application.properties 提供自定义属性的支持，我们可以配置一些常量。
默认加载位置包含：
1、项目工程的根目录/；
2、项目工程根目录下的config/目录；
3、项目工程的resource/目录；
4、项目工程的resource/config/目录
一、application.properties
made.name=made
made.address=BeiJing
made.tel=15510000***
二、直接使用
package com.made.springBoot.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.made.springBoot.common.ConfigProperties;
import com.made.springBoot.common.TestProperties;
@RestController // controller里面的方法都以json格式输出
public class MainController {
@Value("${made.name}")
private String name;
@Value("${made.address}")
private String address;
@Value("${made.tel}")
private String tel;
@RequestMapping("/test")
public String test() {
return name + address + tel;
}
}
三、编写 Bean类，加载属性
有时候属性太多，影响代码可读性，我们可以在实体 Bean中加载出来
1. 使用 spring支持的 @Value
package com.made.springBoot.common;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
@Component
public class ConfigProperties {
@Value("${made.name}")
private String name;
@Value("${made.address}")
private String address;
@Value("${made.tel}")
private String tel;
@Override
public String toString() {
return "ConfigProperties [name=" + name + ", address=" + address + ", tel=" + tel + "]";
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getTel() {
return tel;
}
public void setTel(String tel) {
this.tel = tel;
}
}
2.使用@ConfigurationProperties(prefix="") 设置前缀，属性上不需要添加注解
package com.made.springBoot.common;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
@Component // == spring Boot入口类上加 @EnableConfigurationProperties({ConfigProperties .class})
@ConfigurationProperties(prefix="made")
public class ConfigProperties {
private String name;
private String address;
private String tel;
@Override
public String toString() {
return "ConfigProperties [name=" + name + ", address=" + address + ", tel=" + tel + "]";
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getTel() {
return tel;
}
public void setTel(String tel) {
this.tel = tel;
}
}
3. 使用
在controller中注入并使用 ConfigProperties 这个 Bean。
package com.made.springBoot.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.made.springBoot.common.ConfigProperties;
import com.made.springBoot.common.TestProperties;
//@Controller
@RestController // controller里面的方法都以json格式输出
public class MainController {
@Autowired
private ConfigProperties properties;
@RequestMapping("/test")
public String test() {
System.out.println(properties);
return "test";
}
}
四、自定义配置文件
有时候我们不希望把所有配置都放在 application.properties里面，这时候我们可以另外定义一个 test.properties。
1. est.properties
made.test.name=mmm
made.test.address=china
made.test.tel=15510000***
2. 实体类 Bean
package com.made.springBoot.common;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;
@Component
@PropertySource("classpath:test.properties")
@ConfigurationProperties(prefix="made.test")
public class TestProperties {
private String name;
private String address;
private String tel;
@Override
public String toString() {
return "TestProperties [name=" + name + ", address=" + address + ", tel=" + tel + "]";
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public String getTel() {
return tel;
}
public void setTel(String tel) {
this.tel = tel;
}
}
