JavaWeb开发教程: SpringBootWeb-SpingBoot原理-2023.4.5坚持第38天

前言

记录时间：2023.4.5

已坚持学习第38天

java从入门到精通

学习java时间历程记录打卡

早上7：00到 12：00

下午2：00到 6：00

JavaWeb-SpringBootWeb-SpingBoot原理总结

完成代码练习

bean的管理

1.config

CommonConfig

package cn.vqqc.config;

import cn.vqqc.service.DeptService;
import org.dom4j.io.SAXReader;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration //配置类
public class CommonConfig {

    //声明第三方bean
    @Bean //将当前方法的返回值对象交给IOC容器管理, 成为IOC容器bean
          //通过@Bean注解的name/value属性指定bean名称, 如果未指定, 默认是方法名
    public SAXReader reader(DeptService deptService){
        System.out.println(deptService);
        return new SAXReader();
    }

}

2.controller

DeptController

package cn.vqqc.controller;

import cn.vqqc.pojo.Result;
import cn.vqqc.pojo.Dept;
import cn.vqqc.service.DeptService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.web.bind.annotation.*;
import java.util.List;


//@Lazy
@Scope("prototype")
@RestController
@RequestMapping("/depts")
public class DeptController {

    @Autowired
    private DeptService deptService;

    public DeptController(){
        System.out.println("DeptController constructor ....");
    }

    @GetMapping
    public Result list(){
        List<Dept> deptList = deptService.list();
        return Result.success(deptList);
    }

    @DeleteMapping("/{id}")
    public Result delete(@PathVariable Integer id)  {
        deptService.delete(id);
        return Result.success();
    }

    @PostMapping
    public Result save(@RequestBody Dept dept){
        deptService.save(dept);
        return Result.success();
    }
}

3.mapper

DeptMapper

package cn.vqqc.mapper;

import cn.vqqc.pojo.Dept;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;
import java.util.List;

@Mapper
public interface DeptMapper {
    //查询全部部门数据
    @Select("select * from dept")
    List<Dept> list();

    //删除部门
    @Delete("delete from dept where id = #{id}")
    void delete(Integer id);

    //新增部门
    @Insert("insert into dept(name, create_time, update_time) values (#{name},#{createTime},#{updateTime})")
    void save(Dept dept);
}

4.pojo

1.Dept

package cn.vqqc.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.time.LocalDateTime;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Dept {
    private Integer id;
    private String name;
    private LocalDateTime createTime;
    private LocalDateTime updateTime;
}

2.Result

package cn.vqqc.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class Result {
    private Integer code;//响应码，1 代表成功; 0 代表失败
    private String msg;  //响应码 描述字符串
    private Object data; //返回的数据

    //增删改 成功响应
    public static Result success(){
        return new Result(1,"success",null);
    }
    //查询 成功响应
    public static Result success(Object data){
        return new Result(1,"success",data);
    }
    //失败响应
    public static Result error(String msg){
        return new Result(0,msg,null);
    }
}

5.service

1.DeptServiceImpl

package cn.vqqc.service.impl;

import cn.vqqc.mapper.DeptMapper;
import cn.vqqc.pojo.Dept;
import cn.vqqc.service.DeptService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Slf4j
@Service
public class DeptServiceImpl implements DeptService {
    @Autowired
    private DeptMapper deptMapper;

    @Override
    public List<Dept> list() {
        List<Dept> deptList = deptMapper.list();
        return deptList;
    }

    @Override
    public void delete(Integer id) {
        deptMapper.delete(id);
    }

    @Override
    public void save(Dept dept) {
        dept.setCreateTime(LocalDateTime.now());
        dept.setUpdateTime(LocalDateTime.now());
        deptMapper.save(dept);
    }
}

2.DeptService

package cn.vqqc.service;

import cn.vqqc.pojo.Dept;

import java.util.List;

public interface DeptService {
    /**
     * 查询所有的部门数据
     * @return
     */
    List<Dept> list();

    /**
     * 删除部门
     * @param id
     */
    void delete(Integer id);

    /**
     * 新增部门
     * @param dept
     */
    void save(Dept dept);
}

6.SpringbootWebConfig2Application

package cn.vqqc;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringbootWebConfig2Application {

    public static void main(String[] args) {
        SpringApplication.run(SpringbootWebConfig2Application.class, args);
    }

//    //声明第三方bean
//    @Bean //将当前方法的返回值对象交给IOC容器管理, 成为IOC容器bean
//    public SAXReader saxReader(){
//        return new SAXReader();
//    }
}

7.SpringbootWebConfig2ApplicationTests

package cn.vqqc;

import cn.vqqc.controller.DeptController;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ApplicationContext;

@SpringBootTest
class SpringbootWebConfig2ApplicationTests {

    @Autowired
    private ApplicationContext applicationContext; //IOC容器对象

    //获取bean对象
    @Test
    public void testGetBean(){
        //根据bean的名称获取
        DeptController bean1 = (DeptController) applicationContext.getBean("deptController");
        System.out.println(bean1);

        //根据bean的类型获取
        DeptController bean2 = applicationContext.getBean(DeptController.class);
        System.out.println(bean2);

        //根据bean的名称 及 类型获取
        DeptController bean3 = applicationContext.getBean("deptController", DeptController.class);
        System.out.println(bean3);
    }


