SpringMVC接受参数

SpringMVC 能将GET、POST请求中的参数（键值对、Json）自动转换成我们需要的类型，如基本类型、数组、List、Set、Map、POJO，以及它们的组合。

private Logger logger = LoggerFactory.getLogger(ParameterController.class);/*接受基本类型参数
* http://localhost:8080/param/primitive.do?id=10&name=张家乐&status=true*/
@RequestMapping("/primitive")
@ResponseBody
public String primitiveType(Long id, String name, Boolean status) throws UnsupportedEncodingException {name = new String(name.getBytes("ISO8859-1"), "UTF-8");logger.info("ID:{}, NAME:{}, STATUS:{}", id, name, status);StringBuilder str = new StringBuilder(String.valueOf(id)).append(" ").append(name).append(" ").append(status);return str.toString();
}/*接受数组参数，该方式只能在URL中传递
* http://localhost:8080/param/array.do?name=tom&name=rose&name=jack*/
@RequestMapping("/array")
@ResponseBody
public String[] arrayType(String[] name) {logger.info("Array:{}", Arrays.toString(name));return name;
}/*接受数组参数，通过将数组放在Body中以JSON形式传输*/
@RequestMapping(value = "/array2", method = RequestMethod.POST)
@ResponseBody
public String[] arrayType2(@RequestBody String[] name) {logger.info("Array:{}", Arrays.toString(name));return name;
}/*接受简单对象参数
* http://localhost:8080/param/simpleObject.do
* Content-Type：application/x-www-form-urlencoded*/
@RequestMapping(value = "/simpleObject", method = RequestMethod.POST)
@ResponseBody
public User simpleObject(User user) {logger.info("Simple Object:{}", user.toString());return user;
}/*接受List类型的参数
* http://localhost:8080/param/list.do
* Content-Type：application/json
* [1, 2, 3, 4, 5]*/
@RequestMapping(value = "/list", method = RequestMethod.POST)
@ResponseBody
public List<String> listType(@RequestBody List<String> list) {logger.info("List:{}", Arrays.toString(list.toArray()));return list;
}/*接受List类型的参数
* http://localhost:8080/param/list2.do
* Content-Type：application/json
* [{"id": 10, "username": "jiale", "password": "23223"},{"id": 120, "username": "jiale2", "password": "2322f23"},{"id": 103, "username": "jial3e", "password": "232fd23"}]*/
@RequestMapping(value = "/list2", method = RequestMethod.POST)
@ResponseBody
public List<User> listType2(@RequestBody List<User> list) {logger.info("List:{}", Arrays.toString(list.toArray()));return list;
}/*接受Set类型的参数
* http://localhost:8080/param/set.do
* Content-Type：application/json
* [{"id": 10, "username": "jiale", "password": "23223"},{"id": 120, "username": "jiale2", "password": "2322f23"},{"id": 103, "username": "jial3e", "password": "232fd23"}]*/
@RequestMapping(value = "/set", method = RequestMethod.POST)
@ResponseBody
public Set<User> setType(@RequestBody Set<User> set) {set.stream().forEach(e -> {logger.info("Id:{}, Username:{}, Password: {}\n", e.getId(), e.getUsername(), e.getPassword());});return set;
}/*接受Map类型的参数
* http://localhost:8080/param/set.do
* Content-Type：application/json
* {"user01": {"id": 10, "username": "jiale", "password": "23223"},
"user02": {"id": 10, "username": "jiale", "password": "23223"}}*/
@RequestMapping(value = "/map", method = RequestMethod.POST)
@ResponseBody
public Map<String, User> setType(@RequestBody Map<String, User> map) {Set<String> keys = map.keySet();keys.stream().forEach(e -> {User user = map.get(e);logger.info("Id:{}, Username:{}, Password: {}\n", user.getId(), user.getUsername(), user.getPassword());});return map;
}

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