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数据库使用JDBC插入数据之后一直中文乱码

2

数据库

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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在IDEA中maven框架中pom.xml文件怎么调整版本冲突?

3

2

class="cursor-pointer"> 详细描述

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SSM resultful接口 post body中from-data提交

2

SSM rest

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 源码

springmvc-servlet.xml
<context:component-scan base-package="com.controller"/>
<mvc:annotation-driven/>

<bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/><!--设置JSP文件的目录位置-->
<property name="suffix" value=".jsp"/>
</bean>

web.xml

<display-name>Archetype Created Web Application</display-name>

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>


<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>

<filter>
<filter-name>HiddenHttpMethodFilter</filter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
<init-param>
<param-name>methodParam</param-name>
<param-value>_method</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/springmvc-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>

</servlet-mapping>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

Controller
@Autowired
private UserService userService;

@RequestMapping(value = "/user", method = RequestMethod.POST)
public ModelAndView addUser( ModelAndView modelAndView,User user) {
System.out.println(user.toString());
userService.addUser(user);
modelAndView.addObject("user", user);
modelAndView.setViewName("showUser");
return modelAndView;
}

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报错:JSPs only permit GET, POST or HEAD

2

SSM

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

//插入数据
    @RequestMapping(value = "/add", method = RequestMethod.PUT)
    public String addUser(Model model, @Validated(value = ValidationInsert.class) UserCustom userCustom, BindingResult bindingResult) throws Exception {
        /* 效验输入信息 */
        if (bindingResult.hasErrors()) {
            //输出错误信息
            List<ObjectError> allErrors = bindingResult.getAllErrors();
            for (ObjectError objectError : allErrors) {
                //输出错误信息
                logger.error(objectError.getDefaultMessage());
            }
            //将错误传到页面
            model.addAttribute("allErrors", allErrors);
            //数据回显
            model.addAttribute("userEcho", userCustom);
            //出错之后要跳转的页面
            return "forward:/rest/list";
        }
        userService.insertUser(userCustom);
        model.addAttribute("userCustomList", userCustom);
        return "redirect:/rest/list";
    }

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SSM框架下页面跳转为什么失败？

0

2

SSM

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

controller部分：
@Controller
@RequestMapping("/paper")
public class PaperController {
    @Autowired
    private PaperService paperService;

    @RequestMapping("/allPaper")
    public String list(Model model) {
        List<Paper> list = paperService.queryAllPaper();
        model.addAttribute("list", list);
        return "allPaper";
    }

    @RequestMapping("toAddPaper")
    public String toAddPaper() {
        return "addPaper";
    }

    @RequestMapping("/addPaper")
    public String addPaper(Paper paper) {
        paperService.addPaper(paper);
        return "redirect:/paper/allPaper";
    }

    @RequestMapping("/del/{paperId}")
    public String deletePaper(@PathVariable("paperId") Long id) {
        paperService.deletePaperById(id);
        return "redirect:/paper/allPaper";
    }

    @RequestMapping("toUpdatePaper")
    public String toUpdatePaper(Model model, Long id) {
        model.addAttribute("paper", paperService.queryById(id));
        return "updatePaper";
    }

    @RequestMapping("/updatePaper")
    public String updatePaper(Model model, Paper paper) {
        paperService.updatePaper(paper);
        paper = paperService.queryById(paper.getPaperId());
        model.addAttribute("paper", paper);
        return "redirect:/paper/allPaper";
    }
}

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使用统计脚本统计nginx访问延时出问题

1

2

Nginx

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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反向代理问题

3

2

Nginx

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

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Resin 项目启动报@WebServlet问题（JettyHttpHand…）

1

2

resin

class="cursor-pointer"> 详细描述

具体ERROR：

500 Servlet Exception

Annotation @WebServlet at 'org.springframework.http.server.reactive.JettyHttpHandlerAdapter'
must specify either value or urlPatterns

发布的时候提示的问题，提示需要配置url，但是项目里没有使用这个，而且定位不到具体位置，log里也是同样的错误：

jvm-app log：

[18-05-16 09:23:04.197] {resin-59} WebApp[production/webapp/default/ROOT,STARTING] Initializing Spring root WebApplicationContext
2018-05-16 09:23:04 [INFO]-[org.springframework.web.context.ContextLoader] Root WebApplicationContext: initialization started
  2018-05-16 09:23:04 [INFO]-[org.springframework.web.context.support.XmlWebApplicationContext] Refreshing Root WebApplicationContext: startup date [Wed May 16 09:23:04 CST 2018]; root of context hierarchy
  2018-05-16 09:23:04 [INFO]-[org.springframework.beans.factory.xml.XmlBeanDefinitionReader] Loading XML bean definitions from class path resource [springmybatis.xml]
  2018-05-16 09:23:04 [INFO]-[org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor] JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
  2018-05-16 09:23:04 [INFO]-[com.mchange.v2.log.MLog] MLog clients using log4j logging.
  2018-05-16 09:23:04 [INFO]-[com.mchange.v2.c3p0.C3P0Registry] Initializing c3p0-0.9.5.2 [built 08-December-2015 22:06:04 -0800; debug? true; trace: 10]
  Logging initialized using 'class org.apache.ibatis.logging.stdout.StdOutImpl' adapter.
2018-05-16 09:23:05 [INFO]-[org.springframework.web.context.ContextLoader] Root WebApplicationContext: initialization completed in 1495 ms
  [18-05-16 09:23:05.700] {resin-59} WebApp[production/webapp/default/ROOT] fail
[18-05-16 09:23:05.700] {resin-79} Annotation @WebServlet at 'org.springframework.http.server.reactive.JettyHttpHandlerAdapter' must specify either value or urlPatterns

class="cursor-pointer"> 错误截图

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Springboot整合redis出错。NOAUTH Authenticatio

1

2

springboot

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

该问题已被官方收录

SpringRMI配置客户端时一直报空指针

2

springRMI 分布式

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

class="cursor-pointer"> 源码

public class RMIClient {


     ESService eSService;

     JIService jiService;

     SNService snService;

     UserService userService;

    public void setJiService(JIService jiService) {
        this.jiService = jiService;
    }

    public void setSnService(SNService snService) {
        this.snService = snService;
    }

    public void setUserService(UserService userService) {
        this.userService = userService;
    }


    public void setEsService(ESService eSService) {
        this.eSService = eSService;
    }


    public ESService geteSService() {
        return eSService;
    }

    public JIService getJiService() {
        return jiService;
    }

    public SNService getSnService() {
        return snService;
    }

    public UserService getUserService() {
        return userService;
    }

    public static RMIClient server() {

        ApplicationContext context;

        RMIClient rmiClient = new RMIClient();

        int i = Math.random() > 0.5 ? 1 : 0;
        String a = "ServerA";
        String b = "ServerB";
        String name[] = {a, b};
        Redis redis = new Redis();
        String serverName = name[i];
        String another = name[1 - i];
        System.out.println("选择服务器名称" + serverName);
        if (redis.getCacheObject(serverName) == null) {
            System.out.println(serverName + "服务器异常，重新选择服务器名称" + another);
            if (redis.getCacheObject(another) == null) {
                System.out.println("服务器都坏了");
            } else {
                context = new ClassPathXmlApplicationContext(another + ".xml");
                rmiClient = (RMIClient) context.getBean("rmiClient");
                rmiClient.run();
            }
        } else {
            context = new ClassPathXmlApplicationContext(serverName + ".xml");
            rmiClient = (RMIClient) context.getBean("rmiClient");
            rmiClient.run();

        }
        return rmiClient;
    }