spring 中StoredProcedure的用法--转载

StoredProcedure是一个抽象类,必须写一个子类来继承它,这个类是用来简化JDBCTemplate执行存储过程操作的。

首先我们写一个实现类:

package com.huaye.framework.dao;

import java.sql.Types;
import java.util.HashMap;
import java.util.Map; import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.SqlOutParameter;
import org.springframework.jdbc.core.SqlParameter;
import org.springframework.jdbc.core.SqlReturnResultSet;
import org.springframework.jdbc.object.StoredProcedure; /**
* Name:StoredProcedureTemplate User: HP Date: 2007-7-21 Time: 7:40:01
* Description:
*/
public class StoredProcedureTemplate extends StoredProcedure { private HashMap<String, Object> map = new HashMap<String, Object>(); public StoredProcedureTemplate() {
super(); } public HashMap getMap()
{
return this.map;
} public void setValue(String key, Object obj) {
map.put(key, obj);
} public Map execute() {
if (this.getSql() == null || this.getSql().equals(""))
return null;
this.compile();
return execute(map);
} public void setVarcharParam(String param) {
this.declareParameter(new SqlParameter(param, Types.VARCHAR));
} public void setDoubleParam(String param) {
this.declareParameter(new SqlParameter(param, Types.DOUBLE));
} public void setIntegerParam(String param) {
this.declareParameter(new SqlParameter(param, Types.INTEGER));
} public void setVarcharOutParam(String param) {
this.declareParameter(new SqlOutParameter(param, Types.VARCHAR));
} public void setDoubleOutParam(String param) {
this.declareParameter(new SqlOutParameter(param, Types.DOUBLE));
} public void setIntegerOutParam(String param) {
this.declareParameter(new SqlOutParameter(param, Types.INTEGER));
} public void setInParam(String param,int valueType)
{
this.declareParameter(new SqlParameter(param, valueType)); } public void setOutParam(String param,int valueType)
{
this.declareParameter(new SqlOutParameter(param, valueType)); } public void setReturnParam(String param, RowMapper rowMapper) {
this.declareParameter(new SqlReturnResultSet(param,rowMapper));
} }

写一个测试:

public void test2() {
ApplicationContext context = new ClassPathXmlApplicationContext(
"classpath:spring/applicationContext-base.xml");
JdbcTemplate jdbc = (JdbcTemplate) context.getBean("jdbcTemplate"); StoredProcedureTemplate template = new StoredProcedureTemplate(); template.setJdbcTemplate(jdbc);
template.setSql("testproc");
//注意有返回结果集的时候,第一个参数必须设置为返回结果集参数,不然会报错。
template.setReturnParam("rows", new FirstReportRowMapper()); template.setIntegerParam("@parama"); template.setValue("@parama", 9); Map map = template.execute();
Object o = map.get("rows");
List<FirstReportVO> list = (List<FirstReportVO>)o;
for (FirstReportVO vo : list) {
System.out.println(vo.getSortID()+","+vo.getSortName());
}
}

唯一要注意的地方就是测试里备注的地方,我测试了好久才发现,郁闷的一塌糊涂,老是莫名其妙的错,原来将参数互换一下位置就OK了,比如你把

template.setIntegerParam("@parama");写在前面然后再写template.setReturnParam("rows", new FirstReportRowMapper());的话,就会报空指针错误。

这个“rows”可以随便取名字,不过下面map.get("rows")要和你取的名字一致,因为StoredProcedureTemplate会将结果集以这个名字保存在map中返回。

还有要注意的就是设置sqlparamter的顺序要和存储过程中参数的顺序要一致,不然也会报错.

原文:http://blog.csdn.net/xiao_jun_0820/article/details/7268219

http://forum.spring.io/forum/spring-projects/data/13984-multiple-calls-to-storedprocedure-using-same-connection

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