最近在做一個管理系統，使用的是 tomcat 7.077 芍锚，后臺使用 SSM 框架 Ajax 進行數據的交換昔园。因為前端發(fā)送過來的是 json 數據流而瀏覽器發(fā)送請求不會對符號進行轉義所以報錯

Note: further occurrences of HTTP header parsing errors will be logged at DEBUG level.
 java.lang.IllegalArgumentException: Invalid character found in the request target. The valid characters are defined in RFC 7230 and RFC 3986
        at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:472)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:683)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:745)

報錯的原因大概是傳輸 URL 中包含了非法字符，解決這個問題的方法有

• 1. 對 URL 進行轉義
     Ajax

  $.ajax({
              type:'GET',
              
              url:'http://192.168.6.74:8080/LabSystem/admins/testJson',
              
            data:{'username':encodeURI('哈哈'),'password':encodeURI('123456')},
             
              dataType:'jsonp',
              jsonp: "callback",
              
              contentType:'application/x-www-form-urlencoded;charset=UTF-8',
              async:true,
              cache:false,
              success:function(data){
              //擴展回調函數  
                alert(data),
                $('h2').text('成功回應跨域請求')
              },
              error:function(){
                //處理異常數據...
                alert("ERROR")
              }
        });
    })

ssm

@ResponseBody
    @RequestMapping(value="/testBean",method=RequestMethod.GET,produces="application/json;charset=UTF-8")
    public Object testMethod(String callback,
            @RequestParam("username") String username,@RequestParam("password")String password) throws Exception{
        
        URLDecoder.decode(username,"UTF-8");
        
        System.out.println(URLDecoder.decode(username,"UTF-8"));
        
        UserExample userExample =null;      
        
        List<User> user = userService.testBean(userExample);
        
        JSONPObject jsonpObject = new JSONPObject(callback,user) ;
        
        return jsonpObject;
    }

這樣的做法代碼將會十分贅余并炮，如果表單一次性提交多個數據這種處理是十分不適宜的默刚。既然問題出現在 tomcat 配置本身，那么就一定有相應的配置來解決這個問題逃魄。

• 2. 更改 tomcat 配置

打開 tomcat 安裝目錄 apache-tomcat-7.0.77\conf 找到 catalina.properties 在配置的最后兩行進行修改

#tomcat.util.http.parser.HttpParser.requestTargetAllow=|{}
org.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH=true

OK 這樣前端就可以順利向服務器發(fā)送 json 對象不報錯了

var users={'uUsername':'201600407085','uPassword':'123456'};                    
       $.ajax({
              type:'GET',           
              url:'http://192.168.6.74:8080/LabSystem/admins/testJson',                          
              data:JSON.stringify(users),
              dataType:'jsonp',
              jsonp: "callback",          
              contentType:'application/x-www-form-urlencoded;charset=UTF-8',
              async:true,
              cache:false,

ssm

@ResponseBody
@RequestMapping("/testJson")
    public Object toBean(String callback,@RequestBody User user){
        
        System.out.println(user.getuUsername());
        
        return 1;
    }

解決這個問題后原本贅余的代碼兩三行就搞定了簡直不要太爽 hhhhh