Question

我创建了一个java webservice来返回国家/地区列表

@RequestMapping(value = "/getcountrylist", method = RequestMethod.GET, headers = "Accept=application/json")
public @ResponseBody
@ApiIgnore
Object getcountrylist(@RequestParam String pvtToken,
        @RequestParam String lan) {

    System.out.println(API_TAG + "Request recevied to get CountryList");
    System.out.println("DB:"+dbName);
    if (!this.pvtToken.equals(pvtToken)) {
        CountryList countryList = new CountryList();            
        return new ResponseEntity<CountryList>(countryList,
                HttpStatus.UNAUTHORIZED);
    }
    CountryList countryList = avlMobileAPIService.getCountryList(lan);      
    return new ResponseEntity<CountryList>(countryList, HttpStatus.OK);     

}

我需要从javascript调用上面的web服务作为JSONP，我写下面的javascript代码如下

function buttonClick(){

$.ajax({
           type: "GET",
           dataType: "jsonp",         
           crossDomain: true,
           url: "http://localhost:8080/api/getcountrylist",
             data: {pvtToken:"JXku56AE0067YtRUSAZEE",lan:"en"},
             Accept: "application/jsonp",
             jsonpCallback:  function(data, status){
                alert('callback');
                alert(data);
           },              
           success: function(data, status){
                alert('sucess');
           },


           });

}

以上函数调用webservice并返回列表，但在客户端显示“无效标签错误”。

{"countrylist":[{"countryId":"4","countryCodeAlpha2":"AF","countryCodeAlpha3":"AFG","countryName":"Afghanistan ","isdCode":"93"},{"countryId":"5","countryCodeAlpha2":"AL","countryCodeAlpha3":"ALB","countryName":"Albania ","isdCode":"355"},{"countryId":"6","countryCodeAlpha2":"DZ","countryCodeAlpha3":"DZA","countryName":"Algeria ","isdCode":"213"},{"countryId":"7","countryCodeAlpha2":"AS","countryCodeAlpha3":"ASM","countryName":"American Samoa ","isdCode":"684"}]}

我在一篇文章中发现，ajax调用需要JSONP，但返回JSON数据。

解决方案是什么？

Answer 1

提供此链接 http://www.iceycake.com/2012/06/xml-json-jsonp-web-service-endpoints-spring-3-1/

或以这种简单的方式尝试

@RequestMapping(value = "/mobile_getcountrylist", method = RequestMethod.GET, produces = {"application/x-javascript"})
    @ResponseBody   
    public Object mobile_getcountrylist( @RequestParam("callback") String jsonpCallback) {

        System.out.println(API_TAG + "Request recevied to get CountryList");    
        CountryList countryList = avlMobileAPIService.getCountryList("en");
        //countryList.setJsonCallback(jsonpCallback); 
        return convertToJsonP(countryList,jsonpCallback);
    }

    private String convertToJsonP(Object o,String jsonpCallback){
        String outputmessage=null;
        ObjectMapper mapper = new ObjectMapper();
        try {
            outputmessage=mapper.writeValueAsString(o);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        if(outputmessage!=null){
            outputmessage=jsonpCallback + "(" + outputmessage + ")";
        }
        return outputmessage;   
    }

Javascript代码

$.ajax({
        type: 'GET',
        url: 'http://localhost:8080/api/mobile_getcountrylist',
        crossDomain: true,
        async: false,
        jsonpCallback: 'jsonpCallback',
        dataType: 'jsonp',
        contentType:'application/json',
        success: function(data) {        
         alert('ok');
        }
    });

从Javascript调用Java Rest API，因为JSONP返回无效的标签错误

1 个答案: