SpringBoot + MyBatis-plus + Druid 实现简单增删查改、动态条件查询和分页功能
虾米哥
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2021-03-31 12:54:28
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本文主要讲解：SpringBoot集成Mybatis-plus，数据库连接池使用alibaba的druid,实现简单增删查改、动态条件查询和分页功能。
项目整体结构
项目添加相关框架依赖（pom.xml）
<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.zzg</groupId>
<artifactId>crm_sys</artifactId>
<version>0.0.1-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.2.RELEASE</version>
</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>
<!--starter -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<!-- test -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!--web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--validation -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-validation</artifactId>
</dependency>
<!--lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<!-- mybatis-plus 集成 -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.4.1</version>
</dependency>
<!-- 数据库连接池druid -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
<!--mysql 驱动程序 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
<!--集成mybatis-generator 自动生成组件 -->
<build>
<plugins>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.7</version>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.12</version>
</dependency>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.7</version>
</dependency>
</dependencies>
<executions>
<execution>
<id>Generate MyBatis Artifacts</id>
<phase>package</phase>
<goals>
<goal>generate</goal>
</goals>
</execution>
</executions>
<configuration>
<!--允许移动生成的文件 -->
<verbose>true</verbose>
<!-- 是否覆盖 -->
<overwrite>true</overwrite>
<!-- 自动生成的配置 -->
<configurationFile>src/main/resources/generatorConfig.xml</configurationFile>
</configuration>
</plugin>
</plugins>
</build>
</project>项目资源文件配置（application.yml）
server:
port: 8098
mybatis-plus:
mapper-locations:classpath:/mapper/*Mapper.xml
typeAliasesPackage:com.zzg.entity
spring:
##数据库连接信息
datasource:
url: jdbc:mysql://192.168.1.73:3306/boot-table?serverTimezone=Asia/Shanghai&useSSL=false&allowPublicKeyRetrieval=true&allowMultiQueries=true
username: root
password: digipower
driver-class-name: com.mysql.cj.jdbc.Driver
###################以下为druid增加的配置###########################
type: com.alibaba.druid.pool.DruidDataSource
# 下面为连接池的补充设置，应用到上面所有数据源中
# 初始化大小，最小，最大
initialSize: 5
minIdle: 5
maxActive: 20
# 配置获取连接等待超时的时间
maxWait: 60000
# 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
timeBetweenEvictionRunsMillis: 60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
# 打开PSCache，并且指定每个连接上PSCache的大小
poolPreparedStatements: true
maxPoolPreparedStatementPerConnectionSize: 20
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
filters: stat,wall,log4j
# 通过connectProperties属性来打开mergeSql功能；慢SQL记录
connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
# 合并多个DruidDataSource的监控数据
useGlobalDataSourceStat: true
###############以上为配置druid添加的配置########################################
项目涉及（entity、mapper、service、serviceImpl 和Controller）
Controller 层定义
package com.zzg.controller;
import java.util.Map;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
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.ResponseBody;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.zzg.common.controller.AbstractController;
import com.zzg.entity.User;
import com.zzg.service.UserService;
@Controller
@RequestMapping("/api/user")
public class UserController extends AbstractController<User> {
@Autowired
private UserService userService;
// 增
@RequestMapping(value = "/insert", method = { RequestMethod.POST }, produces = "application/json;charset=UTF-8")
@ResponseBody
public Object insert(@RequestBody User user) {
return userService.save(user);
}
// 改
@RequestMapping(value = "/update", method = { RequestMethod.POST }, produces = "application/json;charset=UTF-8")
@ResponseBody
public Object update(@RequestBody User user) {
return userService.updateById(user);
}
// 删
@RequestMapping(value = "/delete/{id}", method = { RequestMethod.DELETE })
@ResponseBody
public Object delete(@PathVariable("id") Integer id) {
return userService.removeById(id);
}
// 查
@RequestMapping(value = "/getUserByName", method = { RequestMethod.GET })
@ResponseBody
public Object getUserByName(@RequestParam String userName) {
