前言

• springboot 2.1.1.RELEASE

@RequestBody 接收字符串

    @RequestMapping(method = {RequestMethod.POST})
    public ResultEntity form1(@RequestBody String requestBody) throws UnsupportedEncodingException {
		logger.info("================ request body ================");\
		logger.info("request body is : {}", requestBody);
	}

向接口传送 application/json 格式的数据

客户端调用代码如下：

$.ajax({
    url:'http://localhost/api/spd',
    data: JSON.stringify({name:'zhangsan', age: 18}),
    type:'POST',
    contentType: 'application/json',
    success:function(result){
        console.log(result);
    },
    error:function(error){
    	console.log(error);
    }
});

服务端执行结果：

00:11:55.972 [http-nio-8020-exec-5] INFO  c.c.api.SpdApi - [form1,45] - request body is : {"name":"zhangsan","age":18}

向接口传送 text/plain 格式的数据

客户端调用代码如下：

$.ajax({
    url:'http://localhost/api/spd',
    data: 'this is a message',
    type:'POST',
    contentType: 'text/plain',
    success:function(result){
        console.log(result);
    },
    error:function(error){
    	console.log(error);
    }
});

服务端执行结果：

23:46:04.953 [http-nio-8020-exec-1] INFO  c.c.api.SpdApi - [form1,45] - request body is : 'this is a message'

替代 @RequestBody 的办法

如果不想用 @RequestBody ，可以使用下面的方法：

	protected String getRequestBody(HttpServletRequest request) {
		try {
			BufferedReader reader = request.getReader();
			char[] buf = new char[512];
			int len = 0;
			StringBuffer contentBuffer = new StringBuffer();
			while ((len = reader.read(buf)) != -1) {
				contentBuffer.append(buf, 0, len);
			}
			return contentBuffer.toString();

		} catch (IOException e) {
			e.printStackTrace();
		}
		
		return "null";
	}