Spring RestTemplate的使用与踩坑

@Bean
public RestTemplate restTemplate(ClientHttpRequestFactory factory) {
    RestTemplate restTemplate = new RestTemplate(factory);
    return restTemplate;
}
@Bean
public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
    SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
    factory.setReadTimeout(5000);
    factory.setConnectTimeout(15000);
    // 设置代理
    //factory.setProxy(null);
    return factory;
}

@Autowired
private RestTemplate restTemplate;

@GetMapping("send")
public String testPost(@RequestParam("code") Integer code){
    String url = "http://localhost:8888/oauth/return";
    LinkedMultiValueMap<String, Object> stringObjectLinkedMultiValueMap = new LinkedMultiValueMap<>();
    stringObjectLinkedMultiValueMap.set("code",code);
    HttpEntity<LinkedMultiValueMap<String, Object>> jsonObjectHttpEntity = new HttpEntity<>(stringObjectLinkedMultiValueMap);
    ResponseEntity<String> stringResponseEntity = restTemplate.postForEntity(url, jsonObjectHttpEntity, String.class);
    String body = stringResponseEntity.getBody();
    return body;
}
@PostMapping("return")
public String returnPost(@RequestParam Integer code){
    return "哈首府帕斯发";
}

@GetMapping("keycloak/getToken")
public String keycloakGetToken(@RequestParam Map<String,String> map){
    //String code = requestObj.getString("code");
    String url = "http://localhost:8081/auth/realms/myRealm/protocol/openid-connect/token";
    String code = map.get("code");
    System.out.println("传进来的code："+code);
    //HttpHeaders headers = new HttpHeaders();
    //JSONObject jsonObject = new JSONObject();
    //jsonObject.put("grant_type","authorization_code");
    //jsonObject.put("code",code);
    //jsonObject.put("client_id","myclient");
    //jsonObject.put("client_secret","LsvDoZ5g0BQhRDR9ydYqV9tjal8YDeAI");
    //jsonObject.put("scope","openid");
    //jsonObject.put("redirect_uri","http://localhost:8888/oauth/keycloak/getToken");
    //HttpEntity<JSONObject> jsonObjectHttpEntity = new HttpEntity<>(jsonObject,headers);
    LinkedMultiValueMap<String, Object> stringObjectLinkedMultiValueMap = new LinkedMultiValueMap<>();
    stringObjectLinkedMultiValueMap.set("grant_type","authorization_code");
    stringObjectLinkedMultiValueMap.set("code",code);
    stringObjectLinkedMultiValueMap.set("client_id","myclient");
    stringObjectLinkedMultiValueMap.set("client_secret","LsvDoZ5g0BQhRDR9ydYqV9tjal8YDeAI");
    stringObjectLinkedMultiValueMap.set("scope","openid");
    stringObjectLinkedMultiValueMap.set("redirect_uri","http://localhost:8888/oauth/keycloak/getToken");
    HttpEntity<LinkedMultiValueMap<String, Object>> jsonObjectHttpEntity = new HttpEntity<>(stringObjectLinkedMultiValueMap);
    ResponseEntity<String> responseEntity = restTemplate.postForEntity(url, jsonObjectHttpEntity, String.class);
    String body = responseEntity.getBody();
    return body;
}