Spring如何使用JdbcTemplate调用存储过程的三种情况

时间:2022-01-21 06:09:53

Spring的SimpleJdbcTemplate将存储过程的调用进行了良好的封装,下面列出使用JdbcTemplate调用Oracle存储过程的三种情况:
一、无返回值的存储过程调用

1、存储过程代码:
create or replace procedure sp_insert_table(param1 in varchar2,param2 in varchar2) as
begin
insert into table MyTable (id,name) values ('param1 ','param2');
end sp_insert_table;

2、JdbcTemplate调用该存储过程代码:

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 sp_insert_table('100001')");
}
}

二、有返回值的存储过程(非结果集)
1、存储过程代码:

 create or replace procedure sp_select_table (param1 in varchar2,param2 out varchar2) as 
begin select into param2 from MyTable where ID = param1 ;

end sp_insert_table ;

2、JdbcTemplate调用该存储过程代码:

public void test() {   
String param2Value = (String) jdbcTemplate.execute(
new CallableStatementCreator() {
public CallableStatement createCallableStatement(Connection con) throws SQLException {
String storedProc = "{call sp_select_table (?,?)}";// 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
}
});
}

三、有返回值的存储过程(结果集)

1、存储过程代码:先创建程序包,因为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package:

 create or replace package mypackage as 
type my_cursor is ref cursor;

end mypackage;

2、存储过程代码:可以看到,列表是通过把游标作为一个out参数来返回的。

create or replace procedure sp_list_table(param1 in varchar2,param2 out mypackage.my_cursor) is 
begin
open my_cursor for select * from myTable;

end sp_list_table;

3、JdbcTemplate调用该存储过程代码:

 public void test() {   
List resultList = (List) jdbcTemplate.execute(
new CallableStatementCreator() {
public CallableStatement createCallableStatement(Connection con) throws SQLException {
String storedProc = "{call sp_list_table(?,?)}";// 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);
}
}