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  • spring boot整合mybatis+mybatis-plus

    Spring boot对于我来说是一个刚接触的新东西,学习过程中,发现这东西还是很容易上手的,Spring boot没配置时会默认使用Spring data jpa,这东西可以说一个极简洁的工具,可是我还是比较喜欢用mybatis,工具是没有最好的,只有这合适自己的。

    说到mybatis,最近有一个很好用的工具--------mybatis-Plus(官网),现在更新的版本是2.1.2,这里使用的也是这个版本。我比较喜欢的功能是代码生成器,条件构造器,这样就可以更容易的去开发了。

    mybatisPlus官网上是有Spring boot整个的例子的,我也跟着它走了一篇,结果,程序没跑起来,后来才知道demo用的H2 database,和mysql根本不是同一样东西,所以各位想要整合mybatisPlus,可以不看官网的,可以少走弯路。

    下面就是整合的过程

    1、首先要把需要的jar文件都弄过来,pom.xml需要的东西如下

    pom.xml(不完整)

    复制代码
    <!-- mybatis-plus begin -->
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatisplus-spring-boot-starter</artifactId>
        <version>1.0.4</version>
    </dependency>
    <dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus</artifactId>
        <version>2.1.2</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
    <!-- mybatis-plus end -->
    <!-- druid阿里巴巴数据库连接池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.3</version> </dependency>
    <!--mysql-->
    <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
    </dependency>
    <dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>1.3.1</version>
    </dependency>
    复制代码

    2、添加mybatis相关的配置,如账号、密码等。这里我使用了application.yml来配。

    application.yml

    复制代码
    server:
        port: 8080
    
    #spring
    spring:
      devtools:
        restart:
          enabled: true     #这里是为了热部署的,与mybatis是无关的
    
      #DATABASE CONFIG
      datasource:
        driver-class-name: com.mysql.jdbc.Driver
        username: root
        password: root
        url: jdbc:mysql://mysqldb:3306/tdx_shop?useUnicode=true&characterEncoding=utf-8
        type: com.alibaba.druid.pool.DruidDataSource   #这里是配置druid连接池,以下都是druid的配置信息
        filters: stat,wall,log4j
        maxActive: 20
        initialSize: 1
        maxWait: 60000
        minIdle: 1
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: select 'x'
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        poolPreparedStatements: true
        maxOpenPreparedStatements: 20
        connection-properties: druid.stat.merggSql=ture;druid.stat.slowSqlMillis=5000
    
    #mybatis
    mybatis:
      mapper-locations: classpath*:/mapper/**Mapper.xml   #把xml文件放在com.XX.mapper.*中可能会出现找到的问题,这里把他放在resource下的mapper中
      #实体扫描,多个package用逗号或者分号分隔
      typeAliasesPackage: com.tdx.account_service.entity  #这里是实体类的位置
      configuration:
        map-underscore-to-camel-case: true
        cache-enabled: false
    #logging
    logging:
      level: warn
    复制代码

    配置的东西和我们以前用mybatis配置可以说差不多,但spring boot是没有xml配置文件的。注意一下红字的内容,基本没问题了。

    3、mybatis-Plus配置文件------MybatisPlusConfig,首先上图说明一下文件路径。其中MybatisPlusConfig是放在config文件夹内,而xml文件是放在resouces下mapper中。

