json web token JWT實現TP5建立和驗證
阿新 • • 發佈:2021-08-25
1. 鏈式程式設計原理:呼叫方法返回當前物件引用。
以模擬計算器的加減乘除為例
計算器類
public class Calc { private Integer value; public Calc() { this.value = 0; } public Calc add(Integer add) { this.value += add; return this; } public Calc sub(Integer sub) { this.value -= sub; return this; } public Calc mul(Integer mul) { this.value *= mul; return this; } public Calc div(Integer div) { this.value /= div; return this; } public Integer getValue() { return this.value; } }
測試類
public class Main {
public static void main(String[] args) {
Calc calc = new Calc();
calc.add(15).sub(5).mul(10).div(25);
System.out.println(calc.getValue());
}
}
效果
D:\Java_JDK\JDK8u202\bin\java.exe "-javaagent:D:\JetBrainsDeveloperTools\IntelliJ IDEA 2021.2\lib\idea_rt.jar=3225:D:\JetBrainsDeveloperTools\IntelliJ IDEA 2021.2\bin" -Dfile.encoding=UTF-8 -classpath "D:\Java_JDK\JDK8u202\jre\lib\charsets.jar;D:\Java_JDK\JDK8u202\jre\lib\deploy.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\access-bridge-64.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\cldrdata.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\dnsns.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\jaccess.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\jfxrt.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\localedata.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\nashorn.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\sunec.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\sunjce_provider.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\sunmscapi.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\sunpkcs11.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\zipfs.jar;D:\Java_JDK\JDK8u202\jre\lib\javaws.jar;D:\Java_JDK\JDK8u202\jre\lib\jce.jar;D:\Java_JDK\JDK8u202\jre\lib\jfr.jar;D:\Java_JDK\JDK8u202\jre\lib\jfxswt.jar;D:\Java_JDK\JDK8u202\jre\lib\jsse.jar;D:\Java_JDK\JDK8u202\jre\lib\management-agent.jar;D:\Java_JDK\JDK8u202\jre\lib\plugin.jar;D:\Java_JDK\JDK8u202\jre\lib\resources.jar;D:\Java_JDK\JDK8u202\jre\lib\rt.jar;D:\My Projects\SpringMVC\ssm_demo\out\production\test" top.harmonytqs.Main 4 Process finished with exit code 0
2. Lombok中可使用setter鏈式程式設計為屬性賦值
Person類
@Accessors(chain = true)//@Accessors(chain = true)使用此註解開啟鏈式程式設計
@Data
@NoArgsConstructor
public class Person {
private String name;
private Integer age;
private String gender;
}
測試類
public class Main { public static void main(String[] args) { Person person = new Person(); person.setName("張三").setAge(21).setGender("男"); System.out.println(person); } }
效果
D:\Java_JDK\JDK8u202\bin\java.exe "-javaagent:D:\JetBrainsDeveloperTools\IntelliJ IDEA 2021.2\lib\idea_rt.jar=10944:D:\JetBrainsDeveloperTools\IntelliJ IDEA 2021.2\bin" -Dfile.encoding=UTF-8 -classpath "D:\Java_JDK\JDK8u202\jre\lib\charsets.jar;D:\Java_JDK\JDK8u202\jre\lib\deploy.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\access-bridge-64.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\cldrdata.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\dnsns.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\jaccess.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\jfxrt.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\localedata.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\nashorn.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\sunec.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\sunjce_provider.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\sunmscapi.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\sunpkcs11.jar;D:\Java_JDK\JDK8u202\jre\lib\ext\zipfs.jar;D:\Java_JDK\JDK8u202\jre\lib\javaws.jar;D:\Java_JDK\JDK8u202\jre\lib\jce.jar;D:\Java_JDK\JDK8u202\jre\lib\jfr.jar;D:\Java_JDK\JDK8u202\jre\lib\jfxswt.jar;D:\Java_JDK\JDK8u202\jre\lib\jsse.jar;D:\Java_JDK\JDK8u202\jre\lib\management-agent.jar;D:\Java_JDK\JDK8u202\jre\lib\plugin.jar;D:\Java_JDK\JDK8u202\jre\lib\resources.jar;D:\Java_JDK\JDK8u202\jre\lib\rt.jar;D:\My Projects\SpringMVC\ssm_demo\out\production\test;D:\My Projects\SpringMVC\ssm_demo\test\src\top\harmonytqs\lombok-1.18.20.jar" top.harmonytqs.Main
Person(name=張三, age=21, gender=男)
Process finished with exit code 0