开发常用

mysql符号
大于 >
小于 <

mybatisplus json格式映射

@TableField(typeHandler = JacksonTypeHandler.class)

测试类编写

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)

统一打印接口日志

@Aspect
@Component
@Slf4j
public class ControllerLogInfoAspect {

    @Autowired
    private HttpServletRequest request;

    @Pointcut("execution(public * com.tduck.cloud.api.web.controller..*.*(..))")
    public void requestAspect() {
    }

    @Before(value = "requestAspect()")
    public void methodBefore(JoinPoint joinPoint) {
        // 打印请求内容
        log.info("请求地址：[{}],请求方式：[{}]，请求类方法：[{}]，请求类方法参数：[{}]",
                request.getRequestURL().toString(), request.getMethod(),
                joinPoint.getSignature(), Arrays.toString(joinPoint.getArgs()));
    }

    /**
     * 在方法执行完结后打印返回内容
     *
     * @param o
     */
    @AfterReturning(returning = "o", pointcut = "requestAspect()")
    public void methodAfterReturn(Object o) {
        String res = JSON.toJSONString(o);
        if (res.length() > 1000) {
            res = res.substring(0, 1000);
        }
        log.info("返回数据:[{}]", res);
    }
}

大写下划线与驼峰互相转换

// 大写下划线转小写驼峰
private static final char UNICON = '_';
private static String underlineToCamel(String param) {
    if (StringUtils.isBlank(param)) {
        return "";
    }
    int len = param.length();
    StringBuilder sb = new StringBuilder(len);
    for (int i = 0; i < len; i++) {
        char c = Character.toLowerCase(param.charAt(i));
        if (c == UNICON) {
            if (++i < len) {
                sb.append(Character.toUpperCase(param.charAt(i)));
            }
        } else {
            sb.append(c);
        }
    }
    return sb.toString();
}

// 驼峰转下划线
private static final Pattern TPATTERN = Pattern.compile("[A-Z0-9]");
private static String camelToUnderline(String str) {
    Matcher matcher = TPATTERN.matcher(str);
    StringBuffer sb = new StringBuffer();
    while (matcher.find()) {
        matcher.appendReplacement(sb, "_" + matcher.group(0).toLowerCase());
    }
    matcher.appendTail(sb);
    return sb.toString();
}

springboot 手动控制事务

有些情况下难免需要手动控制事务 这个时候可以使用

@Autowired
private PlatformTransactionManager transactionManager;

// 开启事务
TransactionStatus transaction = transactionManager.getTransaction(new DefaultTransactionDefinition());
try {
    // 你的业务逻辑
    // ...
    // 提交事务
    transactionManager.commit(transaction);
} catch (Exception e) {
    // 回滚
    transactionManager.rollback(transaction);
}