目录
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
步骤如下:联网操作
#可以换源
http://start.aliyun.com
#默认勾选web、lombok、Mybatis组件





项目创建成功

项目结构:
static 静态资源如js、img等
template:模板引擎相对于maven项目里的webapp
springboot默认是不支持jsp界面跳转的
application.properties;springboot中唯二的配置文件
实践新建一个控制类IndexController
- package com.zking.springboot001;
-
- import org.springframework.web.bind.annotation.RequestMapping;
- import org.springframework.web.bind.annotation.RestController;
-
- /**
- * @author 锦鲤
- * @site www.lucy.com
- * @company xxx公司
- * @create 2022-10-28 18:30
- *
- * @RestController 返回json串
- */
-
- @RestController
- public class IndexController {
-
- @RequestMapping("/")
- public String index(){
- System.out.println("come");
- return "index";
- }
- }
测试
- package com.zking.springboot001;
-
- import org.springframework.boot.SpringApplication;
- import org.springframework.boot.autoconfigure.SpringBootApplication;
-
- @SpringBootApplication
- public class Springboot001Application {
-
- public static void main(String[] args) {
- SpringApplication.run(Springboot001Application.class, args);
- }
-
-
-
- }
效果

再新建一个项目Springboot02
不同处;

- package com.zking.springboot02.web;
-
- import org.springframework.web.bind.annotation.RequestMapping;
- import org.springframework.web.bind.annotation.RestController;
-
- /**
- * @author 锦鲤
- * @site www.lucy.com
- * @company xxx公司
- * @create 2022-10-28 18:30
- *
- * @RestController 返回json串
- */
-
- @RestController
- public class IndexController {
-
- @RequestMapping("/")
- public String index(){
- System.out.println("come");
- return "index";
- }
- }
运行时报错:

package com.zking.springboot02; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration; //解决方法: @SpringBootApplication(exclude = DataSourceAutoConfiguration.class) public class Springboot02Application { public static void main(String[] args) { SpringApplication.run(Springboot02Application.class, args); } }
安装 Convert YAML and Properties File 的插件
application.properties
# 应用名称
spring.application.name=testspringboot02
# 应用服务 WEB 访问端口
server.port=8081
#下面这些内容是为了让MyBatis映射
#指定Mybatis的Mapper文件
mybatis.mapper-locations=classpath:mappers/*xml
#指定Mybatis的实体目录
mybatis.type-aliases-package=com.zking.testspringboot02.mybatis.entity
选中application.properties右键点击 Convert YAML and Properties File

调整格式如下
- server:
- port: 8080
- servlet:
- context-path: /lx
- spring:
- activemq:
- pool:
- block-if-full: false
- application:
- name: springboot001
- cache:
- infinispan:
- config: 'classpath*:'
测试代码
- package com.zking.springboot001;
-
- import jdk.nashorn.internal.objects.annotations.Constructor;
- import lombok.AllArgsConstructor;
- import lombok.Data;
- import org.springframework.web.bind.annotation.*;
-
- import java.util.Arrays;
- import java.util.HashMap;
- import java.util.List;
- import java.util.Map;
-
- /**
- * @author 锦鲤
- * @site www.lucy.com
- * @company xxx公司
- * @create 2022-10-28 19:31
- */
- @RestController
- @RequestMapping("/book")
- public class BookController {
-
- // @RequestMapping("/list")
- // public Map list(){
- // Map map=new HashMap();
- // map.put("msg","成功");
- // map.put("code",200);
- // return map;
- // }
- /* @GetMapping("list")
- public Map list(){}
- */
-
-
-
- @PutMapping("/add")
- public Map add(){
- Map map=new HashMap();
- map.put("msg","增加成功");
- map.put("code",200);
- return map;
- }
-
- @PostMapping("/update")
- public Map update(){
- Map map=new HashMap();
- map.put("msg","修改成功");
- map.put("code",200);
- return map;
- }
-
- @DeleteMapping("/del")
- public Map del(){
- Map map=new HashMap();
- map.put("msg","删除成功");
- map.put("code",200);
- return map;
- }
-
-
- //查询单个
- @RequestMapping("/load")
- public Map load(){
-
- Map map=new HashMap();
- map.put("data",new Book(1,"活着"));
- map.put("msg","查询成功");
- map.put("code",200);
- return map;
- }
-
-
-
-
- // 查询全部
- @RequestMapping("/list")
- public Map list(){
- List<Book> books= Arrays.asList(
- new Book(1,"红楼梦"),
- new Book(2,"水浒传"),
- new Book(3,"西游记"),
- new Book(4,"三国演义"));
- Map map=new HashMap();
- map.put("data",books);
- map.put("total",122);
- map.put("msg","查询成功");
- map.put("code",200);
- return map;
- }
-
-
- }
-
- @AllArgsConstructor
- @Data
- class Book{
- private int id;
- private String name;
- }
进行测试
package com.zking.springboot001;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Springboot001Application {
public static void main(String[] args) {
SpringApplication.run(Springboot001Application.class, args);
}
}
eolink的使用:更细致地调测后台数据接口
企业常使用postman
安装后注册账户并且测试各个方法
修改

增加

删除

查询全部

查询书籍


响应封装类
Result.java
CodeMsg.java
package com.zking.springboot001.Result; 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 + "]"; } }
BookController2
@RequestMapping("/book2")
- package com.zking.springboot001;
-
- import com.zking.springboot001.Result.Result;
- import lombok.AllArgsConstructor;
- import lombok.Data;
- import org.springframework.web.bind.annotation.*;
-
- import java.util.Arrays;
- import java.util.HashMap;
- import java.util.List;
- import java.util.Map;
-
- /**
- * @author 锦鲤
- * @site www.lucy.com
- * @company xxx公司
- * @create 2022-10-28 19:31
- */
- @RestController
- @RequestMapping("/book2")
- public class BookController2 {
-
-
- @PutMapping("/add")
- public Result add(Book book){
-
- return Result.ok(200,"增加成功");
- }
-
- @PostMapping("/update")
- public Result update(){
-
- return Result.ok(200,"修改成功");
- }
-
- @DeleteMapping("/del")
- public Result del(int bid){
-
- return Result.ok(200,"删除成功");
- }
-
-
- //查询单个
- @RequestMapping("/load")
- public Result load(){
-
- return Result.ok(200,"加载成功");
- }
-
-
-
-
- // 查询全部
- @RequestMapping("/list")
- public Result list(){
- List
books= Arrays.asList( - new Book(1,"红楼梦"),
- new Book(2,"水浒传"),
- new Book(3,"西游记"),
- new Book(4,"三国演义"));
-
- return Result.ok(200,"查询成功",books,222);
- }
-
-
- }
-
例如会出现的错误
@PutMapping("/add") public Result add(Book book){ int id=book.getId(); if(id==0){ Map map=new HashMap(); map.put("错误msg","id未传递"); } return Result.ok(200,"增加成功"); }
- //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");
