写出根据学号，姓名使用vue实现按钮查询功能的前端代码，需要联动后端数据库，并且使用java语言写出后端代码

前端代码：

<template>
  <div>
    <label>
      学号：
      <input type="text" v-model="id" />
    </label>
    <label>
      姓名：
      <input type="text" v-model="name" />
    </label>
    <button @click="search">查询</button>
    <div v-if="result">{{ result }}</div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      id: '',
      name: '',
      result: '',
    };
  },
  methods: {
    search() {
      // 根据学号和姓名查询后端接口
      fetch(`/api/search?id=${this.id}&name=${this.name}`)
        .then((res) => res.json())
        .then((data) => {
          this.result = data.result;
        });
    },
  },
};
</script>

后端代码：

import java.sql.*;

import com.sun.net.httpserver.HttpServer;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;

public class Server {
  private static final String JDBC_URL = "jdbc:mysql://localhost:3306/test?useSSL=false&serverTimezone=UTC";
  private static final String JDBC_USERNAME = "root";
  private static final String JDBC_PASSWORD = "root";

  public static void main(String[] args) throws Exception {
    HttpServer server = HttpServer.create(new InetSocketAddress(8000), 0);
    server.createContext("/api/search", new SearchHandler());
    server.setExecutor(null);
    server.start();
  }

  static class SearchHandler implements HttpHandler {
    @Override
    public void handle(HttpExchange exchange) throws IOException {
      String query = exchange.getRequestURI().getQuery();
      String[] params = query.split("&");
      String id = null;
      String name = null;
      for (String param : params) {
        String[] pair = param.split("=");
        if (pair[0].equals("id")) {
          id = pair[1];
        } else if (pair[0].equals("name")) {
          name = pair[1];
        }
      }
      String result = null;
      try (Connection conn = DriverManager.getConnection(JDBC_URL, JDBC_USERNAME, JDBC_PASSWORD)) {
        String sql = "SELECT * FROM students WHERE id=? AND name=?";
        try (PreparedStatement stmt = conn.prepareStatement(sql)) {
          stmt.setString(1, id);
          stmt.setString(2, name);
          try (ResultSet rs = stmt.executeQuery()) {
            if (rs.next()) {
              result = "查询成功";
            } else {
              result = "查询失败";
            }
          }
        }
      } catch (SQLException e) {
        e.printStackTrace();
        result = "查询出错";
      }
      String response = "{\"result\": \"" + result + "\"}";
      exchange.sendResponseHeaders(200, response.length());
      OutputStream os = exchange.getResponseBody();
      os.write(response.getBytes());
      os.close();
    }
  }
}

需要注意的是，这里使用了MySQL数据库，需要提前安装MySQL并创建名为`test`的数据库，以及名为`students`的表并插入一些数据。如果使用其他类型的数据库，需要根据实际情况修改JDBC连接URL和用户名密码等参数。