谁帮我把代码优化下
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class ExceptionSpider2 {

public static void main(String[] args) {
/*map用来存放发现的异常以及每种异常出现的次数*/
Map<String, Integer> map = new HashMap<String, Integer>();
/**/
BufferedReader br = null;
/*存放从文件中读取的数据行*/
String line = null;
/*用作map的key*/
String key = null;
/*定义正则表达式*/
Pattern p = Pattern.compile("(\\w+\\.)+\\w+\\.?Exception");
Matcher m = null;
try {
/*从源文件读取数据*/
br = new BufferedReader(new FileReader("E:\\text.log."));
while((line=br.readLine()) !=null) {
/**/
m = p.matcher(line);
/*匹配成功进行循环*/
while(m.find()) {
key = m.group();
/*判断是否包含key*/
if(map.containsKey(key)) {
/*包含key则value加1*/
map.put(key, map.get(key) + 1);
}else {
/*不包含则创建key*/
map.put(key, 1);
}
}
}
/*关闭打开的文件*/
br.close();
System.out.println("检索完毕");
System.out.println("一共发现了" + map.size() + "种异常");
/*遍历map*/
Iterator it = map.keySet().iterator();
while(it.hasNext()) {
String exception = (String) it.next();
int num = map.get(exception);
System.out.println("异常" + exception + "出现了： " + num + "次");
}

//System.out.println(map);
}catch(FileNotFoundException e) {
e.printStackTrace();
}catch(IOException e) {
e.printStackTrace();
}

}
}

从log中查询exception出现的种类以及次数。请帮我完善下或改下格式。看着挺乱。

------解决方案--------------------
我觉得代码完全正确，调整一下结果，就可以了。建议将输入流的关闭放到finally里，同时不建议采用Iterator

Java code

public class ExceptionSpider2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        
        /*map用来存放发现的异常以及每种异常出现的次数*/
        Map<String, Integer> map = readException(Thread.currentThread().getContextClassLoader()
            .getResource("text.log").getPath());
        System.out.println("检索完毕");
        System.out.println("一共发现了" + map.size() + "种异常");
        for (String exception : map.keySet()) {
            int num = map.get(exception);
            System.out.println("异常" + exception + "出现了： " + num + "次");
        }
    }
    
    public static Map<String, Integer> readException(String fileName) {
        
        Map<String, Integer> map = new HashMap<String, Integer>();
        BufferedReader br = null;
        /*用作map的key*/
        String key = null;
        /*定义正则表达式*/
        Pattern p = Pattern.compile("(\\w+\\.)+\\w+\\.?Exception");
        Matcher m = null;
        String line = null;
        try {
            /*从源文件读取数据*/
            br = new BufferedReader(new FileReader(Thread.currentThread().getContextClassLoader()
                .getResource("text.log").getPath()));
            while ((line = br.readLine()) != null) {
                m = p.matcher(line);
                /*匹配成功进行循环*/
                while (m.find()) {
                    countException(map, m.gro