QueryWrapper<User> query = new QueryWrapper<User>();
query.like("username", userName);
return userService.getOne(query);
}
// 查
@RequestMapping(value = "/getId", method = { RequestMethod.GET })
@ResponseBody
public Object getId(@RequestParam Integer id) {
return userService.getById(id);
}
// 查
@RequestMapping(value = "/getPage", method = { RequestMethod.POST })
@ResponseBody
public Object getPage(@RequestBody Map<String, Object> parame) {
Page<User> page = this.initPageBounds(parame);
return userService.page(page);
}
}
entity 定义
package com.zzg.entity;
import java.io.Serializable;
import java.util.Date;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.Data;
@SuppressWarnings("serial")
@Data
@TableName("user")
public class User implements Serializable {
@TableId(value = "id", type = IdType.AUTO)
private Integer id;
private String username;
private String password;
private String email;
private String phone;
private String question;
private String answer;
private Integer role;
private Date createTime;
private Date updateTime;
}mapper 定义:
package com.zzg.mapper;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.zzg.entity.User;
public interface UserMapper extends BaseMapper<User> {
}service 和serviceImpl 定义:
package com.zzg.service;
import com.baomidou.mybatisplus.extension.service.IService;
import com.zzg.entity.User;
public interface UserService extends IService<User> {
}
package com.zzg.service.impl;
import org.springframework.stereotype.Service;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zzg.entity.User;
import com.zzg.mapper.UserMapper;
import com.zzg.service.UserService;
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
}
项目涉及（common、util之转换、程序入口、全局配置对象）
common 之公共抽象Controller
package com.zzg.common.controller;
import java.util.Map;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.zzg.util.converter.SimpleTypeConverterUtil;
public abstract class AbstractController<T> {
public static final String PAGE = "page";
public static final String LIMIT = "limit";
/**
* 参数分页参数转换校验
*
* @param param
* @return
*/
protected Page<T> initPageBounds(Map<String, Object> param) {
int page = SimpleTypeConverterUtil.convertIfNecessary(param.get(PAGE), int.class);
int limit = SimpleTypeConverterUtil.convertIfNecessary(param.get(LIMIT), int.class);
// 页码和页数取消最大限制
page = (page <= 0) ? 1 : page;
limit = (limit <= 0) ? 10 : limit;
return new Page<T>(page, limit);
}
}
Util之数据类型转换：
package com.zzg.util.converter;
import java.util.Date;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.SimpleTypeConverter;
public class SimpleTypeConverterUtil {
public static final Logger log = LoggerFactory.getLogger(SimpleTypeConverterUtil.class);
private static final SimpleTypeConverter typeConverterDelegate = new SimpleTypeConverter();
static{
typeConverterDelegate.registerCustomEditor(Date.class, new DateEditor());
}
/**
* @param <T>
* @param value 待转换值,一般字符串
* @param requiredType 转后类型类对象
* @return
*/
public static <T> T convertIfNecessary(Object value, Class<T> requiredType) {
T rs = null;
try {
rs = typeConverterDelegate.convertIfNecessary(value, requiredType);
} catch (Exception e) {
log.info(e.getMessage());
if(requiredType == int.class || requiredType == Integer.class){
rs = (T)Integer.valueOf(0);
}
}
return rs;
}
}
package com.zzg.util.converter;
import java.lang.management.ManagementFactory;
import java.text.DateFormat;
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DateUtils {
public static final Logger log = LoggerFactory.getLogger(DateUtils.class);
public static final String YYYY = "yyyy" ;
public static final String YYYY_MM = "yyyy-MM" ;
public static final String YYYY_MM_DD = "yyyy-MM-dd" ;
public static final String YYYYMMDDHHMMSS = "yyyyMMddHHmmss" ;
public static final String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss" ;
private static String[] parsePatterns = {
YYYY_MM_DD , YYYY_MM_DD_HH_MM_SS , "yyyy-MM-dd HH:mm" , YYYY_MM ,
"yyyy/MM/dd" , "yyyy/MM/dd HH:mm:ss" , "yyyy/MM/dd HH:mm" , "yyyy/MM" ,
"yyyy.MM.dd" , "yyyy.MM.dd HH:mm:ss" , "yyyy.MM.dd HH:mm" , "yyyy.MM"};
/**
* 获取当前Date型日期
*
* @return Date() 当前日期
*/
public static Date getNowDate() {
return new Date();
}
/**
* 获取当前日期, 默认格式为yyyy-MM-dd
*
* @return String
*/
public static String getDate() {
return dateTimeNow(YYYY_MM_DD);
}
