[JSP] 11. Servlet을 사용하여 JSON 파싱하기

[JSP] 11. Servlet을 사용하여 JSON 파싱하기

 

 

package com.tenco;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;


public class TodoServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       

    public TodoServlet() {
        super();
    }


    // get 요청시 동작
    // 주소 설계 : http://localhost:8080/d4/todo-servlet
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		System.out.println("GET 요청 확인");
		response.setContentType("text/plain");
		String strJson=" {\r\n"
				+ "    \"userId\": 1,\r\n"
				+ "    \"id\": 1,\r\n"
				+ "    \"title\": \"delectus aut autem\",\r\n"
				+ "    \"completed\": false\r\n"
				+ "  }";
		PrintWriter pw=response.getWriter();
		pw.print(strJson);
	}

	
	// post 요청시 동작
    // 주소 설계 : http://localhost:8080/d4/todo-servlet
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

}

 

package com.tenco;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;


public class TodoServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       

    public TodoServlet() {
        super();
    }


    // get 요청시 동작
    // 주소 설계 : http://localhost:8080/d4/todo-servlet
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		System.out.println("GET 요청 확인");
		
		Todo todo1=new Todo();
		todo1.setId(100);
		todo1.setTitle("오늘은 JSON 리턴하기 연습");
		todo1.setCompleted(false);
		
		response.setContentType("text/plain");
//		String strJson=" {\r\n"
//				+ "    \"userId\": 1,\r\n"
//				+ "    \"id\": 1,\r\n"
//				+ "    \"title\": \"delectus aut autem\",\r\n"
//				+ "    \"completed\": false\r\n"
//				+ "  }";
		PrintWriter pw=response.getWriter();
		pw.print(todo1.toString());
	}

	
	// post 요청시 동작
    // 주소 설계 : http://localhost:8080/d4/todo-servlet
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

}

package com.tenco;

import lombok.Getter;
import lombok.Setter;
import lombok.ToString;

@Getter
@Setter
@ToString
public class Todo {
	
	
	
	public void setId(int id) {
		this.id = id;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public void setCompleted(boolean completed) {
		this.completed = completed;
	}
	private int id;
	private String title;
	private boolean completed;

}

 

 

package com.tenco;

import jakarta.servlet.ServletException;
import jakarta.servlet.annotation.WebServlet;
import jakarta.servlet.http.HttpServlet;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;


public class TodoServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       

    public TodoServlet() {
        super();
    }


    // get 요청시 동작
    // 주소 설계 : http://localhost:8080/d4/todo-servlet
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		System.out.println("GET 요청 확인");
		
		Todo todo1=new Todo();
		todo1.setId(100);
		todo1.setTitle("오늘은 JSON 리턴하기 연습");
		todo1.setCompleted(false);
		
		response.setContentType("text/plain");
//		String strJson=" {\r\n"
//				+ "    \"userId\": 1,\r\n"
//				+ "    \"id\": 1,\r\n"
//				+ "    \"title\": \"delectus aut autem\",\r\n"
//				+ "    \"completed\": false\r\n"
//				+ "  }";
		PrintWriter pw=response.getWriter();
		pw.print(todo1.toString());
	}

	
	// post 요청시 동작
    // 주소 설계 : http://localhost:8080/d4/todo-servlet
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

}

package com.tenco;

import lombok.Getter;
import lombok.Setter;
import lombok.ToString;

@Getter
@Setter
public class Todo {
	
	@Override
	public String toString() {
		return "{ \"id\" : "+id+" }";
	}
	
	public void setId(int id) {
		this.id = id;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	public void setCompleted(boolean completed) {
		this.completed = completed;
	}
	private int id;
	private String title;
	private boolean completed;

}