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时间旅人

问题：str.matches("word");没有效果

原因：函数matches()对整个字符串做匹配，不是找单个词

解决：改为str.match(".*\\bword\\b.*);

参考：

/** * Demonstrates how to use the String.matches() method, including * the need to match the entire string in your patterns. */public class StringMatches1{  public static void main(String[] args)  {    String stringToSearch = "Four score and seven years ago our fathers ...";        // this prints "false", because the search pattern doesn't match the     // entire string    System.out.println("Try 1: " + stringToSearch.matches("seven"));        // this prints "true" because the pattern does match the entire string     System.out.println("Try 2: " + stringToSearch.matches(".*seven.*"));  }}输出：Try 1: falseTry 2: true