Go后端调用Java服务：多语言集成策略与实践

package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "io/ioutil"
    "net/http"
    "time"
)

// JavaServiceResponse 模拟Java服务返回的数据结构
type JavaServiceResponse struct {
    Message string `json:"message"`
    Status  string `json:"status"`
}

func main() {
    // 假设Java服务运行在 http://localhost:8080/api/greet
    javaServiceURL := "http://localhost:8080/api/greet"

    // 准备请求体（如果需要）
    requestBody := map[string]string{"name": "GoClient"}
    jsonBody, err := json.Marshal(requestBody)
    if err != nil {
        fmt.Printf("Error marshalling request body: %v\n", err)
        return
    }

    // 创建HTTP客户端，设置超时
    client := &http.Client{Timeout: 10 * time.Second}

    // 构建HTTP POST请求
    req, err := http.NewRequest("POST", javaServiceURL, bytes.NewBuffer(jsonBody))
    if err != nil {
        fmt.Printf("Error creating request: %v\n", err)
        return
    }
    req.Header.Set("Content-Type", "application/json") // 设置请求头

    // 发送请求
    resp, err := client.Do(req)
    if err != nil {
        fmt.Printf("Error sending request to Java service: %v\n", err)
        return
    }
    defer resp.Body.Close() // 确保关闭响应体

    // 读取响应体
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        fmt.Printf("Error reading response body: %v\n", err)
        return
    }

    // 检查HTTP状态码
    if resp.StatusCode != http.StatusOK {
        fmt.Printf("Java service returned non-OK status: %d, body: %s\n", resp.StatusCode, string(body))
        return
    }

    // 解析JSON响应
    var javaResp JavaServiceResponse
    err = json.Unmarshal(body, &javaResp)
    if err != nil {
        fmt.Printf("Error unmarshalling Java service response: %v\n", err)
        return
    }

    fmt.Printf