Java链式调用实现（以javaBean为例）

定义一个javaBean

public class User {
    public String name;
    public String age;

    public User(String name, String age) {
        this.name = name;
        this.age = age;
    }
}

正常赋值写法

给javaBean添加get/set方法：

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getAge() {
    return age;
}

public void setAge(String age) {
    this.age = age;
}

赋值：

@Configuration
public class MyConfig {

    @Bean
    public User user() {
        User user = new User("张三","18");
        System.out.println(user);
        user.setName("李四");
        user.setAge("17");
        System.out.println(user);
        return user;
    }
}

链式写法

修改get/set方法：

public String getName() {
    return name;
}

public User setName(String name) {
    this.name = name;
    return this;
}

public String getAge() {
    return age;
}

public User setAge(String age) {
    this.age = age;
    return this;
}

赋值：

@Configuration
public class MyConfig {

    @Bean
    public User user() {
        User user = new User("张三","18");
        System.out.println(user);
        user.setName("李四").setAge("17");
        System.out.println(user);
        return user;
    }
}

idea快捷生成链式set方法

在快捷生成弹窗内选择模板为Builder即可：