JS替换地址栏参数值

首先，页面引入JS代码片段（整体复制粘贴即可）：

var Query=function(a){"use strict";var b=function(a){var b=[],c,d,e,f;if(typeof a=="undefined"||a===null||a==="")return b;a.indexOf("?")===0&&(a=a.substring(1)),d=a.toString().split(/[&;]/);for(c=0;c<d.length;c++)e=d[c],f=e.split("="),b.push([f[0],f[1]]);return b},c=b(a),d=function(){var a="",b,d;for(b=0;b<c.length;b++)d=c[b],a.length>0&&(a+="&"),a+=d.join("=");return a.length>0?"?"+a:a},e=function(a){a=decodeURIComponent(a),a=a.replace("+"," ");return a},f=function(a){var b,d;for(d=0;d<c.length;d++){b=c[d];if(e(a)===e(b[0]))return b[1]}},g=function(a){var b=[],d,f;for(d=0;d<c.length;d++)f=c[d],e(a)===e(f[0])&&b.push(f[1]);return b},h=function(a,b){var d=[],f,g,h,i;for(f=0;f<c.length;f++)g=c[f],h=e(g[0])===e(a),i=e(g[1])===e(b),(arguments.length===1&&!h||arguments.length===2&&!h&&!i)&&d.push(g);c=d;return this},i=function(a,b,d){arguments.length===3&&d!==-1?(d=Math.min(d,c.length),c.splice(d,0,[a,b])):arguments.length>0&&c.push([a,b]);return this},j=function(a,b,d){var f=-1,g,j;if(arguments.length===3){for(g=0;g<c.length;g++){j=c[g];if(e(j[0])===e(a)&&decodeURIComponent(j[1])===e(d)){f=g;break}}h(a,d).addParam(a,b,f)}else{for(g=0;g<c.length;g++){j=c[g];if(e(j[0])===e(a)){f=g;break}}h(a),i(a,b,f)}return this};return{getParamValue:f,getParamValues:g,deleteParam:h,addParam:i,replaceParam:j,toString:d}},Uri=function(a){"use strict";var b=!1,c=function(a){var c={strict:/^(?:([^:/?#]+):)?(?://((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:/?#]*)(?::(d*))?))?((((?:[^?#/]*/)*)([^?#]*))(?:?([^#]*))?(?:#(.*))?)/,loose:/^(?:(?![^:@]+:[^:@/]*@)([^:/?#.]+):)?(?://)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:/?#]*)(?::(d*))?)(((/(?:[^?#](?![^?#/]*.[^?#/.]+(?:[?#]|$)))*/?)?([^?#/]*))(?:?([^#]*))?(?:#(.*))?)/},d=["source","protocol","authority","userInfo","user","password","host","port","relative","path","directory","file","query","anchor"],e={name:"queryKey",parser:/(?:^|&)([^&=]*)=?([^&]*)/g},f=c[b?"strict":"loose"].exec(a),g={},h=14;while(h--)g[d[h]]=f[h]||"";g[e.name]={},g[d[12]].replace(e.parser,function(a,b,c){b&&(g[e.name][b]=c)});return g},d=c(a||""),e=new Query(d.query),f=function(a){typeof a!="undefined"&&(d.protocol=a);return d.protocol},g=null,h=function(a){typeof a!="undefined"&&(g=a);return g===null?d.source.indexOf("//")!==-1:g},i=function(a){typeof a!="undefined"&&(d.userInfo=a);return d.userInfo},j=function(a){typeof a!="undefined"&&(d.host=a);return d.host},k=function(a){typeof a!="undefined"&&(d.port=a);return d.port},l=function(a){typeof a!="undefined"&&(d.path=a);return d.path},m=function(a){typeof a!="undefined"&&(e=new Query(a));return e},n=function(a){typeof a!="undefined"&&(d.anchor=a);return d.anchor},o=function(a){f(a);return this},p=function(a){h(a);return this},q=function(a){i(a);return this},r=function(a){j(a);return this},s=function(a){k(a);return this},t=function(a){l(a);return this},u=function(a){m(a);return this},v=function(a){n(a);return this},w=function(a){return m().getParamValue(a)},x=function(a){return m().getParamValues(a)},y=function(a,b){arguments.length===2?m().deleteParam(a,b):m().deleteParam(a);return this},z=function(a,b,c){arguments.length===3?m().addParam(a,b,c):m().addParam(a,b);return this},A=function(a,b,c){arguments.length===3?m().replaceParam(a,b,c):m().replaceParam(a,b);return this},B=function(){var a="",b=function(a){return a!==null&&a!==""};b(f())?(a+=f(),f().indexOf(":")!==f().length-1&&(a+=":"),a+="//"):h()&&b(j())&&(a+="//"),b(i())&&b(j())&&(a+=i(),i().indexOf("@")!==i().length-1&&(a+="@")),b(j())&&(a+=j(),b(k())&&(a+=":"+k())),b(l())?a+=l():b(j())&&(b(m().toString())||b(n()))&&(a+="/"),b(m().toString())&&(m().toString().indexOf("?")!==0&&(a+="?"),a+=m().toString()),b(n())&&(n().indexOf("#")!==0&&(a+="#"),a+=n());return a},C=function(){return new Uri(B())};return{protocol:f,hasAuthorityPrefix:h,userInfo:i,host:j,port:k,path:l,query:m,anchor:n,setProtocol:o,setHasAuthorityPrefix:p,setUserInfo:q,setHost:r,setPort:s,setPath:t,setQuery:u,setAnchor:v,getQueryParamValue:w,getQueryParamValues:x,deleteQueryParam:y,addQueryParam:z,replaceQueryParam:A,toString:B,clone:C}},jsUri=Uri;

使用方法：

// 这个是原URL
var sourceUrl = "www.baidu.com?keyword=关键字";
// 调用方法生成新的URL
var newUrl = new Uri(sourceUrl).replaceQueryParam("keyword", "这个是替换后的新地址")
// 效果展示
alert(newUrl.toString());

执行效果：

方法解读：new Uri("原URL地址").replaceQueryParam("参数KEY", "要替换的值");

就是这么简单哦。不用再判断地址栏是否包涵"?"啊，然后获取参数、切割、循环一大堆复杂逻辑，2行代码搞定，可以当做工具类使用。

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