xml复制代码<?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_4_0.xsd"
         version="4.0"
         metadata-complete="true">
</web-app>

xml复制代码<?xml version="1.0" encoding="UTF-8"?>

<!--Maven版本和头文件-->
<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>

    <!--Maven的GAV（坐标）-->
  <groupId>com.cheng</groupId><!-- groupId：定义当前Maven组织名称 -->
  <artifactId>javaweb-02-maven</artifactId><!-- artifactId：定义实际项目名称 -->
  <version>1.0-SNAPSHOT</version><!-- version：定义当前项目的当前版本 -->

    <!--package：项目的打包方式
 jar:java应用
 war：JavaWeb应用
 -->
  <packaging>war</packaging>

  <name>javaweb-02-maven Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

    <!--配置-->
  <properties>
<!--编码-->
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<!--编译版本，可以改成1.8-->
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>

    <!--项目依赖-->
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

    <!--项目构建用的东西-->
  <build>
    <finalName>javaweb-02-maven</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

xml复制代码<!--在build中配置resources,来防止我们资源导出失败的问题-->
    <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <excludes>
                    <exclude>**/*.properties</exclude>
                    <exclude>**/*.xml</exclude>
                </excludes>
                <filtering>true</filtering>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>

csharp复制代码public void interrupt();

java复制代码public static boolean interrupted()

arduino复制代码public boolean isInterrupted();

scss复制代码public void lock() {
    sync.acquire(1);
}
​
public final void acquire(int arg) {
  if (!tryAcquire(arg) &&
  acquireQueued(addWaiter(Node.EXCLUSIVE), arg))
  selfInterrupt();
}

java复制代码public void lockInterruptibly() throws InterruptedException {
    sync.acquireInterruptibly(1);
}
public final void acquireInterruptibly(int arg)
  throws InterruptedException {
  if (Thread.interrupted())
    throw new InterruptedException();
  if (!tryAcquire(arg))
    doAcquireInterruptibly(arg);
}

ini复制代码输入： arr = [3,2,1], k = 2
输出： [1,2] 或者 [2,1]

ini复制代码输入： arr = [0,1,2,1], k = 1
输出： [0]

java复制代码class Solution {
    public int[] getLeastNumbers(int[] arr, int k) {
        PriorityQueue<Integer> queue = new PriorityQueue<>();
        for(int i=0; i<arr.length; i++){
            queue.offer(arr[i]);
        }
        int[] result = new int[k];
        for(int i=0; i<k; i++){
            result[i] = queue.poll();
        }
        return result;
    }
}

css复制代码输入：
["MedianFinder","addNum","addNum","findMedian","addNum","findMedian"]
[[],[1],[2],[],[3],[]]
输出：[null,null,null,1.50000,null,2.00000]

css复制代码输入：
["MedianFinder","addNum","findMedian","addNum","findMedian"]
[[],[2],[],[3],[]]
输出：[null,null,2.00000,null,2.50000]

java复制代码class MedianFinder {

    PriorityQueue<Integer> left;
    PriorityQueue<Integer> right;

    /** initialize your data structure here. */
    public MedianFinder() {
        left = new PriorityQueue<>(Comparator.reverseOrder());
        right = new PriorityQueue<>();
    }
    
    public void addNum(int num) {
        left.add(num);
        right.add(left.poll());
        if(left.size() +1 < right.size()){
            left.add(right.poll());
        }
    }
    
    public double findMedian() {
        if(right.size() > left.size()){
            return right.peek();
        }
        return (double)(left.peek()+ right.peek()) /2;
    }
}

/**
 * Your MedianFinder object will be instantiated and called as such:
 * MedianFinder obj = new MedianFinder();
 * obj.addNum(num);
 * double param_2 = obj.findMedian();
 */

perl复制代码大于  => >
大于等于  => >=
小于  => <
小于等于  => <=
不等于  => <>

sql复制代码select * from user where id>2;

sql复制代码select * from user where id >2

sql复制代码select * from user where id<=2;

sql复制代码select * from user where id <=2

sql复制代码select * from user where id<=2;

xml复制代码select * from user where id  <![CDATA[ <= ]]> 2

sql复制代码select * from user where id !=2;

