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GuiceJsonConfigExample.java
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GuiceJsonConfigExample.java
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package com.google.code.guice.example;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.code.guice.jsonconfig.JsonConfigModule;
import com.google.code.guice.jsonconfig.JsonConfigProvider;
import com.google.inject.*;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;
import java.util.Properties;
/**
* Created by yihaibo on 2019-09-29.
* json自动装配
*/
public class GuiceJsonConfigExample {
public static void main( String[] args ) {
Injector injector = Guice.createInjector(new JsonConfigModule(), new Module() {
@Override
public void configure(Binder binder) {
JsonConfigProvider.bind(binder, "druid.server", DruidServerConfig.class);
}
@Provides
@Singleton
/**
* Properties代码注入需注意必须为string
*/
Properties provideProperties() {
Properties props = new Properties();
props.put("druid.server.hostname", "0.0.0.0");
props.put("druid.server.port", "3333");
return props;
}
@Provides @Singleton
ObjectMapper provideObjectMapper() {
return new ObjectMapper();
}
});
DruidServerConfig druidServerConfig = injector.getInstance(DruidServerConfig.class);
System.out.println(druidServerConfig.port);
System.out.println(druidServerConfig.hostname);
}
public static class DruidServerConfig {
@JsonProperty
@NotNull
public String hostname = null;
@JsonProperty @Min(1025) public int port = 8080;
}
}