原生的mybatis需要手寫sql語句，項目數據庫表多了之後，可以讓你寫sql語句寫到手軟，於是mybatis官方提供了mybatis-generator：mybatis逆向工程代碼生成工具，用於簡化mybatis單表操作。
在PageHelper3.幾的版本的時候，使用它對逆向工程生成的查詢方法進行分頁時出現失效的情況，而PageHelper4開始，親測能夠與mybatis逆向工程生成的方法完美兼容，今天就和大家分享spring+mybatis+PageHelper的一個整合小案例
第一步：創建maven工程，編寫pom.xml
<!-- 集中定義依賴版本號 -->
<!-- 已經依據maven倉庫給出的版本兼容信息，調節好合適的spring、mybatis-spring、mybatis、pagehelper版本號 -->
<properties>
<junit.version>4.12</junit.version>
<spring.version>4.3.10.RELEASE</spring.version>
<mybatis.version>3.4.1</mybatis.version>
<mybatis.spring.version>1.3.0</mybatis.spring.version>
<mysql.version>5.1.32</mysql.version>
<slf4j.version>1.6.4</slf4j.version>
<jackson.version>2.8.8</jackson.version>
<druid.version>1.0.9</druid.version>
<httpclient.version>4.3.5</httpclient.version>
<jstl.version>1.2</jstl.version>
<servlet-api.version>2.5</servlet-api.version>
<jsp-api.version>2.0</jsp-api.version>
<joda-time.version>2.5</joda-time.version>
<commons-lang3.version>3.3.2</commons-lang3.version>
<commons-io.version>1.3.2</commons-io.version>
<commons-net.version>3.3</commons-net.version>
<!-- 4.1.6 -->
<pagehelper.version>4.1.0</pagehelper.version>
<jsqlparser.version>0.9.1</jsqlparser.version>
<commons-fileupload.version>1.3.1</commons-fileupload.version>
<jedis.version>2.7.2</jedis.version>
<solrj.version>4.10.3</solrj.version>
<dubbo.version>2.5.3</dubbo.version>
<zookeeper.version>3.4.7</zookeeper.version>
<zkclient.version>0.1</zkclient.version>
<activemq.version>5.11.2</activemq.version>
<freemarker.version>2.3.23</freemarker.version>
<quartz.version>2.2.2</quartz.version>
</properties>
<dependencies>
<!-- 時間操作組件 -->
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
<version>${joda-time.version}</version>
</dependency>
<!-- Apache工具組件 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-io</artifactId>
<version>${commons-io.version}</version>
</dependency>
<dependency>
<groupId>commons-net</groupId>
<artifactId>commons-net</artifactId>
<version>${commons-net.version}</version>
</dependency>
<!-- Jackson Json處理工具包 -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- httpclient -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>${httpclient.version}</version>
</dependency>
<!-- quartz任務調度框架 -->
<dependency>
<groupId>org.quartz-scheduler</groupId>
<artifactId>quartz</artifactId>
<version>${quartz.version}</version>
</dependency>
<!-- 單元測試 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<!-- Mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>${pagehelper.version}</version>
</dependency>
<!-- MySql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- 連接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</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-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jms</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 整合測試包 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>provided</scope>
</dependency>
<!-- log4j2 -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.7</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.7</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>2.7</version>
</dependency>
<!-- JSP相關 -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${servlet-api.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>${jsp-api.version}</version>
<scope>provided</scope>
</dependency>
<!-- 文件上傳組件 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>${commons-fileupload.version}</version>
</dependency>
<!-- Redis客戶端 -->
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>${jedis.version}</version>
</dependency>
<!-- solr客戶端 -->
<dependency>
<groupId>org.apache.solr</groupId>
<artifactId>solr-solrj</artifactId>
<version>${solrj.version}</version>
</dependency>
<!-- dubbo相關 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>${dubbo.version}</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>${zookeeper.version}</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>${zkclient.version}</version>
</dependency>
<dependency>
<groupId>org.apache.activemq</groupId>
<artifactId>activemq-all</artifactId>
<version>${activemq.version}</version>
</dependency>
<dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>${freemarker.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<!-- 資源文件拷貝插件 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.7</version>
<configuration>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<!-- java編譯插件 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<!-- 配置Tomcat插件 -->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<configuration>
<port>8080</port>
<path>/</path>
</configuration>
</plugin>
</plugins>
</build>第二步：使用mybatis逆向工程工具生成代碼:
mybatis-generator 下載地址：逆向工程工具
該工具並不是我分享的，我也沒用過，如果是不能用的，希望能夠在評論區告訴我
第三步：將mybatis逆向工程生成的代碼複製到我們的項目下
第四步：配置文件相關：
4.1 配置log4j2.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="OFF" monitorInterval="1800">
<properties>
<property name="LOG_HOME">D:/log4j2/mybatis/genertor/logs/</property>
<property name="ERROR_LOG_FILE_NAME">error</property>
</properties>
<Appenders>
<!-- 控制檯打印日誌 -->
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d %-5p (%F:%L) - %m%n" />
</Console>
<!-- 日誌信息輸出到文件配置 -->
<RollingRandomAccessFile name="ErrorLog"
fileName="${LOG_HOME}/${ERROR_LOG_FILE_NAME}.log"
filePattern="${LOG_HOME}/${ERROR_LOG_FILE_NAME}.log.%d{yyyy-MM-dd}.gz">
<PatternLayout
pattern="%d %-5p (%F:%L) - %m%n"/>
<Policies>
<!-- TimeBasedTriggeringPolicy指定的size是1，結合起來就是1天生成一個新文件。如果filePattern改成%d{yyyy-MM-dd HH}.gz,此時最小粒度爲小時，則每一個小時生成一個文件。 -->
<TimeBasedTriggeringPolicy/>
<!-- 指定當文件體積大於size指定的值時，觸發Rolling -->
<SizeBasedTriggeringPolicy size="100 MB"/>
</Policies>
<!-- 指定最多保存的文件個數 -->
<DefaultRolloverStrategy max="20"/>
</RollingRandomAccessFile>
<param name="Encoding" value="UTF-8" />
</Appenders>
<Loggers>
<!-- 3rdparty Loggers -->
<logger name="org.springframework.core" level="info">
</logger>
<logger name="org.springframework.beans" level="info">
</logger>
<logger name="org.springframework.context" level="info">
</logger>
<logger name="org.springframework.web" level="info">
</logger>
<logger name="org.springframework.test.context.junit4.SpringJUnit4ClassRunner" level="info">
</logger>
<logger name="com.lmsq.shaxuntech" level="debug" includeLocation="true" additivity="false">
<appender-ref ref="ErrorLog"/>
<appender-ref ref="Console"/>
</logger>
<root level="info" includeLocation="true">
<appender-ref ref="ErrorLog"/>
<appender-ref ref="Console"/>
</root>
</Loggers>
<!--然後定義logger，只有定義了logger並引入的appender，appender纔會生效-->
</Configuration> 4.2配置spring相關配置文件
applicationContext-dao.xml
<!-- 加載配置文件 -->
<context:property-placeholder location="classpath:conf/db.properties" file-encoding="utf-8" />
<!-- 數據庫連接池 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close">
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="driverClassName" value="${jdbc.driver}" />
<property name="maxActive" value="10" />
<property name="minIdle" value="5" />
</bean>
<!-- 讓spring管理sqlsessionfactory 使用mybatis和spring整合包中的 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 數據庫連接池 -->
<property name="dataSource" ref="dataSource" />
<!-- 加載mybatis的全局配置文件 -->
<property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" />
<!-- 配置Mapper配置文件所在路徑 -->
<property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"/>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.stu.dao" />
</bean>application-service.xml
<!-- 配置包掃描器 -->
<context:component-scan base-package="com.stu.service"/>springmvc.xml
<!-- 加載配置文件 -->
<context:property-placeholder location="classpath:conf/*.properties" file-encoding="utf-8" />
<context:component-scan base-package="com.stu.api.controller" />
<mvc:annotation-driven />
<!-- 配置資源映射 -->
<mvc:resources location="/css/" mapping="/css/**"/>
<mvc:resources location="/js/" mapping="/js/**"/>
<!-- 配置多媒體解析器 -->
<!-- 定義文件上傳解析器 -->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 設定默認編碼 -->
<property name="defaultEncoding" value="UTF-8"></property>
<!-- 設定文件上傳的最大值5MB，5*1024*1024 -->
<property name="maxUploadSize" value="5242880"></property>
</bean>
<!-- 添加跨域請求支持 -->
<!--
<mvc:cors>
<mvc:mapping path="/**" allowed-origins="*" allow-credentials="true" max-age="1800" allowed-methods="GET,POST,PUT,DELETE,PATCH,OPTIONS"/>
</mvc:cors>
-->4.3mybatis相關配置
SqlMapConfig.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<typeAliases>
