AngularJS實現跨域請求跨域，前端開發中經常遇到的問題，AngularJS實現跨域方式類似于Ajax，使用CORS機制。下面闡述一下AngularJS中使用$http實現跨域請求數據。AngularJS XMLHttpRequest：$http用于讀取遠程服務器的數據$http.post(url, data, [config]).success(function(){ ... });

$http.get(url, [config]).success(function(){ ... });

$http.get(url, [config]).success(function(){ ... });

一、$http.jsonp【實現跨域】1. 指定callback和回調函數名，函數名為JSON_CALLBACK時，會調用success回調函數，JSON_CALLBACK必須全為大寫。2. 指定其它回調函數，但必須是定義在window下的全局函數。url中必須加上callback。

二、$http.get【實現跨域】1. 在服務器端設置允許在其他域名下訪問response.setHeader("Access-Control-Allow-Origin", "*"); //允許所有域名訪問

response.setHeader("Access-Control-Allow-Origin", "http://www.123.com"); //允許www.123.com訪問2. AngularJS端使用$http.get()

三、$http.post【實現跨域】1. 在服務器端設置允許在其他域名下訪問，及響應類型、響應頭設置response.setHeader("Access-Control-Allow-Origin", "*");

response.setHeader("Access-Control-Allow-Methods","POST");

response.setHeader("Access-Control-Allow-Headers","x-requested-with,content-type");2. AngularJS端使用$http.post()，同時設置請求頭信息$http.post('http://localhost/ajax/getAllIndustryCategoty.pt',{languageColumn:'name_eu'},{'Content-Type':'application/x-www-form-urlencoded'}).success(function(data){

$scope.industries = data;

});

四、實現方式

跨域方式一【JSONP】：方法一：$http.jsonp("http://localhost/sitesettings/getBadgeInfo.pt?jsonp=JSON_CALLBACK&siteid=137bd406").success(function(data){ ... });

// The name of the callback should be the string JSON_CALLBACK.方法二【返回值，需要使用對應callback方法接收，但如何置于$scope???】：$http.jsonp("http://localhost/sitesettings/getBadgeInfo.pt?jsonp=badgeabc&siteid=137bd406");

function badgeabc(data){ ... }public String execute() throws Exception {

String result = FAIL;

response.setHeader("", "");

SiteHandlerAction siteHandlerAction = (SiteHandlerAction)BeansFactory.getBean(SiteHandlerAction.class);

BadgeHandlerAction badgeHandlerAction = (BadgeHandlerAction)BeansFactory.getBean(BadgeHandlerAction.class);

if("".equals(siteid) || siteid == null || StringUtils.isBlank("jsonp")){

result = FAIL;

}else{

Site site = siteHandlerAction.find(siteid);

UserBadgeStatus userBadgeStatus = badgeHandlerAction.getUserBadgeStatus(site.getId());

if(userBadgeStatus != null){

result = "{\"t\":"+userBadgeStatus.getStyle()+",\"l\":"+userBadgeStatus.getSuspend_location()+",\"s\":"+site.getId()+"}";

JSONObject jsonObj = JSONObject.fromObject(result);

String json = jsonObj.toString();

result = jsonp + "(" + json + ")";

}

}

PrintWriter write = response.getWriter();

write.print(result);

write.flush();

write.close();

return NONE;

}

跨域方式二【$http.get()】：function getAdustryController($scope,$http){

$http.get('http://localhost/ajax/getAllIndustryCategoty.pt?languageColumn=name_eu').success(function(data){

$scope.industries = data;

});

}

跨域方式三【$http.post()】：function getAdustryController($scope,$http){

$http.post('http://localhost/ajax/getAllIndustryCategoty.pt',{languageColumn:'name_eu'},{'Content-Type':'application/x-www-form-urlencoded'}).success(function(data){

$scope.industries = data;

});

}// java端支持跨域請求

public String execute(){

response.setHeader("Access-Control-Allow-Origin", "*"); //允許哪些url可以跨域請求到本域

response.setHeader("Access-Control-Allow-Methods","POST"); //允許的請求方法，一般是GET,POST,PUT,DELETE,OPTIONS

response.setHeader("Access-Control-Allow-Headers","x-requested-with,content-type"); //允許哪些請求頭可以跨域

SiteHandlerAction SiteHandler = (SiteHandlerAction) BeansFactory.getBean(SiteHandlerAction.class);

Listlist = SiteHandler.getAllIndustryCategory(); //所有的分類集合

JSONArray jsonArray = JSONArray.fromObject(list); //將list轉為json

String json = jsonArray.toString(); //轉為json字符串

try {

PrintWriter write = response.getWriter();

write.print(json);

write.close();

} catch (IOException e) {

e.printStackTrace();

}

return NONE;

}

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