faker 伪造数据生成库

前言

javafaker，这是一个用于生成假数据的 Java 库，与 Python 的 faker 库类似。javafaker 库提供了很多方法，用于生成各种类型的随机数据，

基本用法

api介绍

 <!--java faker用于生成随机数据--><dependency><groupId>com.github.javafaker</groupId><artifactId>javafaker</artifactId><version>1.0.2</version></dependency>

我们常用语种

Locale.CHINA //简体中文
Locale.ENGLISH //en
Locale.FRENCH //法语
Locale.GERMAN //德语
Locale.ITALIAN //意大利语
Locale.JAPANESE //日语

常用随机值

姓名、地址、电子邮件、电话号码、商业数据、日期、颜色等

展示代码

 Faker faker = new Faker();// 生成名字String firstName = faker.name().firstName();String lastName = faker.name().lastName();String fullName = faker.name().fullName();// 生成地址String streetName = faker.address().streetName();String city = faker.address().city();String zipCode = faker.address().zipCode();// 生成电子邮件String email = faker.internet().emailAddress();// 生成电话号码String phoneNumber = faker.phoneNumber().phoneNumber();// 生成商业数据String companyName = faker.company().name();String bs = faker.company().bs();// 生成日期String pastDate = faker.date().past(5, TimeUnit.HOURS).toLocaleString(); // 5小时前的日期String futureDate = faker.date().future(1, TimeUnit.HOURS).toLocaleString(); // 1 小时后的日期// 生成颜色String hexColor = faker.color().hex();// 生成随机数和布尔值int randomInt = faker.number().randomDigit();boolean randomBoolean = faker.bool().bool();// 打印结果System.out.println("First Name: " + firstName);System.out.println("Last Name: " + lastName);System.out.println("Full Name: " + fullName);System.out.println("Street Name: " + streetName);System.out.println("City: " + city);System.out.println("Zip Code: " + zipCode);System.out.println("Email: " + email);System.out.println("Phone Number: " + phoneNumber);System.out.println("Company Name: " + companyName);System.out.println("Company BS: " + bs);System.out.println("Past Date: " + pastDate);System.out.println("Future Date: " + futureDate);System.out.println("Hex Color: " + hexColor);System.out.println("Random Int: " + randomInt);System.out.println("Random Boolean: " + randomBoolean);

假设有一个用户实体类

package com.jerry.rpccore.model;import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.ToString;/*** @version 1.0* @Author jerryLau* @Date 2024/4/12 16:41* @注释*/
@Data
@Builder
@AllArgsConstructor
@ToString
public class User {private int id;private String name;private int age;private String address;private String phone;}

随机生成后，保存至数据库或者存在csv文件

package com.jerry.rpccore;import com.github.javafaker.Faker;
import com.jerry.rpccore.model.User;import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;/*** @version 1.0* @Author jerryLau* @Date 2024/4/11 16:38* @注释*/
public class TestMain {public static void main(String[] args) {List<User> users = new ArrayList<>();Faker instance = Faker.instance(Locale.CHINA);for (int i = 0; i < 10; i++) {User build = User.builder().id(i).name(instance.name().fullName()).age(instance.number().randomDigitNotZero()).address(instance.address().city() + instance.address().streetName() + instance.address().streetAddress()).phone(instance.phoneNumber().cellPhone()).build();System.out.println(build);//插入数据库//....userservice.save(build);users.add(build);}//写入文件saveUsersToFile(users);}/**** 写入csv文件* @param users*/private static void saveUsersToFile(List<User> users) {try (BufferedWriter writer = new BufferedWriter(new FileWriter("users.csv"))) {writer.write("ID,Name,Phone,Age,Address\n");for (User user : users) {writer.write(String.format("%d,%s,%s,%d,%s\n",user.getId(),user.getName(),user.getPhone(),user.getAge(),user.getAddress()));}writer.flush();System.out.println("Users saved to file successfully.");} catch (IOException e) {e.printStackTrace();}}
}