java操作json实例

package com.hankcs; import org.codehaus.jackson.map.ObjectMapper; import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.Map; // 东北大亨 public class Main { public static void main(String[] args) { // write your code here ObjectMapper mapper = new ObjectMapper(); // can reuse, share globally try { // 读取JSON数据 Map<String,Object> userData = mapper.readValue(new File("user.json"), Map.class); System.out.println(userData); // 写入JSON数据 userData = new HashMap<String,Object>(); Map<String,String> nameStruct = new HashMap<String,String>(); nameStruct.put("first", "Joe"); nameStruct.put("last", "Hankcs"); userData.put("name", nameStruct); userData.put("gender", "MALE"); userData.put("verified", Boolean.FALSE); userData.put("userImage", "Rm9vYmFyIQ=="); mapper.writeValue(new File("user-modified.json"), userData); } catch (IOException e) { e.printStackTrace(); } } }