Java 如何使此代码使用 jQuery/Ajax 提交 UTF-8 表单 textarea 工作？

How can I make this code to submit a UTF-8 form textarea with jQuery/Ajax work?

提问by Sergio del Amo

I am having problems submitting forms which contain UTF-8 strings with Ajax. I am developing a Strutsweb application which runs in a Tomcatserver. This is the environment I set up to work with UTF-8:

我在使用 Ajax 提交包含 UTF-8 字符串的表单时遇到问题。我正在开发一个在Tomcat服务器中运行的StrutsWeb 应用程序。这是我为使用 UTF-8 而设置的环境：

• I have added the attributes URIEncoding="UTF-8" useBodyEncodingForURI="true"into the Connectortag to Tomcat's conf/server.xmlfile.

• I have a utf-8_general_cidatabase

• I am using the next filter to ensure my request and responses are encoded in UTF-8

  package filters;
  
  import java.io.IOException;
  import javax.servlet.*;
  
  public class UTF8Filter implements Filter {
      public void destroy() {}
  
      public void doFilter(ServletRequest request,ServletResponse response, FilterChain chain)
          throws IOException, ServletException {
          request.setCharacterEncoding("UTF-8");
          response.setContentType("text/html;charset=UTF-8");
          chain.doFilter(request, response);
      }
  
      public void init(FilterConfig filterConfig) throws ServletException {
      }
  }
  

• I use this filter in WEB-INF/web.xml

• I am using the next code for my JSON responses:

  public static void populateWithJSON(HttpServletResponse response,JSONObject json)
  {
     String CONTENT_TYPE="text/x-json;charset=UTF-8";
     response.setContentType(CONTENT_TYPE);
     response.setHeader("Cache-Control", "no-cache");
     try {
          response.getWriter().write(json.toString());
     } catch (IOException e) {
      throw new ApplicationException("Application Exception raised in RetrievedStories", e);
     }
  }
  

• 我已将属性添加到 Tomcat文件URIEncoding="UTF-8" useBodyEncodingForURI="true"的Connector标记中conf/server.xml。

• 我有一个utf-8_general_ci数据库

• 我正在使用下一个过滤器来确保我的请求和响应以 UTF-8 编码

  package filters;
  
  import java.io.IOException;
  import javax.servlet.*;
  
  public class UTF8Filter implements Filter {
      public void destroy() {}
  
      public void doFilter(ServletRequest request,ServletResponse response, FilterChain chain)
          throws IOException, ServletException {
          request.setCharacterEncoding("UTF-8");
          response.setContentType("text/html;charset=UTF-8");
          chain.doFilter(request, response);
      }
  
      public void init(FilterConfig filterConfig) throws ServletException {
      }
  }
  

• 我在 WEB-INF/web.xml 中使用这个过滤器

• 我正在为我的 JSON 响应使用下一个代码：

  public static void populateWithJSON(HttpServletResponse response,JSONObject json)
  {
     String CONTENT_TYPE="text/x-json;charset=UTF-8";
     response.setContentType(CONTENT_TYPE);
     response.setHeader("Cache-Control", "no-cache");
     try {
          response.getWriter().write(json.toString());
     } catch (IOException e) {
      throw new ApplicationException("Application Exception raised in RetrievedStories", e);
     }
  }
  

Everything seems to work fine (content coming from the database is displayed properly, and I am able to submit forms which are stored in UTF-8 in the database). The problem is that I am not able to submit forms with Ajax. I use jQuery, and I thought the problem was the lack of contentType field in the Ajax request. But I was wrong. I have a really simple form to submit comments which contains of an id and a body. The body field can be in different languages such as Spanish, German, or whatever.

一切似乎都正常（来自数据库的内容显示正确，我能够提交以 UTF-8 格式存储在数据库中的表单）。问题是我无法使用 Ajax 提交表单。我使用 jQuery，我认为问题是 Ajax 请求中缺少 contentType 字段。但是我错了。我有一个非常简单的表单来提交包含 id 和正文的评论。body 字段可以使用不同的语言，例如西班牙语、德语或其他语言。

If I submit my form with body textarea containing contrase?a, Firebugshows me:

如果我提交包含正文文本区域的表单contrase?a，Firebug 会向我显示：

Request Headers

• Hostlocalhost:8080
• Accept-CharsetISO-8859-1, utf-8;q=0.7;*q=0.7
• Content-Typeapplication/x-www-form-urlencoded; charset UTF-8

