# springboot-demo-openjdk21

**Repository Path**: baihr/springboot-demo-openjdk21

## Basic Information

- **Project Name**: springboot-demo-openjdk21
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2024-11-17
- **Last Updated**: 2026-01-27

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# springboot-demo-openjdk21

## 克隆项目

```bash
mkdir ~/workspace
cd ~/workspace
git clone https://gitee.com/baihr/springboot-demo-openjdk21.git
```

## 部署 OpenJDK21

```bash
cd /tmp
wget https://builds.openlogic.com/downloadJDK/openlogic-openjdk/21.0.5+11/openlogic-openjdk-21.0.5+11-linux-x64.tar.gz

sudo mkdir /usr/java
sudo tar -xzvf OpenJDK21U-jdk_x64_linux_hotspot_21.0.5_11.tar.gz -C /usr/java
```

编辑 `/etc/profile`，设置环境变量：

```bash
export JAVA_HOME=/usr/java/jdk-21.0.5+11
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH
```

执行 `source /etc/profile`，使 profile 文件生效后，执行 `java -version` 验证。

## 部署 Mavne

```bash
cd /tmp
wget https://dlcdn.apache.org/maven/maven-3/3.9.8/binaries/apache-maven-3.9.8-bin.tar.gz
sudo tar -zxvf apache-maven-3.9.8-bin.tar.gz -C /opt

# 设置 PATH
echo -e '# set maven\nPATH="/opt/apache-maven-3.9.8/bin:$PATH"\n' >> ~/.bashrc
source ~/.bashrc

# 验证
mvn -v
```

编辑配置文件 `vim /opt/apache-maven-3.9.8/conf/settings.xml`，在 `<mirrors>` 标签下添加以下镜像源：

```xml
    <mirror>
      <id>aliyunmaven</id>
      <mirrorOf>*</mirrorOf>
      <name>aliyun public repository</name>
      <url>https://maven.aliyun.com/repository/public</url>
    </mirror>
```

## 构建应用

```bash
cd ~/workspace/springboot-demo-openjdk21
mvn clean
mvn package -DskipTests
```

## 运行应用

```bash
# 下载探针
cd ~/workspace/springboot-demo-openjdk21
wget -O dd-java-agent.jar "https://static.guance.com/dd-image/dd-java-agent.jar"

# 注入环境变量
export DD_AGENT_HOST=localhost
export DD_TRACE_AGENT_PORT=9529
export DD_JMXFETCH_STATSD_PORT=8125
export DD_ENV=dev
export DD_VERSION=1.0.0

# 启动应用
java \
-javaagent:$HOME/workspace/springboot-demo-openjdk21/dd-java-agent.jar \
-jar $HOME/workspace/springboot-demo-openjdk21/target/springboot-demo-openjdk21-0.0.1-SNAPSHOT.jar
```

## 测试接口

```bash
# 获取 User
curl -X GET "http://127.0.0.1:8080/api/v1/user" -H "Content-Type: application/json"

# 更新 User
curl -X POST "http://127.0.0.1:8080/api/v1/user?name=coder&age=36" -H "Content-Type: application/json"

# 根据名称获取参数，加入了 1 秒延迟
curl -X GET "http://127.0.0.1:8080/api/v1/user/coder"

# 捕获除 0 异常
curl -X GET "http://127.0.0.1:8080/api/v1/catch-error" -H "Content-Type: application/json"

# 未捕获除 0 异常
curl -X GET "http://127.0.0.1:8080/api/v1/no-catch-error" -v
```

## 构建并运行镜像

```bash
docker build -t example/springboot-demo-openjdk21:0.0.1 .
docker run --rm -p 8080:8080 example/springboot-demo-openjdk21:0.0.1
```