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主要应对复杂对象

builder 插件 直接builder

  1. class BuildProduct{
  2.     private String part1;
  3.     private String part2;
  4.     private String part3;
  5.     private String part4;
  7.     private BuildProduct(Builder builder) {
  8.         part1 = builder.part1;
  9.         part2 = builder.part2;
  10.         part3 = builder.part3;
  11.         part4 = builder.part4;
  12.     }
  15.     public static final class Builder {
  16.         private String part1;
  17.         private String part2;
  18.         private String part3;
  19.         private String part4;
  21.         public Builder() {
  22.         }
  24.         public Builder part1(String val) {
  25.             part1 = val;
  26.             return this;
  27.         }
  29.         public Builder part2(String val) {
  30.             part2 = val;
  31.             return this;
  32.         }
  34.         public Builder part3(String val) {
  35.             part3 = val;
  36.             return this;
  37.         }
  39.         public Builder part4(String val) {
  40.             part4 = val;
  41.             return this;
  42.         }
  44.         public BuildProduct build() {
  45.             return new BuildProduct(this);
  46.         }
  47.     }
  48. }