regex-JAVA正則表達式替換，替換不成功

JAVA正則表達式替換，替換不成功

str = "D:\code\erp\target\class\artifacts\erp_war_exploded\/attachment/image/seal/4//5858.png"
我想把str的\/和//都替換成/
String REGEX = "\/|//";
Pattern p = Pattern.compile(REGEX);
Matcher m = p.matcher(str);
str=m.replaceAll("/");

這樣寫為什麼不行？？該怎麼搞？

最佳回答：

     String str ="D:\\code\\erp\\target\\class\\artifacts\\erp_war_exploded\\/attachment/image/seal/4//5858.png";
     System.out.println(str);
        //   我想把str的\/和//都替換成/
    String REGEX = "\\\\/|//";
    Pattern p = Pattern.compile(REGEX);
    Matcher m = p.matcher(str);
    str=m.replaceAll("/");
    System.out.println(str);

        運行結果：
        D:\code\erp\target\class\artifacts\erp_war_exploded\/attachment/image/seal/4//5858.png
  D:\code\erp\target\class\artifacts\erp_war_exploded/attachment/image/seal/4/5858.png