회원가입

<AndroidTest.java>

package com;


import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


@WebServlet("/AndroidTest")
public class AndroidTest extends HttpServlet {
	protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	
		
		System.out.println("서버 요청 들어옴!");
		
		String data = request.getParameter("data");
		
		System.out.println("요청된 값 : " + data);
		
		response.setContentType("text/plain; charset=utf-8");
		
		PrintWriter out = response.getWriter();
		
		out.print("{\"result\":\"결과확인\"}");
		
	}

}

<joinController.java>

package com;


import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


@WebServlet("/JoinController")
public class JoinController extends HttpServlet {
	protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		System.out.println("회원가입 요청!");
		
		String id = request.getParameter("join_id");
		String pw = request.getParameter("join_pw");
		String nick = request.getParameter("join_nick");
		
		System.out.println(id+" / " + pw +" / " + nick);
		
		MemberDAO dao = new MemberDAO();
		int cnt = dao.join(new MemberVO(id, pw, nick));
		
		PrintWriter out = response.getWriter();
		
		if(cnt == 1) { // 회원가입 성공
			out.print("1");
		}else { // 회원가입 실패
			out.print("0");
		}
	}

}

<MemberDAO.java>

package com;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class MemberDAO {
	
	Connection conn;
	PreparedStatement psmt;
	ResultSet rs;
	
	int cnt = 0;
	
	public void getCon() {

	      try {
	         Class.forName("oracle.jdbc.driver.OracleDriver");  

	         String url = "jdbc:oracle:thin:@localhost:1521:xe";
	         String user = "hr";
	         String pw2 = "hr";

	         conn = DriverManager.getConnection(url, user, pw2);

	      } catch (Exception e) {
	         e.printStackTrace();
	      }

	   }
	
		public void close() {

	      try {
	         if (rs != null) {
	            rs.close();
	         }
	         if (psmt != null) {
	            psmt.close();
	         }
	         if (conn != null) {
	            conn.close();
	         }

	      } catch (Exception e) {
	         e.printStackTrace();
	      }

	   }
		
		// 회원가입을 위한 메소드
		public int join(MemberVO vo) {
			
			getCon();
			
			String sql = "insert into memberinfo values(?,?,?)";
			
			try {
				psmt = conn.prepareStatement(sql);
				psmt.setString(1, vo.getId());
				psmt.setString(2, vo.getPw());
				psmt.setString(3, vo.getNick());
				
				cnt = psmt.executeUpdate();
				
			} catch (SQLException e) {
				e.printStackTrace();
			}
			finally {
				close();
			}
			return cnt;
		}
}

<MemberVO.java>

package com;

public class MemberVO {
	
	private String id;
	private String pw;
	private String nick;
	
	public MemberVO(String id, String pw, String nick) {
		this.id = id;
		this.pw = pw;
		this.nick = nick;
	}

	public String getId() {
		return id;
	}

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

	public String getPw() {
		return pw;
	}

	public void setPw(String pw) {
		this.pw = pw;
	}

	public String getNick() {
		return nick;
	}

	public void setNick(String nick) {
		this.nick = nick;
	}
	
	

}

<Android-JoinActivity>

package com.example.ex_0718;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import java.util.HashMap;
import java.util.Map;

public class JoinActivity extends AppCompatActivity {

    EditText txt_id2, txt_nick, txt_pw2;
    Button btn_add;

    RequestQueue requestQueue;
    StringRequest request;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_join);

        txt_id2 = findViewById(R.id.txt_id2);
        txt_nick = findViewById(R.id.txt_nick);
        txt_pw2 = findViewById(R.id.txt_pw2);
        btn_add = findViewById(R.id.btn_add);

        requestQueue = Volley.newRequestQueue(getApplicationContext());

        btn_add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                String id = txt_id2.getText().toString();
                String nick = txt_nick.getText().toString();
                String pw = txt_pw2.getText().toString();

                request = new StringRequest(
                        Request.Method.POST,
                        "http://172.30.1.33:8081/AndroidServer/JoinController",
                        new Response.Listener<String>() {
                            @Override
                            public void onResponse(String response) {
                                // 가입의 성공 여부를 따라 Toast 메시지 띄우기
                                if(response.equals("1")){
                                    Toast.makeText(getApplicationContext(),"회원가입 성공", Toast.LENGTH_SHORT).show();

                                    Intent intent = new Intent(getApplicationContext(), LoginActivity.class);
                                    startActivity(intent); // 단방향
                                    finish();

                                }else{
                                    Toast.makeText(getApplicationContext(),"회원가입 실패", Toast.LENGTH_SHORT).show();
                                }
                            }
                        },
                        new Response.ErrorListener() {
                            @Override
                            public void onErrorResponse(VolleyError error) {

                            }
                        }
                ){
                    @Nullable
                    @Override
                    protected Map<String, String> getParams() throws AuthFailureError {

                        Map<String,String> params = new HashMap<>();

                        params.put("join_id", id);
                        params.put("join_nick", nick);
                        params.put("join_pw", pw);

                        return params;
                    }
                };

                requestQueue.add(request);
            }
        });

    }
}

<Android - LoginActivity>

package com.example.ex_0718;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

public class LoginActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
    }
}