1、實(shí)現(xiàn)方式一：Spring中的@PropertySource

@Component@PropertySource('classpath:user.properties')public class UserInfo { @Value('${user.username}') private String username; @Value('${user.password}') private String password; @Value('${user.age}') private Integer age; @Override public String toString() { return 'UserInfo{' + 'username=’' + username + ’’’ + ', password=’' + password + ’’’ + ', age=' + age + ’}’; }}

配置文件中：

user.username=’admin’user.password=’123’user.age=88

測(cè)試：

@SpringBootTestpublic class UserInfoTest { @Autowired UserInfo userInfo; @Test public void user(){ System.out.println(userInfo.toString()); }}

結(jié)果：

UserInfo{username=’’admin’’, password=’’123’’, age=88}

注意：此方法是不安全的，如果在配置文件中找不到對(duì)應(yīng)的屬性，例如沒(méi)有username屬性，會(huì)報(bào)錯(cuò)如下：

java.lang.IllegalStateException: Failed to load ApplicationContextCaused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name ’userInfo’: Injection of autowired dependencies failed; nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder ’user.username’ in value '${user.username}'

2、實(shí)現(xiàn)方式二：通過(guò)SpringBoot特有的@ConfigurationProperties來(lái)實(shí)現(xiàn)

注意點(diǎn)： 需要getter、setter函數(shù)

@Component@PropertySource('classpath:user.properties')@ConfigurationProperties(prefix = 'user')public class UserInfo {// @Value('${user.username}') private String username;// @Value('${user.password}') private String password;// @Value('${user.age}') private Integer age; public String getUsername() { return username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public void setUsername(String username) { this.username = username; } @Override public String toString() { return 'UserInfo{' + 'username=’' + username + ’’’ + ', password=’' + password + ’’’ + ', age=' + age + ’}’; }}

這種方法比較安全，即使配置文件中沒(méi)有對(duì)于屬性，也不會(huì)拋出異常。

以上就是SpringBoot屬性注入的兩種方法的詳細(xì)內(nèi)容，更多關(guān)于SpringBoot屬性注入的資料請(qǐng)關(guān)注好吧啦網(wǎng)其它相關(guān)文章！