builder模式优点在于可以简化对象赋值的过程,也可以在设计类的时候,设置哪些属性必须赋值,哪些不是必须赋值的,代码如下:
public class PathOBJ {
private String path_input = "";
private String path_output = "";
private String run_sign = "";
public PathOBJ(Build build) {
this.path_input = build.path_input;
this.path_output = build.path_output;
this.run_sign = build.run_sign;
}
public static class Build {
private String path_input = "";
private String path_output = "";
private String run_sign = "";
public Build setPath_input(String path_input) {
this.path_input = path_input;
return this;
}
public Build setPath_output(String path_output) {
this.path_output = path_output;
return this;
}
public Build setRun_sign(String run_sign) {
this.run_sign = run_sign;
return this;
}
public PathOBJ create() {
return new PathOBJ(this);
}
}
}
也可以设置get方法,便于后期获取属性,或者修改pathOBJ类属性的访问修饰符。