1. 数据库表 req_seq
CREATE TABLE req_seq ( req_id VARCHAR2(36) PRIMARY KEY, seq VARCHAR2(100), req_xml CLOB, req_time DATE );
2. 实体类
import java.io.Serializable; import java.sql.Timestamp; import java.text.SimpleDateFormat; public class ReqSeqBean implements Serializable { /** * @Fields serialVersionUID : TODO */ private static final long serialVersionUID = -4200518336372141644L; // 主键 private String reqId; // 请求序列 private String req; // 请求XML private String reqXml; // 请求时间 private Timestamp reqTime; public String toString() { SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); StringBuffer buf = new StringBuffer("ReqSeqBean:["); buf.append("reqId=").append(reqId).append(", "); buf.append("req=").append(req).append(", "); buf.append("reqXml=").append(reqXml).append(", "); buf.append("reqTime=").append(df.format(reqTime)); return buf.toString(); } // 省略 setter/getter }
注意: 数据库表中,REQ_XML 的类型是 CLOB,实体类中是 String
3. DAO层配置
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> <beans> <bean id="nativeJdbcExtractor" class="org.springframework.jdbc.support.nativejdbc.CommonsDbcpNativeJdbcExtractor" lazy-init="true"/> <bean id="oracleLobHandler" class="org.springframework.jdbc.support.lob.OracleLobHandler" lazy-init="true"> <property name="nativeJdbcExtractor" ref="nativeJdbcExtractor"/> </bean> <bean id="reqSeqDAO" class="com.dao.ReqSeqDAO"> <property name="jdbcTemplate" ref="jdbcTemplate" /> <property name="hisJdbcTemplate" ref="jdbcTemplate" /> <property name="lobHandler" ref="oracleLobHandler"/> </bean> </beans>
4. DAO
import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.dao.DataAccessException; import org.springframework.jdbc.core.RowMapper; import org.springframework.jdbc.core.support.AbstractLobCreatingPreparedStatementCallback; import org.springframework.jdbc.support.lob.LobCreator; import org.springframework.jdbc.support.lob.LobHandler; public class ReqSeqDAO extends BaseDao { private static final Logger log = LoggerFactory.getLogger(ReqSeqDAO.class); private LobHandler lobHandler; /** * @Title: addReqSeq * @deprecated: 如果字段REQ_XML是clob类型,则用此方法,但是需要oracle版本和jdk版本一致 * @param bean * @throws Exception * @author * @date 2013年10月23日 */ public void addReqSeq(final ReqSeqBean bean) throws Exception { StringBuffer sql = new StringBuffer(); sql.append("INSERT INTO REQ_SEQ(REQ_ID, SEQ, REQ_XML, REQ_TIME) "); sql.append("VALUES(SYS_GUID(), ?, ?, "); sql.append("TO_DATE(TO_CHAR(SYSDATE,'yyyy-MM-dd hh24:mi:ss'),'yyyy-MM-dd hh24:mi:ss'))"); getJdbcTemplate().execute(sql.toString(), new AbstractLobCreatingPreparedStatementCallback(lobHandler) { @Override protected void setValues(PreparedStatement ps, LobCreator lobCreator) throws SQLException, DataAccessException { ps.setString(1, bean.getReq()); lobCreator.setClobAsString(ps, 2, bean.getReqXml()); } }); } /** * @Title: queryReqSeqList * @deprecated: 按条件查找请求序列信息(如果字段REQ_XML是clob类型,则用此方法,但是需要oracle版本和jdk版本一致) * @param bean * 查询条件 * @return List * @throws Exception * @author * @date 2013年10月23日 */ public List<ReqSeqBean> queryReqSeqList(ReqSeqBean bean) throws Exception { StringBuffer sql = new StringBuffer( "SELECT * FROM REQ_SEQ WHERE 1 = 1 "); // 查询条件 List<String> params = new ArrayList<String>(1); if (null != bean) { /* 添加查询条件 */ if (null != bean.getReq()) { // 请求序列号 sql.append(" AND SEQ = ? "); params.add(bean.getReq()); } } sql.append(" ORDER BY REQ_TIME DESC"); final List<ReqSeqBean> list = new ArrayList<ReqSeqBean>(10); getJdbcTemplate().query(sql.toString(), params.toArray(), new RowMapper() { @Override public Object mapRow(ResultSet rs, int rowNum) throws SQLException { ReqSeqBean seq = new ReqSeqBean(); seq.setReqId(rs.getString("REQ_ID")); seq.setReq(rs.getString("SEQ")); seq.setReqXml(lobHandler.getClobAsString(rs, "REQ_XML")); seq.setReqTime(rs.getTimestamp("REQ_TIME")); list.add(seq); return seq; } }); return list; } public LobHandler getLobHandler() { return lobHandler; } public void setLobHandler(LobHandler lobHandler) { this.lobHandler = lobHandler; } }