js:

function checkOneToHundred(filed){
    var a=filed.value;
    var reg = new RegExp("^(\\d|[1-9]\\d|100)$");
    if(!reg.test(a)) {
        layer.alert("请输入0-100的整数！", {
            skin: 'layui-layer-lan' //样式类名
            ,closeBtn: 0
            ,move: false
            ,scrollbar: false
        });
    }
}

java:

import java.util.regex.Pattern;

Pattern.matches("^(\\d|[1-9]\\d|100)$", "内容");