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帶你搭建一個簡單的mybatis項目：IDEA+spring+springMVC+mybatis+Mysql

本文轉載自   查看原文   2020-03-31 16:34   596    ZAE/mybatis

最近小編有點閑，突發奇想想重溫一下mybatis，然后在腦海中搜索了一下，納尼，居然不太會用了，想到這里都是淚啊！！現在我所呆的的公司使用的是springboot+hebinate，編程都是使用的JPA語義化編程，都用不上mybatis了，時隔近8個月的時間沒用它，它竟然想溜，然而畢竟它曾經來過，我怎么能輕易讓它走，於是決定自己搭建一個，重溫一下mybatis的使用，不過幸好的是，還真讓我搭建成功了，廢話不多說，上流程。

代碼已經同步gitHub上：https://github.com/Slience-zae/mybatis-no-one.git

1、創建項目

在這里使用的是IDEA，首先就是搭建項目的老一套流程，file -> new -> project ->maven,一路next，按圖填寫完后直接next就好

 

 

 2.添加依賴

找到pom文件，將下面的依賴加入到pom文件中，這個依賴就相當於我們在搭建普通項目時使用的jar包

 <!-- 用來設置版本號 -->
    <properties>
        <srping.version>4.0.2.RELEASE</srping.version>
        <mybatis.version>3.2.8</mybatis.version>
        <slf4j.version>1.7.12</slf4j.version>
        <log4j.version>1.2.17</log4j.version>
        <druid.version>1.0.9</druid.version>
    </properties>
    <!-- 用到的jar包 -->
    <dependencies>
        <!-- 單元測試 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <!-- 表示開發的時候引入，發布的時候不會加載此包 -->
            <scope>test</scope>
        </dependency>

        <!-- spring框架包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${srping.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${srping.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-oxm</artifactId>
            <version>${srping.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${srping.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${srping.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${srping.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${srping.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${srping.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>${srping.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${srping.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${srping.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${srping.version}</version>
        </dependency>

        <!-- mybatis框架包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.2.2</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>
        <!--mybatisPlus-->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.1.1</version>
        </dependency>
        <!-- 數據庫驅動包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.35</version>
        </dependency>
        <!-- 導入dbcp的jar包，用來在applicationContext.xml中配置數據庫 -->
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <!-- jstl標簽類 -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- log -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <!--josn全家桶-->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.2</version>
        </dependency>
       <!-- 連接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>
        <!--lombok,配合lombok使用，很好用功能很強大的插件-->
        <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.4</version>
    </dependency>
        <!-- 上傳下載文件-->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-io/commons-io -->
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>
        <!--servlet依賴包-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>

    </dependencies>

    <build>
        <!-- java編譯插件,如果maven的設置里配置好jdk版本就不用 -->
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.2</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <!--mybatis自動逆向生成實體，mapper，xml的插件-->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>
        </plugins>
    </build>

注意：這些依賴對於一個mybatis的基礎項目不一定都需要，只是因為為了開發時方便，我把我認為的幾個重要的也加上了，復制上這段依賴后，可能你代碼會報紅，這是因為你本地的maven倉庫沒有查到這些版本的依賴，它會自動下載，靜靜等候一段時間，等這些依賴包都不報紅時，基本就可以了，怎么確認我們導入這些依賴成功了呢，我們可以在下面這個地方看一下。

 

 

 3.添加配置文件

配置文件都統一放在resources目錄下，關於配置文件的內容解釋請看代碼注釋

配置文件一：jdbc.properties（數據庫連接配置文件）

#數據庫驅動
driver=com.mysql.jdbc.Driver
#數據庫連接地址（product是我的數據庫名，這里換成你自己的）
url=jdbc:mysql://localhost:3306/product?characterEncoding=utf8&useSSL=false
#數據庫的用戶名
username=root
#數據庫的密碼
password=root
#定義初始連接數
initialSize=0
#定義最大連接數
maxActive=20
#定義最大空閑
maxIdle=20    
#定義最小空閑
minIdle=1    
#定義最長等待時間
maxWait=60000　