xml复制代码select * from user where id  <![CDATA[ <> ]]> 2

go复制代码type option struct {
	A string
	B string
	C int
}

Go复制代码func newOption(a, b string, c int) *option {
	return &option{
		A: a,
		B: b,
		C: c,
	}
}

go复制代码option := newOption("a","b",10)

go复制代码func newOption1(a, b string) *option {
	return &option{
		A: a,
		B: b,
	}
}

go复制代码type OptionFunc func(*option)

func WithA(a string) OptionFunc {
	return func(o *option) {
		o.A = a
	}
}

func WithB(b string) OptionFunc {
	return func(o *option) {
		o.B = b
	}
}

func WithC(c int) OptionFunc {
	return func(o *option) {
		o.C = c
	}
}

Go复制代码func newOption(opts... OptionFunc)(opt  *option) {
	opt = &option{
		A: "A",
		B: "B",
		C: 100,
	}
	for _, optFun := range opts {
		optFun(opt)
	}
	return
}

Go复制代码func TestGo7(t *testing.T) {
	o := newOption()
	fmt.Println(o)

	o1 := newOption(
		WithA("1"),
	)
	fmt.Println(o1)

	o2 := newOption(
		WithA("a"),
		WithB("b"),
		WithC(10),
		)
	fmt.Println(o2)
}

go复制代码// DataDictionary [...]
type DataDictionary struct {
	ID         string    `gorm:"primaryKey;column:id;type:varchar(255);not null" json:"-"`
	DataType   string    `gorm:"column:data_type;type:varchar(255);not null" json:"dataType"`      // 数据类型
	DataKey    string    `gorm:"column:data_key;type:varchar(255);not null" json:"dataKey"`        // 数据key
	DataValue  string    `gorm:"column:data_value;type:varchar(255);not null" json:"dataValue"`    // 数据value
	SortNumber int       `gorm:"column:sort_number;type:int;not null" json:"sortNumber"`           // 排序编号
	Level      string    `gorm:"column:level;type:varchar(255);not null" json:"level"`             // 级别
	Deleted    bool      `gorm:"column:deleted;type:tinyint(1);not null;default:0" json:"deleted"` // 是否删除
	UpdateTime time.Time `gorm:"column:update_time;type:timestamp;not null" json:"updateTime"`     // 更新时间
	CreateTime time.Time `gorm:"column:create_time;type:timestamp;not null" json:"createTime"`     // 创建时间
	DomainID   string    `gorm:"column:domain_id;type:varchar(255)" json:"domainId"`               // 主账号
}

// TableName get sql table name.获取数据库表名
func (m *DataDictionary) TableName() string {
	return "data_dictionary"
}

go复制代码type options struct {
	query map[string]interface{}
}

type Option interface {
	apply(*options)
}

type optionFunc func(*options)

func (f optionFunc) apply(o *options) {
	f(o)
}

go复制代码/****************************************  选项模式  ***********************************************************/

// WithDataType dataType获取 字典类别
func (obj *DataDictionaryMapper) WithDataType(dataType string) Option {
	return optionFunc(func(o *options) { o.query["data_type"] = dataType })
}

// WithDataKey dataType获取 字典类别
func (obj *DataDictionaryMapper) WithDataKey(dataKey string) Option {
	return optionFunc(func(o *options) { o.query["data_key"] = dataKey })
}

go复制代码// GetByOption 功能选项模式获取
func (obj *DataDictionaryMapper) GetByOption(opts ...Option) (result []po.DataDictionary, err error) {
	options := options{
		query: make(map[string]interface{}, len(opts)),
	}
	for _, o := range opts {
		o.apply(&options)
	}
	err = obj.DB.Where(options.query).Find(&result).Error
	return
}

go复制代码res, _:= c.GetByOption(c.WithDataType("position"))

