ssm框架整合之maven插件mybatis-generator自动生成代码
一.在ssm框架整合时,会遇到很多问题,为了增加整合的速度,减少出错,在整合mybatis时可以适当利用mybatis-generator插件
二.创建Maven工程
项目建好了之后,会出现一些报错的问题,可以设置一下jdk的版本和jre,我这里使用的事JDK1.7;若版本匹配,还有报错,如下图设置一下。具体看problem一栏里的具体报错。(一般index.jsp有错误提示,在pom.xml中修改servlet-api的版本即可)
三.自动生成代码的准备
1.如下是生成好的代码,以及要准备的配置文件的目录结构(其中jdbc.properties和mysql-connector-java-5.1.30.jar可以忽略)
2.下面,首先配置pom.xml文件
2.1在节点<dependencies>中加入如下:
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.2</version>
</dependency>
2.2然后在节点<build> 下的<plugins> 节点中加入如下:
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<!-- mybatis用于生成代码的配置文件 -->
<configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
2.3.一下是我的pom.xml的完整配置(配置的而具体含义,可以自行了解):
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.yingjun.test</groupId>
<artifactId>TradingState</artifactId>
<packaging>war</packaging>
<version>2.0.1</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.build.timestamp.format>yyyyMMddHHmmss</maven.build.timestamp.format>
<spring.version>3.2.9.RELEASE</spring.version>
<mybatis.version>3.1.1</mybatis.version>
<mybatisspring.version>1.1.1</mybatisspring.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatisspring.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.30</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.1</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.9</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.10</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.10</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.41</version>
</dependency>
<dependency>
<groupId>org.codehaus.jackson</groupId>
<artifactId>jackson-mapper-asl</artifactId>
<version>1.9.13</version>
</dependency>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.2</version>
<configuration>
<version>3.0</version>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<!-- mybatis用于生成代码的配置文件 -->
<configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
</plugins>
</build>
</project>
3.然后再配置generatorConfig.xml文件
3.1下面是我的generatorConfig.xml完整配置(配置的而具体含义,可以自行了解)
<?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">
<generatorConfiguration>
<classPathEntry
location="D:/JAVA/MvnRepository/repository/mysql/mysql-connector-java/5.1.30/mysql-connector-java-5.1.30.jar"/>
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressDate" value="false"/>
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- mysql数据库连接 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://127.0.0.1:3306/redisTest" userId="root"
password="1234">
</jdbcConnection>
<!-- 默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer true,把JDBC DECIMAL 和
NUMERIC 类型解析为java.math.BigDecimal -->
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- targetProject:自动生成代码的位置 -->
<javaModelGenerator targetPackage="com.ssmgen.demo.model"
targetProject="E:/myeclipse/Workspaces/MyEclipse/com.mymaven/src/main/java">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!-- 生成mapper.xml配置文件位置 -->
<sqlMapGenerator targetPackage="com.ssmgen.demo.mapper"
targetProject="E:/myeclipse/Workspaces/MyEclipse/com.mymaven/src/main/java">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>
<!-- 生成mapper接口文件位置 -->
<javaClientGenerator targetPackage="com.ssmgen.demo.mapper"
targetProject="E:/myeclipse/Workspaces/MyEclipse/com.mymaven/src/main/java" type="XMLMAPPER">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>
<!-- tableName:用于自动生成代码的数据库表;domainObjectName:对应于数据库表的javaBean类名,当有多个数据摆个要生成时,可以复制下面的代码,同理-->
<table tableName="user_t" domainObjectName="User"
enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="false"
selectByExampleQueryId="false">
</table>
</context>
</generatorConfiguration>
3.2其中,如下,红色标注部分,为jar包在本地的具体物理位置;另外,我现在用的事5.1.30版本,我使用其他版本时,会一直执行失败,供参考
4.建立数据表格(当然,这一步也可以放在前面去做,我这里是写到这一步,发现忘了,捂脸~)
CREATE TABLE user_t (
id int(11) NOT NULL AUTO_INCREMENT,
user_name varchar(40) NOT NULL,
password varchar(255) NOT NULL,
age int(4) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
insert into `user_t`(`user_name`,`password`,`age`) values ('测试','sfasgfaf',24);
5.开始执行
邮件项目,选择Run As>>Configurations,进入如下界面,右键Maven Build,选择New
按照实际情况,如下填写
其中Base directory为项目的实际物理位置,其他项一样的填写,或者是自动生成,不要改动
然后点击Apply之后,点击Run即可生成相关代码,以下是日志。若出现异常或没有成功,可以根据实际错误,进行相应的改正。
以上是个人mybatis-generator代码生成的步骤,仅供参考,欢迎指正~