json類型的相互轉化
阿新 • • 發佈:2019-02-16
hashmap ++ map() next 互轉 hash system while jobject
package com.test.jsontest; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; import java.util.HashMap; import java.util.Map; import org.apache.commons.io.FileUtils; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; //map-json json--file public class test { public static void pp() throws JSONException, IOException { Map<String,String> map=new HashMap(); map.put("1", "qw"); map.put("2", "qwrr"); JSONObject jb=new JSONObject(map); System.out.println(jb); FileWriter fileWriter=new FileWriter(new File("test.json")); jb.write(fileWriter); fileWriter.flush(); } //對象-json public static void pp1() { stu stu=new stu(); stu.setId(1); stu.setAdd(new address("huben","shiyi")); JSONObject jb=new JSONObject(stu); System.out.println(jb); } //String-json public static void pp2() { String bb="{\"name\":\"lisi\"}"; JSONObject jb=new JSONObject(bb); System.out.println(jb); } //file-json public static void pp3() throws IOException { InputStream inputStream=new FileInputStream(new File("E:\\per.json")); byte[]bytes=new byte[10]; int len=-1; StringBuffer sBuffer=new StringBuffer(); while ((len=inputStream.read(bytes))!=-1) { String string=new String(bytes); sBuffer.append(string); } JSONObject jb=new JSONObject(sBuffer.toString()); System.out.println(jb); } //commons-io---json public static void pp4() throws IOException { String bb=FileUtils.readFileToString(new File("E:\\per.json")); JSONObject jb=new JSONObject(bb); System.out.println(jb); } //jsonarray public static void pp5() { String sj="[{\"name\":\"lisi\"},{\"name1\":\"zs\"}]"; JSONArray jsonArray=new JSONArray(sj); System.out.println(jsonArray); } public static void pp6() { Map<String,String> map=new HashMap(); map.put("1", "qw"); map.put("2", "qwrr"); net.sf.json.JSONArray jArray=new net.sf.json.JSONArray(); jArray=jArray.fromObject(map); System.out.println(jArray); } public static void main(String[] args) throws IOException { // TODO Auto-generated method stub // pp(); // pp1(); // pp2(); // pp3(); // pp4(); // pp5(); pp6(); } } package g1.g1; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import net.sf.json.JSONObject; //map--jsonarray public class test_jsonarray { public static void pp6() { Map<String,String> map=new HashMap(); map.put("1", "qw"); map.put("2", "qwrr"); net.sf.json.JSONArray jArray=new net.sf.json.JSONArray(); jArray=jArray.fromObject(map); System.out.println(jArray); System.out.println(map); } //jsonarray--map public static void pp7() { String ja="[{\"1\":\"qw\",\"2\":\"qwrr\"},{\"1\":\"qw\",\"2\":\"qwrr\"}]"; net.sf.json.JSONArray jArray=new net.sf.json.JSONArray(); jArray=jArray.fromObject(ja); Map<String,Object> map=new HashMap(); System.out.println(jArray); for(int i=0;i<jArray.length()-1;i++) { Object o=jArray.get(i); JSONObject jObject=(JSONObject)o; Iterator<String> iterator=jObject.keys(); while (iterator.hasNext()) { String key = (String) iterator.next(); String value = jObject.getString(key); map.put(key, value); } } System.out.println(map); } public static void main(String[] args) { // TODO Auto-generated method stub // pp6(); pp7(); } }
json類型的相互轉化