[Java知识库]springboot 应用注意事项

1 准备内容

mysql安装 docker-compose.yml内容

version: '3'
 
services:
    mysql-db:
        container_name: mysql5.7
        image: mysql:5.7
 
        ports:
          - "13306:3306"
        environment:
            MYSQL_ROOT_PASSWORD: "root"
			- TZ=Asia/Shanghai
        command:
          --wait_timeout=31536000
          --interactive_timeout=31536000
          --max_connections=1000
        volumes:
          - "./mysql/data: /var/lib/mysql"
          - "./mysql/config: /etc/mysql/conf.d"

maven 换源 setting.xml

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0
                          https://maven.apache.org/xsd/settings-1.0.0.xsd">

      <mirrors>
        <mirror>  
            <id>alimaven</id>  
            <name>aliyun maven</name>  
            <url>http://maven.aliyun.com/nexus/content/groups/public/</url>  
            <mirrorOf>central</mirrorOf>          
        </mirror>  
      </mirrors>
</settings>

排除自动配置bean @SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})

pom.xml 配置druid和Hibernate验证

    <dependency>
        <groupId>com.github.drtrang</groupId>
        <artifactId>druid-spring-boot2-starter</artifactId>
        <version>1.1.10</version>
    </dependency>
    <!--Hibernate Validator验证-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-validation</artifactId>
        <version>2.5.5</version>
    </dependency>
      <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.4.3.4</version>
    </dependency>

BaseDO

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;

import java.io.Serializable;
import java.util.Date;

/**
 * 标签
 * @TableName tag
 */
@TableName(value ="tag")
@Data
public class Tag implements Serializable {
    /**
     * 
     */
    @TableId(value = "id", type = IdType.AUTO)
    private Integer id;

    /**
     * 标签名
     */
    @TableField(value = "name")
    private String name;

    /**
     * 
     */
    @TableField(value = "createTime")
    private Date createTime;

    /**
     * 是否删除 0 - 未删除 1 - 已删除
     */
    @TableField(value = "isDelete")
    private Byte isDelete;

    /**
     * 
     */
    @TableField(value = "updateTime")
    private Date updateTime;

    @TableField(exist = false)
    private static final long serialVersionUID = 1L;

    @Override
    public boolean equals(Object that) {
        if (this == that) {
            return true;
        }
        if (that == null) {
            return false;
        }
        if (getClass() != that.getClass()) {
            return false;
        }
        Tag other = (Tag) that;
        return (this.getId() == null ? other.getId() == null : this.getId().equals(other.getId()))
            && (this.getName() == null ? other.getName() == null : this.getName().equals(other.getName()))
            && (this.getCreateTime() == null ? other.getCreateTime() == null : this.getCreateTime().equals(other.getCreateTime()))
            && (this.getIsDelete() == null ? other.getIsDelete() == null : this.getIsDelete().equals(other.getIsDelete()))
            && (this.getUpdateTime() == null ? other.getUpdateTime() == null : this.getUpdateTime().equals(other.getUpdateTime()));
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((getId() == null) ? 0 : getId().hashCode());
        result = prime * result + ((getName() == null) ? 0 : getName().hashCode());
        result = prime * result + ((getCreateTime() == null) ? 0 : getCreateTime().hashCode());
        result = prime * result + ((getIsDelete() == null) ? 0 : getIsDelete().hashCode());
        result = prime * result + ((getUpdateTime() == null) ? 0 : getUpdateTime().hashCode());
        return result;
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append(getClass().getSimpleName());
        sb.append(" [");
        sb.append("Hash = ").append(hashCode());
        sb.append(", id=").append(id);
        sb.append(", name=").append(name);
        sb.append(", createTime=").append(createTime);
        sb.append(", isDelete=").append(isDelete);
        sb.append(", updateTime=").append(updateTime);
        sb.append(", serialVersionUID=").append(serialVersionUID);
        sb.append("]");
        return sb.toString();
    }
}

自动生成实体类


响应基类

import lombok.Data;

/**
 * 通用返回类
 * @param <T>
 */
@Data
public class BaseResponse<T> {

    private int code;

    private T data;

    private String message;

    public BaseResponse(int code, T data, String message) {
        this.code = code;
        this.data = data;
        this.message = message;
    }
}

响应工具类

/**
 * 响应工具类
 */
public class ResultUtils {

    /**
     * 返回成功
     * @param data
     * @param <T>
     * @return
     */
    public static <T> BaseResponse<T> success(T data) {
        return new BaseResponse<>(0, data, "ok");
    }

    /**
     * 错误
     * @param code
     * @param errorMessage
     * @param <T>
     * @return
     */
    public static <T> BaseResponse<T> error(int code, String errorMessage) {
        return new BaseResponse<>(code, null, errorMessage);
    }
}

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