Using Java to implement automatic filling of form data and input suggestions

Using Java to implement automatic filling of form data and input suggestions

In recent years, with the development of the Internet, filling in form data has become a part of our daily lives. However, filling in a large amount of form data often causes some trouble for users, especially when entering repeated data. In order to improve the user's filling efficiency and experience, we can use Java language to implement automatic filling of form data and input suggestions. This article will introduce how to use Java to implement this function and provide code examples for reference.

First of all, we need to understand the source of the form data. Generally speaking, form data can be obtained through a database, local file, or network interface. In this article, we take the database as an example, connect the database through JDBC and perform query operations to obtain form data.

The following is a sample code that uses JDBC to connect to the database and perform query operations:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class FormAutoFill {
    public static void main(String[] args) {
        try {
            // 连接数据库
            String url = "jdbc:mysql://localhost:3306/test";
            String username = "root";
            String password = "123456";
            Connection connection = DriverManager.getConnection(url, username, password);
            
            // 执行查询操作
            String sql = "SELECT name FROM user";
            Statement statement = connection.createStatement();
            ResultSet resultSet = statement.executeQuery(sql);
            
            // 打印查询结果
            while (resultSet.next()) {
                String name = resultSet.getString("name");
                System.out.println(name);
            }
            
            // 关闭资源
            resultSet.close();
            statement.close();
            connection.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

In the above code, we first define the connection information of the database, including URL, user name and password. Then, establish a connection to the database by calling the DriverManager.getConnection(url, username, password) method. Next, we performed a query operation and saved the query results in the ResultSet object. Finally, the form data is obtained by traversing the ResultSet object and printed on the console.

After obtaining the form data, we can save the data into a data structure, such as List or Set. By operating on these data structures, we can realize automatic filling of form data and input suggestions. The following is a sample code to implement automatic filling and input suggestions:

import java.util.ArrayList;
import java.util.List;

public class FormAutoComplete {

    private List<String> formData;

    public FormAutoComplete() {
        formData = new ArrayList<>();
    }

    public void addData(String data) {
        formData.add(data);
    }

    public List<String> getAutoCompleteSuggestions(String prefix) {
        List<String> suggestions = new ArrayList<>();
        for (String data : formData) {
            if (data.startsWith(prefix)) {
                suggestions.add(data);
            }
        }
        return suggestions;
    }

    public static void main(String[] args) {
        FormAutoComplete autoComplete = new FormAutoComplete();
        autoComplete.addData("张三");
        autoComplete.addData("李四");
        autoComplete.addData("王五");
        autoComplete.addData("赵六");

        String prefix = "张";
        List<String> suggestions = autoComplete.getAutoCompleteSuggestions(prefix);
        System.out.println("输入建议：");
        for (String suggestion : suggestions) {
            System.out.println(suggestion);
        }
    }
}

In the above code, we first define a FormAutoComplete class, which encapsulates the form data and some operation methods. In the FormAutoComplete class, we use List to save form data and provide the addData method for adding data to the data structure. At the same time, we implemented the getAutoCompleteSuggestions method, which returns all input suggestions matching the prefix entered by the user. Finally, in the main method, we create a FormAutoComplete object and add some form data. We then define a prefix and call the getAutoCompleteSuggestions method to get all input suggestions matching it and print the results on the console.

Using Java language to implement automatic filling of form data and input suggestions can greatly improve the efficiency and experience of users filling out forms. By properly designing data structures and algorithms, we can achieve more intelligent and flexible input suggestion functions. I hope the code examples in this article can help readers in practice.

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