除了跨域

db/init.go

+package db
+
+import (
+	"github.com/sirupsen/logrus"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+// DB 全局数据库实例
+var DB *gorm.DB
+
+// InitDB 初始化 PostgreSQL 数据库
+func InitDB() {
+	// PostgreSQL 连接字符串
+	// 替换为你的实际配置：host、port、user、password、dbname
+	dsn := "host=localhost port=5432 user=go_zyz password=zyz757605 dbname=mygo sslmode=disable"
+	var err error
+	DB, err = gorm.Open(postgres.Open(dsn), &gorm.Config{})
+	if err != nil {
+		logrus.WithError(err).Fatal("数据库连接失败")
+	}
+
+	// 自动迁移，创建/更新 Comment 表
+	if err := DB.AutoMigrate(&Comment{}); err != nil {
+		logrus.WithError(err).Fatal("数据库迁移失败")
+	}
+
+	logrus.Info("PostgreSQL 数据库初始化成功")
+}

db/model.go

+package db
+
+import (
+	"github.com/sirupsen/logrus"
+	"gorm.io/gorm"
+)
+
+// Comment 数据库模型
+type Comment struct {
+	ID      int    `json:"id" gorm:"primaryKey;autoIncrement"`
+	Name    string `json:"name" gorm:"not null"`
+	Comment string `json:"content" gorm:"not null"`
+}
+
+// CreateComment 创建评论
+func CreateComment(name, content string) (*Comment, error) {
+	comment := &Comment{
+		Name:    name,
+		Comment: content,
+	}
+	if err := DB.Create(comment).Error; err != nil {
+		logrus.WithError(err).Error("创建评论失败")
+		return nil, err
+	}
+	logrus.WithFields(logrus.Fields{
+		"comment_id": comment.ID,
+		"name":       comment.Name,
+	}).Info("评论创建成功")
+	return comment, nil
+}
+
+// GetComments 获取评论（支持分页）
+func GetComments(page, size int) ([]Comment, int64, error) {
+	var comments []Comment
+	var total int64
+
+	// 查询总数
+	if err := DB.Model(&Comment{}).Count(&total).Error; err != nil {
+		logrus.WithError(err).Error("获取评论总数失败")
+		return nil, 0, err
+	}
+
+	// 分页查询
+	if size == -1 {
+		// 返回所有评论
+		if err := DB.Find(&comments).Error; err != nil {
+			logrus.WithError(err).Error("获取所有评论失败")
+			return nil, 0, err
+		}
+	} else {
+		// 分页
+		offset := (page - 1) * size
+		if err := DB.Limit(size).Offset(offset).Find(&comments).Error; err != nil {
+			logrus.WithError(err).Error("获取分页评论失败")
+			return nil, 0, err
+		}
+	}
+
+	logrus.WithFields(logrus.Fields{
+		"page":  page,
+		"size":  size,
+		"total": total,
+	}).Info("评论查询成功")
+	return comments, total, nil
+}
+
+// DeleteComment 删除评论
+func DeleteComment(id int) error {
+	result := DB.Where("id = ?", id).Delete(&Comment{})
+	if err := result.Error; err != nil {
+		logrus.WithError(err).Error("删除评论失败")
+		return err
+	}
+	if result.RowsAffected == 0 {
+		logrus.WithField("comment_id", id).Warn("评论不存在")
+		return gorm.ErrRecordNotFound
+	}
+	logrus.WithField("comment_id", id).Info("评论删除成功")
+	return nil
+}

go.mod

-module github.com/zyz/comment
+module github.com/zyz/comment-api
 
-go 1.24.3
+go 1.21
 
 require (
-	github.com/sirupsen/logrus v1.9.3 // indirect
-	golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 // indirect
+	github.com/sirupsen/logrus v1.9.3
+	gorm.io/driver/postgres v1.6.0
+	gorm.io/gorm v1.30.0
+)
+
+require (
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/jackc/pgx/v5 v5.6.0 // indirect
+	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	golang.org/x/crypto v0.31.0 // indirect
+	golang.org/x/sync v0.10.0 // indirect
+	golang.org/x/sys v0.28.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
 )

go.sum

 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
+github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
+github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=
+github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761/go.mod h1:5TJZWKEWniPve33vlWYSoGYefn3gLQRzjfDlhSJ9ZKM=
+github.com/jackc/pgx/v5 v5.6.0 h1:SWJzexBzPL5jb0GEsrPMLIsi/3jOo7RHlzTjcAeDrPY=
+github.com/jackc/pgx/v5 v5.6.0/go.mod h1:DNZ/vlrUnhWCoFGxHAG8U2ljioxukquj7utPDgtQdTw=
+github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo=
+github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
+github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
+github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
+github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
+github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
 github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 h1:0A+M6Uqn+Eje4kHMK80dtF3JCXC4ykBgQG4Fe06QRhQ=
+github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
+github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
+golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
+golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
+golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
+golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
+golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gorm.io/driver/postgres v1.6.0 h1:2dxzU8xJ+ivvqTRph34QX+WrRaJlmfyPqXmoGVjMBa4=
+gorm.io/driver/postgres v1.6.0/go.mod h1:vUw0mrGgrTK+uPHEhAdV4sfFELrByKVGnaVRkXDhtWo=
+gorm.io/gorm v1.30.0 h1:qbT5aPv1UH8gI99OsRlvDToLxW5zR7FzS9acZDOZcgs=
+gorm.io/gorm v1.30.0/go.mod h1:8Z33v652h4//uMA76KjeDH8mJXPm1QNCYrMeatR0DOE=

main.go

@@ -3,6 +3,8 @@ package main
 import (
 	"net/http"
 
+	"github.com/zyz/comment-api/db"
+
 	"github.com/sirupsen/logrus"
 )
 
@@ -11,6 +13,9 @@ func main() {
 	logrus.SetFormatter(&logrus.JSONFormatter{})
 	logrus.Info("启动服务器...")
 