    接着就是MybatisPlusConfig内容部分了

    1
    MybatisProperties.java
    复制代码
    package com.tdx.account_service.config;
    
    import com.alibaba.druid.pool.DruidDataSource;
    import com.alibaba.druid.support.http.StatViewServlet;
    import com.alibaba.druid.support.http.WebStatFilter;
    import com.baomidou.mybatisplus.MybatisConfiguration;
    import com.baomidou.mybatisplus.MybatisXMLLanguageDriver;
    import com.baomidou.mybatisplus.entity.GlobalConfiguration;
    import com.baomidou.mybatisplus.enums.DBType;
    import com.baomidou.mybatisplus.plugins.PaginationInterceptor;
    import com.baomidou.mybatisplus.plugins.PerformanceInterceptor;
    import com.baomidou.mybatisplus.plugins.parser.ISqlParser;
    import com.baomidou.mybatisplus.plugins.parser.ISqlParserFilter;
    import com.baomidou.mybatisplus.plugins.parser.tenant.TenantHandler;
    import com.baomidou.mybatisplus.plugins.parser.tenant.TenantSqlParser;
    import com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean;
    import com.baomidou.mybatisplus.spring.boot.starter.SpringBootVFS;
    import com.baomidou.mybatisplus.toolkit.PluginUtils;
    import net.sf.jsqlparser.expression.Expression;
    import net.sf.jsqlparser.expression.LongValue;
    import org.apache.ibatis.mapping.DatabaseIdProvider;
    import org.apache.ibatis.mapping.MappedStatement;
    import org.apache.ibatis.plugin.Interceptor;
    import org.apache.ibatis.reflection.MetaObject;
    import org.mybatis.spring.annotation.MapperScan;
    import org.mybatis.spring.boot.autoconfigure.MybatisProperties;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.bind.RelaxedPropertyResolver;
    import org.springframework.boot.context.properties.EnableConfigurationProperties;
    import org.springframework.boot.web.servlet.FilterRegistrationBean;
    import org.springframework.boot.web.servlet.ServletRegistrationBean;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.core.env.Environment;
    import org.springframework.core.io.DefaultResourceLoader;
    import org.springframework.core.io.ResourceLoader;
    import org.springframework.util.ObjectUtils;
    import org.springframework.util.StringUtils;
    
    import javax.sql.DataSource;
    import java.sql.SQLException;
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     * code is far away from bug with the animal protecting
     * ┏┓   ┏┓
     * ┏┛┻━━━┛┻┓
     * ┃       ┃
     * ┃   ━   ┃
     * ┃ ┳┛ ┗┳ ┃
     * ┃       ┃
     * ┃   ┻   ┃
     * ┃       ┃
     * ┗━┓   ┏━┛
     *   ┃   ┃神兽保佑
     *   ┃   ┃代码无BUG!
     *   ┃   ┗━━━┓
     *   ┃       ┣┓
     *   ┃       ┏┛
     *   ┗┓┓┏━┳┓┏┛
     *    ┃┫┫ ┃┫┫
     *    ┗┻┛ ┗┻┛
     *
     *
     * @Description : MybatisPlus配置
     * ---------------------------------
     * @Author : Liang.Guangqing
     * @Date : Create in 2017/9/19 13:54
     */
    @Configuration
    @EnableConfigurationProperties(MybatisProperties.class)
    public class MybatisPlusConfig {
    
        @Autowired
        private Environment environment;
        private RelaxedPropertyResolver propertyResolver;
        @Autowired
        private DataSource dataSource;
        @Autowired
        private MybatisProperties properties;
        @Autowired
        private ResourceLoader resourceLoader = new DefaultResourceLoader();
        @Autowired(required = false)
        private Interceptor[] interceptors;
        @Autowired(required = false)
        private DatabaseIdProvider databaseIdProvider;
    
        /**
         * @Description : mybatis-plus SQL执行效率插件【生产环境可以关闭】
         * ---------------------------------
         * @Author : Liang.Guangqing
         * @Date : Create in 2017/9/19 13:57
         */
        @Bean
        public PerformanceInterceptor performanceInterceptor() {
            return new PerformanceInterceptor();
        }
    
        /**
         * 配置DataSource
         * @return
         * @throws SQLException
         */
        @Bean
        public DataSource druidDataSource() throws SQLException {
            this.propertyResolver = new RelaxedPropertyResolver(environment, "spring.datasource.");
    
            System.out.println("====================注入druid!====================");
            DruidDataSource datasource = new DruidDataSource();
            datasource.setUrl(propertyResolver.getProperty("url"));
            datasource.setDriverClassName(propertyResolver.getProperty("driver-class-name"));
            datasource.setUsername(propertyResolver.getProperty("username"));
            datasource.setPassword(propertyResolver.getProperty("password"));
            datasource.setInitialSize(Integer.valueOf(propertyResolver.getProperty("initial-size")));
            datasource.setMinIdle(Integer.valueOf(propertyResolver.getProperty("min-idle")));
            datasource.setMaxWait(Long.valueOf(propertyResolver.getProperty("max-wait")));
            datasource.setMaxActive(Integer.valueOf(propertyResolver.getProperty("max-active")));
            datasource.setMinEvictableIdleTimeMillis(Long.valueOf(propertyResolver.getProperty("min-evictable-idle-time-millis")));
            try {
                datasource.setFilters(propertyResolver.getProperty("filters"));
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return datasource;
        }
    
