java类如何生成具有格式的.cfg文件

例如：#config.cfg
define server{
userName xiaoming
hostName window
alias XP
hostIP 192.168.1.1
}
define client{
userName changchun
hostName Linux
alias ubuntu
hostIP 192.168.1.2
}
define server{
userName xiaoming1
hostName window
alias XP1
hostIP 192.168.1.3
}
define client{
userName changchun1
hostName Linux
alias ubuntu1
hostIP 192.168.1.4
}
...
...

其实很简单的
[code="java"]

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;

public class CfgWriter {
private PrintWriter out;
private static final String DEFINE = "define";

public CfgWriter(File file) throws FileNotFoundException {
    super();
    this.out = new PrintWriter(file);
}

public void writeComment(String comment) {
    out.print('#');
    out.println(comment);
}

public void startDefine(String name) {
    out.print(DEFINE);
    out.print(' ');
    out.print(name);
    out.println('{');
}

public void writeProperty(String key, String value) {
    out.print(' ');
    out.print(key);
    out.print('\t');
    out.println(value);
}

public void endDefine() {
    out.println('}');
}

public void close() {
    out.close();
}

public static void main(String[] args) throws Exception {
    CfgWriter w = new CfgWriter(new File("d:/config.cfg"));
    w.writeComment("config.cfg");
    w.startDefine("Server");
    w.writeProperty("Id", "0001");
    w.writeProperty("Name", "xxxx");
    w.writeProperty("Amount", "100");
    w.endDefine();
    w.close();
}

}

[/code]

方法有好多，最直接的就是自己控制字符串的格式来写文件，就是复杂了点。
比较好的可以用模板引擎，如freemarker、velocity什么的，生成字符串再写文件。

不错，学习！