如何在Java中使用spring jdbctemplate调用PostgreSQL函数而不是直接插入查询？

<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
    <property name="driverClassName" value="org.postgresql.Driver" />
    <property name="url" value="jdbc:postgresql://localhost:5432/mydatabase" />
    <property name="username" value="myuser" />
    <property name="password" value="mypassword" />
</bean>

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="dataSource" />
</bean>

@Autowired
private JdbcTemplate jdbcTemplate;

String functionName = "my_function";
String sql = "SELECT " + functionName + "(?, ?)";
Object[] args = { arg1, arg2 };
String result = jdbcTemplate.queryForObject(sql, args, String.class);

String functionName = "my_function";
String sql = "SELECT * FROM " + functionName + "(?, ?)";
Object[] args = { arg1, arg2 };
List<MyObject> results = jdbcTemplate.query(sql, args, new MyObjectRowMapper());