解决乱码，配置过滤器
package edu.sdkd.utils;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
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;
public class ProFilter implements Filter {
protected FilterConfig filterConfig;
/**
*
* 初始化
*/
public void init(FilterConfig filterConfig) throws ServletException {
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=java.net.URLDecoder.decode(inStr);//不用decode了,到这的时候就已经自动decode过了
// 将字符串转为UTF-8编码形式
outStr = new String(inStr.getBytes("iso-8859-1"), "UTF-8");
}
return outStr;
}
/**
*
* 中文乱码过滤处理
*/
public void doFilter(ServletRequest svlrequest, ServletResponse svlresponse,
FilterChain chain) throws IOException, ServletException
{
// 将Servlet请求与响应对象转换成HttpServlet请求与响应对象
HttpServletRequest request = (HttpServletRequest) svlrequest;
HttpServletResponse response = (HttpServletResponse) svlresponse;
// 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)
{
// 如果参数值集中只有一个值
if (values.length == 1)
{
try
{
// 调用toUTF(values[0])函数,(values[0]即第一个参数值)方法转换参数值的字元编码
String vlustr = toUTF(values[0]);
// 并将该值以属性的形式藏在request
request.setAttribute(name, vlustr);
} catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}
}
// 如果参数值集中有多个值
else
{
// 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);
}
/**
*
* 销毁方法
*/
public void destroy()
{
}
}
<!-- 配置过滤器 -->
<filter>
<description>处理中文乱码过滤器</description>
<filter-name>ProFilter</filter-name>
<filter-class>edu.sdkd.utils.ProFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>ProFilter</filter-name>
<url-pattern>*</url-pattern><!-- 过滤所有请求，注：tomcat5请用/* -->
</filter-mapping>
-----------------------------加密-------------------------------------
package edu.sdkd.utils;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import sun.misc.BASE64Encoder;
public class EncryptionUtils {
public static String md5(String message) {
try {
MessageDigest mdDigest = MessageDigest.getInstance("md5");
byte[] md5 = mdDigest.digest(message.getBytes());
BASE64Encoder encoder = new BASE64Encoder();
return encoder.encode(md5);
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
}
}