# [Java] 開發環境
###### tags: `Java` `Maven` `JDK`

## JDK 安裝與環境變數設定
1. 下載 JDK
* [Oracle JDK](https://www.oracle.com/java/technologies/downloads/#java17)
* [OpenJDK](https://jdk.java.net/java-se-ri/17)
2. 安裝 JDK
* 將檔案解壓縮至指定的路徑位置
3. 新增/修改環境變數
* JAVA_HOME `C:\Program Files\Java\jdk1.7.0_51` (JDK安裝的路徑)
* PATH `%JAVA_HOME%\bin` (需移至最上層)
* classpath `.;`
4. 驗證是否安裝成功
* 輸入 `java –version` 查看當前版本
* 環境變數設定查看 `javac`

## Maven 安裝與環境變數設定
1. 下載 Maven
* [Apache Maven 3.8.6](https://maven.apache.org/download.cgi) (選擇 Binary zip archive--> Link)
2. 安裝 Maven
* 將檔案解壓縮至指定的路徑位置
3. 新增、修改環境變數
* MAVEN_PATH `C:\Program Files\apache-maven-3.8.6\bin`
* PATH `%MAVEN_PATH%\bin`
4. 驗證是否安裝成功
* 輸入 `mvn -v` 查看當前版本

### 打包 jar
1. 啟動專案
2. 進入要打包的專案目錄內
3. 打包

mvn clean package

3. 會放在目標目錄的 `target` 資料夾內

資料來源:
[執行maven的示範](https://vocus.cc/article/62e39263fd897800018c96ec)
[Apache Maven 建置](https://blog.miniasp.com/post/2022/09/06/Understanding-Apache-Maven-build-tool)

#### 打包失敗

[ERROR] Failures: 
[ERROR]   RepoTests.testCreateRoles:80 
expected: 3
 but was: 6
[ERROR] Errors: 
[ERROR]   RepoTests.testCreateUser:46 ? DataIntegrityViolation could not execute stateme...
[INFO]
[ERROR] Tests run: 3, Failures: 1, Errors: 1, Skipped: 0
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  15.999 s
[INFO] Finished at: 2022-12-08T00:20:35+08:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.22.2:test (default-test) on project Love-And-Share-Demo: There are test failures.
[ERROR]
[ERROR] Please refer to C:\workspace\demo\target\surefire-reports for the individual test results.
[ERROR] Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

需於專案 `pom.xml` 加入以下配置

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <configuration>
        <testFailureIgnore>true</testFailureIgnore>
    </configuration>
</plugin>

### jar 解包

jar -xvf xxx.jar

---
資料來源:
[Installing Apache Maven](https://maven.apache.org/install.html) - apache.org
[解决：target\surefire-reports for the individual test results](https://www.cnblogs.com/ios9/p/14811278.html)