我在远程ami实例上的tomcat服务器(v.7)上运行了项目。
当我尝试编译项目并在本地生成.war文件时,没有问题。
但是当我尝试在远程ami实例上做同样的事情时,我收到以下错误:
[INFO] -------------------------------------------- ----------------- [信息] -------------------------------------------------- ---------------------- [INFO] BUILD FAILURE [INFO] -------------------------------------------------- ---------------------- [INFO]总时间:21.963秒[INFO]完成于:Thu Dec 28 20:01:58 UTC 2017 [INFO]最终记忆:114M / 1431M [INFO] -------------------------------------------------- ---------------------- [错误]无法执行目标 org.apache.maven.plugins:Maven的编译器插件:3.3:编译 项目wildbook上的(default-compile):编译失败: 编译失败:[错误] /home/ubuntu/Wildbook_javaTweetBot/src/main/java/org/ecocean/servlet/ServletUtilities.java:[866,24] 找不到符号[ERROR]符号:方法 join(java.lang.String,java.lang.String [])[ERROR] location:class java.lang.String中
ServletUtilities.java的第866行内容如下:
String text2 = String.join(" ", text1);
对于上下文,这是围绕它的代码块:
text = text.replaceAll("[,.!?;:]", "$0 ");
System.out.println("text: " + text);
String[] text1 = text.replaceAll("[^A-Za-z0-9 ]", "").toLowerCase().split("\\s+"); //TODO I think this does a better version of what the above (text = text.replaceAll("[,.!?;:]", "$0 ");) does??
String text2 = String.join(" ", text1);
我在javarepl本地运行此代码没有问题(我正在使用"等等这是测试12/28/2018"因为我的文本字符串(String text
是传递的参数到上面的代码所在的方法。)
ami实例上的java版本是:
openjdk version" 1.8.0_91" OpenJDK运行时环境(构建 1.8.0_91-8u91-b14-0ubuntu4~14.04-b14)OpenJDK 64位服务器VM(内置25.91-b14,混合模式)
mvn -version
收益:
Apache Maven 3.0.5 Maven主页:/ usr / share / maven Java版本: 1.8.0_91,供应商:Oracle Corporation Java home:/ usr / lib / jvm / java-8-openjdk-amd64 / jre默认语言环境:en_US,platform 编码:UTF-8操作系统名称:" linux",版本:" 3.13.0-48-generic",arch: " amd64",家庭:" unix"
有谁知道为什么会发生这种情况/有关于我可以采取哪些措施来解决下一步问题的建议?
答案 0 :(得分:0)
我无法重现您的问题。我的目录结构如下:
.
├── pom.xml
└── src
└── main
├── java
│ └── com
│ └── example
│ └── maven
│ └── TestServlet.java
└── webapp
└── WEB-INF
└── web.xml
我的pom.xml
是:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example.maven</groupId>
<artifactId>compile-test</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
<showDeprecation>true</showDeprecation>
<showWarnings>true</showWarnings>
<compilerArgument>-Xlint:all</compilerArgument>
</configuration>
</plugin>
</plugins>
</build>
</project>
我在使用Tomcat 7时猜测了servlet规范的3.0版本。我的代码很简单:
@WebServlet(name = "TestServlet", urlPatterns = {"/testServlet"})
public class TestServlet extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String [] blah = {"a", "b", "c"};
String result = String.join("-", blah);
response.setContentType("text/plain");
response.getWriter().println("join result is =\"" + result + "\"");
}
}
Maven是:
Apache Maven 3.0.5 (r01de14724cdef164cd33c7c8c2fe155faf9602da; 2013-02-19 06:51:28-0700)
Maven home: /home/scott/Downloads/apache-maven-3.0.5
Java version: 1.8.0_151, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-8-openjdk-amd64/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "4.10.0-38-generic", arch: "amd64", family: "unix"
我无法找到完全相同的JDK - 我正在使用:
openjdk version "1.8.0_151"
OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)
您可以发布最少量的代码来重现您的问题吗?
修改 - 我知道这是一种评论,但评论中不可能提供这么多信息。