项目框架搭建：
DemoController：
package com.imooc.miaosha.controller; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import com.imooc.miaosha.result.CodeMsg; import com.imooc.miaosha.result.Result; @Controller @RequestMapping("/demo") public class DemoController { @RequestMapping("/") @ResponseBody String home() { return "Hello World!"; } //1.rest api json输出 2.页面 @RequestMapping("/hello") @ResponseBody public Result<String> hello() { return Result.success("hello,imooc"); // return new Result(0, "success", "hello,imooc"); } @RequestMapping("/helloError") @ResponseBody public Result<String> helloError() { return Result.error(CodeMsg.SERVER_ERROR); //return new Result(500102, "XXX"); } @RequestMapping("/thymeleaf") public String thymeleaf(Model model) { model.addAttribute("name", "Joshua"); return "hello"; } }
CodeMsg：
package com.imooc.miaosha.result; public class CodeMsg { private int code; private String msg; //通用异常 public static CodeMsg SUCCESS = new CodeMsg(0, "success"); public static CodeMsg SERVER_ERROR = new CodeMsg(500100, "服务端异常"); //登录模块 5002XX //商品模块 5003XX //订单模块 5004XX //秒杀模块 5005XX private CodeMsg(int code, String msg) { this.code = code; this.msg = msg; } public int getCode() { return code; } public String getMsg() { return msg; } }
Result：
package com.imooc.miaosha.result; public class Result<T> { private int code; private String msg; private T data; /** * 成功时候的调用 * */ public static <T> Result<T> success(T data){ return new Result<T>(data); } /** * 失败时候的调用 * */ public static <T> Result<T> error(CodeMsg cm){ return new Result<T>(cm); } private Result(T data) { this.code = 0; this.msg = "success"; this.data = data; } private Result(CodeMsg cm) { if(cm == null) { return; } this.code = cm.getCode(); this.msg = cm.getMsg(); } public int getCode() { return code; } public String getMsg() { return msg; } public T getData() { return data; } }
MainApplication：
package com.imooc.miaosha; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class MainApplication { public static void main(String[] args) throws Exception { SpringApplication.run(MainApplication.class, args); } }
hello.html:
<!DOCTYPE HTML> <html xmlns:th="http://www.thymeleaf.org"> <head> <title>hello</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> </head> <body> <p th:text="'hello:'+${name}" ></p> </body> </html>
application.properties:
spring.thymeleaf.cache=false spring.thymeleaf.content-type=text/html spring.thymeleaf.enabled=true spring.thymeleaf.encoding=UTF-8 spring.thymeleaf.mode=HTML5 spring.thymeleaf.prefix=classpath:/templates/ spring.thymeleaf.suffix=.html