封装JSON工具类

src/main/java/com/sjhy/plugin/tool/JSON.java

@@ -0,0 +1,94 @@
+package com.sjhy.plugin.tool;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+
+/**
+ * json工具
+ *
+ * @author makejava
+ * @version 1.0.0
+ * @date 2021/08/14 10:37
+ */
+public class JSON {
+
+    private static final ObjectMapper INSTANCE;
+
+    private static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
+
+    static {
+        INSTANCE = new ObjectMapper();
+        // 禁止将日期序列化成时间戳
+        INSTANCE.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
+        // 禁止属性不存在时报错
+        INSTANCE.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
+        // 允许字符串转换成数组
+        INSTANCE.enable(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY);
+        // 读取到未知的枚举值转换成空
+        INSTANCE.enable(DeserializationFeature.READ_UNKNOWN_ENUM_VALUES_AS_NULL);
+        // 禁用科学计数法
+        INSTANCE.enable(DeserializationFeature.USE_BIG_INTEGER_FOR_INTS);
+        INSTANCE.enable(DeserializationFeature.USE_BIG_DECIMAL_FOR_FLOATS);
+        // 序列化忽略空值
+        INSTANCE.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+        // 配置时间格式
+        INSTANCE.setDateFormat(new SimpleDateFormat(DATE_FORMAT));
+    }
+
+    public static ObjectMapper getInstance() {
+        return INSTANCE;
+    }
+
+    /**
+     * 将json字符串转换成java对象
+     *
+     * @param json json字符串
+     * @param cls  java对象类型
+     * @param <T>  对象类型
+     * @return 对象
+     */
+    public static <T> T parse(String json, Class<T> cls) {
+        try {
+            return INSTANCE.readValue(json, cls);
+        } catch (IOException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    /**
+     * 将json字符串转换成java对象
+     *
+     * @param json json字符串
+     * @param type java对象类型
+     * @param <T>  对象类型
+     * @return 对象
+     */
+    public static <T> T parse(String json, TypeReference<T> type) {
+        try {
+            return INSTANCE.readValue(json, type);
+        } catch (IOException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    /**
+     * 将json对象转换成json字符串
+     *
+     * @param obj 对象
+     * @return json字符串
+     */
+    public static String toJson(Object obj) {
+        try {
+            return INSTANCE.writeValueAsString(obj);
+        } catch (JsonProcessingException e) {
+            throw new IllegalArgumentException(e);
+        }
+    }
+}