idea springboot环境搭建 mybatis mysql数据库增删改查.zip

idea springboot mybatis mysql数据库增删改查，适合初学者（附sql文件），运行没问题，有问题的留言。

/*
Licensed to the Apache Software Foundation （ASF） under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License Version 2.0 （the
“License“）; you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing
software distributed under the License is distributed on an
“AS IS“ BASIS WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
*/

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
import java.util.Properties;

public class MavenWrapperDownloader {

    /**
     * Default URL to download the maven-wrapper.jar from if no ‘downloadUrl‘ is provided.
     */
    private static final String DEFAULT_DOWNLOAD_URL =
            “https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar“;

    /**
     * Path to the maven-wrapper.properties file which might contain a downloadUrl property to
     * use instead of the default one.
     */
    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
            “.mvn/wrapper/maven-wrapper.properties“;

    /**
     * Path where the maven-wrapper.jar will be saved to.
     */
    private static final String MAVEN_WRAPPER_JAR_PATH =
            “.mvn/wrapper/maven-wrapper.jar“;

    /**
     * Name of the property which should be used to override the default download url for the wrapper.
     */
    private static final String PROPERTY_NAME_WRAPPER_URL = “wrapperUrl“;

    public static void main（String args[]） {
        System.out.println（“- Downloader started“）;
        File baseDirectory = new File（args[0]）;
        System.out.println（“- Using base directory: “ + baseDirectory.getAbsolutePath（））;

        // If the maven-wrapper.properties exists read it and check if it contains a custom
        // wrapperUrl parameter.
        File mavenWrapperPropertyFile = new File（baseDirectory MAVEN_WRAPPER_PROPERTIES_PATH）;
        String url = DEFAULT_DOWNLOAD_URL;
        if（mavenWrapperPropertyFile.exists（）） {
            FileInputStream mavenWrapperPropertyFileInputStream = null;
            try {
                mavenWrapperPropertyFileInputStream = new FileInputStream（mavenWrapperPropertyFile）;
                Properties mavenWrapperProperties = new Properties（）;
                mavenWrapperProperties.load（mavenWrapperPropertyFileInputStream）;
                url = mavenWrapperProperties.getProperty（PROPERTY_NAME_WRAPPER_URL url）;
            } catch （IOException e） {
                System

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2019-05-24 21:55  demo\
     文件         277  2019-03-01 10:47  demo\.gitignore
     目录           0  2019-05-24 21:55  demo\.idea\
     文件         620  2019-03-01 10:50  demo\.idea\compiler.xml
     文件         172  2019-03-01 10:50  demo\.idea\encodings.xml
     目录           0  2019-03-04 20:21  demo\.idea\httpRequests\
     文件         157  2019-03-04 19:51  demo\.idea\httpRequests\2019-03-04T075126.404.json
     文件         159  2019-03-04 20:19  demo\.idea\httpRequests\2019-03-04T081949.404.json
     文件        1067  2019-03-04 20:21  demo\.idea\httpRequests\http-requests-log.http
     目录           0  2019-03-04 20:47  demo\.idea\inspectionProfiles\
     文件        1444  2019-03-04 20:47  demo\.idea\inspectionProfiles\Project_Default.xml
     目录           0  2019-05-24 14:18  demo\.idea\libraries\
     文件         592  2019-03-01 10:50  demo\.idea\libraries\Maven__ch_qos_logback_logback_classic_1_2_3.xml
     文件         571  2019-03-01 10:50  demo\.idea\libraries\Maven__ch_qos_logback_logback_core_1_2_3.xml
     文件         522  2019-05-23 22:11  demo\.idea\libraries\Maven__com_fasterxml_classmate_1_4_0.xml
     文件         644  2019-05-23 22:11  demo\.idea\libraries\Maven__com_fasterxml_jackson_core_jackson_annotations_2_9_0.xml
     文件         595  2019-05-23 22:11  demo\.idea\libraries\Maven__com_fasterxml_jackson_core_jackson_core_2_9_8.xml
     文件         623  2019-05-23 22:11  demo\.idea\libraries\Maven__com_fasterxml_jackson_core_jackson_databind_2_9_8.xml
     文件         674  2019-05-23 22:11  demo\.idea\libraries\Maven__com_fasterxml_jackson_datatype_jackson_datatype_jdk8_2_9_8.xml
     文件         688  2019-05-23 22:11  demo\.idea\libraries\Maven__com_fasterxml_jackson_datatype_jackson_datatype_jsr310_2_9_8.xml
     文件         729  2019-05-23 22:11  demo\.idea\libraries\Maven__com_fasterxml_jackson_module_jackson_module_parameter_names_2_9_8.xml
     文件         546  2019-05-23 21:55  demo\.idea\libraries\Maven__com_jayway_jsonpath_json_path_2_4_0.xml
     文件         700  2019-05-23 21:55  demo\.idea\libraries\Maven__com_vaadin_external_google_android_json_0_0_20131108_vaadin1.xml
     文件         527  2019-03-01 10:50  demo\.idea\libraries\Maven__com_zaxxer_HikariCP_3_2_0.xml
     文件         635  2019-03-01 10:50  demo\.idea\libraries\Maven__javax_annotation_javax_annotation_api_1_3_2.xml
     文件         611  2019-05-23 22:11  demo\.idea\libraries\Maven__javax_validation_validation_api_2_0_1_Final.xml
     文件         455  2019-05-23 21:55  demo\.idea\libraries\Maven__junit_junit_4_12.xml
     文件         574  2019-05-23 22:02  demo\.idea\libraries\Maven__mysql_mysql_connector_java_5_1_35.xml
     文件         536  2019-05-23 21:55  demo\.idea\libraries\Maven__net_bytebuddy_byte_buddy_1_9_10.xml
     文件         578  2019-05-23 21:55  demo\.idea\libraries\Maven__net_bytebuddy_byte_buddy_agent_1_9_10.xml
     文件         542  2019-05-23 21:55  demo\.idea\libraries\Maven__net_minidev_accessors_smart_1_2.xml
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