一、在app.module.ts模块中，注入JsonpModule模块

import {JsonpModule} from "@angular/http";

@NgModule({

imports: [

JsonpModule //注入JSonpModule模块

]

})

二、创建服务httpService，并注入jsonp和map(分装好的服务 可以直接调用)

import {Injectable} from '@angular/core';

import {Jsonp, URLSearchParams} from "@angular/http";

@Injectable()

export class HttpService {

private jsonpTimes = 0; // 用于记录jsonp请求的次数

constructor(private jsonp: Jsonp) {

}

jsonpGet(apiURL, req){

let params = new URLSearchParams();

//设置参数

for (let key in req) {

params.set(key, req[key]);

}

params.set('format', 'json');

params.set("callback", `__ng_jsonp__.__req${this.jsonpTimes}.finished`);

this.jsonpTimes++;

let request = this.jsonp.get(apiURL, { search: params })

.map((res) => {

let response = res.json();

return response;

});

return request;

}

}

三、业务组件调用httpService

let newUrl = localServer + "/search"; //查询网址

let req = { id: 123, name: "abc" }; //查询参数

this.httpService.jsonpGet(newUrl, req).subscribe(data => {

let result = data.data;

});

后端JAVA代码

@RequestMapping(value = "mergeJson")

public void exchangeJson(HttpServletRequest request,HttpServletResponse response) throws Exception {

String businessnum = request.getParameter("businessnum");

String paths = request.getParameter("paths");

List pathList = Arrays.asList( paths.split(","));

List resultPath = mergeService.merge(businessnum, pathList);

String return_JSONP = String.join(",", resultPath);

String jsonCallback = request.getParameter("callback"); //jsonpCallback 客户端请求参数

Map map = new HashMap<>();

map.put("data",return_JSONP);

JSONObject resultJSON = new JSONObject(map);//根据需要拼装json

PrintWriter pw = response.getWriter();

pw.write(jsonCallback+"("+resultJSON+")");

pw.close();

pw = null;

}

参考资料：https://www.cnblogs.com/minigrasshopper/p/7692368.html

希望与广大网友互动？？

点此进行留言吧！