springboot-mybatis-pagehelper(分页插件)

依赖

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

	<groupId>com.example</groupId>
	<artifactId>demo1</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>demo1</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.2.RELEASE</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<!--启动时启动内置tomcat -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-tomcat</artifactId>
			<scope>provided</scope>
		</dependency>

		<!--对Jsp支持 -->
		<dependency>
			<groupId>org.apache.tomcat.embed</groupId>
			<artifactId>tomcat-embed-jasper</artifactId>
		</dependency>

		<!-- 支持jstl -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
		</dependency>

		<!-- fastjson -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.46</version>
		</dependency>

		<!-- MyBatis -->
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.3.1</version>
		</dependency>

		<!--mybatis分页插件 -->
		<dependency>
			<groupId>com.github.pagehelper</groupId>
			<artifactId>pagehelper-spring-boot-starter</artifactId>
			<version>1.2.3</version>
		</dependency>

		<!-- MySql驱动 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>

		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<version>1.16.22</version>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

domain

package pom.domain;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * @Title: User.java
 * @Package pom.domain
 * @Description: TODO(用一句话描述该文件做什么)
 * @author licy
 * @date 2018年10月9日
 * @version V1.0
 */

@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
	private String id;
	private String name;
}

　　

controller

package pom.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import com.github.pagehelper.PageInfo;

import pom.domain.User;
import pom.service.UserService;

@RestController
// 表示该controller类下所有的方法都公用的一级上下文根
@RequestMapping(value = "/springboot")
public class UserController {

	@Autowired
	private UserService userService;

	// 这里使用@RequestMapping注解表示该方法对应的二级上下文路径
	@RequestMapping(value = "/getUserByGet", method = RequestMethod.GET)
	String getUserByGet(@RequestParam(value = "id") String id) {
		User user = new User();
//		user.setId(id);
//		User u = userService.getUserById(user);
		PageInfo pageInfo = userService.getUserList(user);
		System.out.println(pageInfo.getList().size());
		return "Hello " + id;
	}
}

service

package pom.service;

import com.github.pagehelper.PageInfo;

import pom.domain.User;

/**
  * @Title: UserService.java
  * @Package pom.service
  * @Description: TODO(用一句话描述该文件做什么)
  * @author licy
  * @date 2018年10月9日
  * @version V1.0
  */

public interface UserService {
	User getUserById(User user);

	PageInfo getUserList(User user);
}

serviceImpl

package pom.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;

import pom.dao.UserDao;
import pom.domain.User;

/**
 * @Title: UserServiceImpl.java
 * @Package pom.service
 * @Description: TODO(用一句话描述该文件做什么)
 * @author licy
 * @date 2018年10月9日
 * @version V1.0
 */

@Service
public class UserServiceImpl implements UserService {

	@Autowired
	private UserDao userDao;

	@Override
	public User getUserById(User user) {
		return userDao.getUserById(user);
	}

	@Override
	public PageInfo getUserList(User user) {
		PageHelper.startPage(10, 10);
		List<User> result = userDao.getUserList(user);
		PageInfo<User> pageInfo = new PageInfo<User>(result);
		return pageInfo;
	}

}

　　

　　

dao

package pom.dao;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;

import pom.domain.User;

/**
  * @Title: UserDao.java
  * @Package pom.dao
  * @Description: TODO(用一句话描述该文件做什么)
  * @author licy
  * @date 2018年10月9日
  * @version V1.0
  */

@Mapper
public interface UserDao {
	User getUserById(User user);

	List<User> getUserList(User user);
}

UserMapper.xml:mapper目录下

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN" "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">
<mapper namespace="pom.dao.UserDao">
	<select id="getUserById" parameterType="pom.domain.User"
		resultType="pom.domain.User"> SELECT * FROM user WHERE ID = #{id}
	</select>

	<select id="getUserList" parameterType="pom.domain.User"
		resultType="pom.domain.User"> SELECT * FROM user
	</select>
</mapper>

application.properties

#\u8BBE\u7F6ETomcat\u7AEF\u53E3\uFF0C\u9ED8\u8BA48080
server.port=8080
#\u8BBE\u7F6ETomcat\u7F16\u7801
server.tomcat.uri-encoding=UTF-8

#--------------------------------spring---------------------------
#\u8BBE\u7F6E\u89C6\u56FE\u89E3\u6790\u5668\u8DEF\u5F84
spring.mvc.view.prefix=/WEB-INF/views/
#\u8BBE\u7F6E\u89C6\u56FE\u89E3\u6790\u5668\u540E\u7F00
spring.mvc.view.suffix=.jsp
#\u6570\u636E\u5E93\u914D\u7F6E
spring.datasource.url=jdbc:mysql://localhost:3306/licy?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver 

#-----------------------------mybatis-------------------------------
#\u914D\u7F6E.xml\u6587\u4EF6\u8DEF\u5F84
mybatis.mapper-locations=classpath:mapper/*.xml
#\u914D\u7F6E\u6A21\u578B\u8DEF\u5F84
mybatis.type-aliases-package=pom.domain

#-----------------------------pagehelper---------------------------
pagehelper.helperDialect=mysql
pagehelper.reasonable=true
pagehelper.support-methods-arguments=true
pagehelper.params=count=countSql

　

访问地址：http://localhost:8080/springboot/getUserByGet?id=a