*** 经测有效 ***

package springbootTest;

import java.util.ArrayList;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.servlet.mvc.method.annotation.MvcUriComponentsBuilder;
import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
import org.springframework.web.util.UriComponents;
import org.springframework.web.util.UriComponentsBuilder;

import com.project.controller.DemoController;

public class Test1 {
	public static void main(String[] args) {
		UriComponents uriComponents = null;
		String uri = "";
		
		/**
		 * 1、URI动态拼接
		 */
		MultiValueMap<String, String> params = new LinkedMultiValueMap<String, String>();
		List<String> list = new ArrayList<String>();
		list.add("张三");
		list.add("李四");
		params.put("name", list);
		uriComponents = UriComponentsBuilder
				.fromHttpUrl("http://localhost:8080/hello")
				.queryParam("key", "xxxx")
				.queryParams(params)
				.build();
		System.out.println(uriComponents.toUriString());
		//输出：http://localhost:8080/helllo?key=xxxx&name=张三&name=李四

		/**
		 * 2、URI参数替换
		 * 	expand(……):替换参数,URL中有多少大括号，就要放多少参数，必须一一对应
		 * 	encode():编码，默认使用UTF-8
		 * 
		 * 	uriComponents 值不会改变，执行expand()/encode()方法，会返回新的UriComponents实例
		 *   *uriComponents值可复用
		 */
		uriComponents = UriComponentsBuilder
				.fromHttpUrl("http://localhost:8080/hello/{path1}/add/{path2}")
				.build();
		uri = uriComponents.expand("11","22").encode().toUriString();
		System.out.println(uri);
		//输出：http://localhost:8080/hello/11/add/22
		uri = uriComponents.expand("33","44").encode().toUriString();
		System.out.println(uri);
		//输出：http://localhost:8080/hello/33/add/44
		
		/**
		 * 3、使用下面的方式
		 */
		uriComponents = UriComponentsBuilder.newInstance()
				.scheme("http").host("localhost").port("8080").path("/hello/{path1}/delete/{path2}")
				.build();
		uri = uriComponents.expand("aa","bb").encode().toUriString();
		System.out.println(uri);
		//输出：http://localhost:8080/hello/aa/delete/bb
		
		/**
		 * 4、使用子类1：ServletUriComponentsBuilder构建
		 */
		HttpServletRequest request =null;
		uriComponents = ServletUriComponentsBuilder
				.fromRequest(request)
				.replaceQueryParam("aId", "{id}")
				.build();
		uri = uriComponents.expand("123").encode().toUriString();
		System.out.println(uri);
		
		/**
		 * 4、使用子类2：MvcUriComponentsBuilder构建
		 */
		uriComponents = MvcUriComponentsBuilder
				.fromMethodName(DemoController.class, "index", 22)
				.buildAndExpand(42);
		uri = uriComponents.toUriString();
		System.out.println(uri);
	}
}

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