springboot

覆盖默认版本

<properties>
    <spring-data-releasetrain.version>Fowler-SR2</spring-data-releasetrain.version>
</properties>


***************************************
@ContextConfiguration(locations = { "classpath*:/applicationContext.xml" })

从属性文件中自动装配该类中

@ConfigurationProperties(prefix = "spring.redis")
public class RedisProperties {
    /**
     * Database index used by the connection factory.
     */
    private int database = 0;

    /**
     * Redis url, which will overrule host, port and password if set.
     */
    private String url;

    /**
     * Redis server host.
     */
    private String host = "localhost";

    /**
     * Login password of the redis server.
     */
    private String password;

    /**
     * Redis server port.
     */
    private int port = 6379;
    // 其它参数略
}

1  Application 会扫描同级包和下级包

不过想自动配置第三方的插件
@SpringBootApplication(exclude={RedisAutoConfiguration.class,})


@PropertySource(value={"classpath:jdbc.properties",""})

@PropertySource(value = "classpath:jdbc.properties",ignoreResourceNotFound = true)

一、@PropertySource  加载外面资源文件

@PropertySource(value={"person.properties"})
@Configuration
public class SpringConfigProperty {
​
    @Bean
    public Person person(){
        return new Person();
    }
​

xml 加载外部资源方式

<context:property-placeholder  location="classpath:spring-common.xml"/>

二、@value 赋值的使用

//使用@Value赋值；
//1、基本数值
//2、可以写SpEL； #{}
//3、可以写${}；取出配置文件【properties】中的值（在运行环境变量里面的值）
    @Value("1")
    private Integer id;
    @Value("${person.nickName}")
    private String name;
    @Value("#{20-2}")
    private String age;

2 自定义banner.txt
放到resource

#配置程序端口，默认为8080
server.port= 9000

server.servlet.context-path=/tj
#用户绘画session过期时间，以秒为单位


# 配置Tomcat编码,默认为UTF-8
server.tomcat.uri-encoding=UTF-8
# 配置最大线程数
server.tomcat.max-threads=1000


# 默认值为 /**
#例如改成/my/**,那运行的时候访问 http://lcoalhost:8080/dudu/my.html 才对应到index.html页面。
#spring.mvc.static-path-pattern=/my/**
spring.mvc.static-path-pattern=/**
# 默认值为 classpath:/META-INF/resources/,classpath:/resources/,classpath:/static/,classpath:/public/
spring.resources.static-locations=classpath:/META-INF/resources/,classpath:/resources/,classpath:/static/,classpath:/public/

态资源存放的默认位置由4个目录，分别在根目录，即/src/main/resources/目录下的/META-INF/resources/、/resources/、/static/、/public/目录下（优先级也是这个顺序）。



#热部署重启   static下的文件修改不重启
#spring.devtools.restart.exclude=static/**,public/**


# jsp 开始----------------------
#spring.mvc.view.prefix=/WEB-INF/jsp/
#spring.mvc.view.suffix=.jsp
# jsp 结束----------------------

# freemarker 开始----------------------
spring.freemarker.allow-request-override=false  
spring.freemarker.allow-session-override=false  
spring.freemarker.cache=true  
spring.freemarker.check-template-location=true  
spring.freemarker.content-type=text/html  
spring.freemarker.enabled=true  
spring.freemarker.expose-request-attributes=false  
spring.freemarker.expose-session-attributes=false  
spring.freemarker.expose-spring-macro-helpers=true  
spring.freemarker.prefer-file-system-access=true  
spring.freemarker.suffix=.ftl
spring.freemarker.template-loader-path=classpath:/templates/
spring.freemarker.settings.template_update_delay=0  
spring.freemarker.settings.default_encoding=UTF-8  
spring.freemarker.settings.classic_compatible=true  
spring.freemarker.order=1 
# freemarker 结束----------------------



## REDIS (RedisProperties)
#spring.redis.cluster.max-redirects=
## Maximum number of redirects to follow when executing commands across the cluster.
#spring.redis.cluster.nodes=
## Comma-separated list of "host:port" pairs to bootstrap from.
#spring.redis.database=0
## Database index used by the connection factory.
#spring.redis.url=
## Connection URL. Overrides host, port, and password. User is ignored. Example: redis://user:password@example.com:6379
#spring.redis.host=192.168.1.252
## Redis server host.
#spring.redis.jedis.pool.max-active=8
## Maximum number of connections that can be allocated by the pool at a given time. Use a negative value for no limit.
#spring.redis.jedis.pool.max-idle=8
## Maximum number of "idle" connections in the pool. Use a negative value to indicate an unlimited number of idle connections.
#spring.redis.jedis.pool.max-wait=-1ms
## Maximum amount of time a connection allocation should block before throwing an exception when the pool is exhausted. Use a negative value to block indefinitely.
#spring.redis.jedis.pool.min-idle=0
## Target for the minimum number of idle connections to maintain in the pool. This setting only has an effect if it is positive.
#spring.redis.lettuce.pool.max-active=8
## Maximum number of connections that can be allocated by the pool at a given time. Use a negative value for no limit.
#spring.redis.lettuce.pool.max-idle=8
## Maximum number of "idle" connections in the pool. Use a negative value to indicate an unlimited number of idle connections.
#spring.redis.lettuce.pool.max-wait=-1ms
## Maximum amount of time a connection allocation should block before throwing an exception when the pool is exhausted. Use a negative value to block indefinitely.
#spring.redis.lettuce.pool.min-idle=0
## Target for the minimum number of idle connections to maintain in the pool. This setting only has an effect if it is positive.
#spring.redis.lettuce.shutdown-timeout=100ms
## Shutdown timeout.
#spring.redis.password=321
## Login password of the redis server.
#spring.redis.port=6379
## Redis server port.
#spring.redis.sentinel.master=
## Name of the Redis server.
#spring.redis.sentinel.nodes=
## Comma-separated list of "host:port" pairs.
#spring.redis.ssl=false
## Whether to enable SSL support.
#spring.redis.timeout=
## Connection timeout.

<?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>com.tj</groupId>
    <artifactId>tj-center</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>tj-center</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>


        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>io.lettuce</groupId>
                    <artifactId>lettuce-core</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
        </dependency>


        <!--代码发生改变自动重启CTRL+F9重新编译一下触发-->
        <!--devtools会自动帮你做到这些，禁用所有模板的缓存-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional> <!-- 这个需要为 true 热部署才有效 -->
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

如果只是静态HTML页面，不带错误信息的，在resources/public/下面创建error目录，在error目录下面创建对应的状态码html即可 ，例如，要将404映射到静态HTML文件，您的文件夹结构如下所示：

如果是动态模板页面，可以带上错误信息，在resources/templates/下面创建error目录，在error目录下面命名即可:

如果同时存在静态页面500.html和动态模板的500.html，则后者覆盖前者。即templates/error/这个的优先级比resources/public/error高。