项目初始化

klp-common/src/main/java/com/klp/common/utils/JsonUtils.java

@@ -0,0 +1,112 @@
+package com.klp.common.utils;
+
+import cn.hutool.core.lang.Dict;
+import cn.hutool.core.util.ArrayUtil;
+import cn.hutool.core.util.ObjectUtil;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.exc.MismatchedInputException;
+import com.klp.common.utils.spring.SpringUtils;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * JSON 工具类
+ *
+ * @author 芋道源码
+ */
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class JsonUtils {
+
+    private static final ObjectMapper OBJECT_MAPPER = SpringUtils.getBean(ObjectMapper.class);
+
+    public static ObjectMapper getObjectMapper() {
+        return OBJECT_MAPPER;
+    }
+
+    public static String toJsonString(Object object) {
+        if (ObjectUtil.isNull(object)) {
+            return null;
+        }
+        try {
+            return OBJECT_MAPPER.writeValueAsString(object);
+        } catch (JsonProcessingException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static <T> T parseObject(String text, Class<T> clazz) {
+        if (StringUtils.isEmpty(text)) {
+            return null;
+        }
+        try {
+            return OBJECT_MAPPER.readValue(text, clazz);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static <T> T parseObject(byte[] bytes, Class<T> clazz) {
+        if (ArrayUtil.isEmpty(bytes)) {
+            return null;
+        }
+        try {
+            return OBJECT_MAPPER.readValue(bytes, clazz);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static <T> T parseObject(String text, TypeReference<T> typeReference) {
+        if (StringUtils.isBlank(text)) {
+            return null;
+        }
+        try {
+            return OBJECT_MAPPER.readValue(text, typeReference);
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static Dict parseMap(String text) {
+        if (StringUtils.isBlank(text)) {
+            return null;
+        }
+        try {
+            return OBJECT_MAPPER.readValue(text, OBJECT_MAPPER.getTypeFactory().constructType(Dict.class));
+        } catch (MismatchedInputException e) {
+            // 类型不匹配说明不是json
+            return null;
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static List<Dict> parseArrayMap(String text) {
+        if (StringUtils.isBlank(text)) {
+            return null;
+        }
+        try {
+            return OBJECT_MAPPER.readValue(text, OBJECT_MAPPER.getTypeFactory().constructCollectionType(List.class, Dict.class));
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static <T> List<T> parseArray(String text, Class<T> clazz) {
+        if (StringUtils.isEmpty(text)) {
+            return new ArrayList<>();
+        }
+        try {
+            return OBJECT_MAPPER.readValue(text, OBJECT_MAPPER.getTypeFactory().constructCollectionType(List.class, clazz));
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+}