Merge pull request #511 from dmego/fix_json_parse_bug

fix generics type cast exception

hippo4j-common/src/main/java/cn/hippo4j/common/api/JsonFacade.java

@@ -17,6 +17,8 @@
 
 package cn.hippo4j.common.api;
 
+import com.fasterxml.jackson.core.type.TypeReference;
+
 import java.util.List;
 
 /**
@@ -42,6 +44,16 @@ public interface JsonFacade {
      */
     <T> T parseObject(String text, Class<T> clazz);
 
+    /**
+     * Parse object.
+     *
+     * @param text
+     * @param valueTypeRef
+     * @param <T>
+     * @return
+     */
+    <T> T parseObject(String text, TypeReference<T> valueTypeRef);
+
     /**
      * Parse array.
      *

hippo4j-common/src/main/java/cn/hippo4j/common/toolkit/JSONUtil.java

@@ -18,6 +18,7 @@
 package cn.hippo4j.common.toolkit;
 
 import cn.hippo4j.common.api.JsonFacade;
+import com.fasterxml.jackson.core.type.TypeReference;
 
 import java.util.List;
 
@@ -44,6 +45,14 @@ public class JSONUtil {
         return JSON_FACADE.parseObject(text, clazz);
     }
 
+    public static <T> T parseObject(String text, TypeReference<T> valueTypeRef) {
+        if (StringUtil.isBlank(text)) {
+            return null;
+        }
+
+        return JSON_FACADE.parseObject(text, valueTypeRef);
+    }
+
     public static <T> List<T> parseArray(String text, Class<T> clazz) {
         if (StringUtil.isBlank(text)) {
             return null;

hippo4j-common/src/main/java/cn/hippo4j/common/toolkit/JacksonHandler.java

@@ -20,6 +20,7 @@ package cn.hippo4j.common.toolkit;
 import cn.hippo4j.common.api.JsonFacade;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.JavaType;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -61,6 +62,12 @@ public class JacksonHandler implements JsonFacade {
         return MAPPER.readValue(text, javaType);
     }
 
+    @Override
+    @SneakyThrows
+    public <T> T parseObject(String text, TypeReference<T> valueTypeRef) {
+        return MAPPER.readValue(text, valueTypeRef);
+    }
+
     @Override
     @SneakyThrows
     public <T> List<T> parseArray(String text, Class<T> clazz) {

hippo4j-config/src/main/java/cn/hippo4j/config/service/ThreadPoolAdapterService.java

@@ -30,6 +30,7 @@ import cn.hippo4j.config.model.biz.adapter.ThreadPoolAdapterReqDTO;
 import cn.hippo4j.config.model.biz.adapter.ThreadPoolAdapterRespDTO;
 import cn.hutool.core.text.StrBuilder;
 import cn.hutool.http.HttpUtil;
+import com.fasterxml.jackson.core.type.TypeReference;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Maps;
 import lombok.extern.slf4j.Slf4j;
@@ -105,7 +106,7 @@ public class ThreadPoolAdapterService {
             try {
                 String resultStr = HttpUtil.get(urlString, param, HTTP_EXECUTE_TIMEOUT);
                 if (StringUtil.isNotBlank(resultStr)) {
-                    Result<ThreadPoolAdapterRespDTO> restResult = JSONUtil.parseObject(resultStr, Result.class);
+                    Result<ThreadPoolAdapterRespDTO> restResult = JSONUtil.parseObject(resultStr, new TypeReference<Result<ThreadPoolAdapterRespDTO>>(){});
                     result.add(restResult.getData());
                 }
             } catch (Throwable ex) {