Spring与Mybatis框架整合——数据分页
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1.创建结构如下图的Maven项目
2.引入所需jar包的依赖坐标
<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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <!-- 工程模型版本 --> <!-- 项目工程的坐标 : 确定不同项目的说明 --> <groupId>com.yc</groupId> <artifactId>spring-02-spring-mybatis</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <!-- 设置项目的编码集 --> <junit.version>4.12</junit.version> <log4j.version>2.5</log4j.version> <spring.version>4.3.2.RELEASE</spring.version> <spring-jdbc.version>4.3.2.RELEASE</spring-jdbc.version> <spring-test.version>4.3.2.RELEASE</spring-test.version> <mybatis.version>3.4.1</mybatis.version> <oracle.version>12.1.0.1</oracle.version> <mybatis-spring.version>1.3.0</mybatis-spring.version> <commons-dbcp2.version>2.1.1</commons-dbcp2.version> </properties> <!--依赖 引入第三方的操作 --> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring-jdbc.version}</version> </dependency> <!-- 第三方的数据库连接池框架 --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-dbcp2</artifactId> <version>${commons-dbcp2.version}</version> </dependency> <!-- mybatis与spring整合包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis-spring.version}</version> <scope>runtime</scope> </dependency> <!-- mybatis框架包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> <scope>runtime</scope> </dependency> <!-- orcal数据库驱动包 --> <dependency> <groupId>com.hynnet</groupId> <artifactId>oracle-driver-ojdbc6</artifactId> <version>${oracle.version}</version> <scope>runtime</scope> <exclusions> <exclusion> <artifactId>slf4j-api</artifactId> <groupId>org.slf4j</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> </dependency> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>${log4j.version}</version> </dependency> <!-- 引入spring 框架 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> </dependencies> <!-- 指定上传的位置 --> <distributionManagement> <repository> <id>nexus-releases</id> <name>Nexus Releases Repositories</name> <url>http://localhost:8081/nexus/content/repositories/releases</url> </repository> <snapshotRepository> <id>nexus-snapshots</id> <name>Nexus Snapshots Repositories</name> <url>http://localhost:8081/nexus/content/repositories/snapshots</url> </snapshotRepository> </distributionManagement></project>3.配置文件如下
数据库连接:db.properties
jdbc.driverClassName=oracle.jdbc.driver.OracleDriverjdbc.url=jdbc:oracle:thin:@localhost:1521:orcljdbc.username=mybatis26(用户名)jdbc.password=a（密码）jdbc.maxActive =5jdbc.initialSize =10jdbc.maxTotal=100jdbc.minIdle=5jdbc.validationQuery =select 1 from dual日志记录:log4j2.xml
<?xml version="1.0" encoding="UTF-8"?><Configuration> <Appenders> <Console name="STDOUT" target="SYSTEM_OUT"> <PatternLayout pattern="%d %-5p %C{1} (%F:%L) - %m%n"/> </Console> </Appenders> <Loggers> <Logger name="com.yc.spring" level="debug"/> <Logger name="org.apache.ibatis.logging.jdbc" level="debug"/> <Root level="error"> <AppenderRef ref="STDOUT"/> </Root> </Loggers></Configuration>spring框架配置文件spring.xml
<?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:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 扫描bean包 --> <!-- bean就由spring容器创建好的对象 --> <!-- 指定可以做为spring容器管理的对象的包 --> <context:component-scan base-package="com.yc.spring" /> <!-- 引入外部属性文件 连接数据库 --> <context:property-placeholder location="classpath:db.properties" /> <!-- 数据源 --> <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"> <property name="driverClassName" value="${jdbc.driverClassName}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="initialSize" value="${jdbc.initialSize}" /> <property name="maxTotal" value="${jdbc.maxTotal}" /> <property name="minIdle" value="${jdbc.minIdle}" /> <property name="validationQuery" value="${jdbc.validationQuery}" /> </bean> <!-- 配制mybatis的会话工厂对象 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /><!-- 注入数据源 对象 --> <property name="typeAliasesPackage" value="com.yc.spring.entity" /><!-- 注入别名定义所在的包 --> <!-- 也能链接mybatis.xml文件,像别名这样的设置可以放在mybatis中 --> <property name="mapperLocations" value="classpath:mapper/*Mapper.xml"></property><!-- 注入注册映射文件 --> </bean> <!-- 配制映射接口的代理实现类的bean,bean的名称为映射接口名首字母小写 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.yc.spring.mapper"></property> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean></beans>4.创建实体类
User.java
package com.yc.spring.entity;import java.io.Serializable;public class User implements Serializable { /** * */ private static final long serialVersionUID = 2561775154643522215L; private Integer id; private String name; private String birthday; private String gender; private String career; private String address; private String mobile; private String picPath; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getBirthday() { return birthday; } public void setBirthday(String birthday) { this.birthday = birthday; } public String getGender() { return gender; } public void setGender(String gender) { this.gender = gender; } public String getCareer() { return career; } public void setCareer(String career) { this.career = career; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } public String getMobile() { return mobile; } public void setMobile(String mobile) { this.mobile = mobile; } public String getPicPath() { return picPath; } public void setPicPath(String picPath) { this.picPath = picPath; } @Override public String toString() { return "User [id=" + id + ", name=" + name + ", birthday=" + birthday + ", gender=" + gender + ", career=" + career + ", address=" + address + ", mobile=" + mobile + ", picPath=" + picPath + "]"; } public User( String name, String birthday, String gender, String career, String address, String mobile, String picPath) { this.name = name; this.birthday = birthday; this.gender = gender; this.career = career; this.address = address; this.mobile = mobile; this.picPath = picPath; } public User() { } }PaginationBean.java