配置文件二：log4j.properties（日志配置文件，可以不配置）

#日志輸出級別
log4j.rootLogger=debug,stdout,D,E
#設置stdout的日志輸出控制台
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
#輸出日志到控制台的方式，默認為System.out
log4j.appender.stdout.Target = System.out
#設置使用靈活布局
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
#靈活定義輸出格式
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} -[%p]  method:[%c (%rms)] - %m%n

配置文件三：spring-mvc.xml(視圖控制層配置文件)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

    <!-- 掃描注解，這樣com.perfect包下的文件都能被掃描 ,換成你自己的包路徑-->
    <context:component-scan base-package="com.perfect"/>

    <!-- 開啟SpringMVC注解模式 -->
    <mvc:annotation-driven/>

    <!-- 靜態資源默認servlet配置 -->
    <mvc:default-servlet-handler/>

    <!-- 配置返回視圖的路徑，以及識別后綴是jsp文件 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

配置文件四：applicationContext.xml（Spring的全局控制配置文件，最重要）

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
                        http://www.springframework.org/schema/tx
                        http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 加載properties文件 -->
    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:jdbc.properties"/>
<!--
        <property name="locations" value="classpath:log4j.properties"/>
-->
    </bean>

    <!-- 配置數據源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${driver}"/>
        <property name="url" value="${url}"/>
        <property name="username" value="${username}"/>
        <property name="password" value="${password}"/>
    </bean>

    <!-- mybatis和spring完美整合，不需要mybatis的配置映射文件 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- 掃描model包 -->
        <property name="typeAliasesPackage" value="com.perfect"/>
        <!-- 掃描sql配置文件:mapper需要的xml文件-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
    </bean>

    <!-- Mapper動態代理開發，掃描dao接口包-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 給出需要掃描Dao接口包 ，換成你自己的-->
        <property name="basePackage" value="com.perfect.moudle.system.dao"/>
    </bean>

    <!-- 事務管理 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--數據庫連接池-->
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--配置文件上傳-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize">
            <!-- 最大上傳大小：5M -->
            <value>5242880</value>
        </property>
    </bean>
</beans>

配置文件五：generatorConfig.xml（mybatis逆向生成代碼配置文件，需要個人修改最多，按注釋要求進行修改）

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE generatorConfiguration

        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"

        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<!-- 第二種mybatis逆向生成xml配置 -->

<generatorConfiguration>

    <!-- 需要指明數據庫連接器的絕對路徑 -->

    <classPathEntry

            location="F:\learning\jar\mysql-connector-java-5.1.38.jar" />

    <context id="sqlserverTables" targetRuntime="MyBatis3">

        <!-- 生成的pojo，將implements Serializable-->

        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"></plugin>

        <commentGenerator>

            <!-- 是否去除自動生成的注釋 true：是 ： false:否 -->

            <property name="suppressAllComments" value="true" />

        </commentGenerator>



        <!-- 數據庫鏈接URL、用戶名、密碼 -->

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"

                        connectionURL="jdbc:mysql://localhost:3306/product"

                        userId="root"

                        password="root">

        </jdbcConnection>



        <!--

        默認false，把JDBC DECIMAL 和 NUMERIC 類型解析為 Integer

            true，把JDBC DECIMAL 和 NUMERIC 類型解析為java.math.BigDecimal

        -->

        <javaTypeResolver>

            <property name="forceBigDecimals" value="false" />

        </javaTypeResolver>



        <!--

        生成model模型，對應的包路徑，以及文件存放路徑(targetProject)，targetProject可以指定具體的路徑,如./src/main/java，

        也可以使用“MAVEN”來自動生成，這樣生成的代碼會在target/generatord-source目錄下

        -->

        <!--<javaModelGenerator targetPackage="com.joey.mybaties.test.pojo" targetProject="MAVEN">-->

