结合使用HTTP开发客户端和发布请求和Content-Type应用程序/ x-www-form-urlencoded

1）仅@RequestBody

请求-本地主机：8080 / SpringMVC /欢迎进入正文-name = abc

Code

@RequestMapping(method = RequestMethod.POST)
public String printWelcome(@RequestBody String body, Model model) {
    model.addAttribute("message", body);
    return "hello";
}

//如预期的那样将正文命名为“ name = abc”

2）仅@RequestParam

请求-本地主机：8080 / SpringMVC /欢迎进入正文-name = abc

Code

@RequestMapping(method = RequestMethod.POST)
public String printWelcome(@RequestParam String name, Model model) {
    model.addAttribute("name", name);
    return "hello";
}

//预期名称为“ abc”

3）两者在一起

请求-本地主机：8080 / SpringMVC /欢迎进入正文-name = abc

Code

@RequestMapping(method = RequestMethod.POST)
public String printWelcome(@RequestBody String body, @RequestParam String name, Model model) {
    model.addAttribute("name", name);
    model.addAttribute("message", body);
    return "hello";
}

// HTTP错误代码400-客户端发送的请求在语法上不正确。

4）上面的参数位置已更改

请求-本地主机：8080 / SpringMVC /欢迎进入正文-name = abc

Code

@RequestMapping(method = RequestMethod.POST)
public String printWelcome(@RequestParam String name, @RequestBody String body, Model model) {
    model.addAttribute("name", name);
    model.addAttribute("message", body);
    return "hello";
}

//没有错误。名称为“ abc”。身体是空的

5）在一起但获取类型url参数

请求-本地主机：8080 / SpringMVC / welcome？name = xyz在正文中-name = abc

Code

@RequestMapping(method = RequestMethod.POST)
public String printWelcome(@RequestBody String body, @RequestParam String name, Model model) {
    model.addAttribute("name", name);
    model.addAttribute("message", body);
    return "hello";
}

//名称为“ xyz”，主体为“ name = abc”

6）与5）相同，但参数位置已更改

Code

@RequestMapping(method = RequestMethod.POST)
public String printWelcome(@RequestParam String name, @RequestBody String body, Model model) {
    model.addAttribute("name", name);
    model.addAttribute("message", body);
    return "hello";
}

// name =’xyz，abc’主体为空

有人可以解释这种行为吗？