Spring mybatis 处理业务逻辑

在实际项目中我们不仅是为了写入数据而写入数据，中间有一定的逻辑，比如，我们新增一个工艺，关于工艺代号作为唯一不能重复，我们需要对业务进行逻辑判断；那么关于逻辑应该写在Service去实现。
Dao

public interface S_apscodeMapper {
    //根据制程代号查询制程
    S_apscode findbycode(String code);
    //查询全部
    List<S_apscode> findAll();
    //新增
    int insert(@Param(value = "s_apscode")S_apscode s_apscode);
    //删除
    int deletebycode(String code);
    //修改
    int updateById(@Param(value = "s_apscode")S_apscode s_apscode);

    int update(@Param(value = "s_apscode")S_apscode s_apscode);
    //分页
    List<S_apscode> selectPage();

}

service

public interface S_apscodeService extends CurdService {
    //根据制程代号查询制程
    S_apscode findbycode(String code);
    //查询全部
    List<S_apscode> findAll();
    //根据代号删除
    HttpResult deletebycode(String code);
    //添加
    HttpResult insert(S_apscode s_apscode);
    //更新
    HttpResult update(S_apscode s_apscode);
    //分页
    PageResult findPage(PageRequest pageRequest);

}

serviceimpl
我们重点是把逻辑写在这里,我这里通过返回消息给前端处理

@Override
    public S_apscode findbycode(String code) throws RuntimeException {
        return s_apscodeMapper.findbycode(code);
    }
    
@Override
    public HttpResult insert(@Param(value = "s_apscode") S_apscode s_apscode) {
            HttpResult httpResult=new HttpResult();
            S_apscode s_apscode1=findbycode(s_apscode.getK_code());
            if (null!=s_apscode1){
                httpResult.setCode(203);
                httpResult.setMsg("Error:制程代号重复");
                httpResult.setData(null);
            }
            else
            {
                if(s_apscodeMapper.insert(s_apscode)>0){
                    httpResult.setCode(200);
                    httpResult.setMsg("sucess");
                    httpResult.setData(s_apscode);
                }
            };
            return  httpResult;
    }

附
相关类与接口

package com.cm.aps.util;

public interface HttpStatus {
    /** {@code 100 Continue} (HTTP/1.1 - RFC 2616) */
    public static final int SC_CONTINUE = 100;
    /** {@code 101 Switching Protocols} (HTTP/1.1 - RFC 2616)*/
    public static final int SC_SWITCHING_PROTOCOLS = 101;
    /** {@code 102 Processing} (WebDAV - RFC 2518) */
    public static final int SC_PROCESSING = 102;

    // --- 2xx Success ---

    /** {@code 200 OK} (HTTP/1.0 - RFC 1945) */
    public static final int SC_OK = 200;
    /** {@code 201 Created} (HTTP/1.0 - RFC 1945) */
    public static final int SC_CREATED = 201;
    /** {@code 202 Accepted} (HTTP/1.0 - RFC 1945) */
    public static final int SC_ACCEPTED = 202;
    /** {@code 203 Non Authoritative Information} (HTTP/1.1 - RFC 2616) */
    public static final int SC_NON_AUTHORITATIVE_INFORMATION = 203;
    /** {@code 204 No Content} (HTTP/1.0 - RFC 1945) */
    public static final int SC_NO_CONTENT = 204;
    /** {@code 205 Reset Content} (HTTP/1.1 - RFC 2616) */
    public static final int SC_RESET_CONTENT = 205;
    /** {@code 206 Partial Content} (HTTP/1.1 - RFC 2616) */
    public static final int SC_PARTIAL_CONTENT = 206;
    /**
     * {@code 207 Multi-Status} (WebDAV - RFC 2518)
     * or
     * {@code 207 Partial Update OK} (HTTP/1.1 - draft-ietf-http-v11-spec-rev-01?)
     */
    public static final int SC_MULTI_STATUS = 207;

    // --- 3xx Redirection ---

    /** {@code 300 Mutliple Choices} (HTTP/1.1 - RFC 2616) */
    public static final int SC_MULTIPLE_CHOICES = 300;
    /** {@code 301 Moved Permanently} (HTTP/1.0 - RFC 1945) */
    public static final int SC_MOVED_PERMANENTLY = 301;
    /** {@code 302 Moved Temporarily} (Sometimes {@code Found}) (HTTP/1.0 - RFC 1945) */
    public static final int SC_MOVED_TEMPORARILY = 302;
    /** {@code 303 See Other} (HTTP/1.1 - RFC 2616) */
    public static final int SC_SEE_OTHER = 303;
    /** {@code 304 Not Modified} (HTTP/1.0 - RFC 1945) */
    public static final int SC_NOT_MODIFIED = 304;
    /** {@code 305 Use Proxy} (HTTP/1.1 - RFC 2616) */
    public static final int SC_USE_PROXY = 305;
    /** {@code 307 Temporary Redirect} (HTTP/1.1 - RFC 2616) */
    public static final int SC_TEMPORARY_REDIRECT = 307;