请求头

• 主机本地主机：8080
• Accept-CharsetISO-8859-1, utf-8;q=0.7;*q=0.7
• 内容类型应用程序/x-www-form-urlencoded；字符集 UTF-8

If I execute Copy Location with parametersin Firebug, the encoding seems already wrong:

如果我在 Firebug 中使用参数执行Copy Location，编码似乎已经错误：

http://localhost:8080/Cerepedia/corporate/postStoryComment.do?&body=contrase%C3%B1a&id=88

This is my jQuery code:

这是我的 jQuery 代码：

function addComment() {
    var comment_body = $("#postCommentForm textarea").val();
    var item_id = $("#postCommentForm input:hidden").val();
    var url = rooturl+"corporate/postStoryComment.do?";
    $.post(url, { id:  item_id, body: comment_body } ,
        function(data){
        /* Do stuff with the answer */
    }, "json");  }

A submission of a form with jQuery is causing the next error server side (note I am using Hibernate).

使用 jQuery 提交表单会导致下一个错误服务器端（注意我使用的是Hibernate）。

javax.servlet.ServletException: org.hibernate.exception.GenericJDBCException: Could not execute JDBC batch update
    at org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:520)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:427)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
    at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.cerebra.cerepedia.security.AuthorizationFilter.doFilter(AuthorizationFilter.java:78)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.cerebra.cerepedia.hibernate.HibernateSessionRequestFilter.doFilter(HibernateSessionRequestFilter.java:30)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at filters.UTF8Filter.doFilter(UTF8Filter.java:14)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Unknown Source)
Caused by: org.hibernate.exception.GenericJDBCException: Could not execute JDBC batch update
    at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
    at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:249)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:139)
    at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
    at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
    at com.cerebra.cerepedia.item.dao.ItemDAOHibernate.addComment(ItemDAOHibernate.java:505)
    at com.cerebra.cerepedia.item.ItemManagerPOJOImpl.addComment(ItemManagerPOJOImpl.java:164)
    at com.cerebra.cerepedia.struts.item.ItemAction.addComment(ItemAction.java:126)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:269)
    at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:170)
    at org.apache.struts.actions.MappingDispatchAction.execute(MappingDispatchAction.java:166)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
    ... 26 more
Caused by: java.sql.BatchUpdateException: Incorrect string value: '\xF1a' for column 'body' at row 1
    at com.mysql.jdbc.ServerPreparedStatement.executeBatch(ServerPreparedStatement.java:657)
    at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723)
    at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
    at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242)
    ... 44 more
26-ago-2008 19:54:48 org.apache.catalina.core.StandardWrapperValve invoke
GRAVE: Servlet.service() para servlet action lanzó excepción
java.sql.BatchUpdateException: Incorrect string value: '\xF1a' for column 'body' at row 1
    at com.mysql.jdbc.ServerPreparedStatement.executeBatch(ServerPreparedStatement.java:657)
    at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1723)
    at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
    at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:242)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:235)
    at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:139)
    at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
    at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
    at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
    at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
    at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
    at com.cerebra.cerepedia.item.dao.ItemDAOHibernate.addComment(ItemDAOHibernate.java:505)
    at com.cerebra.cerepedia.item.ItemManagerPOJOImpl.addComment(ItemManagerPOJOImpl.java:164)
    at com.cerebra.cerepedia.struts.item.ItemAction.addComment(ItemAction.java:126)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:269)
    at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:170)
    at org.apache.struts.actions.MappingDispatchAction.execute(MappingDispatchAction.java:166)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
    at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.cerebra.cerepedia.security.AuthorizationFilter.doFilter(AuthorizationFilter.java:78)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.cerebra.cerepedia.hibernate.HibernateSessionRequestFilter.doFilter(HibernateSessionRequestFilter.java:30)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at filters.UTF8Filter.doFilter(UTF8Filter.java:14)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Unknown Source)
javax.servlet.ServletException: java.lang.NumberFormatException: null
    at org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:520)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:427)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.cerebra.cerepedia.security.AuthorizationFilter.doFilter(AuthorizationFilter.java:78)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.cerebra.cerepedia.hibernate.HibernateSessionRequestFilter.doFilter(HibernateSessionRequestFilter.java:30)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at filters.UTF8Filter.doFilter(UTF8Filter.java:14)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NumberFormatException: null
    at java.lang.Long.parseLong(Unknown Source)
    at java.lang.Long.valueOf(Unknown Source)
    at com.cerebra.cerepedia.struts.item.ItemAction.addComment(ItemAction.java:120)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:269)
    at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:170)
    at org.apache.struts.actions.MappingDispatchAction.execute(MappingDispatchAction.java:166)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
    ... 26 more
26-ago-2008 20:13:25 org.apache.catalina.core.StandardWrapperValve invoke
GRAVE: Servlet.service() para servlet action lanzó excepción
java.lang.NumberFormatException: null
    at java.lang.Long.parseLong(Unknown Source)
    at java.lang.Long.valueOf(Unknown Source)
    at com.cerebra.cerepedia.struts.item.ItemAction.addComment(ItemAction.java:120)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:269)
    at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:170)
    at org.apache.struts.actions.MappingDispatchAction.execute(MappingDispatchAction.java:166)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
    at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.cerebra.cerepedia.security.AuthorizationFilter.doFilter(AuthorizationFilter.java:78)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.cerebra.cerepedia.hibernate.HibernateSessionRequestFilter.doFilter(HibernateSessionRequestFilter.java:30)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at filters.UTF8Filter.doFilter(UTF8Filter.java:14)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
    at java.lang.Thread.run(Unknown Source)

