一天学会JDBC04：ResultSet的用法

package JDBCTest;

import com.sun.org.apache.bcel.internal.generic.Select;
import org.junit.Test;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;

public class JDBCDemo5_ResultSet {
    
    @Test public void testResultSet() throws Exception{
    
        //1.注册驱动
        Class.forName("com.mysql.jdbc.Driver");
        //2.获取连接
        String url="jdbc:mysql:///test?useSSL=false";
        String username="root";
        String password="lyt2529165097";
        Connection conn = DriverManager.getConnection(url,username,password);

        //3.定义sql
        String sql="select * from emp";

        //4.获取statement 对象
        Statement stmt = conn.createStatement();

        //5.执行sql
        ResultSet rs=stmt.executeQuery(sql);

        //创建集合
        List<Account> list=new ArrayList<>();

        //6.处理结果,遍历rs中的所有数据 //6.1 光标向下移动一行,并且判断当前是否有数据 while (rs.next()){
    
            //6.2获取数据 getXxx()
            Account account=new Account();
            int id=rs.getInt("id");
            int workno=rs.getInt("workno");
            String name=rs.getString("name");
            String gender=rs.getString("gender");
            int age=rs.getInt("age");
            int idcard=rs.getInt("idcard");
            String workaddress=rs.getString("workaddress");
            Date entrydate=rs.getDate("entrydate");

            account.setId(id);
            account.setWorkno(workno);
            account.setName(name);
            account.setGender(gender);
            account.setAge(age);
            account.setIdcard(idcard);
            account.setWorkaddress(workaddress);
            account.setEntrydate(entrydate);
            System.out.println("--------");

            list.add(account);

        }
        System.out.println(list);
        //7.释放资源
        rs.close();
        stmt.close();
        conn.close();
    }}

package JDBCTest;

import java.sql.Date;

public class Account {
    
    private int id;
    private int workno;
    private  String name;
    private String gender;

    public int getId() {
    
        return id;
    }

    public void setId(int id) {
    
        this.id = id;
    }

    public int getWorkno() {
    
        return workno;
    }

    public void setWorkno(int workno) {
    
        this.workno = workno;
    }

    public String getName() {
    
        return name;
    }

    public void setName(String name) {
    
        this.name = name;
    }

    public String getGender() {
    
        return gender;
    }

    public void setGender(String gender) {
    
        this.gender = gender;
    }

    public int getAge() {
    
        return age;
    }

    public void setAge(int age) {
    
        this.age = age;
    }

    public int getIdcard() {
    
        return idcard;
    }

    public void setIdcard(int idcard) {
    
        this.idcard = idcard;
    }

    public String getWorkaddress() {
    
        return workaddress;
    }

    public void setWorkaddress(String workaddress) {
    
        this.workaddress = workaddress;
    }

    public Date getEntrydate() {
    
        return entrydate;
    }

    @Override public String toString() {
    
        return "Account{
    " +
                "id=" + id +
                ", workno=" + workno +
                ", name='" + name + '\'' +
                ", gender='" + gender + '\'' +
                ", age=" + age +
                ", idcard=" + idcard +
                ", workaddress='" + workaddress + '\'' +
                ", entrydate=" + entrydate +
                '}';
    }

    public void setEntrydate(Date entrydate) {
    
        this.entrydate = entrydate;
    }

    private int age;
    private int idcard;
    private String workaddress;
    private Date entrydate;

}