        /**
         * @Description : mybatis-plus分页插件
         * ---------------------------------
         * @Author : Liang.Guangqing
         * @Date : Create in 2017/9/19 13:59
         */
        @Bean
        public PaginationInterceptor paginationInterceptor() {
            PaginationInterceptor page = new PaginationInterceptor();
            page.setDialectType("mysql");
            return page;
        }
    
        /**
         * 这里全部使用mybatis-autoconfigure 已经自动加载的资源。不手动指定
         * 配置文件和mybatis-boot的配置文件同步
         * @return
         */
        @Bean
        public MybatisSqlSessionFactoryBean mybatisSqlSessionFactoryBean() {
            MybatisSqlSessionFactoryBean mybatisPlus = new MybatisSqlSessionFactoryBean();
            mybatisPlus.setDataSource(dataSource);
            mybatisPlus.setVfs(SpringBootVFS.class);
            if (StringUtils.hasText(this.properties.getConfigLocation())) {
                mybatisPlus.setConfigLocation(this.resourceLoader.getResource(this.properties.getConfigLocation()));
            }
            mybatisPlus.setConfiguration(properties.getConfiguration());
            if (!ObjectUtils.isEmpty(this.interceptors)) {
                mybatisPlus.setPlugins(this.interceptors);
            }
            // MP 全局配置,更多内容进入类看注释
            GlobalConfiguration globalConfig = new GlobalConfiguration();
            globalConfig.setDbType(DBType.MYSQL.name());
            // ID 策略 AUTO->`0`("数据库ID自增") INPUT->`1`(用户输入ID") ID_WORKER->`2`("全局唯一ID") UUID->`3`("全局唯一ID")
            globalConfig.setIdType(2);
            mybatisPlus.setGlobalConfig(globalConfig);
            MybatisConfiguration mc = new MybatisConfiguration();
            mc.setDefaultScriptingLanguage(MybatisXMLLanguageDriver.class);
            mybatisPlus.setConfiguration(mc);
            if (this.databaseIdProvider != null) {
                mybatisPlus.setDatabaseIdProvider(this.databaseIdProvider);
            }
            if (StringUtils.hasLength(this.properties.getTypeAliasesPackage())) {
                mybatisPlus.setTypeAliasesPackage(this.properties.getTypeAliasesPackage());
            }
            if (StringUtils.hasLength(this.properties.getTypeHandlersPackage())) {
                mybatisPlus.setTypeHandlersPackage(this.properties.getTypeHandlersPackage());
            }
            if (!ObjectUtils.isEmpty(this.properties.resolveMapperLocations())) {
                mybatisPlus.setMapperLocations(this.properties.resolveMapperLocations());
            }
            return mybatisPlus;
        }
    
        /**
         * 注册一个StatViewServlet
         * @return
         */
        @Bean
        public ServletRegistrationBean DruidStatViewServle(){
            //org.springframework.boot.context.embedded.ServletRegistrationBean提供类的进行注册.
            ServletRegistrationBean servletRegistrationBean = new ServletRegistrationBean(new StatViewServlet(),"/druid/*");
            //添加初始化参数:initParams
            //白名单:
            // servletRegistrationBean.addInitParameter("allow","127.0.0.1");
            //IP黑名单 (存在共同时,deny优先于allow) : 如果满足deny的话提示:Sorry, you are not permitted to view this page.
            // servletRegistrationBean.addInitParameter("deny","192.168.1.73");
            //登录查看信息的账号密码.
            servletRegistrationBean.addInitParameter("loginUsername","root");
            servletRegistrationBean.addInitParameter("loginPassword","root");
            //是否能够重置数据.
            servletRegistrationBean.addInitParameter("resetEnable","false");
            return servletRegistrationBean;
        }
    
        /**
         * 注册一个:filterRegistrationBean
         *
         * @return
         */
        @Bean
        public FilterRegistrationBean druidStatFilter(){
            FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean(new WebStatFilter());
            //添加过滤规则.
            filterRegistrationBean.addUrlPatterns("/*");
            //添加不需要忽略的格式信息.
            filterRegistrationBean.addInitParameter("exclusions","*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
            return filterRegistrationBean;
        }
    
    
    
    }
    复制代码

    这里是完整的配置文件,需要注意的是引入的包,别引错了!

