正则表达式使用Java String.replaceAll

发布时间：2020-12-14 06:27:15 所属栏目：百科来源：网络整理

导读：我想要替换如下的 java字符串值.下面的代码不起作用. cleanInst.replaceAll("[i]",""); cleanInst.replaceAll("[/i]",""); cleanInst.replaceAll("[//]","/"); cleanInst.replaceAll("[bPhysics Dept.b]","Physics Department"); cleanInst.replaceAll("[

我想要替换如下的 java字符串值.下面的代码不起作用.

cleanInst.replaceAll("[<i>]","");
        cleanInst.replaceAll("[</i>]","");
        cleanInst.replaceAll("[//]","/");
        cleanInst.replaceAll("[bPhysics Dept.b]","Physics Department");
        cleanInst.replaceAll("[b/nb]",";");
        cleanInst.replaceAll("[bDEPTb]","The Department");
        cleanInst.replaceAll("[bDEPT.b]","The Department");
        cleanInst.replaceAll("[bThe Dept.b]","The Department");
        cleanInst.replaceAll("[bthe dept.b]","The Department");
        cleanInst.replaceAll("[bThe Deptb]","The Department");
        cleanInst.replaceAll("[bthe deptb]","The Department");
        cleanInst.replaceAll("[bDept.b]","The Department");
        cleanInst.replaceAll("[bdept.b]","The Department");
        cleanInst.replaceAll("[bdeptb]","The Department");

实现上述替换的最简单方法是什么？

如果它是您正在使用的功能,则存在问题.每次调用都会再次编译每个正则表达式.最好将它们创建为常量.你可以有这样的东西.

private static final Pattern[] patterns = {
    Pattern.compile("</?i>"),Pattern.compile("//"),// Others
};

private static final String[] replacements = {
    "","/",// Others
};

public static String cleanString(String str) {
    for (int i = 0; i < patterns.length; i++) {
        str = patterns[i].matcher(str).replaceAll(replacements[i]);
    }
    return str;
}

（编辑：李大同）

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