SpringMVC第六篇——解决中文乱码(POST/GET提交)

SpringMVC中get和post中文乱码要分开解决：

POST提交：

只需要在web.xml中添加如下配置。post中文乱码就解决了。

拦截规则根据自己需求

<filter>
<filter-name>encoding</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

GET提交：

1：乱码的地方使用进行重新编码

String param = new String(param.getBytes("ISO8859-1"), "UTF-8");

2：在Tomcat的 服务配置文件server.xml里面加上配置

<Connector port="8080" protocol="HTTP/1.1"
connectionTimeout="20000"
redirectPort="8443" URIEncoding="UTF-8"/>

第二种是改了服务器配置，第一种操作繁琐。

推荐使用：

3：自定义拦截器，使用动态代理：

package controller;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Method;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.cglib.proxy.InvocationHandler;
import org.springframework.cglib.proxy.Proxy;
import org.springframework.web.filter.OncePerRequestFilter;

public class EncodingFilter extends OncePerRequestFilter {
private String encoding;

public void setEncoding(String encoding) {
this.encoding = encoding;
}

@Override
protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
throws ServletExce
b0f2
ption, IOException {
// 设置请求响应字符编码
request.setCharacterEncoding(encoding);
response.setCharacterEncoding(encoding);

// 传递给目标servlet或jsp的实际上是动态代理的对象，而不是原始的HttpServletRequest对象
if("POST".equals(request.getMethod())){
//如果是post提交直接放行。
chain.doFilter(request, response);

}else{
//get提交进行处理
request = (HttpServletRequest) Proxy.newProxyInstance(request.getClass().getClassLoader(), request.getClass().getInterfaces(), new MyInvacationHandler(request));
chain.doFilter(request, response);
}
}

class MyInvacationHandler implements InvocationHandler{
private HttpServletRequest request;
MyInvacationHandler(HttpServletRequest request){
this.request=request;
}

@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
/*if("POST".equals(request.getMethod())){
return value;
}*/

switch (method.getName()) {
case "getParameter":
String value = request.getParameter((String)args[0]);
try {
if(value != null){
value=new String(value.getBytes("ISO-8859-1"),encoding);
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return value;
case "getParameterValues":
String[] values = request.getParameterValues((String)args[0]);
if (values != null) {
for (int i = 0; i < values.length; i++) {
try {
values[i] = new String(values[i].getBytes("ISO-8859-1"),encoding);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
}
return values;
default:
return method.invoke(request, args);
}
}

}

}

web.xml配置文件中

<filter-name>encodingFilter</filter-name>
<filter-class>controller.EncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

至此springmvc中的提交乱码全部都解决。

在spring中，filter都默认继承OncePerRequestFilter

返回 SpringMVC的学习笔记目录

http://blog.csdn.net/m15517986455/article/details/79319601