jdbc手动连接数据库查询数据实例

public class User {
   public User(){

   }
   public User(int id,String name,int age,String sex,String tel,String addr){
       this.id = id;
       this.name = name;
       this.age = age;
       this.sex = sex;
       this.tel = tel;
       this.addr = addr;
   }
   private int id;
   private String name;
   private int age;
   private String sex;
   private String tel;
   private String addr;
   public int getId() {
       return id;
   }
   public void setId(int id) {
       this.id = id;
   }
   public String getName() {
       return name;
   }
   public void setName(String name) {
       this.name = name;
   }
   public int getAge() {
       return age;
   }
   public void setAge(int age) {
       this.age = age;
   }
   public String getSex() {
       return sex;
   }
   public void setSex(String sex) {
       this.sex = sex;
   }
   public String getTel() {
       return tel;
   }
   public void setTel(String tel) {
       this.tel = tel;
   }
   public String getAddr() {
       return addr;
   }
   public void setAddr(String addr) {
       this.addr = addr;
   }

}

public static List<User> query() {
       String url = "jdbc:mysql://localhost:3306/test?characterEncoding=utf-8";
       String user = "root";
       String password = "123456";

       Connection conn = null;
       PreparedStatement ps = null;
       ResultSet rs = null;
       List<User> list = new ArrayList<User>();
       try { //1.加载驱动程序
           Class.forName("com.mysql.jdbc.Driver"); //com.mysql.jdbc.Driver
           //2.获得数据库链接
           conn = DriverManager.getConnection(url, user, password);
           String sql = "select * from t_user";
           //3.通过数据库的连接操作数据库，实现增删改查
           ps = conn.prepareStatement(sql);
           rs = ps.executeQuery();

　　//插入数据

　　//String sql = "insert into t_user(id,username,password) values(2,'张三','123'),(10,'李四','123456');";

　　//statement.executeUpdate(sql);

           while(rs.next()){
               User user2 = new User(rs.getInt("id"),rs.getString("name"),rs.getInt("age"),rs.getString("sex"),rs.getString("tel"),rs.getString("addr"));
               list.add(user2);
               }
           } catch (Exception e) {
           e.printStackTrace();
           }finally{
               try {
                   ps.close();
                   rs.close();
                   conn.close();
               } catch (Exception e) {
               e.printStackTrace();
               }
               }
       return list;
       }

public static void main(String[] args) {
       List userList=query();
       for(int i=0;i<userList.size();i++){
           User user=(User) userList.get(i);
           System.out.println(user.getId()+user.getName()+user.getAge()+user.getSex()+user.getAddr());
       }
       //System.out.println(users);

   }

用到的mysql版本：

<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.34</version>
</dependency>

包过的错：

CLIENT_PLUGIN_AUTH is required ：因为mysql版本问题

jdbc手动连接数据库查询数据实例

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