key1=value1&key2=value变成{key1:value1,key2:value2}

// /api/user?name=Tina&password=123变成{name: 'Tina', password: '123'}name: "Tina"password: "123"
// 根据url获取query参数
const getQuery = (url) => {
    console.log(url);    //  /api/user?name=Tina&password=123
    let index = url.indexOf('?')
    if (index !== -1) {
        const queryStrArr = url.substr(index + 1).split('&')
        console.log(queryStrArr);   //['name=Tina', 'password=123']
        let object = new Object();
        for (var i = 0; i < queryStrArr.length; i++) {
            const itemArr = queryStrArr[i].split('=')
            console.log(itemArr)  //['name', 'Tina']    //['password', '123']
            object[itemArr[0]] = itemArr[1]
        }
        console.log(object, 'object')//{name: 'Tina', password: '123'}
        return object
    }
}
getQuery('/api/user?name=Tina&password=123')