mybatis用法(三)mybatis保存CLOB类型到oracle数据库实例

1.背景

近期项目中遇到了用mybatis保存数据库CLOB类型到oracle库的操作,记录一下,方便以后查阅。

2.实例代码

2.1 表结构

--判断表是否存在，如果存在则删除  
-- drop table WMS_IN_POOL;   
   
-- Create table 
create table WMS_IN_POOL  
(   
  POOL_PK_NO  NUMBER NOT NULL,
  BIG_DATA    CLOB default NULL,
  CREATE_TIME DATE default SYSDATE,
  UPDATE_TIME DATE
);
 
-- Add comments to the table     
comment on table VENDOR_CHECK_WAY is 'CLOB测试表';   
   
-- Add comments to the columns      
COMMENT ON COLUMN WMS_IN_POOL.POOL_PK_NO IS '主键ID(自增)';
COMMENT ON COLUMN WMS_IN_POOL.BIG_DATA  IS '存储json字符串,大数据值';
COMMENT ON COLUMN VENDOR_CHECK_WAY.CREATE_TIME  IS '创建时间';
COMMENT ON COLUMN VENDOR_CHECK_WAY.UPDATE_TIME  IS '修改时间';

-- Create/Recreate primary, unique and foreign key constraints     
alter table WMS_IN_POOL    
  add constraint WMS_IN_POOL primary key (POOL_PK_NO);

-- Create sequence     
create sequence SEQ_POOL_PK_NO    
minvalue 1    -- 最小值=1    
maxvalue 999999999999999999999999999  -- 指定最大值     
   
start with 1   -- 从1开始    
increment by 1  -- 每次递增1    
cache 20;
    
-- Create Index  --> clob can not create index
-- create index index_big_data on WMS_IN_POOL(BIG_DATA);

-- commit
commit;

效果图:

2.2 实体类 WmsInPool.java

import java.math.BigDecimal;
import java.util.Date;

public class WmsInPool implements java.io.Serializable {

	private static final long serialVersionUID = 1L;

	/** 主键id*/
    private BigDecimal poolPkNo;
    
    /** clob类型数据字段*/
    private String bigData;

    /** 创建时间*/
    private Date createTime;
    
    /** 更新时间*/
    private Date updateTime;

	public BigDecimal getPoolPkNo() {
		return poolPkNo;
	}

	public void setPoolPkNo(BigDecimal poolPkNo) {
		this.poolPkNo = poolPkNo;
	}

	public String getBigData() {
		return bigData;
	}

	public void setBigData(String bigData) {
		this.bigData = bigData;
	}

	public Date getCreateTime() {
		return createTime;
	}

	public void setCreateTime(Date createTime) {
		this.createTime = createTime;
	}

	public Date getUpdateTime() {
		return updateTime;
	}

	public void setUpdateTime(Date updateTime) {
		this.updateTime = updateTime;
	}
    
}

2.3 mybatis映射文件 WmsInPoolMapper.xml

  
    
    
    
    
  
  
  
    POOL_PK_NO,BIG_DATA,CREATE_TIME,UPDATE_TIME
  
  
  
    select 
    
    from WMS_IN_POOL
    where POOL_PK_NO = #{poolPkNo,jdbcType=DECIMAL}
  
  
  
    delete from WMS_IN_POOL
    where POOL_PK_NO = #{poolPkNo,jdbcType=DECIMAL}
  
  
  
  	
        SELECT nvl(max(POOL_PK_NO),0)+1 from WMS_IN_POOL
    
    insert into WMS_IN_POOL (POOL_PK_NO,BIG_DATA,CREATE_TIME,UPDATE_TIME)
    values (
      #{poolPkNo,jdbcType=DECIMAL},#{bigData,jdbcType=CLOB},  
      #{createTime,jdbcType=TIMESTAMP},#{updateTime,jdbcType=TIMESTAMP}
    )
  
  
  
    insert into WMS_IN_POOL
    
      
        POOL_PK_NO,
      
      
        BIG_DATA,
      
      
        CREATE_TIME,
      
      
        UPDATE_TIME,
      
    
    
      
        #{poolPkNo,jdbcType=DECIMAL},
      
      
        #{bigData,jdbcType=CLOB},
      
      
        #{createTime,jdbcType=TIMESTAMP},
      
      
        #{updateTime,jdbcType=TIMESTAMP},
      
    
  