go复制代码switch v := arg.(type) {
		case clause.Expression:
			conds = append(conds, v)
		case *DB:
			if cs, ok := v.Statement.Clauses["WHERE"]; ok {
				if where, ok := cs.Expression.(clause.Where); ok {
					if len(where.Exprs) == 1 {
						if orConds, ok := where.Exprs[0].(clause.OrConditions); ok {
							where.Exprs[0] = clause.AndConditions(orConds)
						}
					}
					conds = append(conds, clause.And(where.Exprs...))
				} else if cs.Expression != nil {
					conds = append(conds, cs.Expression)
				}
			}
		case map[interface{}]interface{}:
			for i, j := range v {
				conds = append(conds, clause.Eq{Column: i, Value: j})
			}
		case map[string]string:
			var keys = make([]string, 0, len(v))
			for i := range v {
				keys = append(keys, i)
			}
			sort.Strings(keys)

			for _, key := range keys {
				conds = append(conds, clause.Eq{Column: key, Value: v[key]})
			}
		case map[string]interface{}:
			var keys = make([]string, 0, len(v))
			for i := range v {
				keys = append(keys, i)
			}
			sort.Strings(keys)

			for _, key := range keys {
				reflectValue := reflect.Indirect(reflect.ValueOf(v[key]))
				switch reflectValue.Kind() {
				case reflect.Slice, reflect.Array:
					if _, ok := v[key].(driver.Valuer); ok {
						conds = append(conds, clause.Eq{Column: key, Value: v[key]})
					} else if _, ok := v[key].(Valuer); ok {
						conds = append(conds, clause.Eq{Column: key, Value: v[key]})
					} else {
						// optimize reflect value length
						valueLen := reflectValue.Len()
						values := make([]interface{}, valueLen)
						for i := 0; i < valueLen; i++ {
							values[i] = reflectValue.Index(i).Interface()
						}

						conds = append(conds, clause.IN{Column: key, Values: values})
					}
				default:
					conds = append(conds, clause.Eq{Column: key, Value: v[key]})
				}
			}

js复制代码#include<stdio.h>
#include<stdlib.h> 
#define max 20
//边表节点 
typedef struct node{
	int adjvex;
	struct node *next; 
}eNode;
//头节点
typedef struct headnode{
	char vertex;
	eNode *firstedge;
}hNode; 
//邻接表
typedef struct{
	hNode adjlist[max];
	int n,e;   //顶点数，边数 
}linkG; 

//创建（邻接表） 
linkG *creat(linkG *g,int c) //c为0表示无向图 
{
	int i,j,k;
	eNode *s;
	int n1,e1;
	char ch;
	g=(linkG *)malloc(sizeof(linkG));
	printf("请输入顶点数及边数: ");
	scanf("%d%d",&n1,&e1);
	g->n=n1;g->e=e1;
	printf("请输入顶点信息：");
	getchar();
	for(i=0;i<n1;i++)
	{
		scanf("%c",&ch);
		g->adjlist[i].vertex=ch;
		g->adjlist[i].firstedge=NULL;
	 } 
	 getchar();
	 int i1,j1;
	 for(k=0;k<e1;k++)
	 {
	 	printf("请输入对（i,j）: ");
	 	scanf("%d%d",&i1,&j1);
	 	s=(eNode *)malloc(sizeof(eNode));
	 	s->adjvex=j1;
	 	s->next=g->adjlist[i1].firstedge;
	 	g->adjlist[i1].firstedge=s;
	 	if(c==0)
	 	{
	 		s=(eNode *)malloc(sizeof(eNode));
	 		s->adjvex=i1;
	 		s->next=g->adjlist[j1].firstedge;
	 		g->adjlist[j1].firstedge=s;
		  } 
	 }
	 return g;
}

int visited[max]; //标记是否访问 

//深度优先遍历DFS
void dfs(linkG *g,int i) //顶点i
{
	eNode *p;
	printf("%c ",g->adjlist[i].vertex);
	visited[i]=1;
	p=g->adjlist[i].firstedge;
	while(p)
	{
		if(!visited[p->adjvex])
			dfs(g,p->adjvex);
		p=p->next;
	}

}

void dfstravel(linkG *g)
{
	int i;
	for(i=0;i<g->n;i++)
		visited[i]=0;
	for(i=0;i<g->n;i++)
		if(!visited[i])
			dfs(g,i);
 } 

