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使用Jackson操作Json
1.引入jasckson-core.jar,jackson-annotations.jar和jackson-databind.jar
2.因为没有做从http获取和提交json数据,所以做个数据类代替
1 class WxJson { 2 public String getAccess_token() { 3 return access_token; 4 } 5 6 public void setAccess_token(String access_token) { 7 this.access_token = access_token; 8 } 9 10 public int getExpires_in() { 11 return expires_in; 12 } 13 14 public void setExpires_in(int expires_in) { 15 this.expires_in = expires_in; 16 } 17 18 public String getRefresh_token() { 19 return refresh_token; 20 } 21 22 public void setRefresh_token(String refresh_token) { 23 this.refresh_token = refresh_token; 24 } 25 26 public String getOpenid() { 27 return openid; 28 } 29 30 public void setOpenid(String openid) { 31 this.openid = openid; 32 } 33 34 public String getScope() { 35 return scope; 36 } 37 38 public void setScope(String scope) { 39 this.scope = scope; 40 } 41 42 public String getUnionid() { 43 return unionid; 44 } 45 46 public void setUnionid(String unionid) { 47 this.unionid = unionid; 48 } 49 50 private String access_token; 51 private int expires_in; 52 private String refresh_token; 53 private String openid; 54 private String scope; 55 private String unionid; 56 }
3下面先用两种方式将数据转换成json数据,最后将转换的json数据转换回List对象
1 import com.fasterxml.jackson.databind.ObjectMapper; 2 3 import java.io.IOException; 4 import java.util.ArrayList; 5 import java.util.List; 6 7 public class Main { 8 9 public static void main(String[] args) throws IOException { 10 11 WxJson wxJson = new WxJson(); 12 ObjectMapper mapper = new ObjectMapper(); 13 14 // Convert a java object to json 15 wxJson.setAccess_token("ACCESS_TOKEN"); 16 wxJson.setExpires_in(7200); 17 wxJson.setRefresh_token("REFRESH_TOKEN"); 18 wxJson.setOpenid("OPENID"); 19 wxJson.setScope("SCOPE"); 20 wxJson.setUnionid("o6_bmasdasdsad6_2sgVt7hMZOPfL"); 21 String json = mapper.writeValueAsString(wxJson); 22 System.out.println(json); 23 24 List<WxJson> wxJsons = new ArrayList<WxJson>(); 25 wxJsons.add(wxJson); 26 String jsonList = mapper.writeValueAsString(wxJsons); 27 System.out.println(jsonList); 28 29 30 WxJson wxJson1 = mapper.readValue(json, WxJson.class); 31 System.out.println(wxJson1.getAccess_token() + " " + wxJson1.getExpires_in()); 32 33 } 34 }
输出结果
1 {"access_token":"ACCESS_TOKEN","expires_in":7200,"refresh_token":"REFRESH_TOKEN","openid":"OPENID","scope":"SCOPE","unionid":"o6_bmasdasdsad6_2sgVt7hMZOPfL"} 2 [{"access_token":"ACCESS_TOKEN","expires_in":7200,"refresh_token":"REFRESH_TOKEN","openid":"OPENID","scope":"SCOPE","unionid":"o6_bmasdasdsad6_2sgVt7hMZOPfL"}] 3 ACCESS_TOKEN 7200
使用Jackson操作Json
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