SpringBoot学习－（二十）SpringBoot整合Mybatis-plus

基本步骤

• 添加pom.xml依赖
• 配置application.yml
• 配置Druid
• 使用代码生成器自动生成代码

添加pom.xml依赖

<dependency>
    <groupId>com.alibabagroupId>
    <artifactId>druidartifactId>
    <version>1.1.3version>
dependency>


<dependency>
    <groupId>mysqlgroupId>
    <artifactId>mysql-connector-javaartifactId>
dependency>


<dependency>
    <groupId>com.baomidougroupId>
    <artifactId>mybatisplus-spring-boot-starterartifactId>
    <version>1.0.5version>
dependency>

<dependency>
    <groupId>com.baomidougroupId>
    <artifactId>mybatis-plusartifactId>
    <version>2.1.8version>
dependency>

<dependency>
    <groupId>org.apache.velocitygroupId>
    <artifactId>velocity-engine-coreartifactId>
    <version>2.0version>
dependency>



<dependency>
    <groupId>org.mybatis.spring.bootgroupId>
    <artifactId>mybatis-spring-boot-starterartifactId>
    <version>1.3.1version>
dependency>

配置application.yml

# 配置mybatis-plus
mybatis-plus:
  # 配置扫描xml
  mapper-locations:
    - classpath:mapper/*.xml
  # 实体扫描，多个package用逗号或者分号分隔
  type-aliases-package: com.ahut.entity
  global-config:
    # 逻辑删除配置
    logic-delete-value: 0
    logic-not-delete-value: 1
    sql-injector: com.baomidou.mybatisplus.mapper.LogicSqlInjector

配置Druid

配置druid过程不变

使用代码生成器自动生成代码

代码生成

package com.ahut.code;

import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.config.DataSourceConfig;
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.rules.DbType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;

/**
 * 
 * @ClassName: CodeGeneration
 * @Description: 代码生成器
 * @author cheng
 * @date 2018年1月25日 下午2:55:14
 */
public class CodeGeneration {

    /**
     * 
     * @Title: main
     * @Description: 生成
     * @param args
     */
    public static void main(String[] args) {
        AutoGenerator mpg = new AutoGenerator();

        // 全局配置
        GlobalConfig gc = new GlobalConfig();
        gc.setOutputDir("E://code");
        gc.setFileOverride(true);
        gc.setActiveRecord(false);// 不需要ActiveRecord特性的请改为false
        gc.setEnableCache(false);// XML 二级缓存
        gc.setBaseResultMap(true);// XML ResultMap
        gc.setBaseColumnList(false);// XML columList
        gc.setAuthor("cheng");// 作者

        // 自定义文件命名，注意 %s 会自动填充表实体属性！
        gc.setControllerName("%sAction");
        gc.setServiceName("%sService");
        gc.setServiceImplName("%sServiceImpl");
        gc.setMapperName("%sMapper");
        gc.setXmlName("%sMapper");
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setDbType(DbType.MYSQL);
        dsc.setDriverName("com.mysql.jdbc.Driver");
        dsc.setUsername("root");
        dsc.setPassword("chengrui");
        dsc.setUrl("jdbc:mysql://127.0.0.1:3306/ahutplat");
        mpg.setDataSource(dsc);

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setTablePrefix(new String[] { "sys_" });// 此处可以修改为您的表前缀
        strategy.setNaming(NamingStrategy.underline_to_camel);// 表名生成策略
        strategy.setInclude(new String[] { "sys_user" }); // 需要生成的表

        strategy.setSuperServiceClass(null);
        strategy.setSuperServiceImplClass(null);
        strategy.setSuperMapperClass(null);

        mpg.setStrategy(strategy);

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setParent("com.ahut");
        pc.setController("action");
        pc.setService("service");
        pc.setServiceImpl("serviceImpl");
        pc.setMapper("mapper");
        pc.setEntity("entity");
        pc.setXml("xml");
        mpg.setPackageInfo(pc);

        // 执行生成
        mpg.execute();

    }

}

数据库user表结构如下

改造得到生成的实体如下

package com.ahut.entity;

import java.io.Serializable;
import java.util.Date;

import com.baomidou.mybatisplus.annotations.TableField;
import com.baomidou.mybatisplus.annotations.TableId;
import com.baomidou.mybatisplus.annotations.TableName;

/**
 * 
 * @ClassName: User
 * @Description: 用户实体类
 * @author cheng
 * @date 2018年1月25日 下午3:36:06
 */
@TableName("sys_user")
public class User implements Serializable {

    private static final long serialVersionUID = 1L;