        <javaModelGenerator targetPackage="com.perfect.moudle.system.entity" targetProject="./src/main/java">

            <property name="enableSubPackages" value="true"/>

            <!-- 從數據庫返回的值被清理前后的空格  -->

            <property name="trimStrings" value="true" />

        </javaModelGenerator>



        <!--對應的mapper.xml文件  -->

        <sqlMapGenerator targetPackage="mapper" targetProject="./src/main/resources">

            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>



        <!-- 對應的Mapper接口類文件 -->

        <javaClientGenerator type="XMLMAPPER" targetPackage="com.perfect.moudle.system.dao" targetProject="./src/main/java">
            <property name="enableSubPackages" value="true"/>

        </javaClientGenerator>




        <!-- 列出要生成代碼的所有表，這里配置的是不生成Example文件 -->

        <table tableName="t_scf_risk_warn_detail" domainObjectName="RiskWarnDetail"

               enableCountByExample="true" enableUpdateByExample="true" enableDeleteByExample="true"

               enableSelectByExample="true" selectByExampleQueryId="true" >
            <property name="useActualColumnNames" value="true"/>

        </table>

    </context>

</generatorConfiguration>

注意：有些時候直接將配置文件復制上后，會出現第一行結尾的‘？’有紅色提示的現象，多見於applicationContext.xml和spring_mvc.xml文件，這時候我們只需要把提示紅的部分刪去然后再重新加上，一般就可以解決了。我遇到這個現象時是這樣解決的，如果解決不了那只好百度了，百度滅百分之90以上的bug。

4、調整項目結構

點擊file --> Project Structure -->modules

①  F:\old project\mybatis-no-one\src\main\webapp (注意：scr之前是你的項目路徑，不用變，只需要復制scr以后的內容)

② F:\old project\mybatis-no-one\src\main\webapp\WEB-INF\web.xml（同上，只需要修改src之后的路徑）

現在你的項目結構大體只這樣的：

 

 

 5.配置tomcat，啟動項目

 

 

 

 

 

 點擊Run，選擇彈出列表的第一個或者第二個，啟動一下就好了，此時應該會跳到頁面index.jsp,這是因為在spring_mvc中這樣配置了，如果啟動報錯，可能有以下幾種原因：

1.數據庫配置錯誤，沒有正確添加自己的數據庫以及用戶名和密碼，導致連接失敗。

2.applicationContext.xml配置有問題，掃描包的位置不對，注入失敗錯誤應該此刻不會出現，因為還未寫代碼，還沒喲創建controller，service，dao，bean等，但是后來可能啟動會出現這個問題。

3.包沖突，依賴添加重復，刪去多余依賴包即可（目前我搭建的這個項目沒有存在這個問題）

 

6.添加數據庫備用表，逆向生成實體,example以及mapper，mapper.xml等

在這里我簡單提供幾個數據庫生成的sql，也可以不使用我的而使用你自己的，僅供參考

/*
Navicat MySQL Data Transfer

Source Server         : xcrdb_dev
Source Server Version : 50726
Source Host           : 39.100.124.144:3306
Source Database       : xcrdb_dev

Target Server Type    : MYSQL
Target Server Version : 50726
File Encoding         : 65001

Date: 2020-03-23 15:25:14
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for t_sys_user
-- ----------------------------
DROP TABLE IF EXISTS `t_sys_user`;
CREATE TABLE `t_sys_user` (
  `id` varchar(255) COLLATE utf8_bin NOT NULL COMMENT '用戶id',
  `name` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '姓名',
  `sex` int(11) DEFAULT NULL COMMENT '性別',
  `id_type` int(11) DEFAULT NULL COMMENT '身份證明類型',
  `id_no` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '身份證明id',
  `email` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '郵箱地址',
  `mobile` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '手機號碼',
  `type` int(11) DEFAULT NULL COMMENT '類型',
  `status` int(11) DEFAULT NULL COMMENT '狀態',
  `del_flag` int(11) DEFAULT NULL COMMENT '刪除狀態',
  `avatar` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '頭像地址',
  `create_by` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '創建者ID',
  `create_time` datetime DEFAULT NULL COMMENT '創建時間',
  `update_by` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '更新者ID',
  `update_time` datetime DEFAULT NULL COMMENT '更新時間',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='用戶表';

