jdk-11

1. 符串自带方法

@Test
public void contextLoads() {
    String str = "woshidage";
    boolean isblank = str.isBlank();  //判断字符串是空白
    boolean isempty = str.isEmpty();  //判断字符串是否为空
    String  result1 = str.strip();    //首位空白
    String  result2 = str.stripTrailing();  //去除尾部空白
    String  result3 = str.stripLeading();  //去除首部空白
    String  copyStr = str.repeat(2);  //复制几遍字符串
    long  lineCount = str.lines().count();  //行数统计
    System.out.println(isblank);
    System.out.println(isempty);
    System.out.println(result1);
    System.out.println(result2);
    System.out.println(result3);
    System.out.println(copyStr);
    System.out.println(lineCount);
}

2. HttpClient加强方法

//同步调用
@Test
public void test2() throws IOException, InterruptedException {
    HttpClient client             = HttpClient.newHttpClient();
    HttpRequest request           = HttpRequest.newBuilder(URI.create("")).build();
    BodyHandler<String>  handler  = HttpResponse.BodyHandlers.ofString();
    HttpResponse<String> response = client.send(request,handler);
    String body                   = response.body();
    System.out.println(body);
}
//异步调用
@Test
public void test3() throws IOException, InterruptedException, ExecutionException {
    HttpClient client             = HttpClient.newHttpClient();
    HttpRequest request           = HttpRequest.newBuilder(URI.create("")).build();
    BodyHandler<String>  handler  = HttpResponse.BodyHandlers.ofString();
    CompletableFuture<HttpResponse<String>> response = client.sendAsync(request,handler);
    HttpResponse<String> result   = response.get();
    String body                   = result.body();
    System.out.println(body);
}