Java在web页面上的编码解码处理及中文URL乱码解决

protected void convertURI(MessageBytes uri, Request request) 
    throws Exception { 
     ByteChunk bc = uri.getByteChunk(); 
     int length = bc.getLength(); 
     CharChunk cc = uri.getCharChunk(); 
     cc.allocate(length, -1); 
     String enc = connector.getURIEncoding();  //获取URI解码集 
     if (enc != null) { 
      B2CConverter conv = request.getURIConverter(); 
      try { 
       if (conv == null) { 
        conv = new B2CConverter(enc); 
        request.setURIConverter(conv); 
       } 
      } catch (IOException e) {...} 
      if (conv != null) { 
       try { 
        conv.convert(bc, cc, cc.getBuffer().length - cc.getEnd()); 
        uri.setChars(cc.getBuffer(), cc.getStart(), cc.getLength()); 
        return; 
       } catch (IOException e) {...} 
      } 
     } 
     // Default encoding: fast conversion 
     byte[] bbuf = bc.getBuffer(); 
     char[] cbuf = cc.getBuffer(); 
     int start = bc.getStart(); 
     for (int i = 0; i < length; i++) { 
      cbuf[i] = (char) (bbuf[i + start] & 0xff); 
     } 
     uri.setChars(cbuf, 0, length); 
 } 

<Connector URIEncoding="utf-8" /> 

//获取编码 
 String enc = getCharacterEncoding(); 
 //获取ContentType 中定义的 Charset 
 boolean useBodyEncodingForURI = connector.getUseBodyEncodingForURI(); 
 if (enc != null) { //如果设置编码不为空，则设置编码为enc 
  parameters.setEncoding(enc); 
  if (useBodyEncodingForURI) { //如果设置了Chartset，则设置queryString的解码为ChartSet 
   parameters.setQueryStringEncoding(enc);  
  } 
 } else {  //设置默认解码方式 
  parameters.setEncoding(org.apache.coyote.Constants.DEFAULT_CHARACTER_ENCODING); 
  if (useBodyEncodingForURI) { 
   parameters.setQueryStringEncoding(org.apache.coyote.Constants.DEFAULT_CHARACTER_ENCODING); 
  } 
 } 

<Connector URIEncoding="UTF-8" useBodyEncodingForURI="true"/> 

var url = '<s:property value="webPath" />/ShowMoblieQRCode.servlet?name=我是cm'; 
window.location.href = encodeURI(url); 

String name = request.getParameter("name"); 
System.out.println("前台传入参数：" + name); 
name = new String(name.getBytes("ISO-8859-1"),"UTF-8"); 
System.out.println("经过解码后参数：" + name); 

var url = '<s:property value="webPath" />/ShowMoblieQRCode.servlet?name=我是cm'; 
window.location.href = encodeURI(encodeURI(url)); 

String name = request.getParameter("name"); 
System.out.println("前台传入参数：" + name); 
name = URLDecoder.decode(name,"UTF-8"); 
System.out.println("经过解码后参数：" + name); 

public class CharacterEncoding implements Filter { 
 
 private FilterConfig config ; 
 String encoding = null; 
  
 public void destroy() { 
  config = null; 
 } 
 
 public void doFilter(ServletRequest request, ServletResponse response, 
   FilterChain chain) throws IOException, ServletException { 
  request.setCharacterEncoding(encoding); 
  chain.doFilter(request, response); 
 } 
 
 public void init(FilterConfig config) throws ServletException { 
  this.config = config; 
  //获取配置参数 
  String str = config.getInitParameter("encoding"); 
  if(str!=null){ 
   encoding = str; 
  } 
 } 
 
} 

<!-- 中文过滤器的配置 --> 
 <filter> 
  <filter-name>chineseEncoding</filter-name> 
  <filter-class>com.test.filter.CharacterEncoding</filter-class> 
   
  <init-param> 
   <param-name>encoding</param-name> 
   <param-value>utf-8</param-value> 
  </init-param> 
 </filter> 
  
 <filter-mapping> 
  <filter-name>chineseEncoding</filter-name> 
  <url-pattern>/*</url-pattern> 
 </filter-mapping> 

public class CharacterEncoding implements Filter { 
 protected FilterConfig filterConfig ; 
 String encoding = null; 
  
 public void destroy() { 
  this.filterConfig = null; 
 } 
 
 /** 
  * 初始化 
  */ 
 public void init(FilterConfig filterConfig) { 
  this.filterConfig = filterConfig; 
 } 
 
 /** 
  * 将 inStr 转为 UTF-8 的编码形式 
  * 
  * @param inStr 输入字符串 
  * @return UTF - 8 的编码形式的字符串 
  * @throws UnsupportedEncodingException 
  */ 
 private String toUTF(String inStr) throws UnsupportedEncodingException { 
  String outStr = ""; 
  if (inStr != null) { 
   outStr = new String(inStr.getBytes("iso-8859-1"), "UTF-8"); 
  } 
  return outStr; 
 } 
 
 /** 
  * 中文乱码过滤处理 
  */ 
 public void doFilter(ServletRequest servletRequest, 
   ServletResponse servletResponse, FilterChain chain) throws IOException, 
   ServletException { 
  HttpServletRequest request = (HttpServletRequest) servletRequest; 
  HttpServletResponse response = (HttpServletResponse) servletResponse; 
 
  // 获得请求的方式 (1.post or 2.get), 根据不同请求方式进行不同处理 
  String method = request.getMethod(); 
  // 1. 以 post 方式提交的请求 , 直接设置编码为 UTF-8 
  if (method.equalsIgnoreCase("post")) { 
   try { 
    request.setCharacterEncoding("UTF-8"); 
   } catch (UnsupportedEncodingException e) { 
    e.printStackTrace(); 
   } 
  } 
  // 2. 以 get 方式提交的请求 
  else { 
   // 取出客户提交的参数集 
   Enumeration<String> paramNames = request.getParameterNames(); 
   // 遍历参数集取出每个参数的名称及值 
   while (paramNames.hasMoreElements()) { 
    String name = paramNames.nextElement(); // 取出参数名称 
    String values[] = request.getParameterValues(name); // 根据参数名称取出其值 
    // 如果参数值集不为空 
    if (values != null) { 
     // 遍历参数值集 
     for (int i = 0; i < values.length; i++) { 
      try { 
       // 回圈依次将每个值调用 toUTF(values[i]) 方法转换参数值的字元编码 
       String vlustr = toUTF(values[i]); 
       values[i] = vlustr; 
      } catch (UnsupportedEncodingException e) { 
       e.printStackTrace(); 
      } 
     } 
     // 将该值以属性的形式藏在 request 
     request.setAttribute(name, values); 
    } 
   } 
 
  } 
  // 设置响应方式和支持中文的字元集 
  response.setContentType("text/html;charset=UTF-8"); 
 
  // 继续执行下一个 filter, 无一下个 filter 则执行请求 
  chain.doFilter(request, response); 
 } 
} 
 

<!-- 中文过滤器的配置 --> 
 <filter> 
  <filter-name>chineseEncoding</filter-name> 
  <filter-class>com.test.filter.CharacterEncoding</filter-class> 
 </filter> 
  
 <filter-mapping> 
  <filter-name>chineseEncoding</filter-name> 
  <url-pattern>/*</url-pattern> 
 </filter-mapping> 

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