　　

/*
Navicat MySQL Data Transfer

Source Server         : mysql5.7
Source Server Version : 50717
Source Host           : localhost:3306
Source Database       : product

Target Server Type    : MYSQL
Target Server Version : 50717
File Encoding         : 65001

Date: 2020-03-31 16:01:08
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for t_scf_risk_warn_info
-- ----------------------------
DROP TABLE IF EXISTS `t_scf_risk_warn_info`;
CREATE TABLE `t_scf_risk_warn_info` (
  `id` varchar(36) COLLATE utf8_bin NOT NULL COMMENT 'id',
  `warn_code` varchar(20) COLLATE utf8_bin DEFAULT NULL COMMENT '預警代碼',
  `rule_type` char(1) COLLATE utf8_bin DEFAULT NULL COMMENT '規則分類',
  `rule_name` varchar(20) COLLATE utf8_bin DEFAULT NULL COMMENT '規則名稱',
  `check_type` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '檢驗方式',
  `logical_symbol` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '邏輯符',
  `threshold` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '閾值',
  `warn_result` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '預警結果',
  `rule_condition` text COLLATE utf8_bin COMMENT '規則條件',
  `del_flag` int(11) DEFAULT NULL COMMENT '刪除狀態',
  `create_by` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '創建者ID',
  `create_time` datetime DEFAULT NULL COMMENT '創建時間',
  `update_by` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '更新者ID',
  `update_time` datetime DEFAULT NULL COMMENT '更新時間',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='預警設置';

