Spring MVC常用注解

浅浅的花香味﹌ 2022-06-13 07:51 170阅读 0赞

话不多说，直接代码：

@Controller//控制器
    @RequestMapping("/anno")//路径
    public class DemoAnnoController {
        /** * 此方法未标明路径，因此使用类级别的路径/anno；produces可定制返回的response的媒体类型和字符集，或需要返回值是json对象。 * ResponseBody支持将返回值放在response体内，而不是返回一个页面，此注解返回数据，此注解可以放置在返回值前或者方法上。 * @param request * @return */ @RequestMapping(produces = "text/plain;charset=UTF-8")
        public @ResponseBody String index(HttpServletRequest request){
            return "url:"+request.getRequestURI()+" can access";
        }
    
        /** * PathVariable接收路径参数 * @param str * @param request * @return */ @RequestMapping(value="/pathvar/{str}",produces = "text/plain;charset=UTF-8")
        public @ResponseBody String demoPathVar(@PathVariable String str,HttpServletRequest request){
            return "url:"+request.getRequestURI()+" can access,str: "+str;
        }
        @RequestMapping(value = "/requestParam",produces = "text/plain;charset=UTF-8")
        public @ResponseBody String passRequestParam(Long id,HttpServletRequest request){
            return "url:"+request.getRequestURI()+" can access,id: "+id;
        }
        @RequestMapping(value = "/obj",produces = "application/json;charset=UTF-8")
        @ResponseBody
        public String passObj(DemoObj obj,HttpServletRequest request){
            return "url:"+request.getRequestURI()+" can access, obj id: "+obj.getId()+" obj name:"+obj.getName();
        }
    
        /** * 可以映射不同的路径到相同的方法 * @param request * @return */ @RequestMapping(value = {
      "/name1","/name2"},produces = "text/plain;charset=UTF-8")
        public @ResponseBody String remove(HttpServletRequest request){
            return "url:"+request.getRequestURI()+" can access ";
        }
    }

@RestController//使用该注解，声明是控制器，并且返回数据时不需要@ResponseBody
    @RequestMapping("/rest")
    public class DemoRestController {
        //返回json类型的数据
        @RequestMapping(value = "/getjson",produces = {
      "application/json;charset=UTF-8"})
        public DemoObj getjson(DemoObj obj){
            return new DemoObj(obj.getId()+1,obj.getName()+"yy");
        }
        //返回xml类型的数据。
        @RequestMapping(value = "/getxml",produces = {
      "application/xml;charset=UTF-8"})
        public DemoObj getxml(DemoObj obj){
            return new DemoObj(obj.getId()+1,obj.getName()+"yy");
        }
    }