java统计字符串单词的个数

在一些项目中可能需要对一段字符串中的单词进行统计，我在这里写了一个简单的demo，有需要的同学可以拿去看一下。

本人没怎么写个播客，如果有啥说的不对的地方，欢迎大家指正。

查询指定字符串出现次数可以直接使用：StringUtils.countMatches(str, sub)

统计所有单词出现次数代码：

        /**
         * 统计各个单词出现的次数
         * @param text
         */
        public static void findEnglishNum(String text){
            //找出所有的单词
            String[] array = {".", " ", "?", "!"};
            for (int i = 0; i < array.length; i++) {
                text = text.replace(array[i],",");
            }
            String[] textArray = text.split(",");  

            //遍历 记录
            Map<String, Integer> map = new HashMap<String, Integer>();
            for (int i = 0; i < textArray.length; i++) {
                String key = textArray[i];
                //转为小写
                String key_l = key.toLowerCase();
                if(!"".equals(key_l)){
                    Integer num = map.get(key_l);
                    if(num == null || num == 0){
                        map.put(key_l, 1);
                    }else if(num > 0){
                        map.put(key_l, num+1);
                    }
                }
            }
            //输出到控制台
            System.out.println("各个单词出现的频率为：");
            Iterator<String> iter = map.keySet().iterator();
            while(iter.hasNext()){
                String key = iter.next();
                Integer num = map.get(key);
                System.out.println(key + "\n\t\t" + num + "次\n-------------------");
            }
        }  

测试代码：

    public static void main(String[] args) {
            String text = "Welcome welcome to ADempiere, a commons-based peer-production of Open Source ERP Applications. This Wiki is for the global community to contribute and share know-how and domain expertise. We hope you can find as much open information and participate in making it most usable for everyone. This project has a bazaar of Citizens with a Community Council Team which work in theFunctional Team and Technical Team along the Software Development Procedure supported and funded by the foundation ADempiere";  

            findEnglishNum(text);          }  

运行结果：

后面还有一些没有全部截下来

本人代码功力不够深厚，如果代码中有什么不对或不好的地方，欢迎各位大神指点！