-- ----------------------------
-- Records of t_scf_risk_warn_info
-- ----------------------------
INSERT INTO `t_scf_risk_warn_info` VALUES ('252887583070097408', '1001', '0', '企業經營狀態異常', '0', '', '', '0', 0x53454C45435420646F6D61696E5F636F646520646F6D61696E436F64652C6E616D652C756E6E6F20636F7270556E6E6F2046524F4D20745F7379735F6F72672057484552452064656C5F666C61673D3020414E44207374617475733D3120414E4420756E6E6F20494E202853454C45435420756E6E6F2046524F4D20745F63725F756E69745F696E666F2057484552452064656C5F666C61673D3020414E4420535542535452494E4728726F6C655F69642C332C32293D2730312720414E442028737461747573204E4F5420494E2028312C3229204F5220737461747573204953204E554C4C2929, '0', 'zcl_pt', '2020-03-19 10:17:19', 'zcl_pt', '2020-03-20 09:22:27');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252889804868423680', '1002', '0', '機構狀態異常', '0', ' ', ' ', '0', 0x53454C4543542069642C6E616D652C6372656469745F636F646520637265646974436F64652C756E6E6F20636F7270556E6E6F2C756E69745F73746174757320756E69745374617475732046524F4D20745F63725F756E69745F696E666F2057484552452064656C5F666C61673D3020414E442028756E69745F737461747573204E4F5420494E2028312C3229204F5220756E69745F737461747573204953204E554C4C29, '1', 'zcl_pt', '2020-03-19 10:26:09', 'zcl_pt', '2020-03-19 16:17:56');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252890358726266880', '1003', '1', '項目授信狀態失效', '0', ' ', ' ', '0', 0x73656C65637420612E636F72705F756E6E6F20636F7270556E6E6F2066726F6D20745F7363665F6974656D5F6C696D69745F6974656D5F696E666F2061206C656674206A6F696E20745F7379735F6F726720620A206F6E20612E636F72705F756E6E6F203D20622E756E6E6F20776865726520612E617574685F737461747573203D203320616E6420622E737461747573203D203120616E6420612E64656C5F666C6167203D3020616E6420622E64656C5F666C6167203D2030, '0', 'zcl_pt', '2020-03-19 10:28:21', 'mpb_pt', '2020-03-19 15:25:29');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252890493082406912', '1004', '2', '項目狀態失效', '0', ' ', ' ', '0', 0x73656C65637420612E636F72655F756E69745F756E6E6F20636F7270556E6E6F2066726F6D20745F7363665F6974656D5F646174612061206C656674206A6F696E20745F7379735F6F726720620A206F6E20612E636F72655F756E69745F756E6E6F203D20622E756E6E6F20776865726520612E737461747573203D203220616E6420622E737461747573203D203120616E6420612E64656C5F666C6167203D3020616E6420622E64656C5F666C6167203D2030, '0', 'zcl_pt', '2020-03-19 10:28:53', 'mpb_pt', '2020-03-19 15:27:21');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252890667049553920', '1005', '2', '上下游企業關聯狀態失效', '0', ' ', ' ', '0', 0x73656C65637420612E636F72705F756E6E6F20636F7270556E6E6F2066726F6D20745F7363665F6974656D5F73636D2061206C656674206A6F696E20745F7379735F6F726720620A206F6E20612E636F72705F756E6E6F203D20622E756E6E6F20776865726520612E617574685F737461747573203D203320616E6420622E737461747573203D203120616E6420612E64656C5F666C6167203D3020616E6420622E64656C5F666C6167203D2030, '0', 'zcl_pt', '2020-03-19 10:29:35', 'mpb_pt', '2020-03-19 15:28:49');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252890897203597312', '1006', '2', '保證金余額小於保證金比例*已用額度', '0', ' ', ' ', '0', 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, '0', 'zcl_pt', '2020-03-19 10:30:29', 'lxf_pt', '2020-03-19 15:33:12');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252891086945521664', '1007', '4', '企業>7天逾期筆數', '1', '大於', '5', '0', 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zcl_pt', '2020-03-19 10:31:15', 'zcl_pt', '2020-03-19 15:38:41');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252891256865165312', '1008', '4', '企業>30天逾期筆數', '1', '大於', '10', '0', 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zcl_pt', '2020-03-19 10:31:55', 'zcl_pt', '2020-03-19 15:35:21');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252891452009353216', '1009', '4', '企業在平台最大逾期天數', '1', '大於', '30', '0', 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, '0', 'zcl_pt', '2020-03-19 10:32:42', 'zcl_pt', '2020-03-19 15:36:14');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252891821187796992', '1010', '4', '企業在平台近一年超7天的逾期次數', '1', '大於', '10', '0', 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, '0', 'zcl_pt', '2020-03-19 10:34:10', 'zcl_pt', '2020-03-19 15:37:25');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252893151579082752', '1011', '5', '其他', '0', ' ', ' ', '0', 0x31, '1', 'zcl_pt', '2020-03-19 10:39:27', 'dew_pt', '2020-03-19 13:41:01');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252981844763480064', '1012', '1', '123123123123123', '0', '', '', '0', 0x3132333132, '1', 'zhaoxulin_pt', '2020-03-19 16:31:53', 'zhaoxulin_pt', '2020-03-19 16:33:11');
INSERT INTO `t_scf_risk_warn_info` VALUES ('252984707636006912', '1013', '1', '0989098', '0', '', '', '1', 0x39373938393830, '1', 'zhaoxulin_pt', '2020-03-19 16:43:16', 'zhaoxulin_pt', '2020-03-19 16:44:09');

/*
Navicat MySQL Data Transfer

Source Server         : mysql5.7
Source Server Version : 50717
Source Host           : localhost:3306
Source Database       : product

Target Server Type    : MYSQL
Target Server Version : 50717
File Encoding         : 65001