    @TableId("ID")
    private String id;

    @TableField("USER_NAME")
    private String userName;

    @TableField("USER_ACCOUNT")
    private String userAccount;

    @TableField("PASSWORD")
    private String password;

    @TableField("SORT_ID")
    private Integer sortId;

    @TableField("STATUS")
    @TableLogic
    private String status;

    @TableField("CREATE_USER")
    private String createUser;

    @TableField("CREATE_TIME")
    private Date createTime;

    @TableField("UPDATE_USER")
    private String updateUser;

    @TableField("UPDATE_TIME")
    private Date updateTime;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getUserAccount() {
        return userAccount;
    }

    public void setUserAccount(String userAccount) {
        this.userAccount = userAccount;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Integer getSortId() {
        return sortId;
    }

    public void setSortId(Integer sortId) {
        this.sortId = sortId;
    }

    public String getStatus() {
        return status;
    }

    public void setStatus(String status) {
        this.status = status;
    }

    public String getCreateUser() {
        return createUser;
    }

    public void setCreateUser(String createUser) {
        this.createUser = createUser;
    }

    public Date getCreateTime() {
        return createTime;
    }

    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }

    public String getUpdateUser() {
        return updateUser;
    }

    public void setUpdateUser(String updateUser) {
        this.updateUser = updateUser;
    }

    public Date getUpdateTime() {
        return updateTime;
    }

    public void setUpdateTime(Date updateTime) {
        this.updateTime = updateTime;
    }

    @Override
    public String toString() {
        return "User{" + ", id=" + id + ", userName=" + userName + ", userAccount=" + userAccount + ", password="
                + password + ", sortId=" + sortId + ", status=" + status + ", createUser=" + createUser
                + ", createTime=" + createTime + ", updateUser=" + updateUser + ", updateTime=" + updateTime + "}";
    }
}

改造得到生成的mapper接口如下

package com.ahut.mapper;

import java.util.Map;

import com.ahut.entity.User;
import com.baomidou.mybatisplus.mapper.BaseMapper;

/**
 * 
 * @ClassName: UserMapper
 * @Description: 用户数据访问接口
 * @author cheng
 * @date 2018年1月25日 下午3:46:22
 */
public interface UserMapper extends BaseMapper {

    /**
     * 
     * @Title: selectUserByMap
     * @Description: 多条件组合查找用户
     * @param userId
     * @return
     * @throws Exception
     */
    User selectUserByMap(Map parameterMap) throws Exception;

}

改造得到生成的xml如下

<mapper namespace="com.ahut.mapper.UserMapper">

    <resultMap id="BaseResultMap" type="com.ahut.entity.User">
        <id column="ID" property="id" />
        <result column="USER_NAME" property="userName" />
        <result column="USER_ACCOUNT" property="userAccount" />
        <result column="PASSWORD" property="password" />
        <result column="SORT_ID" property="sortId" />
        <result column="STATUS" property="status" />
        <result column="CREATE_USER" property="createUser" />
        <result column="CREATE_TIME" property="createTime" />
        <result column="UPDATE_USER" property="updateUser" />
        <result column="UPDATE_TIME" property="updateTime" />
    resultMap>

    <select id="selectUserByMap" parameterType="map" resultType="com.ahut.entity.User">
        SELECT
        ID,
        USER_NAME,
        USER_ACCOUNT,
        PASSWORD,
        SORT_ID,
        STATUS,
        CREATE_USER,
        CREATE_TIME,
        UPDATE_USER,
        UPDATE_TIME
        FROM
        SYS_USER
        WHERE STATUS = '1' 
        
        <if test="USER_ID != null and USER_ID != ''">
            AND ID = #{USER_ID}
        if>
        
        <if test="USER_ACCOUNT != null and USER_ACCOUNT != ''">
            AND USER_ACCOUNT = #{USER_ACCOUNT}
        if>
    select>

mapper>

service层

package com.ahut.mapper;

import java.util.Map;

import com.ahut.entity.User;
import com.baomidou.mybatisplus.mapper.BaseMapper;

/**
 * 
 * @ClassName: UserMapper
 * @Description: 用户数据访问接口
 * @author cheng
 * @date 2018年1月25日 下午3:46:22
 */
public interface UserMapper extends BaseMapper {

    /**
     * 
     * @Title: selectUserByMap
     * @Description: 多条件组合查找用户
     * @param userId
     * @return
     * @throws Exception
     */
    User selectUserByMap(Map parameterMap) throws Exception;

