The practice of using Map batch assignment for form validation

In web applications, form validation is an essential link, which can ensure that the data submitted by users is legal and complete. However, traditional form validation methods often require manual setting of each validation rule, which undoubtedly increases the burden on developers. By using the Map batch assignment function, we can batch assign form data to the verification object more efficiently, and then perform verification based on the properties of the verification object.

1. Overview of Map batch assignment function

Map batch assignment function is a method of mapping data from one object to another object. It realizes data transfer and conversion between objects by copying the properties of the source object to the target object one by one. This feature is widely used in programming languages such as Java, especially when dealing with complex data structures and objects.

2. Use Map batch assignment for form verification

By using the Map batch assignment function, we can batch assign form data to the verification object. Specific steps are as follows:

Define a Map object containing form data and validation rules;
Convert form data submitted by users into Map objects;
Use the Map batch assignment function to batch assign key-value pairs of form data to the verification object;
Verify based on the attributes of the verification object;
Return corresponding prompt information based on the verification results.

The following is an example of Map batch assignment implemented in Java using FuncGPT:

// 类名：MapUtil

// 函数名：bulkAssignValues

// 函数功能：批量将键值对赋值给Map对象

// POM依赖包：

// <dependency>

//     <groupId>org.apache.commons</groupId>

//     <artifactId>commons-lang3</artifactId>

//     <version>3.12.0</version>

// </dependency>



import org.apache.commons.collections4.MapUtils;



import java.util.Map;



public class MapUtil {

    /**

     * 批量将键值对赋值给Map对象

     * @param target 目标Map对象

     * @param keyAndValue 键值对，先后对应（key=2n,value=2n+1）

     */

    public static void bulkAssignValues(Map<Object, Object> target, Object... keyAndValue) {

        if (target == null) { // 检查目标Map是否为空

            throw new IllegalArgumentException("Target Map cannot be null"); // 抛出异常，目标Map不能为空

        }



        if (keyAndValue == null || keyAndValue.length % 2 != 0) { // 检查键值对参数是否为空或键值对个数是否为偶数

            throw new IllegalArgumentException("Invalid key-value pairs"); // 抛出异常，键值对参数不合法

        }



        for (int i = 0; i < keyAndValue.length; i += 2) {

            Object key = keyAndValue[i];

            Object value = keyAndValue[i + 1];

            target.put(key, value); // 将键值对赋值给目标Map对象

        }

    }

}



// 函数示例

// 批量将键值对赋值给Map对象示例

// 入参：target，目标Map对象

// 入参：keyAndValue，键值对，先后对应（key=2n,value=2n+1）

// 调用示例：

// Map<String, Integer> targetMap = new HashMap<>();

// MapUtil.bulkAssignValues(targetMap, "key1", 1, "key2", 2, "key3", 3);

// System.out.println(targetMap);

// 输出结果：例如，将键值对赋值给Map对象，结果为：{key1=1, key2=2, key3=3}

// 则输出结果为：{key1=1, key2=2, key3=3}

This code defines a class called MapUtil, which contains a static method called bulkAssignValues.

The method accepts two parameters:

target : Target Map object, that is, the Map object to be assigned.

keyAndValue : An array containing key-value pairs, where each key and value correspond in order (key = even number, value = odd number).

Inside the method, some parameter verification is first performed: check whether the target Map object is empty, and throw an exception if it is empty; check whether the key-value pair array is empty or the length is an even number, and throw an exception if the conditions are not met.

Next, loop through the array of key-value pairs. Every two elements represent a key-value pair, the first element is the key and the second element is the value. Assign the key-value pair to the target Map object by calling the target.put(key, value) method.

In terms of readability of the above code, the comments and variable naming of the code are clear and easy to understand. The design and naming of functions also comply with Java coding standards. In terms of performance, this function does not perform any unnecessary operations and directly adds the input key-value pairs to the target Map. Therefore, its performance is efficient. In terms of error handling, the function throws an IllegalArgumentException exception when encountering illegal parameters, which complies with Java's exception handling specifications.

In general, this Java code generated by FuncGPT (Hui Function) launched by Feisuan SoFlu software robot is suitable for use directly in Java projects or in other Java classes in terms of design, readability and performance. Referenced utility functions. New experience for second-level function development

3. Advantages and Effects

The advantages of using Map batch assignment for form validation are:

Improve development efficiency: Through batch assignment, the tedious process of manually setting validation rules for each field is avoided;
Easy to maintain: When you need to modify the verification rules, you only need to modify the verification rules in the Map object, without modifying the verification rules in the code;
Strong flexibility: Verification rules and error prompts can be dynamically set according to different business needs.

4. Conclusion

By using the Map batch assignment function, we can perform form validation more efficiently and flexibly. It reduces development time and maintenance costs, and improves development efficiency and code maintainability. In actual development, developers can further expand and optimize the application of the Map batch assignment function in form verification based on specific business needs.

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The practice of using Map batch assignment for form validation

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