+	// 初始化数据库
+	db.InitDB()
+
 	// 注册路由
 	http.HandleFunc("/comment/get", getCommentsHandler)
 	http.HandleFunc("/comment/add", addCommentHandler)

handlers.go → server.go

@@ -4,37 +4,26 @@ import (
 	"encoding/json"
 	"net/http"
 	"strconv"
-	"sync"
+
+	"github.com/zyz/comment-api/db"
 
 	"github.com/sirupsen/logrus"
+	"gorm.io/gorm"
 )
 
-// Comment 表示单个评论
-type Comment struct {
-	ID      int    `json:"id"`
-	Name    string `json:"name"`
-	Comment string `json:"content"`
-}
-
-// Response 表示统一的 API 响应格式
+// Response 统一响应格式
 type Response struct {
 	Code int         `json:"code"`
 	Msg  string      `json:"msg"`
 	Data interface{} `json:"data"`
 }
 
-// GetCommentsResponse 表示获取评论 API 的响应
+// GetCommentsResponse 获取评论响应
 type GetCommentsResponse struct {
-	Total    int       `json:"total"`
-	Comments []Comment `json:"comments"`
+	Total    int64        `json:"total"`
+	Comments []db.Comment `json:"comments"`
 }
 
-// 模拟数据库
-var mutex = &sync.RWMutex{}
-var comments []Comment
-var incrementID int
-
-// getCommentsHandler 处理获取评论的请求
 func getCommentsHandler(w http.ResponseWriter, r *http.Request) {
 	log := logrus.WithFields(logrus.Fields{
 		"method": r.Method,
@@ -53,35 +42,21 @@ func getCommentsHandler(w http.ResponseWriter, r *http.Request) {
 		"size": size,
 	})
 
-	// 使用读锁读取评论
-	mutex.RLock()
-	defer mutex.RUnlock()
-
-	// 计算分页
-	total := len(comments)
-	var result []Comment
-	if size == -1 {
-		result = comments
-	} else {
-		start := (page - 1) * size
-		end := start + size
-		if start < total {
-			if end > total {
-				end = total
-			}
-			result = comments[start:end]
-		}
+	// 查询数据库
+	comments, total, err := db.GetComments(page, size)
+	if err != nil {
+		respondError(w, http.StatusInternalServerError, "查询评论失败", nil, log.WithError(err))
+		return
 	}
 
 	// 准备响应
 	data := GetCommentsResponse{
 		Total:    total,
-		Comments: result,
+		Comments: comments,
 	}
 	respondSuccess(w, data, log)
 }
 
-// addCommentHandler 处理添加评论的请求
 func addCommentHandler(w http.ResponseWriter, r *http.Request) {
 	log := logrus.WithFields(logrus.Fields{
 		"method": r.Method,
@@ -109,27 +84,16 @@ func addCommentHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// 使用写锁添加评论
-	mutex.Lock()
-	defer mutex.Unlock()
-
-	incrementID++
-	newComment := Comment{
-		ID:      incrementID,
-		Name:    req.Name,
-		Comment: req.Content,
+	// 创建评论
+	comment, err := db.CreateComment(req.Name, req.Content)
+	if err != nil {
+		respondError(w, http.StatusInternalServerError, "创建评论失败", nil, log.WithError(err))
+		return
 	}
-	comments = append(comments, newComment)
 
-	log.WithFields(logrus.Fields{
-		"comment_id": newComment.ID,
-		"name":       newComment.Name,
-	}).Info("评论已添加")
-
-	respondSuccess(w, newComment, log)
+	respondSuccess(w, comment, log)
 }
 
-// deleteCommentHandler 处理删除评论的请求
 func deleteCommentHandler(w http.ResponseWriter, r *http.Request) {
 	log := logrus.WithFields(logrus.Fields{
 		"method": r.Method,
@@ -149,28 +113,16 @@ func deleteCommentHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// 使用写锁删除评论
-	mutex.Lock()
-	defer mutex.Unlock()
-
-	found := false
-	for i, comment := range comments {
-		if comment.ID == id {
-			comments = append(comments[:i], comments[i+1:]...)
-			found = true
-			break
+	// 删除评论
+	if err := db.DeleteComment(id); err != nil {
+		if err == gorm.ErrRecordNotFound {
+			respondError(w, http.StatusNotFound, "评论不存在", nil, log)
+		} else {
+			respondError(w, http.StatusInternalServerError, "删除评论失败", nil, log.WithError(err))
 		}
-	}
-
-	if !found {
-		respondError(w, http.StatusNotFound, "评论不存在", nil, log)
 		return
 	}
 
-	log.WithFields(logrus.Fields{
-		"comment_id": id,
-	}).Info("评论已删除")
-
 	respondSuccess(w, nil, log)
 }