基础Java练习17：清洗网址中的垃圾字符

> 
public class Example007 {
    public static void main(String[] args) throws IOException {
        String url;
        String strGarbage; // 垃圾字符串
        BufferedReader br =new BufferedReader(new InputStreamReader(System.in));

        System.out.print("请原始输入url: ");
        url = br.readLine();

        // 清洗网址的空格字符
        url = url.replace(" ","");
        //  清洗网址中的$符号
        url = url.replace("$","");
        //  清洗网址中的%符号
        url = url.replace("%","");
        //  清洗网址中的#符号
        url = url.replace("#","");

        System.out.print("清洗后的url: " + url);
    }
}

• 改进程序，垃圾字符由用户指定

public class Example007 {
    public static void main(String[] args) throws IOException {
        String url;
        String strGarbage; // 垃圾字符串
        BufferedReader br =new BufferedReader(new InputStreamReader(System.in));

        System.out.print("请原始输入url: ");
        url = br.readLine();
        System.out.print("请输入垃圾字符串： ");
        strGarbage = br.readLine();

        // 遍历垃圾字符串
        for (int i = 0; i < strGarbage.length(); i++) {
            // 逐个清洗垃圾字符串里的每个字符
            url = url.replace(String.valueOf(strGarbage.charAt(i)),"");
        }

        System.out.print("清洗后的url: " + url);
    }
}