在【SpringBoot攻略六】基础上做如下修改：

pom.xml
我们删除mybatis-spring-boot-starter和pagehelper-spring-boot-starter依赖。
新增依赖：



    com.baomidou
    mybatis-plus-boot-starter
    3.0.5

application.properties
去掉mybatis和pagehelper的配置项
新增配置项：

#mybatis plus
mybatis-plus.configLocation=classpath:mybatis/mybatis-config.xml
mybatis-plus.mapperLocations=classpath*:/mybatis/**/*Mapper.xml
mybatis-plus.typeAliasesPackage=com.javasgj.springboot.mybatisplus.domain
mybatis-plus.typeAliasesSuperType=com.javasgj.springboot.mybatisplus.domain.BaseEntity

mybatis-config.xml
新增分页插件：

好了，开始实战

mybatisplus开发指南：https://mp.baomidou.com/

1、创建实体类
Pagination：

package com.javasgj.springboot.mybatisplus.domain;

import com.alibaba.fastjson.annotation.JSONField;
import com.baomidou.mybatisplus.annotation.TableField;

/**
 * 分页工具类
 */
public class Pagination {

    /**
     * 当前页码
     */
    @TableField(exist = false)
    @JSONField(serialize = false)
    protected int pageIndex;
    
    /**
     * 每页大小
     */
    @TableField(exist = false)
    @JSONField(serialize = false)
    protected int pageSize;
    
    
    public int getPageIndex() {
        return pageIndex;
    }
    public void setPageIndex(int pageIndex) {
        this.pageIndex = pageIndex;
    }
    public int getPageSize() {
        return pageSize;
    }
    public void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }
}

BaseEntity：

package com.javasgj.springboot.mybatisplus.domain;

import java.util.Date;

import com.alibaba.fastjson.annotation.JSONField;
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;

/**
 * 基础实体类
 */
public class BaseEntity extends Pagination {

    // 主键
    @TableId(type=IdType.UUID)
    protected String id;
    
    // 创建人
    protected String cjrId;
    protected String cjr;
    @JSONField(format = "yyyy-MM-dd HH:mm:ss")
    protected Date cjSj;
    
    // 更新人
    protected String gxrId;
    protected String gxr;
    @JSONField(format = "yyyy-MM-dd HH:mm:ss")
    protected Date gxSj;
    
    
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getCjrId() {
        return cjrId;
    }
    public void setCjrId(String cjrId) {
        this.cjrId = cjrId;
    }
    public String getCjr() {
        return cjr;
    }
    public void setCjr(String cjr) {
        this.cjr = cjr;
    }
    public Date getCjSj() {
        return cjSj;
    }
    public void setCjSj(Date cjSj) {
        this.cjSj = cjSj;
    }
    public String getGxrId() {
        return gxrId;
    }
    public void setGxrId(String gxrId) {
        this.gxrId = gxrId;
    }
    public String getGxr() {
        return gxr;
    }
    public void setGxr(String gxr) {
        this.gxr = gxr;
    }
    public Date getGxSj() {
        return gxSj;
    }
    public void setGxSj(Date gxSj) {
        this.gxSj = gxSj;
    }
}

Commonfile：

package com.javasgj.springboot.mybatisplus.domain;

import com.baomidou.mybatisplus.annotation.TableName;

@TableName("t_c_file")
public class Commonfile extends BaseEntity {
    
    // 以下为实体类对应表的所有字段
    private String name;
    private Long size;
    private String path;
    private String type;
    private String ywId;
    
    // 额外辅助字段
    
    
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Long getSize() {
        return size;
    }
    public void setSize(Long size) {
        this.size = size;
    }
    public String getPath() {
        return path;
    }
    public void setPath(String path) {
        this.path = path;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    public String getYwId() {
        return ywId;
    }
    public void setYwId(String ywId) {
        this.ywId = ywId;
    }
}

2、创建mapper
CommonfileMapper：

package com.javasgj.springboot.mybatisplus.dao;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.javasgj.springboot.mybatisplus.domain.Commonfile;

public interface CommonfileMapper extends BaseMapper {
    
    public void updateAllColumnById(Commonfile commonfile);
}

src/main/resources创建xml配置sql
mybatis/common/CommonfilePlusMapper.xml





    
    
        update t_c_file
        
            
                name = #{name},
            
            
                name = null,
            
            
                size = #{size},
            
            
                size = null,
            
            
                path = #{path},
            
            
                path = null,
            
            
                type = #{type},
            
            
                type = null,
            
            
                yw_id = #{ywId},
            
            
                yw_id = null,
            
        
        where id = #{id}

3、创建service
CommonfileService：

package com.javasgj.springboot.mybatisplus.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.javasgj.springboot.mybatisplus.domain.Commonfile;

public interface CommonfileService extends IService {

    public void updateAllColumnById(Commonfile commonfile);
}

CommonfileServiceImpl：

package com.javasgj.springboot.mybatisplus.service;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.javasgj.springboot.mybatisplus.dao.CommonfileMapper;
import com.javasgj.springboot.mybatisplus.domain.Commonfile;

@Service
public class CommonfileServiceImpl extends ServiceImpl implements CommonfileService {

