spring的事务如何判断是否执行成功了还是回滚了

import org.apache.tomcat.jdbc.pool.DataSource;//import org.springframework.jdbc.datasource.DriverManagerDataSource;import org.springframework.jdbc.core.JdbcTemplate;public class Transaction {    private DataSource ds;    public DataSource getDs() {        return ds;    }    public void setDs(DataSource ds) {        this.ds = ds;    }    public void insert(String sql){//        System.out.println(sql);        JdbcTemplate jt = new JdbcTemplate(ds);        jt.execute(sql);    }}