前端数据到后端----从request里取数据

最新推荐文章于 2025-09-16 10:38:19 发布

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本文介绍了一种在Spring框架中遇到的问题，即POST请求的Body部分无法正确接收的情况，并给出了具体的解决办法。通过在@RequestMapping注解中设置Content-type属性为text/plain，成功解决了Body为空的问题。

1. 参数放在request的header上：request.getParameter() / request.getParameter()

2. 参数放在request的body上：

@RequestMapping(value = "/XXXX", method = RequestMethod.POST, headers = "Content-type=text/plain")

@ResponseBody

public HashMap dataCenterEntry(final HttpServletRequest request){

String body =null;
try {
body = StreamUtils.copyToString(request.getInputStream(), Charset.forName("utf-8"));
} catch (IOException e) {
e.printStackTrace();

}

return XXXX;

}

期间碰到一个问题，body 始终为空，怎么都接收不到数据；

解决办法：在@RequestMapping(value = "/XXXX", method = RequestMethod.POST)里加个headers = "Content-type=text/plain"后就好了；

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public static String copyToString(InputStream in, Charset charset) throws IOException {
Assert.notNull(in, "No InputStream specified");
StringBuilder out = new StringBuilder();
InputStreamReader reader = new InputStreamReader(in, charset);
char[] buffer = new char[BUFFER_SIZE];
int bytesRead = -1;
while ((bytesRead = reader.read(buffer)) != -1) {
out.append(buffer, 0, bytesRead);
}
return out.toString();
}