我不需要城市或地址，只需要州。如果可能的话，我不想进行 API 调用。优先考虑的是轻量级解决方案，最好只是 Javascript。
我有一个用户输入zipcode，我想根据邮政编码所在的州显示一段文本。我知道查找城市要复杂得多and国家，为此，诸如 USPS 公开的 API 可能是最好的。但为了仅匹配状态，也许仅在前三个数字上，解决方案（我认为）应该是简单且轻量级的。
最好是 JavaScript。 PHP 也可以工作。
美国邮政编码数据实际上足够稳定您可以在不访问 API 或数据库的情况下执行此操作，只要 State (不是城市或其他任何东西）是需要的。
这是一个轻量级 JS 解决方案，它接受邮政编码（作为字符串），确定正确的美国州，并返回州作为其两个字母的邮政缩写。
function getState(zipString) {
/* Ensure param is a string to prevent unpredictable parsing results */
if (typeof zipString !== 'string') {
console.error('Must pass the zipcode as a string.');
return;
}
/* Ensure we have exactly 5 characters to parse */
if (zipString.length !== 5) {
console.error('Must pass a 5-digit zipcode.');
return;
}
/* Ensure we don't parse strings starting with 0 as octal values */
const zipcode = parseInt(zipString, 10);
let st;
let state;
/* Code cases alphabetized by state */
if (zipcode >= 35000 && zipcode <= 36999) {
st = 'AL';
state = 'Alabama';
} else if (zipcode >= 99500 && zipcode <= 99999) {
st = 'AK';
state = 'Alaska';
} else if (zipcode >= 85000 && zipcode <= 86999) {
st = 'AZ';
state = 'Arizona';
} else if (zipcode >= 71600 && zipcode <= 72999) {
st = 'AR';
state = 'Arkansas';
} else if (zipcode >= 90000 && zipcode <= 96699) {
st = 'CA';
state = 'California';
} else if (zipcode >= 80000 && zipcode <= 81999) {
st = 'CO';
state = 'Colorado';
} else if ((zipcode >= 6000 && zipcode <= 6389) || (zipcode >= 6391 && zipcode <= 6999)) {
st = 'CT';
state = 'Connecticut';
} else if (zipcode >= 19700 && zipcode <= 19999) {
st = 'DE';
state = 'Delaware';
} else if (zipcode >= 32000 && zipcode <= 34999) {
st = 'FL';
state = 'Florida';
} else if ( (zipcode >= 30000 && zipcode <= 31999) || (zipcode >= 39800 && zipcode <= 39999) ) {
st = 'GA';
state = 'Georgia';
} else if (zipcode >= 96700 && zipcode <= 96999) {
st = 'HI';
state = 'Hawaii';
} else if (zipcode >= 83200 && zipcode <= 83999 && zipcode != 83414) {
st = 'ID';
state = 'Idaho';
} else if (zipcode >= 60000 && zipcode <= 62999) {
st = 'IL';
state = 'Illinois';
} else if (zipcode >= 46000 && zipcode <= 47999) {
st = 'IN';
state = 'Indiana';
} else if (zipcode >= 50000 && zipcode <= 52999) {
st = 'IA';
state = 'Iowa';
} else if (zipcode >= 66000 && zipcode <= 67999) {
st = 'KS';
state = 'Kansas';
} else if (zipcode >= 40000 && zipcode <= 42999) {
st = 'KY';
state = 'Kentucky';
} else if (zipcode >= 70000 && zipcode <= 71599) {
st = 'LA';
state = 'Louisiana';
} else if (zipcode >= 3900 && zipcode <= 4999) {
st = 'ME';
state = 'Maine';
} else if (zipcode >= 20600 && zipcode <= 21999) {
st = 'MD';
state = 'Maryland';
} else if ( (zipcode >= 1000 && zipcode <= 2799) || (zipcode == 5501) || (zipcode == 5544 ) ) {
st = 'MA';
state = 'Massachusetts';
} else if (zipcode >= 48000 && zipcode <= 49999) {
st = 'MI';
state = 'Michigan';
} else if (zipcode >= 55000 && zipcode <= 56899) {
st = 'MN';
state = 'Minnesota';
} else if (zipcode >= 38600 && zipcode <= 39999) {
st = 'MS';
state = 'Mississippi';
} else if (zipcode >= 63000 && zipcode <= 65999) {
st = 'MO';
state = 'Missouri';
} else if (zipcode >= 59000 && zipcode <= 59999) {
st = 'MT';
state = 'Montana';
