txcixin 2015-01-28 18:23 采纳率: 100%
浏览 1814
已采纳

新手请问servlet不能在前端显示全部字符串的问题

servlet查询代码如下

public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html");
        ServletOutputStream out=response.getOutputStream();
        String stnm=request.getParameter("stnm");
        try {
            Statement stat = conn.createStatement();
            ResultSet rs = stat.executeQuery("select * from qstation where stnm ='"+stnm+"'");
            while (rs.next()) {
                ResultSetMetaData   rsmd1 = rs.getMetaData();
                int   count = rsmd1.getColumnCount();
                String all="";
                for (int i =1; i < count+1; i++) {
                    all=all+rs.getString(i)+",";
                }
                System.out.println(all);
                out.println(all);
            }
        } catch (Exception e) {
            // TODO: handle exception
        }

    }

system.out.println打印的消息是：
58238,320101,null,060602,南京,11880.0,3200.0,1,125.0,null,苏,南京市,南京市辖区,长江流域,中下游区,长江下游,101190101,华东电网,江苏,1,01,01,2,2,1,220101,

但是前台页面只显示：58238,320101,null,060602,
请问这是什么问题？

  • 写回答

3条回答 默认 最新

  • 聪明的一休丶 2015-01-29 05:17
    关注

    package com.rss.web;

    import java.io.IOException;

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

    public class TestServlet extends HttpServlet{
    /**
    *
    */
    private static final long serialVersionUID = 1L;
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
    throws ServletException, IOException {
    doPost(req, resp);
    }
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
    throws ServletException, IOException {
    resp.setContentType("text/html");
    String all="58238,320101,null,060602,南京,11880.0,3200.0,1,125.0,null,苏,南京市,南京市辖区,长江流域,中下游区,长江下游,101190101,华东电网,江苏,1,01,01,2,2,1,220101,";
    System.out.println(all);
    req.setAttribute("testServlet", all);

    req.getRequestDispatcher("/testServlet.jsp").forward(req, resp); 

    }

    }

    web.xml

    testServlet
    com.rss.web.TestServlet


    testServlet
    /test.do

    test.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"%>

    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">


    My JSP 'testServlet.jsp' starting page



    '${testServlet }'

    页面结果

    ![图片说明](https://img-ask.csdn.net/upload/201501/29/1422508578_590926.png)
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
查看更多回答(2条)

报告相同问题？

悬赏问题

  • ¥15 C++ 头文件/宏冲突问题解决
  • ¥15 用comsol模拟大气湍流通过底部加热（温度不同）的腔体
  • ¥50 安卓adb backup备份子用户应用数据失败
  • ¥20 有人能用聚类分析帮我分析一下文本内容嘛
  • ¥15 请问Lammps做复合材料拉伸模拟，应力应变曲线问题
  • ¥30 python代码，帮调试
  • ¥15 #MATLAB仿真#车辆换道路径规划
  • ¥15 java 操作 elasticsearch 8.1 实现 索引的重建
  • ¥15 数据可视化Python
  • ¥15 要给毕业设计添加扫码登录的功能！！有偿