mybatisplus添加真正的批量新增、批量更新的实现

mybatisplus添加真正的批量新增、批量更新的实现

使用mybatis-plus来进行批量新增和更新时，你会发现其实rzCAppdTTY是一条条sql执行,下面进行优化。

1.添加InsertBatchMethod和UpdateBatchMethod类

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.NoKeyGenerathttp://or;

import org.apache.ibatis.mapping.MappedStatement;

import org.apache.ibatis.mapping.SqlSource;

/**

* 批量插入方法实现

*/

@Slf4j

public class InsertBatchMethod extends AbstractMethod {

@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);

//log.debug("sqlResult----->{}", sqlResult);

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, frzCAppdTTYieldSql.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();

}

}

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;

/**

* 批量更新方法实现，条件为主键，选择性更新

*/

@Slf4j

public class UpdateBatchMethod extends AbstractMethod {

@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);

//log.debug("sqlResult----->{}", sqlResult);

SqlSource sqlSource = languageDriver.createSqlSource(configuration, sqlResult, modelClass);

// 第三个参数必须和RootMapper的自定义方法名一致

return this.addUpdateMappedStatement(mapperClass, modelClass, "updateBatch", sqlSource);

}

}

2.添加自定义方法SQL注入器

import com.baomidou.mybatisplus.core.injector.AbstractMethod;

import com.baomidou.mybatisplus.core.injector.DefaultSqlInjector;

import java.util.List;

public class CustomizedSqlInjector extends DefaultSqlInjector {

/**

* 如果只需增加方法，保留mybatis plus自带方法，

* 可以先获取super.getMethodList()，再添加add

*/

@Override

public List getMethodList(Class> mapperClass) {

List methodList = super.getMethodList(mapperClass);

methodList.add(new InsertBatchMethod());

methodList.add(new UpdateBatchMethod());

return methodList;

}

}

3.注入配置

@MapperScan("com.xxx.mapper")

@Configuration

public class MyBatisPlusConfig {

@Bean

public CustomizedSqlInjector customizedSqlInjector() {

return new CustomizedSqlInjector();

}

}

4.添加通用mapper

import com.baomidou.mybatisplus.core.mapper.BaseMapper;

import org.apache.ibatis.annotations.Param;

import java.util.List;

/**

* 根Mapper，给表Mapper继承用的，可以自定义通用方法

* {@link com.baomidou.mybatisplus.core.mapper.BaseMapper}

* {@link com.baomidorzCAppdTTYu.mybatisplus.extension.service.IService}

* {@link com.baomidou.mybatisplus.extension.service.impl.ServiceImpl}

*/

public interface RootMapper extends BaseMapper {

/**

* 自定义批量插入

* 如果要自动填充，@Param(xx) xx参数名必须是 list/collection/array 3个的其中之一

*/

int insertBatch(@Param("list") List list);

/**

* 自定义批量更新，条件为主键

* 如果要自动填充，@Param(xx) xx参数名必须是 list/collection/array 3个的其中之一

*/

int updateBatch(@Param("list") List list);

}

5.如何使用

@Repository

public interface UserInfoMapper extends RootMapper {

}

public interface UserInfoService extends IService {

int saveAll();

int updateAll();

}

@Service

public class UserInfoServiceImpl extends ServiceImpl implements UserInfoService{

@Override

public int saveAll() {

List list = new ArrayList<>();

for (int i = 0; i < 20; i++) {

UserInfo userInfo = new UserInfo();

userInfo.setUserName("厉害" + i);

userInfo.setSalt(RandomStringUtils.randomAlphabetic(6));

userInfo.setPassword(SecureUtil.sha256("123456" + userInfo.getSalt()));

userInfo.setSex(0);

userInfo.setAvatar(LoginServiceImpl.AVATAR);

list.add(userInfo);

}

return baseMapper.insertBatch(list);

}

@Override

public int updateAll() {

List userInfos = baseMapper.selectList(Wrappers.lambdaQuery().between(BaseEntity::getId, 43, 62));

userInfos.forEach(userInfo -> {

userInfo.setUserName("更新了" + IdUtil.simpleUUID());

});

return baseMapper.updateBatch(userInfos);

}

}

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