    4、还要开启dao的扫描,很简单,就是在启动文件中添加@MapperScan("com.tdx.account_service.dao*"),如下是完整的

    到这里,配置算是完成了,运行一下项目是可以运行起来的。

    我觉得Mybatis-Plus最好玩得应该是代码生成器这部分内容,下面是代码生成器的使用过程

    pom.xml上要加点东西

    <dependency>
        <groupId>org.apache.velocity</groupId>
        <artifactId>velocity-engine-core</artifactId>
        <version>2.0</version>
    </dependency>

    1、代码生成器的配置文件

    MybatisPlusConfig.java
    复制代码
    /**
     * Copyright (c) 2011-2016, hubin (jobob@qq.com).
     * <p>
     * Licensed 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
     * <p>
     * http://www.apache.org/licenses/LICENSE-2.0
     * <p>
     * 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.
     */
    package com.tdx.account_service.generator;
    
    import java.io.File;
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    
    import com.baomidou.mybatisplus.enums.FieldFill;
    import com.baomidou.mybatisplus.generator.AutoGenerator;
    import com.baomidou.mybatisplus.generator.InjectionConfig;
    import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
    import com.baomidou.mybatisplus.generator.config.FileOutConfig;
    import com.baomidou.mybatisplus.generator.config.GlobalConfig;
    import com.baomidou.mybatisplus.generator.config.PackageConfig;
    import com.baomidou.mybatisplus.generator.config.StrategyConfig;
    import com.baomidou.mybatisplus.generator.config.TemplateConfig;
    import com.baomidou.mybatisplus.generator.config.converts.MySqlTypeConvert;
    import com.baomidou.mybatisplus.generator.config.po.TableFill;
    import com.baomidou.mybatisplus.generator.config.po.TableInfo;
    import com.baomidou.mybatisplus.generator.config.rules.DbColumnType;
    import com.baomidou.mybatisplus.generator.config.rules.DbType;
    import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
    
    /**
     *code is far away from bug with the animal protecting
     *  ┏┓   ┏┓
     *┏┛┻━━━┛┻┓
     *┃       ┃  
     *┃   ━   ┃
     *┃ ┳┛ ┗┳ ┃
     *┃       ┃
     *┃   ┻   ┃
     *┃       ┃
     *┗━┓   ┏━┛
     *  ┃   ┃神兽保佑
     *  ┃   ┃代码无BUG!
     *  ┃   ┗━━━┓
     *  ┃       ┣┓
     *  ┃       ┏┛
     *  ┗┓┓┏━┳┓┏┛
     *   ┃┫┫ ┃┫┫
     *   ┗┻┛ ┗┻┛
     *  
     *   @Description : MybatisPlus代码生成器
     *   ---------------------------------
     *   @Author : Liang.Guangqing
     *   @Date : Create in 2017/9/19 14:48 
     */
    public class MysqlGenerator {
    
        private static String packageName="account_service";    //文件路径
        private static String authorName="Liang.Guangqing";     //作者
        private static String table="sc_user";                  //table名字
        private static String prefix="sc_";                     //table前缀
        private static File file = new File(packageName);
        private static String path = file.getAbsolutePath();
    
