xutils网络数据请求，fastjson解析数据

//使用xUtils框架需要有以下权限:网络请求、外部存储
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

1.在APP的gradle里的dependencies声明一下

 //引进xutils
    compile 'org.xutils:xutils:3.3.40'
//引进fastjson
    compile 'com.alibaba:fastjson:1.1.52.android'

在android里加入

//引进fastjson
sourceSets {
        main {
            jniLibs.srcDirs = ['libs']
        }
    }
    productFlavors {
    }
    repositories {
        flatDir {
dirs 'libs' //this way we can find the .aar file in libs folder
        }
        maven {
            url "https://jitpack.io"
        }
    }

2.在Application的onCreate函数里初始化xUtils：

 //初始化xUtils
        x.Ext.init(this);

（ 此处我新建了一个BaseApplication extends Application，要使用BaseApplication ，需要去AndroidMainfest.xml里为application添加 android:name=”.BaseApplication” 这样才能起作用）

3.准备工作结束，现在开始直接上代码（UserMode的使用必须在4、5步骤的前提下）：

 RequestParams requestParams = new RequestParams(Constant.LOGINURL);
        requestParams.addBodyParameter("username", userName);
        requestParams.addBodyParameter("password", password);
//UserMode为自己定义的数据类型，根据需要自行更改（改为String后，可在onSuccess里输出整个获取到的数据）
        x.http().post(requestParams, new Callback.CommonCallback<UserMode>() {
@Override
public void onSuccess(UserMode  userMode) {
                tvShowInfor.setText("登陆成功"  );

if (userMode == null) {
return;
                }
                UserMode.ObjBean user = userMode.getObj();
if (user != null) {
                    tvShowInfor.setText("登录名 "+userMode.getObj().getDengluming());

boolean b = CookieUtil.saveUserInfo(userMode);//把用户信息存入cookie
if (b) {
                        CookieUtil.setAuth(true);//标记已存入
                        Intent intent = new Intent(LoginActivity.this, HomeActivity.class);
                        startActivity(intent);
                        finish();
                    }
                } else {
if (!TextUtils.isEmpty(userMode.getMsg())) {
                        tvShowInfor.setText(userMode.getMsg());
                    }
                }
            }

@Override
public void onError(Throwable ex, boolean isOnCallback) {
                tvShowInfor.setText("登陆失败，请重试");
                ex.printStackTrace();
            }

@Override
public void onCancelled(CancelledException cex) {

            }

@Override
public void onFinished() {

            }
        });

4.JsonRespondParse为自定义类，用于处理Json数据，功能自行决定

 import com.alibaba.fastjson.JSON;
import org.xutils.common.util.ParameterizedTypeUtil;
import org.xutils.http.app.ResponseParser;
import org.xutils.http.request.UriRequest;

import java.lang.reflect.Type;
import java.util.List;


public class JsonRespondParse implements ResponseParser {
@Override
public void checkResponse(UriRequest request) throws Throwable {

    }

@Override
public Object parse(Type resultType, Class<?> resultClass, String result) throws Throwable {
//判断整个数据是不是由一个List包裹起来的
if (resultClass == List.class) {
//将List解析成一个个小的对象（List的名字叫datas）
            result = JSON.parseObject(result).getString("datas");
//解析成小的vo对象
return JSON.parseArray(result, (Class<?>)     ParameterizedTypeUtil.getParameterizedType(resultType, List.class, 0));
        } else {  //如果不是用List组成的则直接将Json进行解析成vo实体类
return JSON.parseObject(result, resultClass);
        }
    }
}

5.新建一个类名为 UserMode，并利用json数据结构自动生成其余代码，完整代码如下：

 import com.lotus.cookiedemo.helper.JsonRespondParse;
import org.xutils.http.annotation.HttpResponse;
import java.io.Serializable;
//JsonRespondParse为自定义类，并 implements ResponseParser 
//一定要写上这一句话，用于自动按规则解析Json数据
@HttpResponse(parser = JsonRespondParse.class)
public class UserMode implements Serializable {

private boolean success;
private String msg;
private ObjBean obj;
private Object list;
private String js;

public boolean isSuccess() {
return success;
    }

public void setSuccess(boolean success) {
this.success = success;
    }

public String getMsg() {
return msg;
    }

public void setMsg(String msg) {
this.msg = msg;
    }

public ObjBean getObj() {
return obj;
    }

public void setObj(ObjBean obj) {
this.obj = obj;
    }

public Object getList() {
return list;
    }

public void setList(Object list) {
this.list = list;
    }

public String getJs() {
return js;
    }

public void setJs(String js) {
this.js = js;
    }

public static class ObjBean implements Serializable{

private int sysyonghuid;
private String dengluming;
private String mima;
private String xingming;
private String xingbie;
private String dianhua;
private String shengri;
private String shangciriqi;
private String shangciip;
private String bumen;
private String juese;
private String touxiang;
private String token;

public int getSysyonghuid() {
return sysyonghuid;
        }

public void setSysyonghuid(int sysyonghuid) {
this.sysyonghuid = sysyonghuid;
        }

public String getDengluming() {
return dengluming;
        }

public void setDengluming(String dengluming) {
this.dengluming = dengluming;
        }

public String getMima() {
return mima;
        }

public void setMima(String mima) {
this.mima = mima;
        }

public String getXingming() {
return xingming;
        }

public void setXingming(String xingming) {
this.xingming = xingming;
        }

public String getXingbie() {
return xingbie;
        }

public void setXingbie(String xingbie) {
this.xingbie = xingbie;
        }

public String getDianhua() {
return dianhua;
        }

public void setDianhua(String dianhua) {
this.dianhua = dianhua;
        }

public String getShengri() {
return shengri;
        }

public void setShengri(String shengri) {
this.shengri = shengri;
        }

public String getShangciriqi() {
return shangciriqi;
        }

public void setShangciriqi(String shangciriqi) {
this.shangciriqi = shangciriqi;
        }

public String getShangciip() {
return shangciip;
        }

public void setShangciip(String shangciip) {
this.shangciip = shangciip;
        }

public String getBumen() {
return bumen;
        }

public void setBumen(String bumen) {
this.bumen = bumen;
        }

public String getJuese() {
return juese;
        }

public void setJuese(String juese) {
this.juese = juese;
        }

public String getTouxiang() {
return touxiang;
        }

public void setTouxiang(String touxiang) {
this.touxiang = touxiang;
        }

public String getToken() {
return token;
        }

public void setToken(String token) {
this.token = token;
        }
    }
}