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  • 增删改查

    package C3p0_Demo;

    import Jdbc_Utils.JDBCUtils;
    import org.junit.Test;
    import org.springframework.jdbc.core.BeanPropertyRowMapper;
    import org.springframework.jdbc.core.JdbcTemplate;


    import java.util.List;
    import java.util.Map;

    public class PingCe {
    //1.创建jdbctemplate对象
    JdbcTemplate jt = new JdbcTemplate(JDBCUtils.getDataSource());

    @Test//修改
    public void xiugai(){

    //2.SQL语句
    String sql = "update emp set salary=10000 where id=?";
    //执行sql语句
    int i = jt.update(sql, 1005);
    System.out.println(i);
    }
    @Test//添加
    public void add(){
    String sql = "insert into emp (id,salary,dept_id) values (?,?,?)";
    int i = jt.update(sql, 999, 8888, 38);
    System.out.println(i);
    }
    @Test//删除
    public void delete(){
    String sql = "delete from emp where id=?";
    int i = jt.update(sql, 999);
    System.out.println(i);
    }
    @Test//查询所有
    public void chaxun(){
    String sql = "select * from emp";
    List<Map<String, Object>> i = jt.queryForList(sql);
    System.out.println(i);

    }
    @Test//查询
    public void cha(){
    String sql = "select * from emp";
    List<Emp> i = jt.query(sql, new BeanPropertyRowMapper<Emp>(Emp.class));
    // System.out.println(i);
    for (Emp emp:i){
    System.out.println(emp);
    }
    }
    @Test//Map
    public void map(){
    String sql = "select * from emp where id=? ";
    Map<String, Object> map = jt.queryForMap(sql, 1001);
    System.out.println(map);
    }
    @Test
    public void zongshu(){
    String sql = "select count(id) from emp";
    Long all = jt.queryForObject(sql, Long.class);
    System.out.println(all);
    }
    }
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  • 原文地址:https://www.cnblogs.com/xuaima/p/10668401.html
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