java 的String的substring方法应用示例

public class StringBufferSubStringTest {
    public static void main(String[] args) {
        StringBuffer sb = new StringBuffer();
        sb.append("张三,");
        sb.append("张三1,");
        sb.append("张三2,");
        System.out.println(sb.substring(0,sb.length()-1));
    }
}

张三,张三1,张三2