diff --git a/pom.xml b/pom.xml
index cfa39a2..586e01f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -77,12 +77,12 @@
         </dependency>
 
         <!--Json-->
-        <dependency>
-            <groupId>net.sf.json-lib</groupId>
-            <artifactId>json-lib</artifactId>
-            <version>2.4</version>
-            <classifier>jdk15</classifier>
-        </dependency>
+<!--        <dependency>-->
+<!--            <groupId>net.sf.json-lib</groupId>-->
+<!--            <artifactId>json-lib</artifactId>-->
+<!--            <version>2.4</version>-->
+<!--            <classifier>jdk15</classifier>-->
+<!--        </dependency>-->
 
         <!--    七牛云SDK    -->
         <dependency>
diff --git a/src/main/java/cn/celess/blog/configuration/filter/AuthenticationFilter.java b/src/main/java/cn/celess/blog/configuration/filter/AuthenticationFilter.java
index b26597a..1b452da 100644
--- a/src/main/java/cn/celess/blog/configuration/filter/AuthenticationFilter.java
+++ b/src/main/java/cn/celess/blog/configuration/filter/AuthenticationFilter.java
@@ -5,7 +5,7 @@ import cn.celess.blog.entity.Response;
 import cn.celess.blog.service.UserService;
 import cn.celess.blog.util.JwtUtil;
 import cn.celess.blog.util.RedisUtil;
-import net.sf.json.JSONObject;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -81,7 +81,7 @@ public class AuthenticationFilter implements HandlerInterceptor {
         response.setHeader("Content-Type", "application/json;charset=UTF-8");
         try {
             logger.info("鉴权失败，[code:{},msg:{},path:{}]", e.getCode(), e.getMsg(), request.getRequestURI() + "?" + request.getQueryString());
-            response.getWriter().println(JSONObject.fromObject(Response.response(e, null)));
+            response.getWriter().println(new ObjectMapper().writeValueAsString(Response.response(e, null)));
         } catch (IOException ex) {
             ex.printStackTrace();
         }
diff --git a/src/main/java/cn/celess/blog/controller/CommonController.java b/src/main/java/cn/celess/blog/controller/CommonController.java
index 39dca2c..628ed98 100644
--- a/src/main/java/cn/celess/blog/controller/CommonController.java
+++ b/src/main/java/cn/celess/blog/controller/CommonController.java
@@ -9,8 +9,8 @@ import cn.celess.blog.service.QiniuService;
 import cn.celess.blog.util.HttpUtil;
 import cn.celess.blog.util.RedisUtil;
 import cn.celess.blog.util.VeriCodeUtil;
-import net.sf.json.JSONArray;
-import net.sf.json.JSONObject;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -140,7 +140,8 @@ public class CommonController {
      */
     @PostMapping("/imgUpload")
     public void upload(HttpServletRequest request, HttpServletResponse response, @RequestParam("editormd-image-file") MultipartFile file) throws IOException {
-        JSONObject jsonObject = new JSONObject();
+        Map<String, Object> map = new HashMap<>();
+        ObjectMapper mapper = new ObjectMapper();
         String uploadTimesStr = redisUtil.get(request.getRemoteAddr() + "-ImgUploadTimes");
         int uploadTimes = 0;
         if (uploadTimesStr != null) {
@@ -150,11 +151,11 @@ public class CommonController {
             throw new MyException(ResponseEnum.FAILURE.getCode(), "上传次数已达10次，请2小时后在上传");
         }
         request.setCharacterEncoding("utf-8");
-        response.setContentType("text/html");
+        response.setContentType(MediaType.APPLICATION_JSON_UTF8_VALUE);
         if (file.isEmpty()) {
-            jsonObject.put("success", 0);
-            jsonObject.put("message", "上传失败，请选择文件");
-            response.getWriter().println(jsonObject.toString());
+            map.put("success", 0);
+            map.put("message", "上传失败，请选择文件");
+            response.getWriter().println(mapper.writeValueAsString(map));
             return;
         }
         String fileName = file.getOriginalFilename();
@@ -162,29 +163,28 @@ public class CommonController {
         if (".png".equals(mime.toLowerCase()) || ".jpg".equals(mime.toLowerCase()) ||
                 ".jpeg".equals(mime.toLowerCase()) || ".bmp".equals(mime.toLowerCase())) {
             QiniuResponse qiniuResponse = qiniuService.uploadFile(file.getInputStream(), "img_" + System.currentTimeMillis() + mime);
-            jsonObject.put("success", 1);
-            jsonObject.put("message", "上传成功");
-            jsonObject.put("url", "http://cdn.celess.cn/" + qiniuResponse.key);
-            response.getWriter().println(jsonObject.toString());
+            map.put("success", 1);
+            map.put("message", "上传成功");
+            map.put("url", "http://cdn.celess.cn/" + qiniuResponse.key);
+            response.getWriter().println(mapper.writeValueAsString(map));
             redisUtil.setEx(request.getRemoteAddr() + "-ImgUploadTimes", uploadTimes + 1 + "", 2, TimeUnit.HOURS);
             return;
         }
-        jsonObject.put("success", 0);
-        jsonObject.put("message", "上传失败，请上传图片文件");
-        response.getWriter().println(jsonObject.toString());
+        map.put("success", 0);
+        map.put("message", "上传失败，请上传图片文件");
+        response.getWriter().println(mapper.writeValueAsString(map));
     }
 