    @Override
    @Transactional
    public void updateAllColumnById(Commonfile commonfile) {
        
        this.baseMapper.updateAllColumnById(commonfile);
    }
}

4、创建controller
CommonfileController：

package com.javasgj.springboot.mybatisplus.controller;

import java.util.Arrays;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
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.RestController;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.javasgj.springboot.mybatisplus.domain.Commonfile;
import com.javasgj.springboot.mybatisplus.service.CommonfileService;
import com.javasgj.springboot.mybatisplus.utils.StringUtil;

/**
 * 公共附件管理模块
 */
@RestController
@RequestMapping("/commonfile")
public class CommonfileController {
    
    @Autowired
    private CommonfileService commonfileService;
    
    @RequestMapping(value="findById", method=RequestMethod.GET)
    public Commonfile findById(String id, HttpServletRequest request, HttpServletResponse response) {
        
        return commonfileService.getById(id);
    }

    @RequestMapping(value="findByPage", method=RequestMethod.POST)
    public IPage findByPage(@RequestBody Commonfile commonfile, HttpServletRequest request, HttpServletResponse response) {
        
        Page page = new Page();
        page.setCurrent(commonfile.getPageIndex());
        page.setSize(commonfile.getPageSize());
        
        QueryWrapper queryWrapper = new QueryWrapper();
        if(!StringUtil.isEmpty(commonfile.getName())) {
            queryWrapper.like("name", commonfile.getName());
        }
        return commonfileService.page(page, queryWrapper);
    }
    
    @RequestMapping(value="findAll", method=RequestMethod.POST)
    public List findAll(@RequestBody Commonfile commonfile, HttpServletRequest request, HttpServletResponse response) {
        
        QueryWrapper queryWrapper = new QueryWrapper();
        if(!StringUtil.isEmpty(commonfile.getName())) {
            queryWrapper.like("name", commonfile.getName());
        }
        return commonfileService.list(queryWrapper);
    }

    @RequestMapping(value="save", method=RequestMethod.POST)
    public void save(@RequestBody Commonfile commonfile, HttpServletRequest request, HttpServletResponse response) {
        
        commonfileService.save(commonfile);
    }

    @RequestMapping(value="update", method=RequestMethod.POST)
    public void update(@RequestBody Commonfile commonfile, HttpServletRequest request, HttpServletResponse response) {
        
        commonfileService.updateAllColumnById(commonfile);
    }
    
    @RequestMapping(value="deleteById", method=RequestMethod.POST)
    public void deleteById(@RequestBody Commonfile commonfile, HttpServletRequest request, HttpServletResponse response) {
        
        commonfileService.removeByIds(Arrays.asList(commonfile.getId().split(",")));
    }   
}

5、应用启动类

package com.javasgj.springboot.mybatisplus;

import java.util.ArrayList;
import java.util.List;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.transaction.annotation.EnableTransactionManagement;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

/**
 * spring boot应用启动类
 * @MapperScan：mybatis Mapper接口扫描，如果不加此注解，那么必须在Mapper接口上加@Mapper
 */
@SpringBootApplication
@EnableTransactionManagement
@MapperScan("com.javasgj.springboot.mybatisplus.**.dao")
public class Application {
    
    public static void main(String[] args) {
        
        SpringApplication.run(Application.class, args);
    }
    
    /**
     * fastjson替换默认的jackjson(springmvc)
     * @return
     */
    @Bean
    public HttpMessageConverters fastJsonHttpMessageConverters() {
        
        FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.WriteMapNullValue, 
                                            SerializerFeature.WriteNullListAsEmpty);
        fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);

        // 处理中文乱码问题
        List fastMediaTypes = new ArrayList<>();
        fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        fastJsonHttpMessageConverter.setSupportedMediaTypes(fastMediaTypes);
        
        HttpMessageConverter converter = fastJsonHttpMessageConverter;
        return new HttpMessageConverters(converter);
    }
}

6、测试，使用postman
findById：
get方式：http://127.0.0.1:8080/springboot/commonfile/findById?id=6ff2a63a45da4f27bdd8f292c3b24c27

findByPage：
post方式：http://127.0.0.1:8080/springboot/commonfile/findByPage
Headers头添加：Content-Type：application/json
Body中选择raw：{"pageIndex": "1", "pageSize": "2"}

findAll：
post方式：http://127.0.0.1:8080/springboot/commonfile/findAll
Headers头添加：Content-Type：application/json
Body中选择raw：{"name": "86"}

save：
post方式：http://127.0.0.1:8080/springboot/commonfile/save
Headers头添加：Content-Type：application/json
Body中选择raw：{"name": "86"}

update：
post方式：http://127.0.0.1:8080/springboot/commonfile/update
Headers头添加：Content-Type：application/json
Body中选择raw：{"id":"0e821cf5423a4877899a1649a6de650e", "name": "86111"}

deleteById：
post方式：http://127.0.0.1:8080/springboot/commonfile/deleteById
Headers头添加：Content-Type：application/json
Body中选择raw：{"id":"0e821cf5423a4877899a1649a6de650e,57bb99851d9947208569540d28c1c453"}

OK，整合完了！

SpringBoot攻略七、集成mybatisplus实战

在【SpringBoot攻略六】基础上做如下修改：

好了，开始实战

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