标签:实体类 comment 代码生成 创建 student color 地址 sys override
本人使用的是idea的maven工程Mybatis框架演示
1.请看下xml树的结构
2.首先导入相关jar包并且解决根目录xml文件不加入项目编译问题
<dependencies> <dependency> <groupId>dom4j</groupId> <artifactId>dom4j</artifactId> <version>1.6.1</version> </dependency> <dependency> <groupId>jaxen</groupId> <artifactId>jaxen</artifactId> <version>1.1.6</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.5</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.41</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.3</version> </dependency> </dependencies> <build> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> </resource> <resource> <directory>src/main/resources</directory> </resource> </resources> </build>
3.使用mybatis中的逆向工程帮我们做好实体与dao层的操作
3.1创建mbg.xml文件并放在项目根目录
<?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> <!--配置jdbc配置源--> <context id="DB2Tables" targetRuntime="MyBatis3"> <commentGenerator> <!--把他设置为true 是让它不再自动生成注释--> <property name="suppressAllComments" value="true" /> </commentGenerator> <!--连接数据库--> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/address" userId="root" password="admin"> </jdbcConnection> <!--Java解析类型,我们不用管--> <javaTypeResolver > <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!--javaBean模型生成--> <!-- 你要把Bean生成在哪个包下--> <!-- 你要在哪个工程下生成.\src代表生成在本工程下--> <javaModelGenerator targetPackage="自己所需路径" targetProject=".\src\main\java"> <property name="enableSubPackages" value="true" /> <property name="trimStrings" value="true" /> </javaModelGenerator> <!--指定sqlXML生成映射文件的位置--> <sqlMapGenerator targetPackage="自己所需路径" targetProject=".\src\main\resources"> <property name="enableSubPackages" value="true" /> </sqlMapGenerator> <!--指定Dao接口生成位置,Mapper接口--> <javaClientGenerator type="XMLMAPPER" targetPackage="自己所需路径" targetProject=".\src\main\java"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <!--table元素表示每个表的生成策略--> <!--生成表的名称 Bean名称一定要大写 对应的JavaBean的名称--> <!--<table tableName="tbuser" domainObjectName="Tbuser"></table>--> <table tableName="city" domainObjectName="City"></table> <table tableName="community" domainObjectName="Community"></table> <table tableName="district" domainObjectName="District"></table> <table tableName="province" domainObjectName="Province"></table> <table tableName="street" domainObjectName="Street"></table> <!--<table tableName="student" domainObjectName="Student"></table>--> <!--<table tableName="grade" domainObjectName="Grade"></table>--> <!--<table schema="DB2ADMIN" tableName="ALLTYPES" domainObjectName="Customer" >--> <!--<property name="useActualColumnNames" value="true"/>--> <!--<generatedKey column="ID" sqlStatement="DB2" identity="true" />--> <!--<columnOverride column="DATE_FIELD" property="startDate" />--> <!--<ignoreColumn column="FRED" />--> <!--<columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" />--> <!--</table>--> </context> </generatorConfiguration>
3.2接着执行代码生成实体
public class TestMBG { public static void main(String args[]) throws Exception { List<String> warnings = new ArrayList<String>(); boolean overwrite = true; File configFile = new File("mbg.xml"); ConfigurationParser cp = new ConfigurationParser(warnings); Configuration config = null; config = cp.parseConfiguration(configFile); DefaultShellCallback callback = new DefaultShellCallback(overwrite); MyBatisGenerator myBatisGenerator = null; myBatisGenerator = new MyBatisGenerator(config, callback, warnings); myBatisGenerator.generate(null); } }
4.当执行完成后会看到我们指定路径下已经生成相应的文件 在这里就不在展示,只要自己设置的路径没错那么在项目中查看即可
5.我们需要在逆向工程中生成的文件做下更改.让我们能够在增加进数据库时能获取当时增加数据的自增ID主键,只示例3个,属性:
useGeneratedKeys="true" keyProperty="cityid"
<!--我们调用的是每个实体类DAO的insertSelective方法进行添加,所以打开每个实体类的mapper.xml文件找到方法增加获取增加数据的ID--> <insert id="insertSelective" parameterType="entity.Community" useGeneratedKeys="true" keyProperty="communityid">
<insert id="insertSelective" parameterType="entity.City" useGeneratedKeys="true" keyProperty="cityid">
<insert id="insertSelective" parameterType="entity.District" useGeneratedKeys="true" keyProperty="districtid">
6.准备工作已完毕,下面开始编写解析方法
