Mybatisplus分页插件的使用
1、加maven依赖
com.baomidou
mybatis-plus
${mybatis-plus.version}
2、加配置
3、新建一个MybatisPlusConfig配置类文件
package com.szss.admin.config.mybatisplus;
import com.baomidou.mybatisplus.plugins.PaginationInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
@MapperScan("com.szss.admin.dao.*")
public class MybatisPlusConfig {
/**
* mybatis-plus分页插件
* 文档：http://mp.baomidou.com
*/
@Bean
public PaginationInterceptor paginationInterceptor() {
PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
return paginationInterceptor;
}
}4、Controller层代码
@PostMapping("/list")
@ApiOperation(value = "查询列表")
public R list(@RequestParam(value = "current", defaultValue = "1")int current,
@RequestParam(value = "size", defaultValue = "10")int size, SafeTrainEntity safeTrainEntity) {
Page page = new Page(current, size);
String title = safeTrainEntity.getTitle();
String annexName = safeTrainEntity.getAnnexName();
Wrapper wrapper = getWrapper(safeTrainEntity);
if(title!=null){
safeTrainEntity.setTitle(null);
wrapper = getWrapper(safeTrainEntity);
wrapper.like("title",title);
}
if(annexName!=null){
safeTrainEntity.setAnnexName(null);
wrapper = getWrapper(safeTrainEntity);
wrapper.like("annex_name",annexName);
}
Page pageData = safeTrainService.selectPage(page, wrapper);
R r = R.ok();
r.put("data", pageData);
return r;
} 另一个版本写sql语句的
@PostMapping("/list")
@ApiOperation(value = "查询列表")
public R list(@RequestParam(value = "current", defaultValue = "1")int current,
@RequestParam(value = "size", defaultValue = "10")int size, SafeTrainEntity safeTrainEntity) {
Page page = new Page(current, size);
Page pageData = safeTrainService.selectSafeTrainList(page,safeTrainEntity);
R r = R.ok();
r.put("data", pageData);
return r;
} 5、如果第二种就需要写service和mapper了
package com.as.service.safetrain;
import com.as.entity.safetrain.SafeTrainEntity;
import com.baomidou.mybatisplus.plugins.Page;
import com.baomidou.mybatisplus.service.IService;
import org.apache.ibatis.annotations.Param;
public interface SafeTrainService extends IService {
Page selectSafeTrainList(Page page, @Param("safeTrainEntity") SafeTrainEntity safeTrainEntity);
} package com.as.service.impl.safetrain;
import com.as.dao.safetrain.SafeTrainMapper;
import com.as.entity.safetrain.SafeTrainEntity;
import com.as.service.safetrain.SafeTrainService;
import com.baomidou.mybatisplus.plugins.Page;
import com.baomidou.mybatisplus.service.impl.ServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class SafeTrainServiceImpl extends ServiceImpl implements SafeTrainService {
@Autowired
private SafeTrainMapper safeTrainMapper;
@Override
public Page selectSafeTrainList(Page page, SafeTrainEntity safeTrainEntity) {
List safeTrainEntities = safeTrainMapper.querySafeTrainList(page, safeTrainEntity);
return page.setRecords(safeTrainEntities);
}
} package com.as.dao.safetrain;
import com.as.entity.safetrain.SafeTrainEntity;
import com.baomidou.mybatisplus.mapper.BaseMapper;
import com.baomidou.mybatisplus.plugins.Page;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import java.util.List;
@Mapper
public interface SafeTrainMapper extends BaseMapper {
List querySafeTrainList(Page page, @Param("safeTrainEntity") SafeTrainEntity safeTrainEntity);
}