Spring\u7684@Autowired\u6ce8\u89e3\u7528\u4e8e\u81ea\u52a8\u4f9d\u8d56\u6ce8\u5165\u3002Spring\u6846\u67b6\u662f\u5efa\u7acb\u5728\u4f9d\u8d56\u6ce8\u5165\u57fa\u7840\u4e0a\u7684\uff0c\u6211\u4eec\u901a\u8fc7Spring bean\u914d\u7f6e\u6587\u4ef6\u6765\u6ce8\u5165\u7c7b\u7684\u4f9d\u8d56\u3002<\/p>\n
\u901a\u5e38\u5728Spring\u7684bean\u914d\u7f6e\u6587\u4ef6\u4e2d\uff0c\u6211\u4eec\u63d0\u4f9b\u4e86bean\u7684\u914d\u7f6e\u7ec6\u8282\uff0c\u5e76\u4e14\u4f7f\u7528ref\u5c5e\u6027\u6765\u6307\u5b9a\u5c06\u6ce8\u5165\u5230\u5176\u4ed6bean\u4e2d\u7684beans\u3002\u4f46\u662fSpring\u6846\u67b6\u4e5f\u63d0\u4f9b\u4e86\u81ea\u52a8\u88c5\u914d\u7684\u529f\u80fd\uff0c\u8fd9\u6837\u6211\u4eec\u5c31\u4e0d\u9700\u8981\u660e\u786e\u63d0\u4f9bbean\u7684\u6ce8\u5165\u7ec6\u8282\u3002\u6709\u4e0d\u540c\u7684\u65b9\u5f0f\u53ef\u4ee5\u5b9e\u73b0\u81ea\u52a8\u88c5\u914dSpring\u7684bean\uff1a<\/p>\n
\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cSpring Bean\u7684\u81ea\u52a8\u88c5\u914d\u662f\u5173\u95ed\u7684\u3002Spring Bean\u81ea\u52a8\u88c5\u914d\u7684\u9ed8\u8ba4\u503c\u662f”default”\uff0c\u610f\u5473\u7740\u4e0d\u6267\u884c\u81ea\u52a8\u88c5\u914d\u3002autowire\u503c\u4e3a”no”\u65f6\u4e5f\u5177\u6709\u76f8\u540c\u7684\u884c\u4e3a\u3002\u4e3a\u4e86\u5c55\u793aSpring Bean\u81ea\u52a8\u88c5\u914d\u7684\u4f7f\u7528\uff0c\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684Spring Maven\u9879\u76ee\u3002\u6211\u4eec\u6700\u7ec8\u7684\u9879\u76ee\u5c06\u5982\u4e0b\u56fe\u6240\u793a\u3002\u8ba9\u6211\u4eec\u9010\u4e2a\u67e5\u770b\u6bcf\u4e2a\u81ea\u52a8\u88c5\u914d\u9009\u9879\u3002\u4e3a\u6b64\uff0c\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a\u6a21\u578bbean\u548c\u4e00\u4e2a\u670d\u52a1\u7c7b\uff0c\u6211\u4eec\u5c06\u5728\u670d\u52a1\u7c7b\u4e2d\u6ce8\u5165\u6a21\u578bbean\u3002<\/p>\n
\u5bf9\u4e8eSpring\u81ea\u52a8\u88c5\u914d\uff0c\u6211\u4eec\u4e0d\u9700\u8981\u6dfb\u52a0\u4efb\u4f55\u989d\u5916\u7684\u4f9d\u8d56\u3002\u6211\u4eec\u7684pom.xml\u6587\u4ef6\u5305\u542bSpring\u6846\u67b6\u6838\u5fc3\u4f9d\u8d56\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
<project xmlns=\"https:\/\/maven.apache.org\/POM\/4.0.0\" xmlns:xsi=\"https:\/\/www.w3.org\/2001\/XMLSchema-instance\"\r\n\txsi:schemaLocation=\"https:\/\/maven.apache.org\/POM\/4.0.0 https:\/\/maven.apache.org\/xsd\/maven-4.0.0.xsd\">\r\n\t<modelVersion>4.0.0<\/modelVersion>\r\n\t<groupId>org.springframework.samples<\/groupId>\r\n\t<artifactId>SpringBeanAutowiring<\/artifactId>\r\n\t<version>0.0.1-SNAPSHOT<\/version>\r\n\r\n\t<properties>\r\n\r\n\t\t<!-- \u901a\u7528\u5c5e\u6027 -->\r\n\t\t<java.version>1.6<\/java.version>\r\n\t\t<project.build.sourceEncoding>UTF-8<\/project.build.sourceEncoding>\r\n\t\t<project.reporting.outputEncoding>UTF-8<\/project.reporting.outputEncoding>\r\n\r\n\t\t<!