我编写了一个 server.py 文件，可以保存学生的姓名、索引号和平均成绩。当我运行client.html文件并输入数据并单击添加学生时，它说学生已成功添加，但是当我输入他的索引以使用获取学生功能时，它说404学生未找到。
这是server.py文件代码：
from flask import Flask, request, jsonify
import pickle
app = Flask(__name__)
try:
with open('students.pickle', 'rb') as f:
students = pickle.load(f)
except FileNotFoundError:
students = {}
@app.route("/")
def index():
with open("client.html") as f:
return f.read()
@app.route('/add_student', methods=['POST'])
def add_student():
name = request.form.get('name')
surname = request.form.get('surname')
index = request.form.get('index')
grade = request.form.get('grade')
students[index] = {'name': name, 'surname': surname, 'index': index,'grade': grade}
with open('students.pickle', 'wb') as f:
pickle.dump(students, f)
return jsonify(message='Student added successfully'), 201
@app.route('/get_student/<int:index>', methods=['GET'])
def get_student(index):
student = students.get(index)
if student:
return jsonify(student)
else:
return 'Student not found', 404
if __name__ == '__main__':
app.run(host='localhost', port=8000, debug=True)
这是 client.html 文件代码：
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script>
$(document).ready(function() {
function getStudent() {
var index = $("#index").val();
$.ajax({
type: "GET",
url: "http://localhost:8000/get_student/" + index,
success: function(data) {
$("#student-info").text(JSON.stringify(data));
},
error: function() {
$("#student-info").text("Student not found");
}
});
}
function addStudent() {
var data = new FormData();
data.append("name", $("#name").val());
data.append("surname", $("#surname").val());
data.append("index", $("#index").val());
data.append("grade", $("#grade").val());
$.ajax({
type: "POST",
url: "http://localhost:8000/add_student",
data: data,
processData: false,
contentType: false,
success: function(data) {
$("#add-student-result").text("Student added");
},
error: function() {
$("#add-student-result").text("Error adding student");
}
});
}
$("#get-student-form").submit(function(e) {
e.preventDefault();
getStudent();
});
$("#add-student-form").submit(function(e) {
e.preventDefault();
addStudent();
});
});
</script>
</head>
<body>
<form id="get-student-form">
<label for="index">Index:</label>
<input type="text" id="index" name="index">
<button type="submit">Get Student</button>
</form>
<div id="student-info"></div>
<br>
<form id="add-student-form">
<label for="name">Name:</label>
<input type="text" id="name" name="name">
<br>
<label for="surname">Surname:</label>
<input type="text" id="surname" name="surname">
<br>
<label for="index">Index:</label>
<input type="text" id="index" name="index">
<br>
<label for="grade">Grade:</label>
<input type="text" id="grade" name="grade">
<br>
<button type="submit">Add Student</button>
</form>
<div id="add-student-result"></div>
</body>
</html>
在 html 页面中，您为两个元素指定了相同的 id（索引设置框和获取框），因此代码仅查找第一个元素，因此字典中的索引将等于“ " 并且代码找不到它。
编辑：另一个错误是索引必须是字符串，在get函数中必须是字符串。 [只需执行index = str(index)]
希望有帮助。