2014年去哪儿网笔试题--有两个文件context.txt和words.conf,请尝试将他们合并成为一段文字，并打印出来。

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

public class TransferWord {
    public static void main(String[] args) throws IOException {
        String path = "D://word.conf";
        String contentPath = "D://context.txt";
        FileReader con = new FileReader(contentPath);
        FileReader word = new FileReader(path);
        // 读取主文件内容
        char[] cs = new char[500];
        int len = 0;
        String contextString = null;
        while ((len = con.read(cs)) != -1) {
            contextString = new String(cs, 0, len);
            System.out.println("文本内容："+contextString);
        
        }
        con.close();
        // 配置文件注入hash
        BufferedReader br = new BufferedReader(word);
        String str;
        Map<String, String> map = new HashMap<String, String>();
        while ((str = br.readLine()) != null) {
            String pre = str.substring(0, str.indexOf("="));
            String sub = str.substring(str.indexOf("=") + 1, str.length());
            String[] arr = sub.split("：");
            if (arr.length != 1) {
                for (int i = 1; i <= arr.length; i++) {
                    map.put("$(" + pre + "." + i + ")", arr[i - 1].trim()); // 去掉首尾空格
                }
            } else {
                map.put("$(" + pre + ")", sub.trim());

            }
        }
        br.close();
        //进行替换操作
      Iterator iter=map.keySet().iterator();
      while(iter.hasNext()){
           String key=iter.next().toString();  
           String value=map.get(key);  
           if(contextString.contains(key)){  
               contextString=contextString.replace(key,value);
           }
      }
      //输出字符串
      System.out.println("新的文本内容："+contextString);
    }
}