開始之前

源碼已上傳github：桂香驛站

版本

• springboot版本：2.1.3.RELEASE
• redis版本：3.2.1
• elasticsearch版本：6.4.3

SDK

微信小程序sdk
七牛云sdk

pom依賴

    <!--springboot依賴-->
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <!--JPA-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <!--elasticsearch-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
        </dependency>
        <!--緩存-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>
        <!--redis-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <version>2.1.3.RELEASE</version>
        </dependency>
        <!--定時(shí)任務(wù) Quartz-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-quartz</artifactId>
        </dependency>
        <!--lombok工具-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <!--微信小程序SDK-->
        <dependency>
            <groupId>com.github.binarywang</groupId>
            <artifactId>weixin-java-miniapp</artifactId>
            <version>3.3.0</version>
        </dependency>
        <!--七牛云SDK-->
        <dependency>
            <groupId>com.qiniu</groupId>
            <artifactId>qiniu-java-sdk</artifactId>
            <version>[7.2.0, 7.2.99]</version>
        </dependency>
        <!--MD5加密-->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
        <!--mysql連接-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--beanutils-->
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.9.3</version>
        </dependency>
        <!--測試-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

lombok是方便的工具圈暗，可以幫你生成get茬缩、set方法

        <!--lombok工具-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

目錄結(jié)構(gòu)

東西有點(diǎn)多蔚出，會依次說明

目錄結(jié)構(gòu)

一些工具類塞淹、異常類和枚舉類

結(jié)果枚舉類

用于返回一些錯誤信息邑蒋，與異常類配合使用

@Getter
public enum  ResultEnum {

    SUCCESS(0, "成功"),
    CODE_ERROR(1, "未獲取到code"),
    SESSION_ERROR(2, "獲取sessionKey和openid失敗"),
    SESSION_ID_NULL(3, "sessionId不存在"),
    USER_INFO_ERROR(4, "用戶信息校驗(yàn)失敗"),
    PARAM_ERROR(5, "表單參數(shù)不正確"),
    UPLOAD_ERROR(6, "文件上傳出錯"),
    ARTICLE_ID_ERROR(7, "帖子id不能為空"),
    COMMENT_ID_ERROR(8, "評論id不能為空"),
    USER_NOT_EXIT(9, "用戶不存在"),
    ARTICLE_NOT_EXIT(10, "帖子不存在"),
    COMMENT_NOT_EXIT(11, "評論不存在"),
    REPLY_NOT_EXIT(12, "回復(fù)不存在")
    ;

    private Integer code;

    private String message;

    ResultEnum(Integer code, String message) {
        this.code = code;
        this.message = message;
    }
}

異常類

用于拋出項(xiàng)目自定義的一些錯誤信息

@Data
public class BBSException extends RuntimeException {

    private Integer code;

    public BBSException(ResultEnum resultEnum) {
        super(resultEnum.getMessage());

        this.code = resultEnum.getCode();
    }

    public BBSException(Integer code, String message){
        super(message);
        this.code = code;
    }
}

返回結(jié)果類

返回http請求的結(jié)果，code可讓前端知道返回是否正常疹味，操作是否成功

/**
 * Http請求返回最外層對象
 */
@Data
public class ResultVO<T> {
    /** 錯誤碼. */
    private Integer code;

    /** 提示信息. */
    private String  msg;

    /** 具體內(nèi)容. */
    private T data;
}

返回結(jié)果工具類

用這個工具類可以方便的返回統(tǒng)一的結(jié)果

public class ResultVOUtil {

    public static ResultVO success(Object object){
        ResultVO resultVO = new ResultVO();
        resultVO.setData(object);
        resultVO.setCode(0);
        resultVO.setMsg("成功");
        return resultVO;
    }

    public static ResultVO success(){
        return success(null);
    }

    public static ResultVO error(Integer code, String msg){
        ResultVO resultVO = new ResultVO();
        resultVO.setCode(code);
        resultVO.setMsg(msg);
        return resultVO;
    }
}

生成鍵的工具類

一個方法用于生成主鍵id耍目，另一個用與加密前后端通信的sessionId，因?yàn)槲⑿挪唤ㄗh使用sessionKey作為前后端通信的token

public class KeyUtil {

    /**
     * 生成唯一的主鍵UUID
     * @return
     */
    public static synchronized String genUniqueKey(){

        return UUID.randomUUID().toString().replace("-", "").toLowerCase();
    }

    /**
     * MD5加密的sessionId
     * @param key
     * @return
     */
    public static synchronized String getSessionId(String key) {
        String sessionId = DigestUtils.md5Hex(key);
        System.out.println("MD5加密后的sessionId為：" + sessionId);
        return sessionId;
    }
}

下一章會介紹springboot-jpa進(jìn)行數(shù)據(jù)庫增刪改查~
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