RestTemplate API

实现服务间远程调用

一 postForObject

第一步在GoodsController里添加方法

@PostMapping("save")
public HashMap save(@RequestBody Goods goods) {
    System.out.println(goods);
    return new HashMap() {
        {
            put("code", 200);
            put("msg", "goods save  success");
        }
    };
}

第二步ordercontroller添加方法

@RequestMapping("test")
public String test() {
    String serverName = "cloud-goods";
    String url = "http://" + serverName + "/goods/save";

    Goods goods = new Goods("华为",1);
    HashMap hashMap = restTemplate.postForObject(url, goods, HashMap.class);
    System.out.println(hashMap);
    return "success";
}

结果访问：localhost:9002/order/test ,测试是否成功

二 ForEntity

postForEntity

@RequestMapping("/test1")
public String test1() {
    String serverName = "cloud-goods";
    String url = "http://" + serverName + "/goods/save";

    Goods goods = new Goods("华为",1);
    ResponseEntity<HashMap> result = restTemplate.postForEntity(url, goods, HashMap.class);
    //拿结果数据的API（响应数据）
    System.out.println(result.getBody());
    //拿一些响应状态码
    System.out.println(result.getStatusCode());
    return "success";
}

结果访问：localhost:9002/order/test1

getForEntity

@RequestMapping("/test2")
public Map test2() {
    //远程调用cloud-good服务，获取goods信息，发送http请求（httpclient）=> resttemplate
    String serverName = "cloud-goods";
    String url = "http://" + serverName + "/goods/findById/1";
    ResponseEntity<Goods> result = restTemplate.getForEntity(url, Goods.class);

    System.out.println(result.getBody());
    System.out.println(result.getStatusCode());
    //2.保存订单
    System.out.println("保存成功");
    return new HashMap() {
        {
            put("code", "200");
            put("msg", "success");
        }
    };

}

结果访问：localhost:9002/order/test2