        public static void main(String[] args) {
            // 自定义需要填充的字段
            List<TableFill> tableFillList = new ArrayList<>();
            tableFillList.add(new TableFill("ASDD_SS", FieldFill.INSERT_UPDATE));
            // 代码生成器
            AutoGenerator mpg = new AutoGenerator().setGlobalConfig(
                    // 全局配置
                    new GlobalConfig()
                            .setOutputDir(path+"/src/main/java")//输出目录
                            .setFileOverride(true)// 是否覆盖文件
                            .setActiveRecord(true)// 开启 activeRecord 模式
                            .setEnableCache(false)// XML 二级缓存
                            .setBaseResultMap(true)// XML ResultMap
                            .setBaseColumnList(true)// XML columList
                            .setOpen(false)//生成后打开文件夹
                            .setAuthor(authorName)
                    // 自定义文件命名,注意 %s 会自动填充表实体属性!
                     .setMapperName("%sMapper")
                     .setXmlName("%sMapper")
                     .setServiceName("%sService")
                     .setServiceImplName("%sServiceImpl")
                     .setControllerName("%sController")
            ).setDataSource(
                    // 数据源配置
                    new DataSourceConfig()
                            .setDbType(DbType.MYSQL)// 数据库类型
                            .setTypeConvert(new MySqlTypeConvert() {
                                // 自定义数据库表字段类型转换【可选】
                                @Override
                                public DbColumnType processTypeConvert(String fieldType) {
                                    System.out.println("转换类型:" + fieldType);
                                    // if ( fieldType.toLowerCase().contains( "tinyint" ) ) {
                                    //    return DbColumnType.BOOLEAN;
                                    // }
                                    return super.processTypeConvert(fieldType);
                                }
                            })
                            .setDriverName("com.mysql.jdbc.Driver")
                            .setUsername("root")
                            .setPassword("root")
                            .setUrl("jdbc:mysql://127.0.0.1:3306/tdx_shop?characterEncoding=utf8")
            ).setStrategy(
                    // 策略配置
                    new StrategyConfig()
                            // .setCapitalMode(true)// 全局大写命名
                            //.setDbColumnUnderline(true)//全局下划线命名
                            .setTablePrefix(new String[]{prefix})// 此处可以修改为您的表前缀
                            .setNaming(NamingStrategy.underline_to_camel)// 表名生成策略
                            .setInclude(new String[] { table }) // 需要生成的表
                            .setRestControllerStyle(true)
                            //.setExclude(new String[]{"test"}) // 排除生成的表
                            // 自定义实体父类
                            // .setSuperEntityClass("com.baomidou.demo.TestEntity")
                            // 自定义实体,公共字段
                            //.setSuperEntityColumns(new String[]{"test_id"})
                            .setTableFillList(tableFillList)
                    // 自定义 mapper 父类
                    // .setSuperMapperClass("com.baomidou.demo.TestMapper")
                    // 自定义 service 父类
                    // .setSuperServiceClass("com.baomidou.demo.TestService")
                    // 自定义 service 实现类父类
                    // .setSuperServiceImplClass("com.baomidou.demo.TestServiceImpl")
                    // 自定义 controller 父类
                    .setSuperControllerClass("com.tdx."+packageName+".controller.AbstractController")
                    // 【实体】是否生成字段常量(默认 false)
                    // public static final String ID = "test_id";
                    // .setEntityColumnConstant(true)
                    // 【实体】是否为构建者模型(默认 false)
                    // public User setName(String name) {this.name = name; return this;}
                    // .setEntityBuilderModel(true)
                    // 【实体】是否为lombok模型(默认 false)<a href="https://projectlombok.org/">document</a>
                    // .setEntityLombokModel(true)
                    // Boolean类型字段是否移除is前缀处理
                    // .setEntityBooleanColumnRemoveIsPrefix(true)
                    // .setRestControllerStyle(true)
                    // .setControllerMappingHyphenStyle(true)
            ).setPackageInfo(
                    // 包配置
                    new PackageConfig()
                            //.setModuleName("User")
                            .setParent("com.tdx."+packageName)// 自定义包路径
                            .setController("controller")// 这里是控制器包名,默认 web
                            .setEntity("entity")
                            .setMapper("dao")
                            .setService("service")
                            .setServiceImpl("service.impl")
                            //.setXml("mapper")
            ).setCfg(
                    // 注入自定义配置,可以在 VM 中使用 cfg.abc 设置的值
                    new InjectionConfig() {
                        @Override
                        public void initMap() {
                            Map<String, Object> map = new HashMap<>();
                            map.put("abc", this.getConfig().getGlobalConfig().getAuthor() + "-mp");
                            this.setMap(map);
                        }
                    }.setFileOutConfigList(Collections.<FileOutConfig>singletonList(new FileOutConfig("/templates/mapper.xml.vm") {
                        // 自定义输出文件目录
                        @Override
                        public String outputFile(TableInfo tableInfo) {
                            return path+"/src/main/resources/mapper/" + tableInfo.getEntityName() + "Mapper.xml";
                        }
                    }))
            ).setTemplate(
                    // 关闭默认 xml 生成,调整生成 至 根目录
                    new TemplateConfig().setXml(null)
                    // 自定义模板配置,模板可以参考源码 /mybatis-plus/src/main/resources/template 使用 copy
                    // 至您项目 src/main/resources/template 目录下,模板名称也可自定义如下配置:
                    // .setController("...");
                    // .setEntity("...");
                    // .setMapper("...");
                    // .setXml("...");
                    // .setService("...");
                    // .setServiceImpl("...");
            );
    
