Discuss / Java / 又到了我最喜欢的部署环节哈哈哈哈哈哈哈(疯了

又到了我最喜欢的部署环节哈哈哈哈哈哈哈(疯了

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alienation

#1 Created at ... [Delete] [Delete and Lock User]

学到现在才发现不会判断字符串是否为空

@WebServlet(urlPatterns = "/")
public class HelloServlet extends HttpServlet {

   @Override   protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
      String name = req.getParameter("name");
      if (name == null || name.length() == 0) {
         name = "world";
      }
      resp.setContentType("text/html");
      PrintWriter pw = resp.getWriter();
      pw.write("<h1>Hello, %s!</h1>".formatted(name));
      pw.flush();
   }
}

tomcat需要配置java_home环境变量

maven需要插件maven-war-plugin

。。。

#2 Created at ... [Delete] [Delete and Lock User]

使用这里mvn编译不了不知道为什么

pw.write("<h1>hello,%s!</h1>".formatted(name));

cmd提示找不到符号,

符号:方法 formatted(java.lang.String)

位置:类 java.lang.String

但lang包又不用导入,迷糊了


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