    // --- 4xx Client Error ---

    /** {@code 400 Bad Request} (HTTP/1.1 - RFC 2616) */
    public static final int SC_BAD_REQUEST = 400;
    /** {@code 401 Unauthorized} (HTTP/1.0 - RFC 1945) */
    public static final int SC_UNAUTHORIZED = 401;
    /** {@code 402 Payment Required} (HTTP/1.1 - RFC 2616) */
    public static final int SC_PAYMENT_REQUIRED = 402;
    /** {@code 403 Forbidden} (HTTP/1.0 - RFC 1945) */
    public static final int SC_FORBIDDEN = 403;
    /** {@code 404 Not Found} (HTTP/1.0 - RFC 1945) */
    public static final int SC_NOT_FOUND = 404;
    /** {@code 405 Method Not Allowed} (HTTP/1.1 - RFC 2616) */
    public static final int SC_METHOD_NOT_ALLOWED = 405;
    /** {@code 406 Not Acceptable} (HTTP/1.1 - RFC 2616) */
    public static final int SC_NOT_ACCEPTABLE = 406;
    /** {@code 407 Proxy Authentication Required} (HTTP/1.1 - RFC 2616)*/
    public static final int SC_PROXY_AUTHENTICATION_REQUIRED = 407;
    /** {@code 408 Request Timeout} (HTTP/1.1 - RFC 2616) */
    public static final int SC_REQUEST_TIMEOUT = 408;
    /** {@code 409 Conflict} (HTTP/1.1 - RFC 2616) */
    public static final int SC_CONFLICT = 409;
    /** {@code 410 Gone} (HTTP/1.1 - RFC 2616) */
    public static final int SC_GONE = 410;
    /** {@code 411 Length Required} (HTTP/1.1 - RFC 2616) */
    public static final int SC_LENGTH_REQUIRED = 411;
    /** {@code 412 Precondition Failed} (HTTP/1.1 - RFC 2616) */
    public static final int SC_PRECONDITION_FAILED = 412;
    /** {@code 413 Request Entity Too Large} (HTTP/1.1 - RFC 2616) */
    public static final int SC_REQUEST_TOO_LONG = 413;
    /** {@code 414 Request-URI Too Long} (HTTP/1.1 - RFC 2616) */
    public static final int SC_REQUEST_URI_TOO_LONG = 414;
    /** {@code 415 Unsupported Media Type} (HTTP/1.1 - RFC 2616) */
    public static final int SC_UNSUPPORTED_MEDIA_TYPE = 415;
    /** {@code 416 Requested Range Not Satisfiable} (HTTP/1.1 - RFC 2616) */
    public static final int SC_REQUESTED_RANGE_NOT_SATISFIABLE = 416;
    /** {@code 417 Expectation Failed} (HTTP/1.1 - RFC 2616) */
    public static final int SC_EXPECTATION_FAILED = 417;

    /**
     * Static constant for a 418 error.
     * {@code 418 Unprocessable Entity} (WebDAV drafts?)
     * or {@code 418 Reauthentication Required} (HTTP/1.1 drafts?)
     */
    // not used
    // public static final int SC_UNPROCESSABLE_ENTITY = 418;

    /**
     * Static constant for a 419 error.
     * {@code 419 Insufficient Space on Resource}
     * (WebDAV - draft-ietf-webdav-protocol-05?)
     * or {@code 419 Proxy Reauthentication Required}
     * (HTTP/1.1 drafts?)
     */
    public static final int SC_INSUFFICIENT_SPACE_ON_RESOURCE = 419;
    /**
     * Static constant for a 420 error.
     * {@code 420 Method Failure}
     * (WebDAV - draft-ietf-webdav-protocol-05?)
     */
    public static final int SC_METHOD_FAILURE = 420;
    /** {@code 422 Unprocessable Entity} (WebDAV - RFC 2518) */
    public static final int SC_UNPROCESSABLE_ENTITY = 422;
    /** {@code 423 Locked} (WebDAV - RFC 2518) */
    public static final int SC_LOCKED = 423;
    /** {@code 424 Failed Dependency} (WebDAV - RFC 2518) */
    public static final int SC_FAILED_DEPENDENCY = 424;

    // --- 5xx Server Error ---

    /** {@code 500 Server Error} (HTTP/1.0 - RFC 1945) */
    public static final int SC_INTERNAL_SERVER_ERROR = 500;
    /** {@code 501 Not Implemented} (HTTP/1.0 - RFC 1945) */
    public static final int SC_NOT_IMPLEMENTED = 501;
    /** {@code 502 Bad Gateway} (HTTP/1.0 - RFC 1945) */
    public static final int SC_BAD_GATEWAY = 502;
    /** {@code 503 Service Unavailable} (HTTP/1.0 - RFC 1945) */
    public static final int SC_SERVICE_UNAVAILABLE = 503;
    /** {@code 504 Gateway Timeout} (HTTP/1.1 - RFC 2616) */
    public static final int SC_GATEWAY_TIMEOUT = 504;
    /** {@code 505 HTTP Version Not Supported} (HTTP/1.1 - RFC 2616) */
    public static final int SC_HTTP_VERSION_NOT_SUPPORTED = 505;

    /** {@code 507 Insufficient Storage} (WebDAV - RFC 2518) */
    public static final int SC_INSUFFICIENT_STORAGE = 507;
}

package com.cm.aps.util;

public class HttpResult {
    private int code = 200;
    private String msg;
    private Object data;

    public static com.cm.aps.util.HttpResult error() {
        return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, "未知异常，请联系管理员");
    }

    public static com.cm.aps.util.HttpResult error(String msg) {
        return error(HttpStatus.SC_INTERNAL_SERVER_ERROR, msg);
    }

    public static com.cm.aps.util.HttpResult error(int code, String msg) {
        com.cm.aps.util.HttpResult r = new com.cm.aps.util.HttpResult();
        r.setCode(code);
        r.setMsg(msg);
        return r;
    }

    public static com.cm.aps.util.HttpResult ok(String msg) {
        com.cm.aps.util.HttpResult r = new com.cm.aps.util.HttpResult();
        r.setMsg(msg);
        return r;
    }

    public static com.cm.aps.util.HttpResult ok(Object data) {
        com.cm.aps.util.HttpResult r = new com.cm.aps.util.HttpResult();
        r.setData(data);
        return r;
    }

    public static com.cm.aps.util.HttpResult ok() {
        return new com.cm.aps.util.HttpResult();
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }
}