<package name="com.stu.pojo" />
</typeAliases>
<plugins>
<plugin interceptor="com.github.pagehelper.PageHelper">
<!-- 設置數據庫類型 Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六種數據庫-->
<property name="dialect" value="mysql"/>
</plugin>
</plugins>
</configuration>4.4 數據庫鏈接的properties文件
db.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/stu?characterEncoding=utf-8
jdbc.username=root
jdbc.password=root4.5web.xml的配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
<display-name>Mybatis-generator</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<!-- 解決post亂碼 -->
<filter>
<filter-name>characterEncoding</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- log4j2-begin -->
<listener>
<listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>
</listener>
<filter>
<filter-name>log4jServletFilter</filter-name>
<filter-class>org.apache.logging.log4j.web.Log4jServletFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>log4jServletFilter</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
<dispatcher>INCLUDE</dispatcher>
<dispatcher>ERROR</dispatcher>
</filter-mapping>
<!-- log4j2-end -->
<!-- 支持GET、POST、PATCH、PUT與DELETE請求 -->
<filter>
<filter-name>httpPutFormFilter</filter-name>
<filter-class>org.springframework.web.filter.HttpPutFormContentFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>httpPutFormFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!--
<filter>
<filter-name>hiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>hiddenHttpMethodFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
-->
<!-- 加載spring配置文件 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/applicationContext*.xml</param-value>
</context-param>
<!-- 加載springmvc配置文件 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<!-- 指定攔截路徑 -->
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>第五步：創建service層引用Mapper接口
接口：
package com.stu.service;
import java.util.List;
import com.stu.pojo.TUser;
public interface UserService {
public List<TUser> getUserInfo( String keywords, Integer page, Integer size);
}實現類：
package com.stu.service.impl;
import java.util.List;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.stu.dao.TUserMapper;
import com.stu.pojo.TUser;
import com.stu.pojo.TUserExample;
import com.stu.service.UserService;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private TUserMapper userMapper;
@Override
public List<TUser> getUserInfo(String keywords, Integer page, Integer size) {
PageHelper.startPage(page, size);
TUserExample example = new TUserExample();
if (!StringUtils.isBlank(keywords)) {
example.createCriteria().andUsernameLike(keywords + "%");
}
List<TUser> list = userMapper.selectByExample(example);
PageInfo<TUser> info = new PageInfo<TUser>(list);
System.out.println("頁碼: " + info.getPageNum());
System.out.println("每頁大小: " + info.getSize());
System.out.println("總頁數: " + info.getPages());
System.out.println("總記錄數: " + info.getTotal());
return list;
}
}第六步：創建Controller
package com.stu.api.controller;
import java.io.UnsupportedEncodingException;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.stu.pojo.TUser;
import com.stu.service.UserService;
@RestController
@RequestMapping("/api/v2/users")
public class UserController {
@Resource
private UserService userService;
@GetMapping("/")
public List<TUser> getUserInfo( String keywords ,Integer page, Integer size){
System.out.println("page : " + page);
System.out.println("size : " + size);
if(keywords != null){
try {
keywords=new String(keywords.getBytes("ISO-8859-1"),"UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
List<TUser> user = userService.getUserInfo(keywords , page, size);
return user;
}
}第七步：運行項目 ，測試
1、使用tomcat7:run運行項目
2、在瀏覽器中輸入:http://localhost:8080/api/v2/users/?keyword=張三&page=1&size=2
數據返回成功:
{"data":[{"id":1,"username":"王五","password":null,"state":0,"isdel":false,"addTime":1487644664000,"money":null,"leftMoney":22.1,"remark":null},{"id":2,"username":"張三","password":null,"state":0,"isdel":false,"addTime":1487644811000,"money":null,"leftMoney":22.1,"remark":null}],"meta":{"respCode":0,"respMsg":null,"detail":"OK","url":null},"pagination":{"page":1,"size":2,"totalPage":58,"totalCode":116}}