spring boot 通过过滤器修改request中的body参数

1。先使用Wrapper,重写HttpServletRequestWrapper。

package com.cepht.platform.icl.config;

import java.util.Enumeration;
import java.util.Map;
import java.util.Vector;


import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;


@SuppressWarnings("unchecked")
public class ParameterRequestWrapper extends HttpServletRequestWrapper
{
    
    private Map params;
    
    public ParameterRequestWrapper(HttpServletRequest request, Map newParams)
    {
        super(request);
        this.params = newParams;
    }
    
    public Map getParameterMap()
    {
        return params;
    }
    
    public Enumeration getParameterNames()
    {
        Vector l = new Vector(params.keySet());
        return l.elements();
    }
    
    public String[] getParameterValues(String name)
    {
        Object v = params.get(name);
        if (v == null)
        {
            return null;
        }
        else if (v instanceof String[])
        {
            return (String[])v;
        }
        else if (v instanceof String)
        {
            return new String[] {(String)v};
        }
        else
        {
            return new String[] {v.toString()};
        }
    }
    
    public String getParameter(String name)
    {
        Object v = params.get(name);
        if (v == null)
        {
            return null;
        }
        else if (v instanceof String[])
        {
            String[] strArr = (String[])v;
            if (strArr.length > 0)
            {
                return strArr[0];
            }
            else
            {
                return null;
            }
        }
        else if (v instanceof String)
        {
            return (String)v;
        }
        else
        {
            return v.toString();
        }
    }

}

2.在filter中修改request的body参数

package com.cepht.platform.icl.config;


import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;


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.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;


import com.cepht.platform.common.control.icl_PlatFormBaseObject;


@Component
@WebFilter(filterName = "Ilc_filter", urlPatterns = "/*")
public class Ilc_filter extends icl_PlatFormBaseObject implements Filter {


@SuppressWarnings("unused")
private Logger logger = LoggerFactory.getLogger(Ilc_filter.class);


@Override
public void init(FilterConfig filterConfig) throws ServletException {
}


@Override
public void doFilter(ServletRequest srequest, ServletResponse sresponse, FilterChain filterChain)
throws IOException, ServletException {


HttpServletRequest request = (HttpServletRequest) srequest;
HttpServletResponse response = (HttpServletResponse) sresponse;
// 访问地址
String uri = request.getRequestURI();
if ("/patrolwork/addWork".equals(uri) || "/patrolwork/updateWork".equals(uri)) {
String token = request.getParameter("token");
if (token == null) {
HashMap m = new HashMap(request.getParameterMap());
m.put("token", new String[] { String.valueOf(getUserId()) });
HttpServletRequest req = (HttpServletRequest) request;
ParameterRequestWrapper wrapRequest = new ParameterRequestWrapper(req, m);
request.getParameterMap();
request = wrapRequest;
}
}

filterChain.doFilter(request, sresponse);
}


@Override
public void destroy() {


}


}