-- Spring -->\r\n\t\t<spring-framework.version>4.0.2.RELEASE<\/spring-framework.version>\r\n\r\n\t\t<!-- \u65e5\u5fd7 -->\r\n\t\t<logback.version>1.0.13<\/logback.version>\r\n\t\t<slf4j.version>1.7.5<\/slf4j.version>\r\n\r\n\t<\/properties>\r\n\r\n\t<dependencies>\r\n\t\t<!-- Spring\u548c\u4e8b\u52a1 -->\r\n\t\t<dependency>\r\n\t\t\t<groupId>org.springframework<\/groupId>\r\n\t\t\t<artifactId>spring-context<\/artifactId>\r\n\t\t\t<version>${spring-framework.version}<\/version>\r\n\t\t<\/dependency>\r\n\t\t<dependency>\r\n\t\t\t<groupId>org.springframework<\/groupId>\r\n\t\t\t<artifactId>spring-tx<\/artifactId>\r\n\t\t\t<version>${spring-framework.version}<\/version>\r\n\t\t<\/dependency>\r\n\r\n\t\t<!-- \u4f7f\u7528SLF4J\u548cLogBack\u8fdb\u884c\u65e5\u5fd7\u8bb0\u5f55 -->\r\n\t\t<dependency>\r\n\t\t\t<groupId>org.slf4j<\/groupId>\r\n\t\t\t<artifactId>slf4j-api<\/artifactId>\r\n\t\t\t<version>${slf4j.version}<\/version>\r\n\t\t\t<scope>compile<\/scope>\r\n\t\t<\/dependency>\r\n\t\t<dependency>\r\n\t\t\t<groupId>ch.qos.logback<\/groupId>\r\n\t\t\t<artifactId>logback-classic<\/artifactId>\r\n\t\t\t<version>${logback.version}<\/version>\r\n\t\t\t<scope>runtime<\/scope>\r\n\t\t<\/dependency>\r\n\r\n\t<\/dependencies>\r\n<\/project>\r\n<\/code><\/pre>\nSpring\u7684@Autowired\u6ce8\u89e3 – \u6a21\u578bBean<\/h3>\n
\u6211\u4eec\u6765\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684Java Bean\uff0c\u540d\u4e3aEmployee\u3002\u8fd9\u4e2aBean\u5c06\u5177\u6709\u4e00\u4e2a\u5e26\u6709getter\u548csetter\u65b9\u6cd5\u7684\u5c5e\u6027\u3002\u6211\u4eec\u5c06\u5728Spring bean\u914d\u7f6e\u6587\u4ef6\u4e2d\u521d\u59cb\u5316\u8be5\u5c5e\u6027\u7684\u503c\u3002<\/p>\n
package com.Olivia.spring.autowiring.model;\r\n\r\npublic class Employee {\r\n\r\n\tprivate String name;\r\n\r\n\tpublic String getName() {\r\n\t\treturn name;\r\n\t}\r\n\r\n\tpublic void setName(String name) {\r\n\t\tthis.name = name;\r\n\t}\r\n}\r\n<\/code><\/pre>\n@Autowired\u6ce8\u89e3 – \u670d\u52a1\u7c7b<\/h3>\n
\u8ba9\u6211\u4eec\u521b\u5efa\u6211\u4eec\u7684\u670d\u52a1\u7c7b\uff0c\u5728\u8fd9\u4e2a\u7c7b\u4e2d\u6211\u4eec\u5c06\u901a\u8fc7Spring\u7684\u81ea\u52a8\u88c5\u914d\u6765\u6ce8\u5165\u5458\u5de5bean\u3002<\/p>\n
