使用ModelAndView和过滤器实现获取HTML请求的参数

需求：获取HTML的请求参数

类似：

实现思路：

1、利用过滤器拦截所有HTML请求

2、利用ModelAndView把参数保存起来

3、在HTML页面使用${key}把参数获取到

一、利用过滤器拦截所有HTML请求

web.xml配置：

    <!-- html -->
    <filter>
        <filter-name>html</filter-name>
        <filter-class>core.filter.HTML</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>html</filter-name>
        <url-pattern>*.html</url-pattern>
    </filter-mapping>

过滤器：

package core.filter;

import java.io.IOException;
import java.util.Enumeration;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


/**
 * 过滤所有HTML请求
 *
 */
public class HTML implements Filter {

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) request;
        HttpServletResponse res = (HttpServletResponse) response;
        req.setCharacterEncoding("UTF-8");
        res.setCharacterEncoding("UTF-8");
        res.setHeader( "Access-Control-Allow-Origin", "*" );
        String uri = backslashToSingle( req.getRequestURI() );
        String context = req.getContextPath();
        
        Enumeration enu = request.getParameterNames();
        StringBuffer params = new StringBuffer();
        while(enu.hasMoreElements()){
            String paraName = (String)enu.nextElement();
            params.append("&"+paraName+"="+request.getParameter(paraName));
        }
        
        //重定向
        if(uri.indexOf(".") != -1) {
            res.sendRedirect(context + "/html/go?pagepath=" + uri.substring(context.length()+1,uri.indexOf(".")) + params);
            return;
        }
        chain.doFilter(req, res);
    }
    
    @Override
    public void init(FilterConfig arg0) throws ServletException {
    }

    public void destroy() {
    }

    /**
     * 将路径中的连续斜杠转成单个的
     * @param strURL
     * @return
     */
    public static String backslashToSingle(String strURL){
        while ( strURL.indexOf( "//" ) != -1 ) {
            strURL = strURL.replace( "//", "/" );
        }
        if( strURL.indexOf( ":" ) != -1 ) {
            strURL = strURL.replace( ":", ":/" );
        }
        return strURL;
    }
}

HTML的controller类：

package module.api.controller;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;

import core.common.springmvc.BasicController;

/**
 * 往html界面中注入常用el属性
 */
@Controller
@RequestMapping("/html")
public class HTMLController extends BasicController {

    @RequestMapping("/go")
    @ResponseBody
    public ModelAndView go(HttpServletRequest request, String pagepath, String parameter) {
        ModelAndView modelAndView = new ModelAndView();
        String rootPath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort();
        String basePath = rootPath + request.getContextPath() + "/";
        rootPath += "/";
        String title = request.getParameter("name");
        modelAndView.setViewName(pagepath);
        modelAndView.addObject("rootPath", rootPath);
        modelAndView.addObject("basePath", basePath);
//        modelAndView.addObject("basePath", "http://183.203.223.224:82/taiyuan/");
        Object object = null;
        try {
            object = JSON.parse(parameter);
            if (!(object instanceof JSONObject)) {
                parameter = "{}";
            }
        } catch (Exception e) {
            parameter = "{}";
        }
        modelAndView.addObject("parameter", parameter);
        modelAndView.addObject("title", title == null ? "" : title);
        return modelAndView;
    }

    @RequestMapping("/readdata/go")
    @ResponseBody
    public ModelAndView readDataGo(HttpServletRequest request, String pagepath, String parameter, String interfacepath,
            String interfaceparameter) {
        ModelAndView modelAndView = new ModelAndView();
        String rootPath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort();
        String basePath = rootPath + request.getContextPath() + "/";
        rootPath += "/";
        String title = request.getParameter("name");
        modelAndView.setViewName(pagepath);
        modelAndView.addObject("rootPath", rootPath);
        modelAndView.addObject("basePath", basePath); 
//        modelAndView.addObject("basePath", "http://183.203.223.224:82/taiyuan/");
        Object object = null;
        try {
            object = JSON.parse(parameter);
            if (!(object instanceof JSONObject)) {
                parameter = "{}";
            }
        } catch (Exception e) {
            parameter = "{}";
        }
        modelAndView.addObject("parameter", parameter);
        modelAndView.addObject("title", title == null ? "" : title);
        return modelAndView;
    }
}

父类BasicController：

package core.common.springmvc;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.propertyeditors.CustomDateEditor;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import util.ResponseUtil;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;


public abstract class BasicController {

    protected Map<String, Object> result = new HashMap<String, Object>();
    protected boolean flag = false;
    protected String msg = "";
    protected String businessCode="";


    public String basePath() {
        HttpServletRequest request = request();
        String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + request.getContextPath();
        return basePath;
    }

    public String rootPath() {
        HttpServletRequest request = request();
        String rootPath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort();
        return rootPath;
    }

    public String cdnPath() {
        HttpServletRequest request = request();
        String cdnPath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + "/cdn";
        return cdnPath;
    }

    
    public void write(Integer total,List list,HttpServletResponse response) throws Exception{
        JSONObject result = new JSONObject();
        JSONArray jsonArray = new JSONArray( list );
        result.put("rows", jsonArray);
        result.put("total", total);
        ResponseUtil.write(response, result);
    }

    @InitBinder   
    public void initBinder(WebDataBinder binder) {
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");   
        dateFormat.setLenient(true);
        binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true));
    }

    public String findSessionId() {
        HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();
        String contextPath = request.getContextPath();
        return contextPath+request.getSession().getId();
    }

    public HttpServletRequest request() {
        HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();  
        return request;
    }
}

二、利用ModelAndView把参数保存起来

三、在HTML页面使用${key}把参数获取到

    var basePath = '${basePath}';
    var rootPath = '${rootPath}';
    var parameter = ${ parameter };

实现获取参数：

参考文章：

https://www.cnblogs.com/Sunnor/p/6130380.html

https://blog.csdn.net/ITBigGod/article/details/79685610

https://blog.csdn.net/qq_29569183/article/details/79282673

https://blog.csdn.net/qq_39592670/article/details/82466907

https://blog.csdn.net/qq_41995919/article/details/102944960