springmvc接收参数方式

1. 参数放在请求体

以json串的格式设置在Http请求报文的请求体中。

@RequestMapping(value="/body",method=RequestMethod.POST)
public Result testPostByBody(@RequestBody User user) {
    Logger logger = org.slf4j.LoggerFactory.getLogger(this.getClass());
    logger.info(user.toString());
    return new Result();
}

报文格式：

Hypertext Transfer Protocol
    POST /single-app/test/body HTTP/1.1\r\n
    Content-Type: application/json\r\n
    cache-control: no-cache\r\n
    Postman-Token: c4e08bb6-aa6c-4fb7-b8cb-8a278785c8cd\r\n
    User-Agent: PostmanRuntime/7.1.1\r\n
    Accept: */*\r\n
    Host: 106.15.95.37:8089\r\n
    accept-encoding: gzip, deflate\r\n
    content-length: 45\r\n
    Connection: keep-alive\r\n
    \r\n
    [Full request URI: http://106.15.95.37:8089/single-app/test/body]
    [HTTP request 1/2]
    [Response in frame: 17770]
    File Data: 45 bytes
JavaScript Object Notation: application/json
    Object
        Member Key: id
            Number value: 1
            Key: id
        Member Key: name
            String value: sunpy
            Key: name
        Member Key: pwd
            String value: 123456
            Key: pwd

日志结果：

body.png

2. 参数放在请求头

以以键值对的形式，参数设置在HTTP请求报文的请求头中。

@RequestMapping(value="/header", method=RequestMethod.POST)
public Result testPostByHeader(@RequestHeader("name") String name) {
    Logger logger = org.slf4j.LoggerFactory.getLogger(this.getClass());
    logger.info(name);
    return new Result();
}

报文格式：

Hypertext Transfer Protocol
    POST /single-app/test/header HTTP/1.1\r\n
    Content-Type: application/json\r\n
    name: sunpy\r\n
    cache-control: no-cache\r\n
    Postman-Token: 098aabc8-4f60-424a-b94b-8fcce7ac8a38\r\n
    User-Agent: PostmanRuntime/7.1.1\r\n
    Accept: */*\r\n
    Host: 106.15.95.37:8089\r\n
    accept-encoding: gzip, deflate\r\n
    content-length: 0\r\n
    Connection: keep-alive\r\n
    \r\n
    [Full request URI: http://106.15.95.37:8089/single-app/test/header]
    [HTTP request 1/1]
    [Response in frame: 19405]

日志结果：

header.png

3. 路径传单个参数

将参数作为url的路径的一部分。

@RequestMapping(value="/path/{name}", method=RequestMethod.POST)
public Result testPostByPath(@PathVariable("name") String name) {
    Logger logger = org.slf4j.LoggerFactory.getLogger(this.getClass());
    logger.info(name);
    return new Result();
}

报文格式：

Hypertext Transfer Protocol
    POST /single-app/test/path/zhangsan HTTP/1.1\r\n
    Content-Type: application/json\r\n
    cache-control: no-cache\r\n
    Postman-Token: fe659759-3ac0-422c-8b9a-486ca44fa89a\r\n
    User-Agent: PostmanRuntime/7.1.1\r\n
    Accept: */*\r\n
    Host: 106.15.95.37:8089\r\n
    accept-encoding: gzip, deflate\r\n
    content-length: 0\r\n
    Connection: keep-alive\r\n
    \r\n
    [Full request URI: http://106.15.95.37:8089/single-app/test/path/zhangsan]
    [HTTP request 1/1]
    [Response in frame: 22715]

日志结果：

path.png

4. 路径携带参数传参

@RequestMapping(value="/pathAttr",method=RequestMethod.POST)
public Result testPostByPathAttr(@RequestParam("name") String name) {
    Logger logger = org.slf4j.LoggerFactory.getLogger(this.getClass());
    logger.info(name);
    return new Result();
}

报文格式：

Hypertext Transfer Protocol
    POST /single-app/test/pathAttr?name=sunpy HTTP/1.1\r\n
    Content-Type: application/json\r\n
    cache-control: no-cache\r\n
    Postman-Token: a80965b0-a1a7-4355-8384-17bec250c670\r\n
    User-Agent: PostmanRuntime/7.1.1\r\n
    Accept: */*\r\n
    Host: 106.15.95.37:8089\r\n
    accept-encoding: gzip, deflate\r\n
    content-length: 0\r\n
    Connection: keep-alive\r\n
    \r\n
    [Full request URI: http://106.15.95.37:8089/single-app/test/pathAttr?name=sunpy]
    [HTTP request 1/1]
    [Response in frame: 40775]

日志结果：

pathAttr.png

---

感受：postman这个工具太好用了，省得我写js发送HTTP请求，直接发请求！