package com.Olivia.spring.autowiring.service;\r\n\r\nimport com.Olivia.spring.autowiring.model.Employee;\r\n\r\npublic class EmployeeService {\r\n\r\n\tprivate Employee employee;\r\n\r\n\t\/\/ \u6784\u9020\u51fd\u6570\u7528\u4e8e\u6309\u6784\u9020\u51fd\u6570\u81ea\u52a8\u88c5\u914d\r\n\tpublic EmployeeService(Employee emp) {\r\n\t\tSystem.out.println(\"\u4f7f\u7528\u6784\u9020\u51fd\u6570\u81ea\u52a8\u88c5\u914d\");\r\n\t\tthis.employee = emp;\r\n\t}\r\n\r\n\t\/\/ \u9ed8\u8ba4\u6784\u9020\u51fd\u6570\uff0c\u907f\u514d\u6309\u540d\u79f0\u6216\u6309\u7c7b\u578b\u81ea\u52a8\u88c5\u914d\u65f6\u51fa\u73b0BeanInstantiationException\r\n\tpublic EmployeeService() {\r\n\t\tSystem.out.println(\"\u4f7f\u7528\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\");\r\n\t}\r\n\r\n\t\/\/ \u7528\u4e8e\u6309\u540d\u79f0\u548c\u6309\u7c7b\u578b\u81ea\u52a8\u88c5\u914d\r\n\tpublic void setEmployee(Employee emp) {\r\n\t\tthis.employee = emp;\r\n\t}\r\n\r\n\tpublic Employee getEmployee() {\r\n\t\treturn this.employee;\r\n\t}\r\n}\r\n<\/code><\/pre>\n\u6211\u4eec\u5c06\u4f7f\u7528\u76f8\u540c\u7684\u670d\u52a1\u7c7b\u6765\u6267\u884cSpring\u7684\u6309\u540d\u79f0\u3001\u6309\u7c7b\u578b\u548c\u6309\u6784\u9020\u51fd\u6570\u8fdb\u884c\u81ea\u52a8\u88c5\u914d\u3002Setter\u65b9\u6cd5\u5c06\u7528\u4e8e\u6309\u540d\u79f0\u548c\u6309\u7c7b\u578b\u8fdb\u884cSpring\u81ea\u52a8\u88c5\u914d\uff0c\u800c\u6784\u9020\u51fd\u6570\u7684\u6ce8\u5165\u5c06\u4f7f\u7528\u6784\u9020\u5668\u7684\u81ea\u52a8\u88c5\u914d\u5c5e\u6027\u3002\u5f53\u6211\u4eec\u4f7f\u7528Spring\u7684\u6309\u540d\u79f0\u6216\u6309\u7c7b\u578b\u8fdb\u884c\u81ea\u52a8\u88c5\u914d\u65f6\uff0c\u4f1a\u4f7f\u7528\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u6211\u4eec\u660e\u786e\u5730\u4e3aEmployeeService\u7684bean\u5b9a\u4e49\u4e86\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u3002<\/p>\n
Spring\u7684@Autowired\u6ce8\u89e3 – \u6309\u7c7b\u578b\u81ea\u52a8\u88c5\u914d\u7684\u793a\u4f8b<\/h3>\n
\u8ba9\u6211\u4eec\u4e3a\u6309\u7c7b\u578b\u81ea\u52a8\u88c5\u914d\u521b\u5efa\u4e00\u4e2a\u4f7f\u7528Spring @Autowired\u6ce8\u89e3\u7684\u72ec\u7acb\u7c7b\u3002<\/p>\n
\u8fd9\u662f\u6587\u7ae0\u300a\u6625\u5b63\u6ce8\u89e3@Autowired\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51714\u90e8\u5206\uff09\u3002<\/p>\n
package com.Olivia.spring.autowiring.service;\r\n\r\nimport org.springframework.beans.factory.annotation.Autowired;\r\n\r\nimport com.Olivia.spring.autowiring.model.Employee;\r\n\r\npublic class EmployeeAutowiredByTypeService {\r\n\r\n\t\/\/Autowired annotation on variable\/setters is equivalent to autowire=\"byType\"\r\n\t@Autowired\r\n\tprivate Employee employee;\r\n\t\r\n\t@Autowired\r\n\tpublic void setEmployee(Employee emp){\r\n\t\tthis.employee=emp;\r\n\t}\r\n\t\r\n\tpublic Employee getEmployee(){\r\n\t\treturn this.employee;\r\n\t}\r\n}\r\n<\/code><\/pre>\n\u8bf7\u6ce8\u610f\uff0c\u6211\u5df2\u7ecf\u4f7f\u7528Spring\u7684@Autowired\u6ce8\u89e3\u5bf9Employee\u53d8\u91cf\u548c\u5b83\u5bf9\u5e94\u7684setter\u65b9\u6cd5\u8fdb\u884c\u4e86\u6807\u6ce8\uff0c\u7136\u800c\u5728Spring Bean\u81ea\u52a8\u6ce8\u5165\u4e2d\uff0c\u53ea\u9700\u8981\u5176\u4e2d\u4e00\u4e2a\u6807\u6ce8\u5c31\u8db3\u591f\u4e86\u3002<\/p>\n
