题解 | #参数解析#
参数解析
https://www.nowcoder.com/practice/668603dc307e4ef4bb07bcd0615ea677
1、遍历字符串
2、将字符放入栈中，遇到空格，弹出栈
3、遇到两次引号，第二次弹出引号间的内容
4、如果第一个字符是引号，单独处理
import java.util.*;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
String cli = in.nextLine();
Stack<Character> sta = new Stack<>();
List<String> result = new ArrayList<>();
Boolean isput = true;
for(int i = 0;i<cli.length();i++){
// System.out.println("i="+i+". "+cli.charAt(i));
if(i==0){
while(cli.charAt(i)!=' '){
//进
sta.push(cli.charAt(i));
i++;
}
i--;
//出
StringBuffer sb0 = new StringBuffer();
Character tmp0;
while(sta.size()!=0){
tmp0 = sta.pop();
sb0.append(String.valueOf(tmp0));
}
result.add(sb0.reverse().toString());
}
switch(cli.charAt(i)){
case ' ':
sta.push(cli.charAt(i));
i++;
if(cli.charAt(i)=='"'){
sta.push(cli.charAt(i));
i++;
while(cli.charAt(i)!='\"'){
//进
sta.push(cli.charAt(i));
i++;
}
//出
StringBuffer sb = new StringBuffer();
Character tmp;
while( i<cli.length()&&(tmp = sta.pop()) !='\"'){
if(String.valueOf(tmp)!="\""){
sb.append(String.valueOf(tmp));
}
}
result.add(sb.reverse().toString());
continue;
}
while(i<cli.length()&&cli.charAt(i)!=' '){
//进
sta.push(cli.charAt(i));
i++;
}
i--;
//出
StringBuffer sb2 = new StringBuffer();
Character tmp2;
while( (tmp2 = sta.pop()) !=' '){
sb2.append(String.valueOf(tmp2));
}
result.add(sb2.reverse().toString());
continue;
}
}
System.out.println(result.size());
result.forEach(System.out::println);
}
}
