//查看有哪些开机执行的服务
[root@localhost /]# chkconfig --list

#!/bin/sh
#
# chkconfig:   - 85 15

case "$1" in
    start)
        ......
        ;;
    stop)
        ......
        ;;
    *)
        echo $"Usage: $0 {start|stop}"
        exit 2
esac

//移动文件
[root@localhost /]# mv shellname /etc/init.d/shellname

//给予权限
[root@localhost /]# chmod 755 /etc/init.d/shellname

//把自定义的shellname脚本加入chkconfig服务
[root@localhost /]# chkconfig --add shellname

//开启默认等级的chkconfig服务
[root@localhost /]# chkconfig shellname on

//开启指定等级的chkconfig服务
[root@localhost /]# chkconfig --level 2345 shellname on

[root@localhost /]# service shellname start

//新建一个空的Form对象
var form1 = new FormData();
//通过读取一个已经存在的Form标签来新建对象
var form2 = new FormData(document.getElementById("formId"));

//添加某个名为key的字段
form1.append("key","value");
//取出文件添加入file字段
form1.append("file",$('#file').files[0]);

//错误的方式
var key1 = form1.key
//正确的方式
var key2 = form1.get("key")

 $.ajax("url",
      {
        type: 'POST',
        data: form1,
        processData: false, //不对数据进行处理
        contentType: false  //不对Content-type进行处理
      }
).done(function(res) { }).fail(function(res) {});

XMLHttpRequest cannot load http://localhost:8080/all. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.

public static void setJSONResponse(HttpServletResponse response) {

  try {
    response.setContentType("application/json;charset=UTF-8");
    response.setHeader("Access-Control-Allow-Origin", "*");
    ....
  } catch (IOException e) {
    ....
  }
}

public class CrossDominFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

        ((HttpServletResponse) response).addHeader(
                "Access-Control-Allow-Origin", "*"
        );
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {

    }
}

<!--跨域开启过滤器-->
<filter>
    <filter-name>crossDominFilter</filter-name>
    <filter-class>com.company.web.CrossDominFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>crossDominFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

public class CrossDominFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

        ((HttpServletResponse) response).addHeader(
                "Access-Control-Allow-Origin", "http://localhost:63342"
        );
        ((HttpServletResponse) response).addHeader(
                "Access-Control-Allow-Credentials", "true"
        );
        chain.doFilter(request, response);
    }

    @Override
    public void destroy() {

    }
}

$.ajax(Constant.LOGIN_SIGN_IN, {
    type: "POST",
    data: {verifycode:test},
    success: function (response) {
      ....
    },
    crossDomain: true,
    xhrFields: {withCredentials: true}
});

---main
    ---java
    ---resource
    ---webapp
---WEB-INF
    ---web.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>person.test</groupId>
    <artifactId>spring</artifactId>
    <version>1.0</version>


</project>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
 metadata-complete="false"
 version="3.1">


</web-app>

<project ...>

    .....

    <packaging>war</packaging> <==该模块打包成war包即WebApp的程序

    <build>
      <finalName>spring</finalName>  <==最后程序名叫spring
    </build>

</project>

<project ...>

    ....

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.3.RELEASE</version>
        </dependency>
    </dependencies>

</project>

<servlet>
    <servlet-name>springMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
<param-name>contextConfigLocation</param-name><==配置文件
<param-value>classpath:spring-mvc.xml</param-value>
    </init-param>
</servlet>

<servlet-mapping>
    <servlet-name>springMVC</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

<context-param>
    <param-name>contextConfigLocation</param-name>       <==配置文件
    <param-value>classpath:applicationContext.xml</param-value>
</context-param>


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

<beans ......>
    <mvc:default-servlet-handler/>   <==让SpringMVC作为默认的Servlet处理器
    <mvc:annotation-driven/>         <==让SpringMVC使用注解驱动，即可用RequestMap一类的注解
    <context:component-scan base-package="person.zhuojia.learn.spring"/>    <==让SpringMVC的Java文件基础包名

</beans>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd">


</beans>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>${mysql.version}</version>
</dependency>
<dependency>
    <groupId>commons-dbcp</groupId>
    <artifactId>commons-dbcp</artifactId>
    <version>${dbcp.version}</version>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>${mybatis.version}</version>
</dependency>
<dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>${mybatis-spring.version}</version>
</dependency>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql://127.0.0.1:3306/psas?useUnicode=true&characterEncoding=utf8"/>
    <property name="username" value="root"/>
    <property name="password" value="root"/>
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="mapperLocations">
        <list>
            <value>classpath:*Mapper.xml</value>
        </list>
    </property>
</bean>

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="person.zhuojia.learn.spring.dal"/>
    <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>

var markupStr = $('#summernote').summernote('code');

<p>测试</p><p>图片</p><p><br></p>

$('#summernote').summernote('code', markupStr);

<context-param>
    <param-name>defaultHtmlEscape</param-name>
    <param-value>true</param-value>
</context-param>

<spring:htmlEscape defaultHtmlEscape="true" />

<form:input path="someFormField" htmlEscape="true" />
或
<form:form htmlEscape="true">

$.ajax("http://127.0.0.1:8080").done(function(){
  console.log("done")  //只会被Response的200触发
}).fail(function(){
  console.log("fail")  //4xx,5xx都会触发，其它不清楚
}).always(function () {
  console.log("always")//总会触发相当于Java的finally
})
}

var a = [4,5,6]
var b = [7,8,9]

a.push(b) //this指针指向a，b数组作为一个参数传入

//a代替了this指针，并且b作为 参数列表arguments 传入，而不是将数组仅作为一个参数
Array.prototype.push.apply(a, b)

var a = [1,2], b = [3,4]
var c = a.concat(b)

var a = [4,5,6]
var b = [7,8,9]

Array.prototype.push.apply(a, b)

console.log(a) // is: [4, 5, 6, 7, 8, 9]

a.push(b)

console.log(a) // is [4,5,6,[7,8,9]]

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.8.3</version>
</dependency>

public String json(@RequestBody JsonObject jsonObject) {
  ......
}

<dependency>
    <groupId>commons-fileupload</groupId>
    <artifactId>commons-fileupload</artifactId>
    <version>${fileupload.version}</version>
</dependency>

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxInMemorySize" value="10240000"/>
    <property name="defaultEncoding" value="UTF-8"/>
    <property name="maxUploadSize" value="10240000"/>
    <property name="uploadTempDir" value="temp"/>
</bean>

@RequestMapping("/multipart")
public String multipart(MultipartFile file) {
    return file.getOriginalFilename();
}

//username:name
//password:pass
//jsonkey:{"object1": "objct"}

//转化为x-www-form-urlencoded就是
username=name&password=pass&jsonkey=%7B++%22object1%22%3A+%22objct%22%7D

username=name&password=pass&file=(文件的BASE64编码)