Spring\u7684@Autowired\u6ce8\u89e3\u548c\u901a\u8fc7\u6784\u9020\u51fd\u6570\u7684@Qualifier Bean\u81ea\u52a8\u88c5\u914d\u793a\u4f8b<\/h3>\n
\u8ba9\u6211\u4eec\u521b\u5efa\u53e6\u4e00\u4e2a\u670d\u52a1\u7c7b\uff0c\u6211\u4eec\u5c06\u5728\u5176\u4e2d\u4f7f\u7528@Autowired\u6ce8\u89e3\u8fdb\u884c\u6784\u9020\u5668\u6ce8\u5165\u3002\u6211\u4eec\u8fd8\u5c06\u770b\u5230@Qualifier\u6ce8\u89e3\u7684\u4f7f\u7528\u3002<\/p>\n
package com.Olivia.spring.autowiring.service;\r\n\r\nimport org.springframework.beans.factory.annotation.Autowired;\r\nimport org.springframework.beans.factory.annotation.Qualifier;\r\n\r\nimport com.Olivia.spring.autowiring.model.Employee;\r\n\r\npublic class EmployeeAutowiredByConstructorService {\r\n\r\n\tprivate Employee employee;\r\n\r\n\t\/\/Autowired annotation on Constructor is equivalent to autowire=\"constructor\"\r\n\t@Autowired(required=false)\r\n\tpublic EmployeeAutowiredByConstructorService(@Qualifier(\"employee\") Employee emp){\r\n\t\tthis.employee=emp;\r\n\t}\r\n\t\r\n\tpublic Employee getEmployee() {\r\n\t\treturn this.employee;\r\n\t}\r\n}\r\n<\/code><\/pre>\n\u5f53Spring\u6846\u67b6\u521d\u59cb\u5316\u8be5bean\u65f6\uff0c\u5c06\u4f7f\u7528\u540d\u79f0\u4e3a”employee”\u7684bean\u8fdb\u884c\u81ea\u52a8\u88c5\u914d\u3002Spring\u7684@Autowired\u6ce8\u89e3\u63a5\u53d7\u4e00\u4e2a\u540d\u4e3a”required”\u7684\u53c2\u6570\uff0c\u5b83\u662f\u4e00\u4e2a\u5e03\u5c14\u503c\uff0c\u9ed8\u8ba4\u503c\u4e3aTRUE\u3002\u6211\u4eec\u53ef\u4ee5\u5c06\u5176\u5b9a\u4e49\u4e3a”false”\uff0c\u8fd9\u6837\u5982\u679c\u6ca1\u6709\u627e\u5230\u9002\u5408\u7684bean\u8fdb\u884c\u81ea\u52a8\u88c5\u914d\uff0cSpring\u6846\u67b6\u5c06\u4e0d\u4f1a\u629b\u51fa\u4efb\u4f55\u5f02\u5e38\u3002<\/p>\n
Spring\u7684@Autowired\u6ce8\u89e3 – Bean\u914d\u7f6e\u6587\u4ef6<\/h3>\n
Spring bean \u914d\u7f6e\u6587\u4ef6\u662f\u4efb\u4f55 Spring \u5e94\u7528\u7a0b\u5e8f\u7684\u4e3b\u8981\u7ec4\u6210\u90e8\u5206\uff0c\u8ba9\u6211\u4eec\u770b\u770b\u6211\u4eec\u7684 Spring bean \u914d\u7f6e\u6587\u4ef6\u7684\u5916\u89c2\uff0c\u7136\u540e\u518d\u9010\u4e2a\u90e8\u5206\u8fdb\u884c\u8ba8\u8bba\u3002<\/p>\n