            // 执行生成
            mpg.execute();
    
            // 打印注入设置,这里演示模板里面怎么获取注入内容【可无】
            System.err.println(mpg.getCfg().getMap().get("abc"));
        }
    
    }
    复制代码

    文件中修改的内容还是很多的,最主要的还是mysql的连接信息,没理由你账号,密码都错了还能连得上吧,其次设置一下你生成的模板文件路径,我这里生成的路径在上面图可以看得到,是在com.tdx.account_service下的,注意,xml文件要放在resources下,不然是识别的,说找不到这个方法

    按照官网的代码模板生成的文件基本是白白的,主要是mybatis-Plus集成了公共方法,很多常用的工具都可以引用了。在这里我提供一下我修改后Controller.java.vm文件,主要还是按照我自己的习惯去弄的

    controller.java.vm

    复制代码
    package ${package.Controller};
    
    
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestParam;
    
    #if(${restControllerStyle})
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.RestController;
    #else
    import org.springframework.stereotype.Controller;
    #end
    #if(${superControllerClassPackage})
    import ${superControllerClassPackage};
    #end
    import org.springframework.beans.factory.annotation.Autowired;
    import com.baomidou.mybatisplus.mapper.EntityWrapper;
    import com.baomidou.mybatisplus.plugins.Page;
    import ${package.Service}.${table.serviceName};
    import ${package.Entity}.common.DatatablesJSON;
    import ${package.Entity}.common.JSONResult;
    import ${package.Entity}.${entity};
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    /**
     *code is far away from bug with the animal protecting
     *  ┏┓   ┏┓
     *┏┛┻━━━┛┻┓
     *┃       ┃  
     *┃   ━   ┃
     *┃ ┳┛ ┗┳ ┃
     *┃       ┃
     *┃   ┻   ┃
     *┃       ┃
     *┗━┓   ┏━┛
     *  ┃   ┃神兽保佑
     *  ┃   ┃代码无BUG!
     *  ┃   ┗━━━┓
     *  ┃       ┣┓
     *  ┃       ┏┛
     *  ┗┓┓┏━┳┓┏┛
     *   ┃┫┫ ┃┫┫
     *   ┗┻┛ ┗┻┛
     *  
     *   @description : ${entity} 控制器
     *   ---------------------------------
     *      @author ${author}
     *   @since ${date}
     */
    #if(${restControllerStyle})
    @RestController
    #else
    @Controller
    #end
    @RequestMapping("#if(${package.ModuleName})/${package.ModuleName}#end/#if(${controllerMappingHyphenStyle})${controllerMappingHyphen}#else${table.entityPath}#end")
    #if(${superControllerClass})
    public class ${table.controllerName} extends ${superControllerClass} {
    #else
    public class ${table.controllerName} {
    #end
        private final Logger logger = LoggerFactory.getLogger(${table.controllerName}.class);
    
        @Autowired
        public ${table.serviceName} ${table.entityPath}Service;
    
        /**
         * @description : 获取分页列表
         * ---------------------------------
         * @author : ${author}
         * @since : Create in ${date}
         */
        @RequestMapping(value = "/get${entity}List",method = RequestMethod.POST)
        public Object get${entity}List(${entity} param , @RequestParam(value = "draw",defaultValue = "0") Integer draw,
                                            @RequestParam(value = "length") Integer length,
                                            @RequestParam(value = "start") Integer start) {
                DatatablesJSON<${entity}> resJson=new DatatablesJSON<>();
                try {
                    Integer pageNo=getPageNo(start,length);
                    Page<${entity}> page=new Page<${entity}>(pageNo,length);
                    ${table.entityPath}Service.selectPage(page,new EntityWrapper<${entity}>(param));
                    resJson.setDraw(draw++);
                    resJson.setRecordsTotal(page.getTotal());
                    resJson.setRecordsFiltered(page.getTotal());
                    resJson.setData(page.getRecords());
                    resJson.setSuccess(true);
                }catch (Exception e){
                    resJson.setSuccess(false);
                    resJson.setError("异常信息:{"+e.getClass().getName()+"}");
                    logger.info("异常信息:{}"+e.getMessage());
                }
                return resJson;
        }
    
