(原创)利用gson组件,将复杂嵌套的json字符串转换为带有List类型的bean对象

要将嵌套的json字符串进行转换,就需要让程序知道要转换的嵌套类型,这里就需要用到 泛型.
ResultVo.java (bean对象)

public class ResultVo {
   private String result;
   private  List list;
   public String getResult() {
        return result;
    }
    public void setResult(String result) {
        this.result = result;
    }
   public List getList() {
        return list;
    }
    public void setList(List list) {
        this.list = list;
    }
}

AppInfoEntity.java (List里保存的对象)

public class AppInfoEntity {

private String appInfoName;
private String appInfoIcon;

//get set 方法省略 .......

}

测试类

import java.util.ArrayList;
import java.util.List;

import com.fsti.cms.admin.vo.AppInfoEntity;
import com.fsti.cms.admin.vo.ResultVo;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

public class TestGson {

private final static Gson gson = new Gson();
public static void main(String[] args) {
ResultVo rv = new ResultVo();
// rv.setResult("成功了");
//rv.setTotal(23);
// List list = new ArrayList();
// AppInfoEntity appInfo = new AppInfoEntity();
// appInfo.setAppInfoName("应用1");
// appInfo.setAppInfoIcon("图标1");
// AppInfoEntity appInfo1 = new AppInfoEntity();
// appInfo1.setAppInfoName("应用1");
// list.add(appInfo);
// list.add(appInfo1);
// rv.setList(list);
// System.out.println(gson.toJson(rv)); //1. 从bean对象转换为json
String json="{\"result\":\"成功了\",\"list\":[{\"appInfoName\":\"应用1\",\"appInfoIcon\":\"图标1\"},"

+"{\"appInfoName\":\"应用1\"}],\"total\":23}";
//String json1= "{\"result\":\"成功了\",\"total\":23}";
rv = gson.fromJson(json, new TypeToken>(){}.getType());

//告诉程序保存的是含有AppInfoEntity的List对象

//2. json转换为bean对象
//rv = gson.fromJson(json1, rv.getClass());
System.out.println(rv.getResult()+","+rv.getList().get(0).getAppInfoName());//
}

}