  
  
    update WMS_IN_POOL
    
      
        BIG_DATA = #{bigData,jdbcType=CLOB},
      
      
        UPDATE_TIME = #{updateTime,jdbcType=TIMESTAMP},
      
    
    where POOL_PK_NO = #{poolPkNo,jdbcType=DECIMAL}
  
  
  
    update WMS_IN_POOL
    set BIG_DATA = #{bigDdata,jdbcType=CLOB},
      UPDATE_TIME = #{updateTime,jdbcType=TIMESTAMP}
    where POOL_PK_NO = #{poolPkNo,jdbcType=DECIMAL}
  
	
  
		insert into WMS_IN_POOL(
		POOL_PK_NO,BIG_DATA,CREATE_TIME,UPDATE_TIME) 
		select SEQ_POOL_PK_NO.NEXTVAL, A.* from(
		
			SELECT
			#{item.bigData,jdbcType=CLOB},
			#{item.createTime,jdbcType=TIMESTAMP},
			#{item.updateTime,jdbcType=TIMESTAMP} 
			from dual
		
		) A
  
  

2.4 dao层接口(没有实现类的哦)

import cn.wlw.mgt.entity.WmsInPool;
import java.math.BigDecimal;
import java.util.List;
import org.apache.ibatis.annotations.Param;

public interface WmsInPoolMapper {
	/**
	 * 
	 * @param poolPkNo
	 * @return
	 */
    public int deleteByPrimaryKey(BigDecimal poolPkNo);

    /**
     * 
     * @param record
     * @return
     */
    public int insert(WmsInPool record);

    /**
     * 
     * @param record
     * @return
     */
    public int insertSelective(WmsInPool record);

    /**
     * 
     * @param poolPkNo
     * @return
     */
    public WmsInPool selectByPrimaryKey(BigDecimal poolPkNo);

    /**
     * 
     * @param record
     * @return
     */
    public int updateByPrimaryKeySelective(WmsInPool record);

    /**
     * 
     * @param record
     * @return
     */
    public int updateByPrimaryKey(WmsInPool record);

    /**
     * @param wmsInPools
     * @return
     */
    public int batchInsertWmsInPool(@Param("wmsInPools") List wmsInPools);
}

2.5 service层接口及实现类

WmsInPoolService.java

import java.util.List;
import cn.wlw.mgt.entity.WmsInPool;

public interface WmsInPoolService {

	/**
	 * 批量插入数据
	 * @param list
	 * @return
	 */
	public Integer batchInsertWmsInPool(List list);

}

WmsInPoolServiceImpl.java

import java.util.List;
import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import cn.wlw.mgt.dao.WmsInPoolMapper;
import cn.wlw.mgt.entity.WmsInPool;
import cn.wlw.mgt.service.WmsInPoolService;

@Service
public class WmsInPoolServiceImpl implements WmsInPoolService {
	
	private static final Logger logger = LoggerFactory.getLogger(WmsInPoolServiceImpl.class);
	
	@Autowired
	private WmsInPoolMapper wmsInPoolMapper;

	@Override
	@Transactional
	public Integer batchInsertWmsInPool(List list) {
		int addFlag = 0;
		long start1 = System.currentTimeMillis();
		if(list != null && list.size() > 0){
			
			for(WmsInPool addWmsInPool:list){
				try {
					logger.info("新增wms_in_pool表参数=["+ReflectionToStringBuilder.toString(addWmsInPool)+"]");
					addFlag = wmsInPoolMapper.insert(addWmsInPool);
				} catch (Exception e) {
					logger.error("单个新增wms_in_pool表失败,原因为:"+e.getMessage(),e);
					throw new RuntimeException("单个新增wms_in_pool表失败,原因为:"+e.getMessage());
				}
				
				//判断新增结果
				if(addFlag != 1){
					logger.error("单个新增wms_in_pool表失败,原因为:数据库没有执行任何操作!");
					throw new RuntimeException("单个新增wms_in_pool表失败,原因为:数据库没有执行任何操作!");
				}
			}//END for
			
			/*try {
				addFlag = wmsInPoolMapper.batchInsertWmsInPool(list);
			} catch (Exception e) {
				logger.error("批量新增wms_in_pool表失败,原因为:" + e.getMessage(), e);
				throw new RuntimeException("批量新增wms_in_pool表失败,原因为:" + e.getMessage());
			}*/
			
			//重新赋值
			addFlag = 1;
		}
		
		long start2 = System.currentTimeMillis();
		logger.info("批量新增wms_in_pool表成功,一共耗时="+(start2-start1)+"毫秒！");
		//返回结果
		return addFlag;
	}
}

2.6 spring配置

Spring整合MyBatis使用自动扫描的方式,即可；代码 略...

2.7 测试数据

检查配置文件,启动项目后,即可走正常的测试流程。