用到了jq工具，安装：

sudo apt-get update
sudo apt-get install jq

#!/bin/bash

# 获取动态IP
dynamic_ip=$(curl -s https://myip.ipip.net/json | jq -r .data.ip)

# 如果成功获取到IP，则发起请求
if [ ! -z "$dynamic_ip" ]; then
  echo "Dynamic IP: $dynamic_ip"
  # 设置POST请求的参数，获取ip后自己处理
  api_url="https://api.xxx.com/change_ip"
  #post请求参数
  para1="xxxx"
  para2="xxxx"
  # 发起POST请求
  curl -X POST -d "ip=$dynamic_ip¶1=$para1¶2=$para2" $api_url
else
  echo "Failed to get dynamic IP."
fi