        /**
         * @description : 通过id获取${entity}
         * ---------------------------------
         * @author : ${author}
         * @since : Create in ${date}
         */
        @RequestMapping(value = "/get${entity}ById",method = RequestMethod.GET)
        public Object get${entity}ById(String id) {
                JSONResult<${entity}> resJson = new JSONResult<>();
                try {
                    ${entity} param= ${table.entityPath}Service.selectById(id);
                    resJson.setData(param);
                    resJson.setSuccess(true);
                }catch (Exception e) {
                    resJson.setSuccess(false);
                    resJson.setMessage("异常信息:{"+e.getClass().getName()+"}");
                    logger.info("异常信息:{}"+e.getMessage());
                }
                return resJson;
        }
    
        /**
         * @description : 通过id删除${entity}
         * ---------------------------------
         * @author : ${author}
         * @since : Create in ${date}
         */
        @RequestMapping(value = "/delete${entity}ById",method = RequestMethod.GET)
        public Object delete${entity}ById(String id) {
                JSONResult<${entity}> resJson = new JSONResult<>();
                try{
                    resJson.setSuccess(${table.entityPath}Service.deleteById(id));
                }catch (Exception e) {
                    resJson.setSuccess(false);
                    resJson.setMessage("异常信息:{"+e.getClass().getName()+"}");
                    logger.info("异常信息:{}"+e.getMessage());
                }
                return resJson;
        }
    
        /**
         * @description : 通过id更新${entity}
         * ---------------------------------
         * @author : ${author}
         * @since : Create in ${date}
         */
        @RequestMapping(value = "/update${entity}ById",method = RequestMethod.POST)
        public Object update${entity}ById(${entity} param) {
                JSONResult<${entity}> resJson = new JSONResult<>();
                try{
                    resJson.setSuccess(${table.entityPath}Service.updateById(param));
                }catch (Exception e) {
                    resJson.setSuccess(false);
                    resJson.setMessage("异常信息:{"+e.getClass().getName()+"}");
                    logger.info("异常信息:{}"+e.getMessage());
                }
                return resJson;
        }
    
        /**
         * @description : 添加${entity}
         * ---------------------------------
         * @author : ${author}
         * @since : Create in ${date}
         */
        @RequestMapping(value = "/add${entity}",method = RequestMethod.POST)
        public Object add${entity}(${entity} param) {
                JSONResult<${entity}> resJson = new JSONResult<>();
                try{
                    resJson.setSuccess(${table.entityPath}Service.insert(param));
                }catch (Exception e) {
                    resJson.setSuccess(false);
                    resJson.setMessage("异常信息:{"+e.getClass().getName()+"}");
                    logger.info("异常信息:{}"+e.getMessage());
                }
                return resJson;
        }
    }
    复制代码

    除了这个文件,其他代码模板我都是按照官网那样的,这里引用3个外部的文件,有AbstractController.java(控制器基类)、DatatablesJSON.java和JSONResult.java,然后这些文件又引用了其他文件,我懵逼了,怎么文件这么多啊,看来如果全部都贴上来得多占地方啊,所以我选择相信码云,如果需要请在码云上按照少的文件下载,码云地址。需要注意的是,我的模板是直接代替了mybatis-plus.jar中的templates目录。

    最后就到了测试过程

    下面的代码段都是放在Controller文件里面,然后启动程序,对应端口,请求方法。测试的话是需要按照自己的实体类操作的,所以仅供参考。

    复制代码
        /**
         * 分页 PAGE
         */
        @GetMapping("/test")
        public Page<User> test() {
            return userService.selectPage(new Page<User>(0, 12));
        }
    
        /**
         * AR 部分测试
         */
        @GetMapping("/test1")
        public Page<User> test1() {
            User user = new User();
            System.err.println("删除所有:" + user.delete(null));
            //user.setId(2017091801L);
            user.setAccout("test"+num++);
            user.setType("test");
            user.setCreateTime(new Date());
            user.setPhone("13111110000");
            user.setPassword("123456");
            user.setNickname("guangqing"+2*num++);
            user.insert();
            System.err.println("查询插入结果:" + user.selectById().toString());
            //user.setNickname("mybatis-plus-ar");
            System.err.println("更新:" + user.updateById());
            return user.selectPage(new Page<User>(0, 12), null);
        }
    
