优点
1.可以快速独立的创建Spring及主流框架集成的项目。
2.使用了嵌入式的Servlet容器,无需生成WAR包
3.我们在使用SpringBoot进行开发时可以使用Starts启动依赖，而SpringBoot会自动地把所需要的其他相关技术jar包导入.
4.大量的自动配置，极大地简化了我们的开发。
5.无需XML文件的大量编写,也不会生成代码，底层是利用SpringBoot写好的API来调用实现,开箱即用
6.SpringBoot也有运维监控项目的功能
7.SpringBoot与云计算的集成
框架整合及配置
版本
java8+Maven+springboot-2.7.11+lombok
路由
package com.example.entity; import lombok.Data; @Data public class Student { int sid; String name; String sex; }
package com.example.controller; import com.example.entity.Student; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; @Controller public class MainController { @RequestMapping("/index") @ResponseBody public String index() { return "coleak"; } @RequestMapping("/student") @ResponseBody public Student student(){ Student student = new Student(); student.setName("小明"); student.setSex("男"); student.setSid(10); return student; } }
return object时返回json数据 {"sid":10,"name":"小明","sex":"男"}
application.properties
server.port=80 coleak.age=19 #spring.main.banner-mode=off #spring.banner.image.location=col.jpg logging.level.root=error
@Value("${coleak.age}") int age; @RequestMapping("/index") @ResponseBody public String index() { return "coleak"+"年龄是："+age; }
安全配置
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-security</artifactId> </dependency>
spring: security: user: name: coleak password: passwd roles: - user - admin
Using generated security password: ccf78226-a571-4119-aa86-24331d99a2d6
登录后出现JSESSIONID
application.yml格式
server: port: 80 coleak: age: 19
权限配置
package com.example.config; import org.springframework.context.annotation.Configuration; import org.springframework.security.config.annotation.web.builders.HttpSecurity; import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter; @Configuration public class SecurityConfiguration extends WebSecurityConfigurerAdapter { @Override protected void configure(HttpSecurity http) throws Exception { http .authorizeRequests() .antMatchers("/login").permitAll() .anyRequest().hasRole("user") .and() .formLogin(); } }
Mybatis框架
<dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>2.2.0</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.23</version> </dependency>
@Override protected void configure(AuthenticationManagerBuilder auth) throws Exception { auth .userDetailsService(service) .passwordEncoder(new BCryptPasswordEncoder()); } @Service public class UserAuthService implements UserDetailsService { @Resource MainMapper mapper; @Override public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException { UserData data = mapper.findUserByName(username); if(data == null) throw new UsernameNotFoundException("用户 "+username+" 登录失败，用户名不存在！"); return User .withUsername(data.getUsername()) .password(data.getPassword()) .roles(data.getRole()) .build(); } } @Mapper public interface MainMapper { @Select("select * from users where username = #{username}") UserData findUserByName(String username); }
操作简化
- parent - starter - 引导类 - 内嵌tomcat
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <exclusions> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jetty</artifactId> </dependency> </dependencies>
REST开发
路径+请求方式来访问资源称为Restful
package com.example.bt3.UserController; import org.springframework.web.bind.annotation.*; import java.util.HashMap; import java.util.Map; /** * */ @RestController public class Controller { @GetMapping(value = "/student/{id}/{age}") public Object student(@PathVariable("id") Integer id, @PathVariable("age") Integer age) { Map<String,Object> map=new HashMap<>(); map.put("id",id); map.put("age",age); return map; } @DeleteMapping(value = "/student/detail/{id}/{status}") public Object student2(@PathVariable("id") Integer id, @PathVariable("status") Integer status) { Map<String,Object> map=new HashMap<>(); map.put("id",id); map.put("status",status); return map; } @DeleteMapping(value = "/student/{id}/detail/{phone}") public Object student3(@PathVariable("id") Integer id, @PathVariable("phone") Integer phone) { Map<String,Object> map=new HashMap<>(); map.put("id",id); map.put("phone",phone); return map; } @PostMapping(value = "/student/{id}") public String addStudent(@PathVariable("id") Integer id) { return "add student ID: " + id; } @PutMapping(value = "/student/{id}") public String updateStudent(@PathVariable("id") Integer id) { return "update student ID: " + id; } } //或者下面的形式 @RestController public class Controller { @RequestMapping(value = "/student/{id}/{age}",method=RequestMethod.GET) @ResponseBody public Object student(@PathVariable Integer id, @PathVariable Integer age) { Map<String,Object> map=new HashMap<>(); map.put("id",id); map.put("age",age); return map; }
package com.itheima.controller; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; //Rest模式 @RestController //@RestController=@ResponseBody+@Controller @RequestMapping("/books") public class BookController { @GetMapping //@GetMapping=@RequestMapping(method=RequestMethod.GET) public String getById(){ System.out.println("springboot is running..."); return "springboot is running..."; } }
问题解决
1.Maven加载pom的lombok一直出问题，且下载失败，需要设置Http Proxy挂代理解决
