Jackson将json string转为Object,org.json读取json数组的实例

{ "name":"name", "id":"id", "color":[  {"red":"red","blue":"blue"},  {"white":"white"} ]}

package com;import org.codehaus.jackson.map.ObjectMapper;import org.json.JSONArray;import org.json.JSONObject;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import java.io.*;import java.util.Map;/** * Hello world! * */public class JsonAnalysis{ private static final Logger LOG = LoggerFactory.getLogger(JsonAnalysis.class); public static void main(String[] args) throws FileNotFoundException {  String jsonString = "{/"address/":/"address/",/"name/":/"name/",/"id/":/"1/",/"email/":/"email/"}";  FileReader fileReader = new FileReader("E://JsonAnalysis//src//test.json");  String fileString = readFile(fileReader);  //Json字符串转java对象,比如转为Map对象读取其中数据  Map map = null;  Map mapFile = null;  try {   map = readValue(jsonString, Map.class);   mapFile = readValue(fileString, Map.class);  } catch (Exception e) {   e.printStackTrace();   LOG.error("ReadValue occur exception when switch json string to map");  }  System.out.println(map != null ? map.get("id") : null);  if (mapFile==null){   LOG.info("Json map form file is empty");   return;  }  System.out.println(mapFile.get("name"));  try {   readJsonArray(fileString);  } catch (Exception e) {   e.printStackTrace();  } } //Json string to object private static <T> T readValue(String jsonStr, Class<T> valueType) throws Exception{  ObjectMapper objectMapper = new ObjectMapper();  try {//   Object object = objectMapper.readValue(jsonStr,Object.class);   return objectMapper.readValue(jsonStr,valueType);  } catch (IOException e) {   e.printStackTrace();  }  return null; } //Read file and to string private static String readFile(FileReader fileReader){  BufferedReader bufferedReader = new BufferedReader(fileReader);  StringBuilder fileStr = new StringBuilder();  try {   String eachLine;   while ((eachLine=bufferedReader.readLine())!=null){    fileStr.append(eachLine);   }   return fileStr.toString();  } catch (IOException e1) {   e1.printStackTrace();   LOG.error("Occur exception when read file,file={}",fileReader);   return null;  } } //根据json string 获取json array,读取数据（ 注意该部分引用的是org.json 包） private static void readJsonArray(String jsonStr) throws Exception {  JSONObject jsonObject = new JSONObject(jsonStr);  JSONArray jsonArray = jsonObject.getJSONArray("color");  JSONObject jsonObject1 = jsonArray.getJSONObject(0);  System.out.println(jsonObject1.get("red")); }}