    //bean的作用域
    @Test
    public void testScope(){
        for (int i = 0; i < 10; i++) {
            DeptController deptController = applicationContext.getBean(DeptController.class);
            System.out.println(deptController);
        }
    }

    @Autowired
    private SAXReader saxReader;

    //第三方bean的管理
    @Test
    public void testThirdBean() throws Exception {
        //SAXReader saxReader = new SAXReader();

        Document document = saxReader.read(this.getClass().getClassLoader().getResource("1.xml"));
        Element rootElement = document.getRootElement();
        String name = rootElement.element("name").getText();
        String age = rootElement.element("age").getText();

        System.out.println(name + " : " + age);
    }


    @Test
    public void testGetBean2(){
        Object saxReader = applicationContext.getBean("reader");
        System.out.println(saxReader);
    }
}

8.pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.itheima</groupId>
    <artifactId>springboot-web-config2</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>11</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <!--mybatis起步依赖-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.2.2</version>
        </dependency>

        <!--mysql驱动-->
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!--JWT令牌-->
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.9.1</version>
        </dependency>

        <!--fastJSON-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.76</version>
        </dependency>

        <!--Dom4j-->
        <dependency>
            <groupId>org.dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>2.1.3</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

自定义starter

1.com.aliyun.oss

1.AliOSSAutoConfiguration

package com.aliyun.oss;

import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
@EnableConfigurationProperties(AliOSSProperties.class)
public class AliOSSAutoConfiguration {

    @Bean
    public AliOSSUtils aliOSSUtils(AliOSSProperties aliOSSProperties){
        AliOSSUtils aliOSSUtils = new AliOSSUtils();
        aliOSSUtils.setAliOSSProperties(aliOSSProperties);
        return aliOSSUtils;
    }

}

2.AliOSSProperties

package com.aliyun.oss;

import org.springframework.boot.context.properties.ConfigurationProperties;

@ConfigurationProperties(prefix = "aliyun.oss")
public class AliOSSProperties {
    private String endpoint;
    private String accessKeyId;
    private String accessKeySecret;
    private String bucketName;

    public String getEndpoint() {
        return endpoint;
    }

    public void setEndpoint(String endpoint) {
        this.endpoint = endpoint;
    }

    public String getAccessKeyId() {
        return accessKeyId;
    }

    public void setAccessKeyId(String accessKeyId) {
        this.accessKeyId = accessKeyId;
    }

    public String getAccessKeySecret() {
        return accessKeySecret;
    }

    public void setAccessKeySecret(String accessKeySecret) {
        this.accessKeySecret = accessKeySecret;
    }

    public String getBucketName() {
        return bucketName;
    }

    public void setBucketName(String bucketName) {
        this.bucketName = bucketName;
    }
}

3.AliOSSUtils

package com.aliyun.oss;

import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.io.InputStream;
import java.util.UUID;

/**
 * 阿里云 OSS 工具类
 */
public class AliOSSUtils {

//    @Value("${aliyun.oss.endpoint}")
//    private String endpoint ;
//    @Value("${aliyun.oss.accessKeyId}")
//    private String accessKeyId ;
//    @Value("${aliyun.oss.accessKeySecret}")
//    private String accessKeySecret ;
//    @Value("${aliyun.oss.bucketName}")
//    private String bucketName ;

    private AliOSSProperties aliOSSProperties;

    public AliOSSProperties getAliOSSProperties() {
        return aliOSSProperties;
    }

    public void setAliOSSProperties(AliOSSProperties aliOSSProperties) {
        this.aliOSSProperties = aliOSSProperties;
    }

    /**
     * 实现上传图片到OSS
     */
    public String upload(MultipartFile file) throws IOException {
        //获取阿里云OSS参数
        String endpoint = aliOSSProperties.getEndpoint();
        String accessKeyId = aliOSSProperties.getAccessKeyId();
        String accessKeySecret = aliOSSProperties.getAccessKeySecret();
        String bucketName = aliOSSProperties.getBucketName();

        // 获取上传的文件的输入流
        InputStream inputStream = file.getInputStream();

        // 避免文件覆盖
        String originalFilename = file.getOriginalFilename();
        String fileName = UUID.randomUUID().toString() + originalFilename.substring(originalFilename.lastIndexOf("."));

        //上传文件到 OSS
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
        ossClient.putObject(bucketName, fileName, inputStream);

        //文件访问路径
        String url = endpoint.split("//")[0] + "//" + bucketName + "." + endpoint.split("//")[1] + "/" + fileName;
        // 关闭ossClient
        ossClient.shutdown();
        return url;// 把上传到oss的路径返回
    }

}

2.pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>com.aliyun.oss</groupId>
    <artifactId>aliyun-oss-spring-boot-autoconfigure</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>11</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!--阿里云OSS-->
        <dependency>
            <groupId>com.aliyun.oss</groupId>
            <artifactId>aliyun-sdk-oss</artifactId>
            <version>3.15.1</version>
        </dependency>
        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
            <version>2.3.1</version>
        </dependency>
        <dependency>
            <groupId>javax.activation</groupId>
            <artifactId>activation</artifactId>
            <version>1.1.1</version>
        </dependency>
        <!-- no more than 2.3.3-->
        <dependency>
            <groupId>org.glassfish.jaxb</groupId>
            <artifactId>jaxb-runtime</artifactId>
            <version>2.3.3</version>
        </dependency>
    </dependencies>

</project>