解析json工具

src/main/scala/tools/json/Jackson.scala

+package tools.json
+
+
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.module.scala.DefaultScalaModule
+
+
+import scala.collection.mutable
+import scala.util.{Failure, Success, Try}
+
+/**
+ * @ClassName: qm.tools.json
+ * @Description: json转换类
+ * @Author: LinYoung
+ * @Date: 2021/5/26
+ * @Time: 13:24
+ */
+object Jackson {
+  private val mapper = new ObjectMapper()
+  mapper.registerModule(DefaultScalaModule)
+
+  /**
+   * 解析一级key
+   *
+   * @param str 要解析的字符串
+   * @return 解析结果
+   */
+  def parseFirstKey(str: String): mutable.Map[String, String] = {
+    val map: mutable.Map[String, String] = mutable.Map()
+    Try {
+      // 获取所有节点
+      val node = mapper.readTree(str)
+      // 获取所有key
+      val keys = node.fieldNames()
+      // 循环所有节点
+      while (keys.hasNext) {
+        val next = keys.next()
+        // 解析一级key
+        map += (next -> node.get(next).toString)
+      }
+    } match {
+      case Success(value) => map
+      case Failure(exception) => map
+    }
+  }
+
+  /**
+   * 解析所有key
+   * 递归操作
+   *
+   * @param str 要解析的字符串
+   * @param res 解析结果map
+   * @return 返回res
+   */
+  def parseAllKey(str: String, res: mutable.Map[String, String]): mutable.Map[String, String] = {
+    Try {
+      // 获取所有节点
+      val node = mapper.readTree(str)
+      // 获取节点所有key
+      val keys = node.fieldNames()
+      // 循环读取所有key
+      while (keys.hasNext) {
+        val key = keys.next()
+        val chNode = node.get(key)
+
+        // 如果子节点是json对象,递归解析子节点
+        if (chNode.isObject) {
+          parseAllKey(chNode.toString, res)
+        }
+        else {
+          res += (key -> chNode.toString)
+        }
+      }
+    } match {
+      // 解析成功
+      case Success(value) => res
+      // 解析失败
+      case Failure(exception) => res
+    }
+  }
+
+  /**
+   * 对象转json
+   *
+   * @param bean 要转的对象
+   * @return json结果
+   */
+  def parseBeanToString(bean: Any): String = {
+    mapper.writeValueAsString(bean)
+  }
+
+
+  /**
+   * json转数组
+   *
+   * @param str json数组
+   * @return scala数组
+   */
+  def parseStringToArray(str: String):Array[Any] = {
+    mapper.readValue(str, classOf[Array[Any]])
+  }
+
+  def main(args: Array[String]): Unit = {
+    val str =
+      """
+        |{
+        |	"name": "qmbigdata05",
+        |	"cluster_name": "ES-Cluster",
+        |	"cluster_uuid": "QdDDUfHFRdyse9OmjPsHxA",
+        |	"version": {
+        |		"number": "7.10.0",
+        |		"build_flavor": "default",
+        |		"build_type": "tar",
+        |		"build_hash": "51e9d6f22758d0374a0f3f5c6e8f3a7997850f96",
+        |		"build_date": "2020-11-09T21:30:33.964949Z",
+        |		"build_snapshot": false,
+        |		"lucene_version": "8.7.0",
+        |		"minimum_wire_compatibility_version": "6.8.0",
+        |		"minimum_index_compatibility_version": "6.0.0-beta1"
+        |	},
+        |	"tagline": "You Know, for Search",
+        | "list":[{
+        |   "add":123456
+        | }]
+        |}
+        |""".stripMargin
+
+    val map: mutable.Map[String, String] = mutable.Map()
+    parseAllKey(str, map)
+    println(parseFirstKey(str))
+    println(map)
+  }
+}