bug 调试了一个下午外加半个晚上的bug

    public void queryTaskResult2() throws Exception {
        HttpServletRequest request = ServletActionContext.getRequest();
        HttpServletResponse response = ServletActionContext.getResponse();
        PrintWriter out = response.getWriter();
        String newsIdselect = request.getParameter("newsIdselect");
        String taskname = request.getParameter("taskname");
        String result = "{success:true,totalProperty: " +  + ",root:[{";
        String mmsAccessResult=null;
        if (newsIdselect != null && !"".equals(newsIdselect)) {
            List<AssessBeforeResult> abrList =  assessBeforeResultService.findAssessResultByTaskId(Integer.valueOf(newsIdselect));
            if(abrList!=null&&abrList.size()>)
            {

                for (int i = ; i < abrList.size(); i++) {
                    AssessBeforeResult abr = abrList.get(i);
                    if(abr.getSampleType()==)
                    {

                        System.out.println(abr.getMmsLeakage());
                        mmsAccessResult = "mmsTaskId:'" + newsIdselect
                                + "',mmsResultId:'"+ abr.getId()
                                + "',mmsTaskName:'" + taskname
                                + "',mmsPrecision:'" + abr.getMmsPrecision()+ "%'"
                                + " ,mmsRecall:'" + abr.getMmsRecall()+ "%'"
                                + " ,mmsErrorrate:'" + abr.getMmsErrorrate()+ "%'"
                                //+ " ,mmsLeakage:'" + abr.getMmsLeakage()+ "%'";
                                + " ,mmsLeakage:'11'";

                    }
                }
            }
        }
        System.out.println(mmsAccessResult);
        if(mmsAccessResult!=null)
        {
            result+=mmsAccessResult;
        }

        result+=",textPrecision:'"+ ""
            + "',textRecall:'"+ ""
            + "',textErrorrate:'"+ ""
            + "',textLeakage:'"+ "";

        result+="'}]}";

        String updateString = "{success:true,totalProperty: 1,root: [{"
                + "mmsTaskId:'"+""
                + "',mmsResultId:'"+ ""
                + "',mmsTaskName:'"+ ""
                + "',mmsPrecision:'"+ ""
                + "',mmsRecall:'"+ ""
                + "',mmsErrorrate:'"+ ""
                + "',mmsLeakage:'"+ ""

                + "',textPrecision:'"+ ""
                + "',textRecall:'"+ ""
                + "',textErrorrate:'"+ ""
                + "',textLeakage:'"+ ""
                + "'}]}";

        System.out.println(result);
        System.out.println(updateString);

        //out.println(updateString);
        out.println(result);
        out.flush();
        out.close();
    }
    

这个问题我调试了好几个小时，就因为前面多了一个“  ’ ”这个符号，输出样例如下

{
    success: true,
    totalProperty: ,
    root: [
        {
            mmsTaskId: '',
            mmsResultId: '',
            mmsTaskName: '???é?????è???????????è???¨?é??è????°',
            mmsPrecision: '25.0%',
            mmsRecall: '16.67%',
            mmsErrorrate: '0.0%',
            mmsLeakage: '83.33%'',
            textPrecision: '',
            textRecall: '',
            textErrorrate: '',
            textLeakage: ''
        }
    ]
}{
    success: true,
    totalProperty: ,
    root: [
        {
            mmsTaskId: '',
            mmsResultId: '',
            mmsTaskName: '',
            mmsPrecision: '',
            mmsRecall: '',
            mmsErrorrate: '',
            mmsLeakage: '',
            textPrecision: '',
            textRecall: '',
            textErrorrate: '',
            textLeakage: ''
        }
    ]
}