回答by Pat

have you tried adding the following before the call :

您是否尝试在通话前添加以下内容：

$.ajaxSetup({ 
    scriptCharset: "utf-8" , 
    contentType: "application/json; charset=utf-8"
});

The options are explained here.

此处解释了这些选项。

contentType : When sending data to the server, use this content-type. Default is "application/x-www-form-urlencoded", which is fine for most cases.

contentType ：向服务器发送数据时，使用此内容类型。默认为“application/x-www-form-urlencoded”，这在大多数情况下都适用。

scriptCharset : Only for requests with 'jsonp' or 'script' dataType and GET type. Forces the request to be interpreted as a certain charset. Only needed for charset differences between the remote and local content.

scriptCharset ：仅适用于具有“jsonp”或“script”数据类型和 GET 类型的请求。强制将请求解释为某个字符集。仅需要远程和本地内容之间的字符集差异。

回答by Anders B

I had the same problem and fixed it by downgrading to mysql-connector-odbc-3.51.16.

我遇到了同样的问题并通过降级到 mysql-connector-odbc-3.51.16 来修复它。

回答by Adnan

I had the same problem also and I fixed it in this way:

我也遇到了同样的问题，我以这种方式修复了它：

In PHP, before storing the data in the database, I used the htmlentities()function. And during showing the data, I used the html_entity_decode()function. This worked. I strongly hope this will work for you too.

在 PHP 中，在将数据存储到数据库之前，我使用了该htmlentities()函数。在显示数据的过程中，我使用了该html_entity_decode()功能。这奏效了。我强烈希望这对你也有用。

回答by Jesús Alonso

I'm having the same problem. I saw Internet Explorer 8 sends this header:

我有同样的问题。我看到 Internet Explorer 8 发送了这个标头：

content-type = application/x-www-form-urlencoded

while Firefox sends this:

而 Firefox 发送这个：

content-type = application/x-www-form-urlencoded; charset=UTF-8

My solution was just forcing in jQuery to use the Firefox content-type:

我的解决方案只是在 jQuery 中强制使用 Firefox 内容类型：

$.ajaxSetup({ scriptCharset: "utf-8" ,contentType: "application/x-www-form-urlencoded; charset=UTF-8" });

回答by Michael

I see this problem a lot. The meta doesn't work always in your PHP data operations, so just type this at the beginning:

我经常看到这个问题。元在您的 PHP 数据操作中并不总是有效，因此只需在开头输入：

<?php header('Content-type: text/html; charset=utf-8');  ?>

回答by Theofanis Pantelides

As the exception is a jdbc error, your best approach is to capture the input before it is sent to the database.

由于异常是 jdbc 错误，因此最好的方法是在将输入发送到数据库之前捕获输入。

java.sql.BatchUpdateException: Incorrect string value: '\xF1a' for column 'body' at row 1

java.sql.BatchUpdateException: 字符串值不正确：第 1 行的“body”列的“\xF1a”

A single character is causing the exception.

单个字符导致异常。

It may be the case that you will need to override some characters manually. You will find, when working with non-latin-alphabet languages (as I do), that this is a common pain.

在这种情况下，您可能需要手动覆盖某些字符。你会发现，在使用非拉丁字母语言时（就像我一样），这是一种常见的痛苦。