java培训之使用HttpMessageConverter

@ResponseBody  //@ResponseBody:是将内容或对象作为Http响应正文返回

@RequestMapping(“/testHttpMessageConverter”)

//@RequestBody:是将Http请求正文插入方法中，修饰目标方法的入参

public String testHttpMessageConverter(@RequestBody String body){

System.out.println(“body=”+body);

return “Hello,” + new Date();  //不再查找跳转的页面

}

/files/abc.txt    准备一个下载的文件

abc.txt

@RequestMapping(“testResponseEntity”)

public ResponseEntity testResponseEntity(HttpSession session) throws IOException{

ServletContext servletContext = session.getServletContext();

InputStream resourceAsStream = servletContext.getResourceAsStream(“/files/abc.txt”);

byte[] body = new byte[resourceAsStream.available()] ;

resourceAsStream.read(body);

MultiValueMap headers = new HttpHeaders();

headers.add(“Content-Disposition“, “attachment;filename=abc.txt”);

HttpStatus statusCode = HttpStatus.OK;

ResponseEntity responseEntity = new ResponseEntity(body, headers, statusCode);

return responseEntity ;

}