Date: 2020-03-31 16:01:24
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for t_scf_risk_flow_info
-- ----------------------------
DROP TABLE IF EXISTS `t_scf_risk_flow_info`;
CREATE TABLE `t_scf_risk_flow_info` (
  `id` varchar(32) COLLATE utf8_bin NOT NULL COMMENT '主鍵',
  `prod_id` varchar(20) COLLATE utf8_bin DEFAULT NULL COMMENT '產品場景代碼',
  `rule_setting` text COLLATE utf8_bin COMMENT '規則配置',
  `status` int(1) DEFAULT NULL COMMENT '狀態',
  `del_flag` int(11) DEFAULT NULL COMMENT '刪除狀態',
  `create_by` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '創建者ID',
  `create_time` datetime DEFAULT NULL COMMENT '創建時間',
  `update_by` varchar(255) COLLATE utf8_bin DEFAULT NULL COMMENT '更新者ID',
  `update_time` datetime DEFAULT NULL COMMENT '更新時間',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='場景風控';

-- ----------------------------
-- Records of t_scf_risk_flow_info
-- ----------------------------
INSERT INTO `t_scf_risk_flow_info` VALUES ('252893256814170112', 'logistics', 0x3235323839303335383732363236363838302C3235323839303439333038323430363931322C3235323839303636373034393535333932302C3235323839303839373230333539373331322C3235323839313038363934353532313636342C3235323839313235363836353136353331322C3235323839313435323030393335333231362C3235323839313832313138373739363939322C323532383837353833303730303937343038, '0', '0', 'zcl_pt', '2020-03-19 10:39:52', 'zcl_pt', '2020-03-20 09:31:36');
INSERT INTO `t_scf_risk_flow_info` VALUES ('252893367371829248', 'receivable', 0x323532383933313531353739303832373532, '1', '1', 'zcl_pt', '2020-03-19 10:40:18', 'dew_pt', '2020-03-19 13:23:40');
INSERT INTO `t_scf_risk_flow_info` VALUES ('252893493666516992', 'prepayments', 0x323532383933313531353739303832373532, '1', '1', 'zcl_pt', '2020-03-19 10:40:48', 'dew_pt', '2020-03-19 13:23:44');
INSERT INTO `t_scf_risk_flow_info` VALUES ('252893632271486976', 'stock', 0x323532383933313531353739303832373532, '1', '1', 'zcl_pt', '2020-03-19 10:41:21', 'dew_pt', '2020-03-19 13:23:47');
INSERT INTO `t_scf_risk_flow_info` VALUES ('252934605668093952', 'liqloan', 0x3235323838373538333037303039373430382C323532383839383034383638343233363830, '1', '1', 'dew_pt', '2020-03-19 13:24:10', 'zcl_pt', '2020-03-19 14:42:39');
INSERT INTO `t_scf_risk_flow_info` VALUES ('252959403739713536', 'liqloan', 0x323532383837353833303730303937343038, '0', '0', 'dew_pt', '2020-03-19 15:02:43', 'zcl_pt', '2020-03-19 16:18:30');　　

　　

修改generatorConfig.xml中的內容，指定數據庫表，生成位置等信息，點擊運行，就能生成對應的代碼文件了。

 

 

這個逆向生成只能一個表一個表的生成，多修改幾次配置文件，最終的項目結構應該是這樣的：

 

 

 

 紅框圈起來的便是逆向生成的代碼了，注意啊，一個表只能逆向生成一次，連續點擊兩次會導致啟動報錯，如果想要重新生成就刪除之前的文件再執行逆向生成操作。

接下來我們就愉快的寫代碼了！！！！

7、編碼與測試

在這里我就打個樣，不把全部的編程來一遍了，關於mybatis的使用，自行可以學習一下。

在實體的同級目錄下，創建service，serviceImpl,controller三個包，然后再每個包下分別創建UserService,UserServiceImpl,UserController三個類，然后具體代碼走起。