} else if (zipcode >= 27000 && zipcode <= 28999) {
st = 'NC';
state = 'North Carolina';
} else if (zipcode >= 58000 && zipcode <= 58999) {
st = 'ND';
state = 'North Dakota';
} else if (zipcode >= 68000 && zipcode <= 69999) {
st = 'NE';
state = 'Nebraska';
} else if (zipcode >= 88900 && zipcode <= 89999) {
st = 'NV';
state = 'Nevada';
} else if (zipcode >= 3000 && zipcode <= 3899) {
st = 'NH';
state = 'New Hampshire';
} else if (zipcode >= 7000 && zipcode <= 8999) {
st = 'NJ';
state = 'New Jersey';
} else if (zipcode >= 87000 && zipcode <= 88499) {
st = 'NM';
state = 'New Mexico';
} else if ( (zipcode >= 10000 && zipcode <= 14999) || (zipcode == 6390) || (zipcode == 501) || (zipcode == 544) ) {
st = 'NY';
state = 'New York';
} else if (zipcode >= 43000 && zipcode <= 45999) {
st = 'OH';
state = 'Ohio';
} else if ((zipcode >= 73000 && zipcode <= 73199) || (zipcode >= 73400 && zipcode <= 74999) ) {
st = 'OK';
state = 'Oklahoma';
} else if (zipcode >= 97000 && zipcode <= 97999) {
st = 'OR';
state = 'Oregon';
} else if (zipcode >= 15000 && zipcode <= 19699) {
st = 'PA';
state = 'Pennsylvania';
} else if (zipcode >= 300 && zipcode <= 999) {
st = 'PR';
state = 'Puerto Rico';
} else if (zipcode >= 2800 && zipcode <= 2999) {
st = 'RI';
state = 'Rhode Island';
} else if (zipcode >= 29000 && zipcode <= 29999) {
st = 'SC';
state = 'South Carolina';
} else if (zipcode >= 57000 && zipcode <= 57999) {
st = 'SD';
state = 'South Dakota';
} else if (zipcode >= 37000 && zipcode <= 38599) {
st = 'TN';
state = 'Tennessee';
} else if ( (zipcode >= 75000 && zipcode <= 79999) || (zipcode >= 73301 && zipcode <= 73399) || (zipcode >= 88500 && zipcode <= 88599) ) {
st = 'TX';
state = 'Texas';
} else if (zipcode >= 84000 && zipcode <= 84999) {
st = 'UT';
state = 'Utah';
} else if (zipcode >= 5000 && zipcode <= 5999) {
st = 'VT';
state = 'Vermont';
} else if ( (zipcode >= 20100 && zipcode <= 20199) || (zipcode >= 22000 && zipcode <= 24699) || (zipcode == 20598) ) {
st = 'VA';
state = 'Virginia';
} else if ( (zipcode >= 20000 && zipcode <= 20099) || (zipcode >= 20200 && zipcode <= 20599) || (zipcode >= 56900 && zipcode <= 56999) ) {
st = 'DC';
state = 'Washington DC';
} else if (zipcode >= 98000 && zipcode <= 99499) {
st = 'WA';
state = 'Washington';
} else if (zipcode >= 24700 && zipcode <= 26999) {
st = 'WV';
state = 'West Virginia';
} else if (zipcode >= 53000 && zipcode <= 54999) {
st = 'WI';
state = 'Wisconsin';
} else if ( (zipcode >= 82000 && zipcode <= 83199) || zipcode == 83414 ) {
st = 'WY';
state = 'Wyoming';
} else {
st = 'none';
state = 'none';
console.log('No state found matching', zipcode);
}
/* Return `state` for full name or `st` for postal abbreviation */
return st;
}
您可以通过返回返回州的全名，而不仅仅是两个字母的缩写state代替st在最后一行。
非常感谢 @kevin-boucher 和 @abaldwin99 帮助解析较小的新英格兰代码，并通过他们的答案避免可怕的八进制评估错误here https://stackoverflow.com/questions/31868020/why-doesnt-greater-than-or-equals-comparison-work-in-javascript.
也感谢大部分原始代码这个有用的页面 https://web.archive.org/web/20140516215340/http://forums.sugarcrm.com/f148/making-state-match-zip-us-only-61653/.
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