Mybatis-Plus 自定义mapper批量新增修改函数

version

<dependency>
	<groupId>com.baomidougroupId>
    <artifactId>mybatis-plus-boot-starterartifactId>
    <version>3.5.3.1version>
dependency>

MybatisPlusConfig

import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author 954L
 * @wechat w_954L
 * @email [email protected]
 * @create 2020/10/6 21:39
 */
@Configuration
public class MybatisPlusConfig {

    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor(){
        MybatisPlusInterceptor mp = new MybatisPlusInterceptor();
        mp.addInnerInterceptor(new PaginationInnerInterceptor());
        return mp;
    }

    @Bean
    public CustomizedSqlInjector customizedSqlInjector() {
        return new CustomizedSqlInjector();
    }

}

CustomizedSqlInjector

import com.baomidou.mybatisplus.core.injector.AbstractMethod;
import com.baomidou.mybatisplus.core.injector.DefaultSqlInjector;
import com.baomidou.mybatisplus.core.metadata.TableInfo;

import java.util.List;

/**
 * @author 954L
 * @wechat w_954L
 * @email [email protected]
 * @create 2023/8/10 16:26
 */
public class CustomizedSqlInjector extends DefaultSqlInjector {

    @Override
    public List<AbstractMethod> getMethodList(Class<?> mapperClass, TableInfo tableInfo) {
        List<AbstractMethod> methodList = super.getMethodList(mapperClass, tableInfo);
        methodList.add(new InsertBatchMethod("insertBatch"));
        methodList.add(new UpdateBatchMethod("updateBatch"));
        return methodList;
    }

}

InsertBatchMethod

import com.baomidou.mybatisplus.core.injector.AbstractMethod;
import com.baomidou.mybatisplus.core.metadata.TableInfo;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.executor.keygen.NoKeyGenerator;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlSource;

/**
 * @author 954L
 * @wechat w_954L
 * @email [email protected]
 * @create 2023/8/10 16:23
 */
@Slf4j
public class InsertBatchMethod extends AbstractMethod {

    protected InsertBatchMethod(String methodName) { super(methodName); }

    @Override
    public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
        final String sql = "";
        final String fieldSql = prepareFieldSql(tableInfo);
        final String valueSql = prepareValuesSql(tableInfo);
        final String sqlResult = String.format(sql, tableInfo.getTableName(), fieldSql, valueSql);
        SqlSource sqlSource = languageDriver.createSqlSource(configuration, sqlResult, modelClass);
        return this.addInsertMappedStatement(mapperClass, modelClass, "insertBatch",
                sqlSource, new NoKeyGenerator(), null, null);
    }

    private String prepareFieldSql(TableInfo tableInfo) {
        StringBuilder fieldSql = new StringBuilder();
        fieldSql.append(tableInfo.getKeyColumn()).append(",");
        tableInfo.getFieldList().forEach(x -> fieldSql.append(x.getColumn()).append(","));
        fieldSql.delete(fieldSql.length() - 1, fieldSql.length());
        fieldSql.insert(0, "("); fieldSql.append(")");
        return fieldSql.toString();
    }

    private String prepareValuesSql(TableInfo tableInfo) {
        final StringBuilder valueSql = new StringBuilder();
        valueSql.append("");
        valueSql.append("#{item.").append(tableInfo.getKeyProperty()).append("},");
        tableInfo.getFieldList().forEach(x -> valueSql.append("#{item.").append(x.getProperty()).append("},"));
        valueSql.delete(valueSql.length() - 1, valueSql.length());
        valueSql.append("");
        return valueSql.toString();
    }
}

UpdateBatchMethod

import com.baomidou.mybatisplus.core.injector.AbstractMethod;
import com.baomidou.mybatisplus.core.metadata.TableInfo;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlSource;

/**
 * @author 954L
 * @wechat w_954L
 * @email [email protected]
 * @create 2023/8/10 16:23
 */
@Slf4j
public class UpdateBatchMethod extends AbstractMethod {

    protected UpdateBatchMethod(String methodName) { super(methodName); }

    @Override
    public MappedStatement injectMappedStatement(Class<?> mapperClass, Class<?> modelClass, TableInfo tableInfo) {
        String sql = "";
        String additional = tableInfo.isWithVersion() ? tableInfo.getVersionFieldInfo().getVersionOli("item", "item.") : "" + tableInfo.getLogicDeleteSql(true, true);
        String setSql = sqlSet(tableInfo.isWithLogicDelete(), false, tableInfo, false, "item", "item.");
        String sqlResult = String.format(sql, tableInfo.getTableName(), setSql, tableInfo.getKeyColumn(), "item." + tableInfo.getKeyProperty(), additional);
        SqlSource sqlSource = languageDriver.createSqlSource(configuration, sqlResult, modelClass);
        return this.addUpdateMappedStatement(mapperClass, modelClass, "updateBatch", sqlSource);
    }

}

RootMapper

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import org.apache.ibatis.annotations.Param;

import java.util.List;

/**
 * @author 954L
 * @wechat w_954L
 * @email [email protected]
 * @create 2023/8/10 16:21
 */
public interface RootMapper<T> extends BaseMapper<T> {

    int insertBatch(@Param("list") List<T> list);

    int updateBatch(@Param("list") List<T> list);

}

使用方式
mapper接口实现自定义的RootMapper，即可调用批量新增修改函数