}

serviceImpl层

package com.ahut.serviceImpl;

import java.util.HashMap;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.ahut.entity.ReturnBean;
import com.ahut.entity.User;
import com.ahut.mapper.UserMapper;
import com.ahut.service.UserService;

/**
 * 
 * @ClassName: UserServiceImpl
 * @Description: 业务逻辑实现
 * @author cheng
 * @date 2018年1月25日 下午3:58:28
 */
@Service
public class UserServiceImpl implements UserService {

    /**
     * 日志管理
     */
    private static Logger log = LoggerFactory.getLogger(UserServiceImpl.class);

    /**
     * 用户数据访问接口
     */
    @Autowired
    private UserMapper userMapper;

    /**
     * 
     * @Title: addUser
     * @Description: 新增用户
     * @param user
     * @return
     * @throws Exception
     */
    public ReturnBean addUser(User user) throws Exception {
        log.info("====>>执行addUser方法");
        ReturnBean returnBean = new ReturnBean();
        // 判断参数
        if (user == null) {
            returnBean.setFailReturn("传入的参数不合法");
            return returnBean;
        }
        // 添加的结果
        int resultNum = 0;
        try {
            // 这里的insert是BaseMapper中的方法
            resultNum = userMapper.insert(user);
        } catch (Exception e) {
            log.error("依据id查找用户时发生异常", e);
            returnBean.setFailReturn("程序内部发生错误");
            return returnBean;
        }
        log.info("添加用户数:" + resultNum);
        if (resultNum == 0) {
            // 添加失败
            returnBean.setFailReturn("添加用户失败");
        } else {
            returnBean.setSuccessReturn("添加用户成功");
        }
        return returnBean;
    }

    /**
     * 
     * @Title: selectUserById
     * @Description: 依据id查找用户
     * @param userId
     * @return
     * @throws Exception
     */
    public ReturnBean selectUserById(String userId) throws Exception {
        log.info("====>>执行selectUserById方法");
        ReturnBean returnBean = new ReturnBean();
        // 判断参数是否合法
        if (userId == null || userId == "") {
            returnBean.setFailReturn("传入的参数不合法");
            return returnBean;
        }
        // 查询
        User user = null;
        Map parameterMap = new HashMap<>();
        parameterMap.put("USER_ID", userId);
        try {
            user = userMapper.selectUserByMap(parameterMap);
        } catch (Exception e) {
            log.error("依据id查找用户时发生异常", e);
            returnBean.setFailReturn("程序内部发生错误");
            return returnBean;
        }
        if (user != null) {
            // 查找到了用户信息
            returnBean.setSuccessReturn(user);
        } else {
            returnBean.setFailReturn("没有查找到此用户信息");
        }
        return returnBean;
    }

}

其中ReturnBean为自定义的返回实体类，如下

package com.ahut.entity;

import java.io.Serializable;

/**
 * 
 * @ClassName: ReturnBean
 * @Description: 返回实体类
 * @author cheng
 * @date 2018年1月25日 下午5:24:54
 */
public class ReturnBean implements Serializable {

    /**
     * 序列化
     */
    private static final long serialVersionUID = -2867756409591322259L;
    /**
     * 返回类型
     */
    private String returnType;
    /**
     * 返回结果
     */
    private Object returnValue;
    /**
     * 成功
     */
    private final String SUCCESS = "SUCCESS";
    /**
     * 失败
     */
    private final String FAIL = "FAIL";

    /**
     * 构造函数
     */
    public ReturnBean() {

    }

    /**
     * toString
     */
    @Override
    public String toString() {
        return "ReturnBean [returnType=" + returnType + ", returnValue=" + returnValue + ", SUCCESS=" + SUCCESS
                + ", FAIL=" + FAIL + "]";
    }

    /**
     * 
     * @Title: setSuccessReturn
     * @Description: 设置成功返回
     * @param returnValue
     */
    public void setSuccessReturn(Object returnValue) {
        this.returnType = this.SUCCESS;
        this.returnValue = returnValue;
    }

    /**
     * 
     * @Title: setFailReturn
     * @Description: 设置失败返回
     * @param returnValue
     */
    public void setFailReturn(Object returnValue) {
        this.returnType = this.FAIL;
        this.returnValue = returnValue;
    }

    public String getReturnType() {
        return returnType;
    }

    public void setReturnType(String returnType) {
        this.returnType = returnType;
    }

    public Object getReturnValue() {
        return returnValue;
    }

    public void setReturnValue(Object returnValue) {
        this.returnValue = returnValue;
    }

}