java

package com.itlwc.ant.tools.extend;

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.Iterator;
import java.util.List;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Task;
/**
 * 自定义Ant任务必须继承Task,重写execute
 * @author Lwc
 *
 */
public class FileSorter extends Task {
	// 属性一:源文件
	private File srcFile;
	// 属性二:目标文件
	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));
			// 读
			List<String> list = new ArrayList<String>();
			String line = fromFile.readLine();
			while (line != null) {
				list.add(line);
				line = fromFile.readLine();
			}
			// 排序
			Collections.sort(list);
			// 写
			Iterator<String> iter = list.iterator();
			while (iter.hasNext()) {
				String str = iter.next();
				toFile.write(str);
				toFile.newLine();
			}
			fromFile.close();
			toFile.close();
		} catch (Exception e) {
			e.printStackTrace();
		}

	}
}

build.xml

<?xml version="1.0" encoding="UTF-8"?>
<project default="init">
	<!--定义Ant标签-->
	<taskdef name="myFileSorter" 
		classname="com.itlwc.ant.tools.extend.FileSorter" 
		classpath="WebRoot\WEB-INF\classes">
	</taskdef>
	<!--使用自定义Ant标签-->
	<target name="init">
		<myFileSorter srcFile="input.txt" destFile="output.txt">
		</myFileSorter>
	</target>
</project>