1. 简单示例
//http://localhost:8080/
//requestBody: {"people":{"name":"zhou","age":"123123"},"postCode":66666}
//header: Content-Type:application/json
@RestController
@EnableAutoConfiguration
public class Example {
@RequestMapping(value = "/", method = RequestMethod.POST)
People home(@RequestBody RequestParam requestParam) {
System.out.println(requestParam.getPostCode());
System.out.println(requestParam.getPeople().getName());
return new People();
}
public static void main(String[] args) throws Exception {
SpringApplication.run(Example.class, args);
}
}
class RequestParam {
private int postCode;
public int getPostCode() {
return postCode;
}
public void setPostCode(int postCode) {
this.postCode = postCode;
}
public People getPeople() {
return people;
}
public void setPeople(People people) {
this.people = people;
}
private People people;
}
class People {
private String name;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
2. 相关注解
2.2 @RequestMapping
2.2.1 属性:value 指定请求的实际url
@Controller
@RequestMapping(value="/book")
public class BookController {
@RequestMapping(value="/title")
public String getTitle(){
return "title";
}
@RequestMapping(value="/content")
public String getContent(){
return "content";
}
}
//@PathVariable注解即提取路径中的变量值
@RequestMapping(value="/get/{bookId}")
public String getBookById(@PathVariable String bookId,Model model){
model.addAttribute("bookId", bookId);
return "book";
}
(3)ant风格
@RequestMapping(value="/get/id?"):可匹配“/get/id1”或“/get/ida”,但不匹配“/get/id”或“/get/idaa”;
@RequestMapping(value="/get/id*"):可匹配“/get/idabc”或“/get/id”,但不匹配“/get/idabc/abc”;
@RequestMapping(value="/get/id/*"):可匹配“/get/id/abc”,但不匹配“/get/idabc”;
@RequestMapping(value="/get/id/**/{id}"):可匹配“/get/id/abc/abc/123”或“/get/id/123”,也就是Ant风格和URI模板变量风格可混用。
(4)含正则表达式的一类值
@RequestMapping(value="/get/{idPre:\d+}-{idNum:\d+}"):可以匹配“/get/123-1”,但不能匹配“/get/abc-1”,这样可以设计更加严格的规则。
可以通过@PathVariable 注解提取路径中的变量(idPre,idNum)
(5)或关系
@RequestMapping(value={"/get","/fetch"} )即 /get或/fetch都会映射到该方法上
2.2.2 属性:method 指定请求类型,GET/POST
@RequestMapping(value="/get/{bookid}",method={RequestMethod.GET,RequestMethod.POST})
2.2.3 属性:params 必须包含某些参数值是,才让该方法处理
@RequestMapping(params="action=del"),请求参数包含“action=del”,如:http://localhost:8080/book?action=del
@RequestMapping(value="/header/id", headers = "Accept=application/json"):表示请求的URL必须为“/header/id 且请求头中必须有“Accept =application/json”参数即可匹配。
2.2.5 属性: consumes 指定处理请求的提交内容类型(Content-Type),例如application/json, text/html
@RequestMapping(value = "/pets", method = RequestMethod.POST, consumes="application/json")
2.2.6 属性:produces 仅当request请求头中的(Accept)类型中包含该指定类型才返回
@RequestMapping(value = "/pets/{petId}", method = RequestMethod.GET, produces="application/json")
2.3 @RequestParam 解析获取单个请求参数值
public String requestparam1(@RequestParam String username) //请求中包含username参数(如/requestparam1?username=zhang),则自动传入。
@RequestParam有以下三个参数:
value:参数名字,即入参的请求参数名字,如username表示请求的参数区中的名字为username的参数的值将传入;
required:是否必须,默认是true,表示请求中一定要有相应的参数,否则将抛出异常;
defaultValue:默认值,表示如果请求中没有同名参数时的默认值,设置该参数时,自动将required设为false
2.4 @PathVariable 绑定URL模板变量值
@RequestMapping(value="/users/{userId}/topics/{topicId}")
public String test(
@PathVariable(value="userId") int userId,
@PathVariable(value="topicId") int topicId)
2.5 @RequestBody 将HTTP请求正文转换为适合的对象
2.6 @ResponseBody
该注解用于将Controller的方法返回的对象,通过适当的HttpMessageConverter转换为指定格式后,写入到Response对象的body数据区