 1 package com.perfect.moudle.system.service;
 2 
 3 import com.perfect.moudle.system.entity.User;
 4 
 5 import java.util.List;
 6 
 7 public interface UserService {
 8     /**
 9      * 保存/更新用戶
10      * @param user
11      */
12     void saveUser(User user);
13 
14     /**
15      * 刪除用戶
16      * @param id
17      * @return
18      */
19     boolean deleteUser(String id);
20 
21     /**
22      * 根據id查詢用戶的詳情
23      * @param id
24      * @return
25      */
26     User selectById(String id);
27 
28     /**
29      * 獲取用戶列表
30      * @return
31      */
32     List<User> selectUserList();
33 
34     /**
35      * 根據用戶名模糊查詢
36      * @param name
37      * @return
38      */
39     List<User> selectUserLikeName(String name);
40 }
package com.perfect.moudle.system.serviceimpl;

import com.perfect.common.utils.IdWorker;
import com.perfect.moudle.system.dao.UserMapper;
import com.perfect.moudle.system.entity.User;
import com.perfect.moudle.system.entity.UserExample;
import com.perfect.moudle.system.service.UserService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.UUID;

@Service
@Transactional
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;
    @Override
    public void saveUser(User user) {
        if(user.getId()!=null && !"".equals(user.getId())){//更新
            userMapper.updateByPrimaryKey(user);
        }else{//保存
            User newUser = new User();
            //將對象賦值給新對象
            BeanUtils.copyProperties(user, newUser,"id","create_time"
                    ,"create_by","update_time","update_by","del_flag");
            userMapper.insertSelective(newUser);
        }
    }

    @Override
    public boolean deleteUser(String id) {
        User user = userMapper.selectByPrimaryKey(id);
        user.setDel_flag(1);
        int count = userMapper.updateByPrimaryKey(user);
        if(count!=0){
            return true;
        }else{
            return false;
        }
    }

    @Override
    public User selectById(String id){
        return userMapper.selectByPrimaryKey(id);
    }

    @Override
    public List<User> selectUserList() {
        return userMapper.selectByExample(null);
    }

    @Override
    public List<User> selectUserLikeName(String name) {
        UserExample userExample = new UserExample();
        UserExample.Criteria criteria = userExample.createCriteria();
        criteria.andNameLike(name);
        return userMapper.selectByExample(userExample);
    }
}
package com.perfect.moudle.system.controller;

import com.perfect.common.utils.ResultUtil;
import com.perfect.common.vo.Result;
import com.perfect.moudle.system.entity.User;
import com.perfect.moudle.system.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

@RestController
@RequestMapping(value = "/user")
public class UserController {
    @Autowired
    private UserService userService;

    /**
     * 保存/更新用戶
     * @param user
     * @return
     */
    @RequestMapping(value = "/save",method = RequestMethod.POST)
    public Result saveUser(@RequestBody User user){
        ResultUtil resultUtil = new ResultUtil();
        userService.saveUser(user);
        return resultUtil.setSuccessMsg("保存成功");
    }

    /**
     * 刪除用戶
     * @param id
     * @return
     */
    @RequestMapping(value = "/del",method = RequestMethod.GET)
    public Result delUser(@RequestParam(value = "id") String id){
        boolean isOk = userService.deleteUser(id);
        if (isOk){
            return new ResultUtil<>().setSuccessMsg("刪除成功");
        }else {
            return new ResultUtil<>().setErrorMsg("刪除失敗，請檢查代碼");
        }
    }

    /**
     * 獲取所有的用戶列表
     * @return
     */
    @RequestMapping(value = "/findUserList",method = RequestMethod.GET)
    public Result findUserList(){
        return new ResultUtil<>().setData(userService.selectUserList());
    }

    /**
     * 根據id 獲取用戶信息
     * @param id
     * @return
     */
    @RequestMapping(value = "/findById",method = RequestMethod.GET)
    public Result findById(@RequestParam String id){
        return new ResultUtil<>().setData(userService.selectById(id));
    }
}

接下來啟動，用postman測試一下，一切都ok了。

若看完整代碼，請訪問gitHub：https://github.com/Slience-zae/mybatis-no-one.git

　注：本篇博客皆為本人一字一句的敲打出來的，轉載請備注出處，如有問題，敬請批評。

 


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