JQuery. Ajax

JQuery ajax garbled Problem Solution

I. Test Environment
JQuery: 1.3.2
Tomcat: 5.5.17

Ii. Test Methods

1. Use the get Method

Server code:
String name = new String (request. getParameter ("name"). getBytes ("iso8859-1"), "UTF-8 ");

Client js Code:
<1> $. ajax ({url: "2.jsp", type:" get ", data: {name:" Chinese "}, success: function (response ){
       Alert (response );

}});

Result: displayed correctly.

<2> $. ajax ({url: "2.jsp", type:" get ", data:" name = Chinese ", success: function (response ){
       Alert (response );

}});
Result: Garbled

<3> $. get ("2.jsp", {name:" Chinese "}, function (response ){
   Alert (response );

});

Result: displayed correctly.

<4> $. get ("2.jsp"," name = Chinese ", function (response ){
   Alert (response );

});

Result: Garbled

2. post Method

Server code:
Request. setCharacterEncoding ("UTF-8 "); 
String name = request. getParameter ("name ");

Client js Code:
<1> $. ajax ({url: "3.jsp", type:" post ", data:" method = testAjaxPost & name = Chinese ", success: function (response ){
   Alert (response );

}});

Result: displayed correctly.

<2> $. ajax ({url: "3.jsp", type:" post ", data: {name:" Chinese "}, success: function (response ){
   Alert (response );

}});

Result: displayed correctly.

<3> $. post ("3.jsp", {name:" Chinese "}, function (response ){
   Alert (response );

});

Result: displayed correctly.

<4> $. post ("3.jsp"," name = Chinese ", function (response ){
   Alert (response );

});

Result: displayed correctly.

3. Use filter

Public void doFilter (ServletRequest request, ServletResponse response,
       FilterChain chain) throws IOException, ServletException {
   HttpServletRequest req = (HttpServletRequest) request;
   If (req. getHeader ("X-Requested-")! = Null & req. getHeader ("X-Requested-With"). inclusignorecase ("XMLHttpRequest ")){
       Request. setCharacterEncoding ("UTF-8 ");
   } Else {
       Request. setCharacterEncoding ("gbk ");
   }
   Chain. doFilter (request, response );
}

When using ajax, jQuery will add X-Requested-With to the header. The value is XMLHttpRequest. When the filter judges that it is a jQuery ajax request, it sets the character encoding to utf8, this solves the problem of garbled Chinese Characters in post submission, and does not need to set request in the code. setCharacterEncoding ("UTF-8 ");

For Chinese garbled characters in get mode, we recommend that you do not submit Chinese Characters in get mode, and change all to post ^-^.

 

To be consistent with the way prototype. js processes Chinese, you can use the following method to customize the attribute RequestType $. ajax ({
      Url: "3.jsp ",
      Type: "post ",
      Data: {name: "Chinese "},
      BeforeSend: function (XMLHttpRequest ){
              XMLHttpRequest. setRequestHeader ("RequestType", "ajax ");
              Alert ("START ");
      },
      Success: function (data, textStatus ){
              Alert (data );
      },
      Error: function (XMLHttpRequest, textStatus, errorThrown ){
              Alert ("error:" + textStatus );
      },
      Complete: function (XMLHttpRequest, textStatus ){
              Alert ("Finished:" + textStatus );
      }
  }); The filter code is as follows:
Public void doFilter (ServletRequest request, ServletResponse response,
              FilterChain chain) throws IOException, ServletException {
      HttpServletRequest req = (HttpServletRequest) request;
      If (req. getHeader ("RequestType ")! = Null & req. getHeader ("RequestType"). inclusignorecase ("ajax "))){
              Request. setCharacterEncoding ("UTF-8 ");
      } Else {
              Request. setCharacterEncoding ("gbk ");
      }
      Chain. doFilter (request, response );
}