<?xml version=\"1.0\" encoding=\"UTF-8\"?>\r\n<beans xmlns=\"https:\/\/www.springframework.org\/schema\/beans\"\r\n\txmlns:xsi=\"https:\/\/www.w3.org\/2001\/XMLSchema-instance\"\r\n\txmlns:context=\"https:\/\/www.springframework.org\/schema\/context\"\r\n\txsi:schemaLocation=\"https:\/\/www.springframework.org\/schema\/beans https:\/\/www.springframework.org\/schema\/beans\/spring-beans.xsd\r\n\t\thttps:\/\/www.springframework.org\/schema\/context https:\/\/www.springframework.org\/schema\/context\/spring-context-4.0.xsd\"\r\n\t\t\r\n\t\tdefault-autowire=\"byName\" default-autowire-candidates=\"*\" >\r\n\r\n<bean name=\"employee\" class=\"com.Olivia.spring.autowiring.model.Employee\">\r\n\t<property name=\"name\" value=\"Pankaj\"><\/property>\r\n<\/bean>\r\n\r\n<bean name=\"employee1\" class=\"com.Olivia.spring.autowiring.model.Employee\" autowire-candidate=\"false\">\r\n\t<property name=\"name\" value=\"Dummy Name\"><\/property>\r\n<\/bean>\r\n\r\n<!-- autowiring byName, bean name should be same as the property name -->\r\n<bean name=\"employeeServiceByName\" class=\"com.Olivia.spring.autowiring.service.EmployeeService\" autowire=\"byName\" \/>\r\n\r\n<!-- autowiring byType, there should be only one bean definition for the mapping -->\r\n<bean name=\"employeeServiceByType\" class=\"com.Olivia.spring.autowiring.service.EmployeeService\" autowire=\"byType\" \/>\r\n\r\n<!-- autowiring by constructor -->\r\n<bean name=\"employeeServiceConstructor\" class=\"com.Olivia.spring.autowiring.service.EmployeeService\" autowire=\"constructor\" \/>\r\n\r\n<!-- Enable Annotation based configuration -->\r\n<context:annotation-config \/>\r\n\r\n<!-- using @Autowiring annotation in below beans, byType and constructor -->\r\n<bean name=\"employeeAutowiredByTypeService\" class=\"com.Olivia.spring.autowiring.service.EmployeeAutowiredByTypeService\" \/>\r\n<bean name=\"employeeAutowiredByConstructorService\" class=\"com.Olivia.spring.autowiring.service.EmployeeAutowiredByConstructorService\" \/>\r\n<\/beans>\r\n<\/code><\/pre>\n\u6709\u5173\u4e8eSpring Bean\u914d\u7f6e\u6587\u4ef6\u7684\u91cd\u8981\u8981\u70b9\u662f\uff1a<\/p>\n
\n- beans\u5143\u7d20\u7684default-autowire\u5c5e\u6027\u7528\u4e8e\u5b9a\u4e49\u9ed8\u8ba4\u7684\u81ea\u52a8\u88c5\u914d\u65b9\u6cd5\u3002\u5728\u8fd9\u91cc\u6211\u5c06\u9ed8\u8ba4\u7684\u81ea\u52a8\u88c5\u914d\u65b9\u6cd5\u5b9a\u4e49\u4e3abyName\u3002<\/li>\n
- beans\u5143\u7d20\u7684default-autowire-candidates\u5c5e\u6027\u7528\u4e8e\u63d0\u4f9b\u53ef\u7528\u4e8e\u81ea\u52a8\u88c5\u914d\u7684bean\u540d\u79f0\u6a21\u5f0f\u3002\u4e3a\u7b80\u5355\u8d77\u89c1\uff0c\u6211\u5141\u8bb8\u6240\u6709bean\u5b9a\u4e49\u90fd\u6709\u8d44\u683c\u8fdb\u884c\u81ea\u52a8\u88c5\u914d\uff0c\u4f46\u662f\u6211\u4eec\u53ef\u4ee5\u4e3a\u81ea\u52a8\u88c5\u914d\u5b9a\u4e49\u4e00\u4e9b\u6a21\u5f0f\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u4eec\u53ea\u60f3\u8ba9DAO bean\u5b9a\u4e49\u53c2\u4e0e\u81ea\u52a8\u88c5\u914d\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u5176\u6307\u5b9a\u4e3adefault-autowire-candidates=”*DAO”\u3002<\/li>\n
