java pojo 建造者模式

1、示例代码

import lombok.Data;/*** 地址相关配置** @author wangmingcong*/
@Data
public class UrlConfig {
    /*** 地址*/private String host;/*** 端口*/private Integer port;/*** 路径*/private String path;/*** 建造者*/public static final class Builder {
    /*** 配置文件*/private final UrlConfig urlConfig;/*** 私有构造函数*/private Builder() {
    urlConfig = new UrlConfig();}/*** 构建 建造者** @return 返回 建造者*/public static Builder builder() {
    return new Builder();}/*** 赋值** @param host 主机/地址* @return 返回 建造者*/public Builder withHost(String host) {
    urlConfig.setHost(host);return this;}/*** 赋值 端口** @param host 端口* @return 返回 建造者*/public Builder withPort(Integer port) {
    urlConfig.setPort(port);return this;}/*** 赋值 路径** @param host 路径* @return 返回 建造者*/public Builder withPath(String path) {
    urlConfig.setPath(path);return this;}/*** 构建** @return 返回 建造者*/public Builder but() {
    return builder().withHost(urlConfig.getHost()).withPort(urlConfig.getPort()).withPath(urlConfig.getPath());}/*** 获取 配置文件** @return 返回 配置文件*/public UrlConfig build() {
    return urlConfig;}}
}

2、使用方式

UrlConfig.Builder.builder().setHost(AGENT_HOST).build()