     @GetMapping("/bingPic")
     public Response bingPic() {
-
-        JSONObject imageObj;
+        ObjectMapper mapper = new ObjectMapper();
+        JsonNode root;
         try {
-            imageObj = JSONObject.fromObject(HttpUtil.get("https://cn.bing.com/HPImageArchive.aspx?format=js&idx=0&n=1&mkt=zh-CN"));
+            root = mapper.readTree(HttpUtil.get("https://cn.bing.com/HPImageArchive.aspx?format=js&idx=0&n=1&mkt=zh-CN"));
         } catch (IOException e) {
             return Response.failure(null);
         }
-        JSONArray jsonArray = imageObj.getJSONArray("images");
-        String imageName = jsonArray.getJSONObject(0).getString("url");
-        return Response.success("https://cn.bing.com" + imageName);
+        JsonNode images = root.get("images").elements().next();
+        return Response.success("https://cn.bing.com" + images.get("url").asText());
     }
 }
diff --git a/src/main/java/cn/celess/blog/controller/TagController.java b/src/main/java/cn/celess/blog/controller/TagController.java
index 95abe06..b09e0c8 100644
--- a/src/main/java/cn/celess/blog/controller/TagController.java
+++ b/src/main/java/cn/celess/blog/controller/TagController.java
@@ -3,12 +3,13 @@ package cn.celess.blog.controller;
 import cn.celess.blog.entity.Response;
 import cn.celess.blog.entity.model.TagModel;
 import cn.celess.blog.service.TagService;
-import net.sf.json.JSONObject;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 /**
  * @author : xiaohai
@@ -44,13 +45,13 @@ public class TagController {
 
     @GetMapping("/tags/nac")
     public Response getTagNameAndCount() {
-        List<JSONObject> nameAndCount = new ArrayList<>();
+        List<Map<String, Object>> nameAndCount = new ArrayList<>();
         List<TagModel> all = tagService.findAll();
         for (TagModel t : all) {
-            JSONObject jsonObject = new JSONObject();
-            jsonObject.put("name", t.getName());
-            jsonObject.put("size", t.getArticles().size());
-            nameAndCount.add(jsonObject);
+            Map<String, Object> map = new HashMap<>(2);
+            map.put("name", t.getName());
+            map.put("size", t.getArticles().size());
+            nameAndCount.add(map);
         }
         return Response.success(nameAndCount);
     }
diff --git a/src/main/java/cn/celess/blog/entity/Response.java b/src/main/java/cn/celess/blog/entity/Response.java
index 7630696..6f35606 100644
--- a/src/main/java/cn/celess/blog/entity/Response.java
+++ b/src/main/java/cn/celess/blog/entity/Response.java
@@ -1,8 +1,9 @@
 package cn.celess.blog.entity;
 
 import cn.celess.blog.enmu.ResponseEnum;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.Data;
-import net.sf.json.JSONObject;
+import lombok.SneakyThrows;
 
 import java.io.Serializable;
 
@@ -56,9 +57,9 @@ public class Response<T> implements Serializable {
         return new Response(r.getCode(), r.getMsg(), result);
     }
 
+    @SneakyThrows
     @Override
     public String toString() {
-        JSONObject jsonObject = JSONObject.fromObject(this);
-        return jsonObject.toString();
+        return new ObjectMapper().writeValueAsString(this);
     }
 }
diff --git a/src/main/java/cn/celess/blog/service/serviceimpl/UserServiceImpl.java b/src/main/java/cn/celess/blog/service/serviceimpl/UserServiceImpl.java
index 10bc0b0..2899599 100644
--- a/src/main/java/cn/celess/blog/service/serviceimpl/UserServiceImpl.java
+++ b/src/main/java/cn/celess/blog/service/serviceimpl/UserServiceImpl.java
@@ -17,8 +17,6 @@ import cn.celess.blog.service.UserService;
 import cn.celess.blog.util.*;
 import com.github.pagehelper.PageHelper;
 import com.github.pagehelper.PageInfo;
-import net.sf.json.JSONArray;
-import net.sf.json.JSONObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -28,9 +26,7 @@ import org.springframework.stereotype.Service;
 import javax.servlet.http.HttpServletRequest;
 import java.beans.Transient;
 import java.io.InputStream;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.UUID;
+import java.util.*;
 import java.util.concurrent.TimeUnit;
 
 /**
@@ -312,14 +308,14 @@ public class UserServiceImpl implements UserService {
 
     @Override
     public Object deleteUser(Integer[] id) {
-        JSONArray status = new JSONArray();
+        List<Map<String, Object>> status = new ArrayList<>();
         if (id == null || id.length == 0) {
             return null;
         }
         for (Integer integer : id) {
             String role = userMapper.getRoleById(integer);
             int deleteResult = 0;
-            JSONObject deleteStatus = new JSONObject();
+            Map<String, Object> deleteStatus = new HashMap<>(3);
             deleteStatus.put("id", integer);
             // 管理员账户不可删
             if ("admin".equals(role)) {