- autowire-candidate=”false”\u7528\u4e8e\u5728bean\u5b9a\u4e49\u4e2d\u4f7f\u5176\u4e0d\u7b26\u5408\u81ea\u52a8\u88c5\u914d\u7684\u6761\u4ef6\u3002\u5f53\u6211\u4eec\u6709\u591a\u4e2a\u540c\u4e00\u7c7b\u578b\u7684bean\u5b9a\u4e49\uff0c\u5e76\u4e14\u5e0c\u671b\u5176\u4e2d\u4e00\u4e9b\u4e0d\u53c2\u4e0e\u81ea\u52a8\u88c5\u914d\u65f6\uff0c\u8fd9\u5f88\u6709\u7528\u3002\u4f8b\u5982\uff0c\u5728\u4e0a\u9762\u7684spring bean\u914d\u7f6e\u4e2d\uff0c”employee1″ bean\u5c06\u4e0d\u4f1a\u7528\u4e8e\u81ea\u52a8\u88c5\u914d\u3002<\/li>\n
- autowire\u5c5e\u6027\u7684byName\u3001byType\u548cconstructor\u503c\u662f\u4e0d\u8a00\u81ea\u660e\u7684\uff0c\u6ca1\u6709\u4ec0\u4e48\u592a\u591a\u9700\u8981\u89e3\u91ca\u7684\u3002<\/li>\n
- context:annotation-config\u7528\u4e8e\u542f\u7528\u57fa\u4e8e\u6ce8\u89e3\u7684\u914d\u7f6e\u652f\u6301\u3002\u6ce8\u610f\uff0cemployeeAutowiredByTypeService\u548cemployeeAutowiredByConstructorService bean\u6ca1\u6709autowire\u5c5e\u6027\u3002<\/li>\n<\/ul>\n
Spring @Autowired \u6ce8\u89e3 – \u6d4b\u8bd5\u7a0b\u5e8f<\/h3>\n
\u65e2\u7136\u6211\u4eec\u7684Spring\u5e94\u7528\u7a0b\u5e8f\u5df2\u7ecf\u51c6\u5907\u5c31\u7eea\uff0c\u5305\u542b\u4e86\u5404\u79cd\u7c7b\u578b\u7684Spring\u81ea\u52a8\u88c5\u914d\uff0c\u90a3\u4e48\u8ba9\u6211\u4eec\u7f16\u5199\u4e00\u4e2a\u7b80\u5355\u7684\u6d4b\u8bd5\u7a0b\u5e8f\uff0c\u770b\u770b\u5b83\u662f\u5426\u5982\u9884\u671f\u5730\u5de5\u4f5c\u3002<\/p>\n
package com.Olivia.spring.autowiring.main;\r\n\r\nimport org.springframework.context.support.ClassPathXmlApplicationContext;\r\n\r\nimport com.Olivia.spring.autowiring.service.EmployeeAutowiredByConstructorService;\r\nimport com.Olivia.spring.autowiring.service.EmployeeAutowiredByTypeService;\r\nimport com.Olivia.spring.autowiring.service.EmployeeService;\r\n\r\npublic class SpringMain {\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext(\"spring.xml\");\r\n\t\t\r\n\t\tEmployeeService serviceByName = ctx.getBean(\"employeeServiceByName\", EmployeeService.class);\r\n\t\t\r\n\t\tSystem.out.println(\"Autowiring byName. Employee Name=\"+serviceByName.getEmployee().getName());\r\n\t\t\r\n\t\tEmployeeService serviceByType = ctx.getBean(\"employeeServiceByType\", EmployeeService.class);\r\n\t\t\r\n\t\tSystem.out.println(\"Autowiring byType. Employee Name=\"+serviceByType.getEmployee().getName());\r\n\t\t\r\n\t\tEmployeeService serviceByConstructor = ctx.getBean(\"employeeServiceConstructor\", EmployeeService.class);\r\n\t\t\r\n\t\tSystem.out.println(\"Autowiring by Constructor. Employee