public class TestDom4j { private SqlSessionFactory sqlSessionFactory; private SqlSession sqlSession; private ProvinceMapper provinceMapper; private DistrictMapper districtMapper; private StreetMapper streetMapper; private CityMapper cityMapper; private CommunityMapper communityMapper; @Before public void init(){ try { this.sqlSessionFactory = new SqlSessionFactoryBuilder().build(Resources.getResourceAsStream("mybatis-config.xml")); this.sqlSession = this.sqlSessionFactory.openSession(); this.provinceMapper = this.sqlSession.getMapper(ProvinceMapper.class); this.cityMapper = this.sqlSession.getMapper(CityMapper.class); this.districtMapper = this.sqlSession.getMapper(DistrictMapper.class); this.streetMapper = this.sqlSession.getMapper(StreetMapper.class); this.communityMapper = this.sqlSession.getMapper(CommunityMapper.class); } catch (IOException e) { e.printStackTrace(); } } @After public void destroy() { this.sqlSession.commit(); this.sqlSession.close(); } @Test public void test() { SAXReader reader=new SAXReader(); try { // 解析文件所在路径 File file = new File("D:\\dom4jtest1\\src\\test\\All.xml"); Document document=reader.read(file); List<Element> elist = new ArrayList<>(); // 这里是根节点 Element element=document.getRootElement(); //获取根节点下一层所有的节点 elist = element.elements(); //循环area节点 for (Element e : elist) { //获取area下的所有节点 List<Element> elist1 = e.elements(); //new 出省份实例,并且赋值 Province p = new Province(); //根据area节点的名称取Text值 p.setProvincename(e.elementText("name")); p.setCode(e.elementText("code")); p.setLevel(e.elementText("level")); //调用省的增加方法增加完成直接会返回刚才插入数据的对象 provinceMapper.insertSelective(p); //输出刚才插入的数据 System.out.println("这是省"+p); //循环从area下的所有节点 for (Element e1:elist1){ //省份 如:河北省 //在这里能够获取area下的所有节点值 // System.out.println(e.elementText("name")); // System.out.println("省\t"+e1.getText()); // System.out.println("省\t"+e1.getName()); //如果在area节点下的子节点有areas节点那么获取子节点下的所有节点 if (e1.getName().equals("areas")){ //获取areas节点下的所有子节点 List<Element> elist2 = e1.elements(); //循坏子节点 for (Element e2 : elist2) { //在xml中可以看到下一层节点元素内容是城市 City city = new City(); //对城市属性进行赋值 city.setCode(e2.elementText("code")); city.setLevel(e2.elementText("level")); city.setCityname(e2.elementText("name")); city.setProvinceid(p.getProvinceid()); cityMapper.insertSelective(city); System.out.println("这是城市"+city); //获取城市以下所有节点 List<Element> elist3 = e2.elements(); //循坏城市以下节点 for (Element e3:elist3){ //市辖区 如 北京市 //可以在这里不用elementText方法用getText可以获得城市元素的文本 // System.out.println("市\t"+e3.getText()); // System.out.println("市\t"+e3.getName()); /** * 剩下都一样的思路,请仔细阅读代码方便理解 */ if (e3.getName().equals("areas")) { List<Element> list4 = e3.elements(); for (Element e4 : list4) { District district = new District(); district.setDistrictname(e4.elementText("name")); district.setCode(e4.elementText("code")); district.setLevel(e4.elementText("level")); district.setCityid(city.getCityid()); int did = districtMapper.insertSelective(district); System.out.println("这是地区"+district); List<Element> elist5 = e4.elements(); // System.out.println(elist5.size()); for (Element e5:elist5){ //这里是城区 如:东城区 // System.out.println("地区名称\t"+e5.getName()); // System.out.println("地区名称\t"+e5.getText()); if (e5.getName().equals("areas")) { //提取所有街道 List<Element> elist6 = e5.elements(); for (Element e6 : elist6) { Street street = new Street(); street.setCode(e6.elementText("code")); street.setLevel(e6.elementText("level")); street.setStreetname(e6.elementText("name")); street.setDistrictid(district.getDistrictid()); int sid = streetMapper.insertSelective(street); System.out.println("这是街道"+street); //提取街道下的所有街道名称 List<Element> elist7 = e6.elements(); for (Element e7 : elist7) { //所有的街道名称 // System.out.println(e7.getText()); //是否有下一层居委会 if (e7.getName().equals("areas")){ //从街道下提取所有的居委会 List<Element> elist8 = e7.elements(); for (Element e8 : elist8) { Community comm = new Community(); comm.setCode(e8.elementText("code")); comm.setLevel(e8.elementText("level")); comm.setCommunityname(e8.elementText("name")); comm.setStreetid(street.getStreetid()); communityMapper.insertSelective(comm); System.out.println("这是居委会"+comm); List<Element> elist9 = e8.elements(); for (Element e9 : elist9) { //输出居委会节点名 // System.out.println(e9.getName()); //输出居委会名称 // System.out.println(e9.getText()); } } } } } } } } } } } } } } } catch (DocumentException e) { e.printStackTrace(); } }
7.执行成功,然后查看数据库.
标签:实体类 comment 代码生成 创建 student color 地址 sys override
原文地址:http://www.cnblogs.com/asxf/p/7082756.html