package com.yc.spring.entity;import java.util.List;/** * 通用分页bean * @author 7G-5HI7 * * @param <T> */public class PaginationBean<T> { // 请求参数(有默认值) private Integer currPage =1 ;// 当前页 private Integer pageSize=10;// 每页的数据条数 // 响应数据 private Integer total;// 数据的总条数 private List<T> rows;// 当前分页的数据 /* 以上参数不能变,ui内置参数 */ private Integer totalPage;// 总页数 public Integer getCurrPage() { return currPage; } public void setCurrPage(Integer currPage) { this.currPage = currPage; } public Integer getPageSize() { return pageSize; } public void setPageSize(Integer pageSize) { this.pageSize = pageSize; } public Integer getTotal() { return total; } public void setTotal(Integer total) { this.total = total; } public List<T> getRows() { return rows; } public void setRows(List<T> rows) { this.rows = rows; } public Integer getTotalPage() { return totalPage; } public void setTotalPage(Integer totalPage) { this.totalPage = totalPage; } @Override public String toString() { return "PaginationBean [currPage=" + currPage + ", pageSize=" + pageSize + ", total=" + total + ", \nrows=" + rows + ", totalPage=" + totalPage + "]"; } public PaginationBean(Integer currPage, Integer pageSize, Integer total, List<T> rows, Integer totalPage) { this.currPage = currPage; this.pageSize = pageSize; this.total = total; this.rows = rows; this.totalPage = totalPage; } public PaginationBean() { }}UsersBean.java
package com.yc.spring.entity;import java.io.Serializable;import java.util.List;public class UsersBean implements Serializable{ /** * */ private static final long serialVersionUID = -541475228302438374L; private int currPage ;//当前页面 private int totalPage ;//页面总数 private List<User> rows; private int total;//总记录数 public int getTotal() { return total; } public UsersBean(int currPage, int totalPage, List<User> rows, int total) { this.currPage = currPage; this.totalPage = totalPage; this.rows = rows; this.total = total; } public void setTotal(int total) { this.total = total; } public UsersBean() { super(); } public int getTotalPage() { return totalPage; } public void setTotalPage(int totalPage) { this.totalPage = totalPage; } @Override public String toString() { return "NewsBean [currPage=" + currPage + ", totalPage=" + totalPage + ", news=" + rows + "]"; } public int getCurrPage() { return currPage; } public void setCurrPage(int currPage) { this.currPage = currPage; } public int gettotalPage() { return totalPage; } public void settotalPage(int totalPage) { this.totalPage = totalPage; } public List<User> getRows() { return rows; } public void setRows(List<User> rows) { this.rows = rows; } }5.创建映射接口类
UserMapper.java
package com.yc.spring.mapper;import java.util.List;import org.apache.ibatis.annotations.Param;import com.yc.spring.entity.PaginationBean;import com.yc.spring.entity.User;public interface UserMapper { User findUser(User user); List<User> getAllUser(); /*这是MyBatis提供了一个使用注解来参入多个参数的方式。这种方式需要在接口的参数上添加@Param注解*/ List<User> getPartNews(@Param("pageSize") int pageSize,@Param("currPage") int currPage); int getTotalPage(int pageSize); PaginationBean<User> getUsersByPagination(PaginationBean<User> userBean); int updateUser(User user); User getUserById(int id);}6.创建xml映射文件
UserMapper.xml
<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><!-- 命名空间与对应映射接口的全类名一致 --><mapper namespace="com.yc.spring.mapper.UserMapper"> <!-- 定义sql语句 变量 --> <sql id="selectProfile"> select * from profile </sql> <select id="findUser" parameterType="User" resultType="User"> <include refid="selectProfile"/> where id=#{id} and name=#{name} </select> <select id="getUserById" parameterType="int" resultType="User" useCache="false"> <include refid="selectProfile"/> where id=#{id} </select> <select id="getAllUser" resultType="User"> <include refid="selectProfile"/> </select> <select id="getTotalPage" resultType="int" parameterType="int"> select ceil(count(1)/#{pageSize}) from profile </select> <select id="getPartNews" resultType="User" parameterType="int"> select * from (select rownum rn,n.* from (<include refid="selectProfile"/> order by 1 )n where ${pageSize}*${currPage} >= rownum) where rn>(${currPage}-1)*${pageSize} </select> <!-- 嵌套查询 --> <resultMap type="PaginationBean" id="PaginationBeanMap"> <collection property="rows" column="{pageSize=pageSize,currPage=currPage}" select="getUsers"></collection> </resultMap> <!-- #是占位符(就是?) $是直接取到值 --> <select id="getUsersByPagination" parameterType="PaginationBean" resultMap="PaginationBeanMap"> select count(1) total, ceil(count(1)/#{pageSize}) totalPage , ${pageSize} pageSize,${currPage} currPage from profile </select> <select id="getUsers" resultType="User"> select * from (select rownum rn,n.* from (<include refid="selectProfile"/> order by 1 desc )n where ${pageSize}*${currPage} >= rownum) where rn>(${currPage}-1)*${pageSize} </select> <!-- 只能有传入参数,不能写传出参数 --> <update id="updateUser" parameterType="User" flushCache="false"><!-- 不清除缓存 --> update profile set name=#{name} ,birthday=#{birthday},career=#{career},address=#{address} ,mobile=#{mobile} <if test="picPath != null">,picPath=#{picPath}</if> where id=#{id} </update></mapper>阅读全文
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