meidu2021/daju/target/classes/cn/com/lzt/common/view/JsonDataModelAndView.java

package cn.com.lzt.common.view;

import com.alibaba.fastjson.JSON;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.View;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;

public class JsonDataModelAndView extends ModelAndView {
    private Object objectJson;
    private  static  Gson gson = new Gson();

    public JsonDataModelAndView(Object objectJson){
        super();
        this.objectJson= objectJson;
    }

    @Override
    public View getView(){
        return new View() {
            @Override
            public String getContentType() {
                return "application/json;charset=utf-8";
            }

            @Override
            public void render(Map<String, ?> map, HttpServletRequest httpServletRequest,
                               HttpServletResponse httpServletResponse) throws Exception {
                httpServletResponse.setContentType(getContentType());
                ServletOutputStream out =   httpServletResponse.getOutputStream();
                try
                {
                    if(objectJson != null)
                    {
                        String json = JSON.toJSONString(objectJson);
                        byte[] bytes = json.getBytes("utf-8");
                        out.write(bytes);
                        out.flush();
                    }
                }finally
                {
                    if(out != null)
                    {
                        out.close();
                    }
                }
            }
        };
    }
}