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jspblog : ajax test - json

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kim
2021-01-20 17:19:02 +09:00
parent 163bedea4d
commit 5ff651a35d
2 changed files with 104 additions and 0 deletions
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65
jspblog/src/main/java/com/example/jspblog/test/Ajax2.java Normal file
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package com.example.jspblog.test;
import com.google.gson.Gson;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
@WebServlet("/ajax2")
public class Ajax2 extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
BufferedReader br = request.getReader();
String data = br.readLine();
System.out.println("data : " + data);
Gson gson = new Gson();
// gson.fromJson() : json -> java object
// gson.toJson() : java object -> json
TestDto dto = gson.fromJson(data, TestDto.class);
System.out.println("dto : " + dto);
String userJson = gson.toJson(dto);
System.out.println("userJson : " + userJson);
PrintWriter out = response.getWriter();
out.print(userJson);
out.flush();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
}
class TestDto {
private String username;
private String password;
@Override
public String toString() {
return "TestDto{" +
"username='" + username + '\'' +
", password='" + password + '\'' +
'}';
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}

39
jspblog/src/main/webapp/test/jsonajax.jsp Normal file
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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
<script
src="https://code.jquery.com/jquery-3.5.1.js"
integrity="sha256-QWo7LDvxbWT2tbbQ97B53yJnYU3WhH/C8ycbRAkjPDc="
crossorigin="anonymous"></script>
</head>
<body>
<button onclick="jsonAjax()">클릭</button>
<script>
let data = {
username: "kim",
password: "1234"
}
// JSON.stringify() : js object -> json
// JSON.parse() : json -> js object
function jsonAjax() {
$.ajax({
type: "POST",
url: "http://localhost:8080/jspblog/ajax2",
data: JSON.stringify(data),
contentType: "application/json",
dataType: "json"
})
.done(function (result){
console.log(result);
console.log(result.username);
})
.fail(function (error) {
});
}
</script>
</body>
</html>