SpringMvc 中参数有多种接收方式：@RequestBody @RequestParam @RequestHeader @PathVariable etc.
下面详细测试，各种参数接收方式适合的场景

//    Content-Type    application/x-www-form-urlencoded
//    Accept    */*
//    Accept-Encoding    gzip, deflate, br
//    Accept-Language    zh-CN,zh;q=0.8,en;q=0.6
//    param1=param1&param2=param2
    @RequestMapping("test/testParam1")
    @ResponseBody
    public String testParam1(HttpServletRequest request, String param1, String param2){
        Map result = new HashMap();
        result.put("param1", param1);
        result.put("param2", param2);
        return JSON.toJSONString(result);
    }


//    Content-Type    application/x-www-form-urlencoded
//    Accept    */*
//    Accept-Encoding    gzip, deflate, br
//    Accept-Language    zh-CN,zh;q=0.8,en;q=0.6
//    param1=param1&param2=param2
//    操作正常但是用RAW的方式请求，就会给出Required String parameter 'param1' is not present的异常
//    原因是请求里面Content-Type: application/json 而不是 application/x-www-form-urlencoded
//    参数的形式是一个json字符串，requestparam 无法解析

    @RequestMapping("test/testRequestParam")
    @ResponseBody
    public String testRequestParam(@RequestParam String param1, @RequestParam String param2){
        Map result = new HashMap();
        result.put("param1", param1);
        result.put("param2", param2);
        return JSON.toJSONString(result);
    }


//    Content-Type: application/json
    //如果用requestbody的形式接收，请求体里面所有的所有内容会绑定到param1中
    //可以看一下

    @RequestMapping("test/testRequestBody")
    @ResponseBody
    public String testRequestBody(@RequestBody String param1){
        Map result = new HashMap();
        result.put("param1", param1);
        return JSON.toJSONString(result);
    }

    @RequestMapping("test/testRequestbodyMap")
    @ResponseBody
    public String testRequestbodyMap(@RequestBody Map map){
        Map result = new HashMap();
        result.put("param1", map.get("param1"));
        return JSON.toJSONString(result);
    }

    //匹配路径，作为参数
    @RequestMapping("test/{param1}/{param2}")
    @ResponseBody
    public String testPathVariable(@PathVariable String param1, @PathVariable String param2){
        Map result = new HashMap();
        result.put("param1", param1);
        result.put("param2", param2);
        return JSON.toJSONString(result);
    }

//    param2: parameter2
//    param1: parameter1
//    Content-Type: application/json
//    Accept: */*
//    Accept-Encoding: gzip, deflate, br
//    Accept-Language: zh-CN,zh;q=0.8,en;q=0.6

    @RequestMapping("test/testRequestHeader")
    @ResponseBody
    public String testRequestHeader(@RequestHeader String param1, @RequestHeader String param2){
        Map result = new HashMap();
        result.put("param1", param1);
        result.put("param2", param2);
        return JSON.toJSONString(result);
    }

//    Content-Type: application/json
//    Accept: */*
//    Accept-Encoding: gzip, deflate, br
//    Accept-Language: zh-CN,zh;q=0.8,en;q=0.6
//    Cookie: JSESSIONID=1231; Hm_lvt_82116c626a8d504a5c0675073362ef6f=1491372429
    @RequestMapping("test/testCookieValue")
    @ResponseBody
    public String testCookieValue(@CookieValue(value = "JSESSIONID") String param1){
        Map result = new HashMap();
        result.put("param1", param1);
        return JSON.toJSONString(result);
    }