Spring框架，如何返回数据给视图(jsp文件)

时间：2023-03-09 22:54:34
Spring框架，如何返回数据给视图(jsp文件)

第一步 准备返回给视图的数据

package com.cwebs.samples;  

import java.util.LinkedHashMap;

import java.util.List;

import java.util.Map;  

import javax.portlet.ActionResponse;

import javax.portlet.RenderRequest;

import javax.portlet.RenderResponse;  

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.portlet.ModelAndView;  

import com.cwebs.common.CMySQL;

import com.cwebs.common.ConnectionInfo;  

@Controller

@RequestMapping("VIEW")

public class QueryBySQLViewController {

    public ConnectionInfo ci = new ConnectionInfo(

            "jdbc:mysql://localhost:3366/test", "root", "root");      

    @RequestMapping

    public ModelAndView renderEditView(RenderRequest request,

            RenderResponse response) throws Exception {

        List<Map<String,String>> list=null;

        try {

            //step1:test open&close

            CMySQL db = new CMySQL(ci.connStr, ci.usr, ci.pwd);  

            //step2:test query with return

            list=db.executeQuery("select * from babywatch");

            db.testResult(list);          

        }catch(Exception ex)

        {

            ex.printStackTrace();

        }  

        final Map<String, Object> model = new LinkedHashMap<String, Object>();

        model.put("resultList", list);

        model.put("title", "测试表格");  

        return new ModelAndView("SQLQueryResult", model);

    }

}

　　第二步 在视图中显示

<%@page contentType="text/html;charset=utf-8" pageEncoding="utf-8"%>

<%@ include file="/WEB-INF/jsp/include.jsp" %>  

<!-- View Mode -->  

<h2>${title}</h2>  

<c:choose>

    <c:when test="${empty resultList}">

        <p>没有记录</p>

    </c:when>

    <c:otherwise>

        <table>

         <tr>

          <th>ID</th><th>名字</th><th>发布日期</th>

         </tr>

        <c:forEach var="result" items="${resultList}">

         <tr>

          <td>${result.BABYWATCH_ID}</td>

          <td>${result.BABYWATCH_NAME}</td>

          <td>${result.BABYWATCH_PUBLISHDATE}</td>

         </tr>

        </c:forEach>

        </table>

    </c:otherwise>

</c:choose>  

<h2>Portlet URLs</h2>

<ul>

    <li><a href="<portlet:renderURL portletMode="view" />">View Mode</a>

    <li><a href="<portlet:renderURL portletMode="edit" />">Edit Mode</a>

    <li><a href="<portlet:renderURL portletMode="help" />">Help Mode</a>

    <li><a href="<portlet:renderURL windowState="normal" />">Normal State</a>

    <li><a href="<portlet:renderURL windowState="maximized" />">Maximized State</a>

    <li><a href="<portlet:renderURL windowState="minimized" />">Minimized State</a>

</ul>

　　上例在视图中显示了一个简单的表格。

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