使用Spring的JdbcTemplate调用Oracle的存储过程
Spring的SimpleJdbcTemplate将存储过程的调用进行了良好的封装,但可惜只能用于jdk1.5的环境,无法再jdk1.4环境下使用,而JdbcTemplate则完全适用于jdk1.4下的环境,下面列出使用JdbcTemplate调用Oracle存储过程的一些方法:
一) 无返回值的存储过程调用
存储过程:
CREATE OR REPLACE PROCEDURE TESTPRO(PARAM1 IN VARCHAR2,PARAM2 IN VARCHAR2) AS
BEGIN
INSERT INTO TESTTABLE (ID,NAME) VALUES (PARAM1, PARAM2);
END TESTPRO;
Java代码:
package com.dragon.test;
import org.springframework.jdbc.core.JdbcTemplate;
public class JdbcTemplateTest {
private JdbcTemplate jdbcTemplate;
public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
this.jdbcTemplate = jdbcTemplate;
}
public void test(){
this.jdbcTemplate.execute("call testpro('p1','p2')");
}
}
注:存储过程TESTPRO中用到了表TESTTABLE(ID, NAME),需事先建好.
二)有返回值的存储过程(非结果集)
存储过程:
CREATE OR REPLACE PROCEDURE TESTPRO(PARAM1 IN VARCHAR2,PARAM2 OUT VARCHAR2) AS
BEGIN
SELECT INTO PARAM2 FROM TESTTABLE WHERE ID= PARAM1;
END TESTPRO;
Java代码:
public void test() {
String param2Value = (String) jdbcTemplate.execute(
new CallableStatementCreator() {
public CallableStatement createCallableStatement(Connection con) throws SQLException {
String storedProc = "{call testpro(?,?)}";// 调用的sql
CallableStatement cs = con.prepareCall(storedProc);
cs.setString(1, "p1");// 设置输入参数的值
cs.registerOutParameter(2, OracleTypes.VARCHAR);// 注册输出参数的类型
return cs;
}
}, new CallableStatementCallback() {
public Object doInCallableStatement(CallableStatement cs) throws SQLException, DataAccessException {
cs.execute();
return cs.getString(2);// 获取输出参数的值
}
});
}
注:cs.getString(2)中的数值2是存储过程中的out列对应的索引值(第一个参数索引为1,如此类推)
三)有返回值的存储过程(结果集)
因oracle存储过程所有返回值都是通过out参数返回的,列表同样也不例外,但由于是集合,所以不能用一般的参数,必须要用pagkage,分两部分:
1.建一个程序包,如下:
CREATE OR REPLACE PACKAGE TESTPACKAGE AS
TYPE TEST_CURSOR IS REF CURSOR;
END TESTPACKAGE;
2.建立存储过程,如下:
CREATE OR REPLACE PROCEDURE TESTPRO(PARAM1 IN VARCHAR2,test_cursor out TESTPACKAGE.TEST_CURSOR) IS
BEGIN
OPEN test_cursor FOR SELECT * FROM TESTTABLE;
END TESTPRO;
可以看到,列表是通过把游标作为一个out参数来返回的。
Java代码:
public void test() {
List resultList = (List) jdbcTemplate.execute(
new CallableStatementCreator() {
public CallableStatement createCallableStatement(Connection con) throws SQLException {
String storedProc = "{call testpro(?,?)}";// 调用的sql
CallableStatement cs = con.prepareCall(storedProc);
cs.setString(1, "p1");// 设置输入参数的值
cs.registerOutParameter(2, OracleTypes.CURSOR);// 注册输出参数的类型
return cs;
}
}, new CallableStatementCallback() {
public Object doInCallableStatement(CallableStatement cs) throws SQLException,DataAccessException {
List resultsMap = new ArrayList();
cs.execute();
ResultSet rs = (ResultSet) cs.getObject(2);// 获取游标一行的值
while (rs.next()) {// 转换每行的返回值到Map中
Map rowMap = new HashMap();
rowMap.put("id", rs.getString("id"));
rowMap.put("name", rs.getString("name"));
resultsMap.add(rowMap);
}
rs.close();
return resultsMap;
}
});
for (int i = 0; i < resultList.size(); i++) {
Map rowMap = (Map) resultList.get(i);
String id = rowMap.get("id").toString();
String name = rowMap.get("name").toString();
System.out.println("id=" + id + ";name=" + name);
}
}
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