JZTK项目 驾照题库项目servlet层得到的json字符串在浏览器中 汉字部分出现问号？无法正常显示的解决方法

servlet层中的代码如下：

package com.swift.jztk.servlet;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.swift.jztk.biz.IQuestionBiz;
import com.swift.jztk.biz.QuestionBizImpl;

@WebServlet("/getQuestions")
public class GetQuestions extends HttpServlet {
    private static final long serialVersionUID = 1L;
    IQuestionBiz biz = new QuestionBizImpl();

    public GetQuestions() {
        super();
    }

    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.getWriter().append("Served at: ").append(request.getContextPath());
        String testType = request.getParameter("testType");
        String json = biz.getQuestions(testType);
        response.getWriter().println(json);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doGet(request, response);
    }

}

在get方法中增加设置服务器端和浏览器端的代码解析方式为utf-8

        response.setCharacterEncoding("utf-8");
        response.setContentType("text/html;charset=utf-8");
成功解决