        /**
         * 增删改查 CRUD
         */
        @GetMapping("/test2")
        public User test2() {
            User user = new User();
            user.setId(123456L);
            user.setAccout("test");
            user.setType("test");
            user.setCreateTime(new Date());
            user.setPhone("13111110000");
            user.setPassword("123456");
            user.setNickname("guangqing");
            System.err.println("删除一条数据:" + userService.deleteById(1L));
            System.err.println("插入一条数据:" + userService.insert(user));
            User user2 = new User();
            user.setId(223456L);
            user.setAccout("test2");
            user.setType("test");
            user.setCreateTime(new Date());
            user.setPhone("13111110000");
            user.setPassword("123456");
            user.setNickname("guangqing");
            boolean result = userService.insert(user);
            // 自动回写的ID
            Long id = user.getId();
            System.err.println("插入一条数据:" + result + ", 插入信息:" + user.toString());
            System.err.println("查询:" + userService.selectById(id).toString());
            Page<User> userListPage = userService.selectPage(new Page<User>(1, 5), new EntityWrapper<>(new User()));
            System.err.println("total=" + userListPage.getTotal() + ", current list size=" + userListPage.getRecords().size());
            return userService.selectById(1L);
        }
    
        @GetMapping("testSelect")
        public Object testSelect() {
            Integer start = 0;
            Integer length =10;
            User param = new User();
            //param.setNickname("guangqing2");
            Integer pageNo=getPageNo(start,length);
            Page<User> page =new Page<User>(pageNo,length);
            EntityWrapper<User> ew = new EntityWrapper<User>();
            ew.setEntity(param);
            ew.where("password={0}","123456")
                    .like("nickname","guangqing")
                    .ge("create_time","2017-09-21 15:50:00");
            userService.selectPage(page, ew);
            DatatablesJSON<User> resJson= new DatatablesJSON<>();
            //resJson.setDraw(draw++);
            resJson.setRecordsTotal(page.getTotal());
            resJson.setRecordsFiltered(page.getTotal());
            resJson.setData(page.getRecords());
            return resJson;
        }
    
    
        @GetMapping("/selectsql")
        public Object getUserBySql() {
            JSONObject result = new JSONObject();
            result.put("records", userService.selectListBySQL());
            return result;
        }
    
        /**
         * 7、分页 size 一页显示数量  current 当前页码
         * 方式一:http://localhost:8080/user/page?size=1&current=1<br>
         * 方式二:http://localhost:8080/user/pagehelper?size=1&current=1<br>
         */
    
        // 参数模式分页
        @GetMapping("/page")
        public Object page(Page page) {
            return userService.selectPage(page);
        }
    
        // ThreadLocal 模式分页
        @GetMapping("/pagehelper")
        public Object pagehelper(Page page) {
            PageHelper.setPagination(page);
            page.setRecords(userService.selectList(null));
            page.setTotal(PageHelper.freeTotal());//获取总数并释放资源 也可以 PageHelper.getTotal()
            return page;
        }
    
    
        /**
         * 测试事物
         * http://localhost:8080/user/test_transactional<br>
         * 访问如下并未发现插入数据说明事物可靠!!<br>
         * http://localhost:8080/user/test<br>
         * <br>
         * 启动  Application 加上 @EnableTransactionManagement 注解其实可无默认貌似就开启了<br>
         * 需要事物的方法加上 @Transactional 必须的哦!!
         */
        @Transactional
        @GetMapping("/test_transactional")
        public void testTransactional() {
            //userService.insert(new User(1000L, "测试事物", 16, 3));
            System.out.println(" 这里手动抛出异常,自动回滚数据");
            throw new RuntimeException();
        }
    复制代码

    这么多的测试,我觉得最有趣的是条件构造器,在官网上有更齐全的,而我这里是按照我自己的需求写的。

    最后谢谢大家的观看,写博客经验不足,写得不好请见谅,如果能给你带来帮助请点个赞,若遇到不明白的,或者我有写错的地方请提出,谢谢!

    引自https://www.cnblogs.com/lianggp/p/7573653.html

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  • 原文地址:https://www.cnblogs.com/pangguoming/p/7985644.html
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