import java.io.BufferedReader;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;

/**
 * 获取接口传递的JSON数据
 * @explain
 * @param request HttpServletRequest对象
 * @return JSON格式数据
 */
public static JSONObject getJsonReqData () {
    // 获取Request对象
    HttpServletRequest request = ServletActionContext.getRequest();
    StringBuffer sb = new StringBuffer();
    try {
        // json格式字符串
        String jsonStr = "";
        // 获取application/json格式数据，返回字符流
        BufferedReader reader = request.getReader();
        // 对字符流进行解析
        while ((jsonStr = reader.readLine()) != null) {
            sb.append(jsonStr);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    
    // 将json字符串（jsonStr）-->json对象（JSONObject）
    JSONObject jo = JSONObject.fromObject(sb.toString());
    return jo;
}