解决方法：

   我只改了nginx.conf中的两个配置项的值，内容如下：

原来的配置：

location ~ (\.jsp)|(\.do)$ {
        
            proxy_pass http://tomcatserver;
            proxy_redirect off;  
            proxy_set_header HOST $host;  
            proxy_set_header X-Real-IP $remote_addr;  
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;  
            client_max_body_size 10m;    修改这行
            client_body_buffer_size 128k;   修改这行
            proxy_connect_timeout 90;  
            proxy_send_timeout 90;  
            proxy_read_timeout 90;  
            proxy_buffer_size 4k;  
            proxy_buffers 4 32k;  
            proxy_busy_buffers_size 64k;  
            proxy_temp_file_write_size 64k;  
        }

修改为：

##所以jsp、do的动态请求都交给后面的tomcat处理

location ~ (.jsp)|(.do)$ {

    proxy_pass http://tomcatserver;
    proxy_redirect off ; 
    proxy_set_header Host $host; 
    proxy_set_header X-Real-IP $remote_addr; 
    proxy_set_header REMOTE-HOST $remote_addr; 
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; 
    client_max_body_size 50m; 
    client_body_buffer_size 256k; 
    proxy_connect_timeout 1; 
    proxy_send_timeout 30; 
    proxy_read_timeout 60; 
    proxy_buffer_size 256k; 
    proxy_buffers 4 256k; 
    proxy_busy_buffers_size 256k; 
    proxy_temp_file_write_size 256k; 
    proxy_next_upstream error timeout invalid_header http_500 http_503 http_404; 
    proxy_max_temp_file_size 128m; 

}