java开发功能中会有需要发起请求调用外部的系统。系统运维过程中，有大批量数据需要调用指定的接口修改数据，java代码样例如下：
使用POST方式调用；
public static void main(String[] args) {
RestTemplate restTemplate = new RestTemplate();
// 解决中文乱码
restTemplate.getMessageConverters().set(1,new StringHttpMessageConverter(StandardCharsets.UTF_8));
// 构建请求头
HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.setBearerAuth("tokenString");
requestHeaders.setContentType(MediaType.APPLICATION_JSON);
// 入参为json体
String reqJsonStr = "{\"code\":\"testCode\", \"group\":\"testGroup\",\"content\":\"testContent\", \"order\":1}";
HttpEntity<String> requestEntity = new HttpEntity<>(null, requestHeaders);
// 发起请求
ResponseEntity<String> json =restTemplate.exchange("https://xxx1/yyy1/zzz1/postmethod?userId=12345", HttpMethod.GET, requestEntity,String.class);
System.out.println(json);
}
使用GET方式调用：
public static void main(String[] args) {
RestTemplate restTemplate = new RestTemplate();
restTemplate.getMessageConverters().set(1,new StringHttpMessageConverter(StandardCharsets.UTF_8));
HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.setBearerAuth("tokenString");
HttpEntity<String> requestEntity = new HttpEntity<>(null, requestHeaders);
ResponseEntity<String> json =restTemplate.exchange("https://xxx2/yyy2/zzz2/gettmethod?userId=12345", HttpMethod.GET, requestEntity,String.class);
}
