1.简介
SpringBoot是什么
Spring Boot它本身并不提供Spring框架的核心特性以及扩展功能，只是用于快速、敏捷地开发新一代基于Spring框架的应用程序。 也就是说，它并不是用来替代Spring的解决方案，而是和Spring框架紧密结合用于提升Spring开发者体验的工具 同时它集成了大量常用的第三方库配置（例如Jackson, JDBC, Mongo, Redis, Mail等等）， Spring Boot应用中这些第三方库几乎可以零配置的开箱即用（out-of-the-box），大部分的Spring Boot应用都 只需要非常少量的配置代码，开发者能够更加专注于业务逻辑
注1：敏捷式开发
注2：spring boot其实不是什么新的框架，它默认配置了很多框架的使用方式，
就像maven整合了所有的jar包，spring boot整合了所有的框架
注3：基于Spring框架的一站式解决方案
2.入门
2.1.创建项目
2.2.启动项目
出现错误
配置默认不加载数据源
package com.zjzaki.spboot02; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; @SpringBootApplication(exclude = DataSourceAutoConfiguration.class) //这里是改动 public class Spboot02Application { public static void main(String[] args) { SpringApplication.run(Spboot02Application.class, args); } }
此时再启动, 启动成功
2.3.添加实例
web层
package com.zjzaki.spboot02.web; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class IndexController { @RequestMapping("/") public String index(){ System.out.println("进入测试...."); return "index"; } }
重启项目
2.4.响应封装类
Result.java
package com.zjzaki.spboot02.web; public class Result<T> { private int code; private String msg; //因为返回的数据不知道是什么类型，所以定义一个泛型 private T data; private long total; public long getTotal() { return total; } public void setTotal(long total) { this.total = total; } /** * 成功的时候调用 */ public static <T> Result<T> ok(T data) { return new Result<T>(data); } public static <T> Result<T> ok(int code,String msg) { return new Result<>(code,msg); } public static <T> Result<T> ok(int code,String msg,T data) { Result<T> success = ok(data); success.setCode(code); success.setMsg(msg); return success; } public static <T> Result<T> ok(int code,String msg,T data,long total) { Result<T> success = ok(code,msg,data); success.setTotal(total); return success; } /** * 失败的时候调用 */ public static <T> Result<T> error(CodeMsg codeMsg) { return new Result<T>(codeMsg); } private Result(T data) { this.data = data; } private Result(int code, String msg) { this.code = code; this.msg = msg; } private Result(CodeMsg codeMsg) { if (codeMsg != null) { this.code = codeMsg.getCode(); this.msg = codeMsg.getMsg(); } } public int getCode() { return code; } public void setCode(int code) { this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public T getData() { return data; } public void setData(T data) { this.data = data; } }
CodeMsg.java
package com.zjzaki.spboot02.web; public class CodeMsg { private int code; private String msg; //通用的错误码 public static CodeMsg SUCCESS = new CodeMsg(200, "success"); public static CodeMsg SERVER_ERROR = new CodeMsg(500, "服务端异常"); public static CodeMsg BIND_ERROR = new CodeMsg(500101, "参数校验异常：%s"); public static CodeMsg REQUEST_ILLEGAL = new CodeMsg(500102, "请求非法"); public static CodeMsg ACCESS_LIMIT_REACHED = new CodeMsg(500104, "访问太频繁！"); //登录模块5002XX public static CodeMsg SESSION_ERROR = new CodeMsg(500210, "Session不存在或者已经失效"); public static CodeMsg PASSWORD_EMPTY = new CodeMsg(500211, "登录密码不能为空"); public static CodeMsg MOBILE_EMPTY = new CodeMsg(500212, "手机号不能为空"); public static CodeMsg MOBILE_ERROR = new CodeMsg(500213, "手机号格式错误"); public static CodeMsg MOBILE_NOT_EXIST = new CodeMsg(500214, "手机号不存在"); public static CodeMsg PASSWORD_ERROR = new CodeMsg(500215, "密码错误"); //商品模块5003XX //订单模块5004XX public static CodeMsg ORDER_NOT_EXIST = new CodeMsg(500400, "订单不存在"); //秒杀模块5005XX public static CodeMsg MIAO_SHA_OVER = new CodeMsg(500500, "商品已经秒杀完毕"); public static CodeMsg REPEATE_MIAOSHA = new CodeMsg(500501, "不能重复秒杀"); public static CodeMsg MIAOSHA_FAIL = new CodeMsg(500502, "秒杀失败"); private CodeMsg() { } private CodeMsg(int code, String msg) { this.code = code; this.msg = msg; } public int getCode() { return code; } public void setCode(int code) { this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; } public CodeMsg fillArgs(Object... args) { int code = this.code; String message = String.format(this.msg, args); return new CodeMsg(code, message); } @Override public String toString() { return "CodeMsg [code=" + code + ", msg=" + msg + "]"; } }
DemoController2.java
package com.zjzaki.spboot02.web; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import org.springframework.web.bind.annotation.*; import java.util.Arrays; @RestController @RequestMapping("/demo2") public class DemoController2 { @GetMapping("/list") public Result list(){ return Result.ok(200,"查询成功", Arrays.asList( new Demo(1,"足球"), new Demo(2,"篮球"), new Demo(3,"排球"), new Demo(4,"羽毛球"), new Demo(5,"台球") ),168); } @PostMapping("/add") public Result add(){ return Result.ok(200,"新增成功"); } @PostMapping("/load") public Result load(){ return Result.ok(200,"加载成功",new Demo(3,"排球")); } @PutMapping("/edit") public Result edit(){ return Result.ok(200,"修改成功"); } @DeleteMapping("/delete") public Result delete(){ return Result.ok(200,"删除成功"); } @GetMapping("/queryByUser") public Result queryByUser(){ return Result.error(CodeMsg.BIND_ERROR.fillArgs("密码等级太低")); } } @Data @NoArgsConstructor @AllArgsConstructor class Demo{ private int id; private String name; }
请求http://localhost:8080/demo2/list 正常访问
访问http://localhost:8080/demo2/add 出现405错误
此时需要用到一个工具
3.Eolink安装与使用
3.1.双击安装文件
点击下一步
3.2.选择安装位置
3.3.点击安装,等待自动更新完成
3.4.扫码登录
3.5.选择快速测试
3.6.后台数据接收
修改DemoController2的add方法
@PostMapping("/add") public Result add(Demo demo, @RequestBody Map map,@RequestHeader("jwt") String jwt){ System.out.println(demo); System.out.println(map); System.out.println(jwt); return Result.ok(200,"新增成功"); }
控制台打印
4.安装 Convert YAML and Properties File 的插件
Properties在配置项很多是不便于查看,此时我们需要yaml文件来进行配置(能够有层次感, 方便查看)