public static final String getTime() {
return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
}
public static final String dateTimeNow() {
return dateTimeNow(YYYYMMDDHHMMSS);
}
public static final String dateTimeNow(final String format) {
return parseDateToStr(format, new Date());
}
public static final String dateTime(final Date date) {
return parseDateToStr(YYYY_MM_DD, date);
}
public static final String parseDateToStr(final String format, final Date date) {
if (date == null) {
return null;
}
Format formatter = new SimpleDateFormat(format);
return formatter.format(date);
}
/**
* 获取服务器启动时间
*/
public static Date getServerStartDate() {
long time = ManagementFactory.getRuntimeMXBean().getStartTime();
return new Date(time);
}
private static final List<DateFormat> formarts = new ArrayList<>(5);
static {
formarts.add(new SimpleDateFormat("yyyy-MM"));
formarts.add(new SimpleDateFormat("yyyy-MM-dd"));
formarts.add(new SimpleDateFormat("yyyy-MM-dd hh:mm"));
formarts.add(new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"));
formarts.add(new SimpleDateFormat("yyyy.MM.dd"));
}
public static Date formatDateStr(String source) {
String value = source.trim();
if ("".equals(value)) {
return null;
}
try {
if (source.matches("^\\d{4}-\\d{1,2}$")) {
return formarts.get(0).parse(source);
} else if (source.matches("^\\d{4}-\\d{1,2}-\\d{1,2}$")) {
return formarts.get(1).parse(source);
} else if (source.matches("^\\d{4}-\\d{1,2}-\\d{1,2} {1}\\d{1,2}:\\d{1,2}$")) {
return formarts.get(2).parse(source);
} else if (source.matches("^\\d{4}-\\d{1,2}-\\d{1,2} {1}\\d{1,2}:\\d{1,2}:\\d{1,2}$")) {
return formarts.get(3).parse(source);
} else if (source.matches("^\\d{4}.\\d{1,2}.\\d{1,2}$")) {
return formarts.get(4).parse(source);
} else {
throw new IllegalArgumentException("Invalid boolean value '" + source + "'");
}
} catch (Exception e) {
log.warn("DateUtils.formatDateStr error", e);
return null;
}
}
/**
* 计算两个时间差
*/
public static String getDatePoor(Date endDate, Date nowDate) {
long nd = (long)1000 * 24 * 60 * 60;
long nh = (long)1000 * 60 * 60;
long nm = (long)1000 * 60;
// 获得两个时间的毫秒时间差异
long diff = endDate.getTime() - nowDate.getTime();
// 计算差多少天
long day = diff / nd;
// 计算差多少小时
long hour = diff % nd / nh;
// 计算差多少分钟
long min = diff % nd % nh / nm;
// 计算差多少秒//输出结果
return day + "天" + hour + "小时" + min + "分钟" ;
}
}
package com.zzg.util.converter;
import java.beans.PropertyEditorSupport;
public class DateEditor extends PropertyEditorSupport {
@Override
public void setAsText(String text) throws IllegalArgumentException {
setValue(DateUtils.formatDateStr(text));
}
}
程序入口：
package com.zzg;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
@MapperScan("com.zzg.mapper")
public class CRMApplication {
public static void main(String[] args) {
// TODO Auto-generated method stub
SpringApplication.run(CRMApplication.class, args);
System.out.println("============= SpringBoot CRM Project Start Success =============");
}
}
全局配置对象
package com.zzg.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
@Configuration
public class MybatisPlusConfig {
/**
* 分页插件
*/
@Bean
public PaginationInterceptor paginationInterceptor() {
PaginationInterceptor page = new PaginationInterceptor();
//设置方言类型
page.setDialectType("mysql");
return page;
}
}
项目初始化SQL
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户表id',
`username` varchar(50) NOT NULL COMMENT '用户名',
`password` varchar(50) NOT NULL COMMENT '用户密码，MD5加密',
`email` varchar(50) DEFAULT NULL,
`phone` varchar(20) DEFAULT NULL,
`question` varchar(100) DEFAULT NULL COMMENT '找回密码问题',
`answer` varchar(100) DEFAULT NULL COMMENT '找回密码答案',
`role` int(4) NOT NULL COMMENT '角色0-管理员,1-普通用户',
`create_time` datetime NOT NULL COMMENT '创建时间',
`update_time` datetime NOT NULL COMMENT '最后一次更新时间',
PRIMARY KEY (`id`),
UNIQUE KEY `user_name_unique` (`username`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=22 DEFAULT CHARSET=utf8;
SET FOREIGN_KEY_CHECKS = 1;
INSERT INTO `user`(`id`, `username`, `password`, `email`, `phone`, `question`, `answer`, `role`, `create_time`, `update_time`) VALUES (1, 'admin', '432D38237BD939443EC5D48E24FD3B1A', 'admin@admin.com', '13800138000', '问题', '答案', 1, '2016-11-06 16:56:45', '2017-04-04 19:27:36');
技术文档:
github 代码地址:https://github.com/zhouzhiwengang/crm_sys.git
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