实体类
<code>public class User { private String name; private String phone; private String idCard; public User() { } public User(String name, String phone, String idCard) { this.name = name; this.phone = phone; this.idCard = idCard; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public String getIdCard() { return idCard; } public void setIdCard(String idCard) { this.idCard = idCard; } public static List<user> getUsers(){ List<user> list = new ArrayList<>(); list.add(new User("张三", "13800138000", "64011119890034")); list.add(new User("李四", "13800138001", "83011119890039")); list.add(new User("张三", "13800138002", "64111119890030")); list.add(new User("周姐西", "13800138003", "64111119890030")); list.add(new User("西门吹灯", "13800138004", "64111119890038")); return list; } @Override public String toString() { return "User{" + "name='" + name + '\\'' + ", phone='" + phone + '\\'' + ", idCard='" + idCard + '\\'' + '}'; }/<user>/<user>/<code>测试方法
<code>public class StreamTest { @Test public void test1() { List<user> users = User.getUsers(); System.out.println("原始数据:"); users.stream().forEach(System.out::println); System.out.println(); System.out.println("同时给姓名、手机号加*,并返回新list:"); List<user> list3 = users.stream().map(u -> { String name = u.getName(); name = "*" + name.substring(1); u.setName(name); return u; }).map(u -> { String phone = u.getPhone(); String newPhone = phone.substring(0, 3) + "****" + phone.substring(7); u.setPhone(newPhone); return u; }).collect(Collectors.toList()); list3.stream().forEach(System.out::println); }}/<user>/<user>/<code>结果
<code> 原始数据: User{name='张三', phone='13800138000', idCard='64011119890034'} User{name='周姐西', phone='13800138003', idCard='64111119890030'} User{name='西门吹灯', phone='13800138004', idCard='64111119890038'} 同时给姓名、手机号加*,并返回新list: User{name='*三', phone='138****8000', idCard='64011119890034'} User{name='*姐西', phone='138****8003', idCard='64111119890030'} User{name='*门吹灯', phone='138****8004', idCard='64111119890038'}/<code>
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