//广度优先遍历BFS
void bfs(linkG *g,int i) 
{
	int j;
	eNode *p;
	int q[max],front,rear;
	front=rear=0;
	printf("%c ",g->adjlist[i].vertex);
	visited[i]=1;
	q[rear++]=i;
	while(rear>front)
	{
		j=q[front++];
		p=g->adjlist[j].firstedge;
		while(p)
		{
			if(visited[p->adjvex]==0)
			{
				printf("%c ",g->adjlist[p->adjvex].vertex);
				q[rear++]=p->adjvex;
				visited[p->adjvex]=1;
			}
			p=p->next;
		}
	}
}

void bfstravel(linkG *g)
{
	int i,count=0;
	for(i=0;i<g->n;i++)
		visited[i]=0;
	for(i=0;i<g->n;i++)
		if(!visited[i])
			bfs(g,i);
}
 
//主函数 
int main()
{
	linkG *g;
	g=creat(g,0);
	printf("DFS：");
	dfstravel(g);
	printf("\n");
	printf("BFS：");
	bfstravel(g);
	printf("\n");
	
	
}

bash复制代码rpm -Uvh http://nginx.org/packages/centos/7/noarch/RPMS/nginx-release-centos-7-0.el7.ngx.noarch.rpm

复制代码yum install -y nginx

bash复制代码systemctl start nginx #启动,restart-重启,stop-停止
systemctl enable nginx #开机启动

arduino复制代码yum remove nginx

lua复制代码systemctl  status  nginx

复制代码nginx -v

ruby复制代码rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

sql复制代码yum search php72w

复制代码yum install php72w.x86_64 php72w-fpm.x86_64 php72w-cli.x86_64 php72w-common.x86_64 php72w-gd.x86_64 php72w-ldap.x86_64 php72w-mbstring.x86_64 php72w-mcrypt.x86_64 php72w-mysql.x86_64 php72w-pdo.x86_64 php72w-pecl-redis.x86_64

bash复制代码systemctl start php-fpm #启动,restart-重启，stop-停止
systemctl enable php-fpm #开机启动

perl复制代码php-fpm -v #查看版本
ps -ef | grep php-fpm #查看运行状态

复制代码whereis nginx.conf

arduino复制代码vi /etc/nginx/conf.d/default.conf

perl复制代码index  index.html index.htm;
修改为：
index  index.php index.html index.htm; #添加index.php

ini复制代码 　　　　# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
 　　　　#
 　　　　location ~ .php$ {
     　　　　root            /usr/share/nginx/html;  #网站根目录
     　　　　fastcgi_pass   127.0.0.1:9000;
    　　　　 fastcgi_index  index.php;
    　　　　 fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
    　　　　 include        fastcgi_params;
　　　　 }

bash复制代码service nginx restart   #重启nginx
service php-fpm start   #开启php-fpm

bash复制代码vim /usr/share/nginx/html/index.php

ini复制代码[mariadb]
name = MariaDB
baseurl = http://yum.mariadb.org/10.2/centos7-amd64
gpgkey=https://yum.mariadb.org/RPM-GPG-KEY-MariaDB
gpgcheck=1

vbscript复制代码yum install MariaDB-server MariaDB-client -y

arduino复制代码systemctl start mariadb
systemctl stop mariadb

bash复制代码systemctl enable mariadb

复制代码mysql_secure_installation

rust复制代码Enter current password for root (enter for none):<–初次运行直接回车

sql复制代码Set root password? [Y/n] <– 是否设置root用户密码，输入y并回车或直接回车
New password: <– 设置root用户的密码
Re-enter new password: <– 再输入一次你设置的密码

bash复制代码Remove anonymous users? [Y/n] <– 是否删除匿名用户，回车
Disallow root login remotely? [Y/n] <–是否禁止root远程登录,回车,
Remove test database and access to it? [Y/n] <– 是否删除test数据库，回车
Reload privilege tables now? [Y/n] <– 是否重新加载权限表，回车

复制代码mysql -uroot –ppassword

sql复制代码mysql>create user username@localhost identified by 'password';

css复制代码mysql>grant all on *.* to username@localhost indentified by 'password';

csharp复制代码mysql>grant all privileges on *.* to username@'%' identified by 'password';

sql复制代码mysql>grant all privileges on *.* to username@'hostname' identified by 'password' with grant option;

arduino复制代码flush privileges; /*刷新权限*/