最近迁移老项目（JAVA_WEB)，由于老项目本身就是做的前后端分离；将老项目整改为新微服务，我想直接使用原来的前段页面；可是有一个问题，原来的页面ajax接口封装了一层，请求信息和现在借口不一致。于是有了这一篇
自定义HttpServletRequestWrapper处理参数：
package com.example.demo;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.JSONPath;
import org.springframework.util.CollectionUtils;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.nio.charset.Charset;
import java.util.*;
import java.util.stream.Collectors;
public class DemoHttpServletWrapper extends HttpServletRequestWrapper {
private Map params;
public DemoHttpServletWrapper(HttpServletRequest request) {
super(request);
String reqMessage = request.getParameter("req_message");
JSONObject json = JSONObject.parseObject(reqMessage);
Map eval = (Map) JSONPath.eval(json, "$.req_body");
if (CollectionUtils.isEmpty(eval)) {
params = new HashMap<>(0);
return;
}
this.params = eval;
}
@Override
public String getQueryString() {
String collect = this.params.entrySet().stream().map(x -> x.getKey() + "=" + x.getValue()).collect(Collectors.joining("&"));
System.out.println(collect);
return super.getQueryString();
}
@Override
public String getParameter(String name) {
return this.params.get(name) == null? null : this.params.get(name).toString();
}
@Override
public Map getParameterMap() {
return getMapParams();
}
@Override
public Enumeration getParameterNames() {
return Collections.enumeration(this.params.keySet());
}
@Override
public String[] getParameterValues(String name) {
return getMapParams().get(name);
}
@Override
public int getContentLength() {
return getByteLength();
}
@Override
public long getContentLengthLong() {
return getByteLength();
}
private byte[] getByte(){
return JSON.toJSONString(this.params).getBytes(Charset.forName("UTF-8"));
}
private int getByteLength(){
return getByte().length;
}
private Map getMapParams(){
Map map = new HashMap<>();
for (Map.Entry entry : this.params.entrySet()) {
String key = entry.getKey();
Object value = entry.getValue();
if (entry.getValue() instanceof String[]) {
map.put(key,(String[])value);
}else{
map.put(key,new String[]{value.toString()});
}
}
return map;
}
}
替换原有request
package com.example.demo;
import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
/**
* @author cyh
*/
@WebFilter(urlPatterns = "/*")
public class ChangeFilter implements Filter {
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
DemoHttpServletWrapper demoHttpServletWrapper = new DemoHttpServletWrapper((HttpServletRequest) servletRequest);
filterChain.doFilter(demoHttpServletWrapper,servletResponse);
}
}
开启servlet注解扫描
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.web.servlet.ServletComponentScan;
@SpringBootApplication
@ServletComponentScan(value = "com.example.demo")
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
控制层
package com.example.demo;
import com.alibaba.fastjson.JSON;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.Map;
@Controller
public class DemoControll {
@Autowired
private DemoService demoService;
@RequestMapping(value = "login")
@ResponseBody
public String login(@RequestParam Map map){
return JSON.toJSONString(map);
}
}
