java读取本地json数组并解析

1.本地json位置

2,json数据

{
"garbages":
[
{"id":"/m/011k07","ename":"Football","cname":"足球","gtype":"可回收垃圾"},
{"id":"/m/012xff","ename":"Toothbrush","cname":"牙刷","gtype":"有害垃圾"}
]
}

3依赖jar

<!-- json读取支持包 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.47</version>
</dependency>

4.测试代码

/**
* 读取json文件，返回json串
* @param fileName
* @return
*/
public static String readJsonFile(String fileName) {
String jsonStr = "";
try {
File jsonFile = new File(fileName);
FileReader fileReader = new FileReader(jsonFile);

Reader reader = new InputStreamReader(new FileInputStream(jsonFile),"utf-8");
int ch = 0;
StringBuffer sb = new StringBuffer();
while ((ch = reader.read()) != -1) {
sb.append((char) ch);
}
fileReader.close();
reader.close();
jsonStr = sb.toString();
return jsonStr;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}

/**
*解析json串
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception{
String path = GetJson.class.getClassLoader().getResource("garbage.json").getPath();
String s = readJsonFile(path);
JSONObject jobj = JSON.parseObject(s);
JSONArray garbages = jobj.getJSONArray("garbages");
for (int i = 0; i < garbages.size(); i++) {
JSONObject key1 = (JSONObject)garbages.get(i);
String id = (String)key1.get("id");
String ename = (String)key1.get("ename");
String cname = (String)key1.get("cname");
String gtype = (String)key1.get("gtype");
System.out.println(id);
System.out.println(ename);
System.out.println(cname);
System.out.println(gtype);
}
}

}