Name=\"+serviceByConstructor.getEmployee().getName());\r\n\t\t\r\n\t\t\/\/\u6253\u5370\u54c8\u5e0c\u7801\u4ee5\u786e\u8ba4\u6240\u6709\u5bf9\u8c61\u90fd\u662f\u4e0d\u540c\u7c7b\u578b\r\n\t\tSystem.out.println(serviceByName.hashCode()+\"::\"+serviceByType.hashCode()+\"::\"+serviceByConstructor.hashCode());\r\n\t\t\r\n\t\t\/\/\u6d4b\u8bd5@Autowired\u6ce8\u89e3\r\n\t\tEmployeeAutowiredByTypeService autowiredByTypeService = ctx.getBean(\"employeeAutowiredByTypeService\",EmployeeAutowiredByTypeService.class);\r\n\t\t\r\n\t\tSystem.out.println(\"@Autowired byType. Employee Name=\"+autowiredByTypeService.getEmployee().getName());\r\n\r\n\t\tEmployeeAutowiredByConstructorService autowiredByConstructorService = ctx.getBean(\"employeeAutowiredByConstructorService\",EmployeeAutowiredByConstructorService.class);\r\n\t\t\r\n\t\tSystem.out.println(\"@Autowired by Constructor. Employee Name=\"+autowiredByConstructorService.getEmployee().getName());\r\n\r\n\t\tctx.close();\r\n\t}\r\n}\r\n<\/code><\/pre>\n\u8fd9\u4e2a\u7a0b\u5e8f\u5f88\u7b80\u5355\uff0c\u6211\u4eec\u53ea\u662f\u521b\u5efa\u4e86Spring\u5e94\u7528\u4e0a\u4e0b\u6587\uff0c\u5e76\u4f7f\u7528\u5b83\u6765\u83b7\u53d6\u4e0d\u540c\u7684Bean\u5e76\u6253\u5370\u5458\u5de5\u7684\u59d3\u540d\u3002\u5f53\u6211\u4eec\u8fd0\u884c\u4e0a\u8ff0\u5e94\u7528\u7a0b\u5e8f\u65f6\uff0c\u83b7\u5f97\u4ee5\u4e0b\u8f93\u51fa\u3002<\/p>\n
Mar 31, 2014 10:41:58 PM org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh\r\nINFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@3fa99295: startup date [Mon Mar 31 22:41:58 PDT 2014]; root of context hierarchy\r\nMar 31, 2014 10:41:58 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions\r\nINFO: Loading XML bean definitions from class path resource [spring.xml]\r\nDefault Constructor used\r\nDefault Constructor used\r\nAutowiring by constructor used\r\nAutowiring byName. Employee Name=Pankaj\r\nAutowiring byType. Employee Name=Pankaj\r\nAutowiring by Constructor. Employee Name=Pankaj\r\n21594592::15571401::1863015320\r\n@Autowired byType. Employee Name=Pankaj\r\n@Autowired by Constructor. Employee Name=Pankaj\r\nMar 31, 2014 10:41:58 PM org.springframework.context.support.ClassPathXmlApplicationContext doClose\r\nINFO: Closing org.springframework.context.support.ClassPathXmlApplicationContext@3fa99295: startup date [Mon Mar 31 22:41:58 PDT 2014]; root of context hierarchy\r\n<\/code><\/pre>\n\u6b63\u5982\u4f60\u6240\u770b\u5230\u7684\uff0c\u5bf9\u4e8e\u901a\u8fc7\u540d\u79f0\u548c\u7c7b\u578b\u8fdb\u884c\u81ea\u52a8\u88c5\u914d\u7684\u60c5\u51b5\uff0c\u4f7f\u7528\u4e86\u9ed8\u8ba4\u7684\u65e0\u53c2\u6784\u9020\u51fd\u6570\u6765\u521d\u59cb\u5316Bean\u3002\u800c\u5bf9\u4e8e\u901a\u8fc7\u6784\u9020\u51fd\u6570\u8fdb\u884c\u81ea\u52a8\u88c5\u914d\u7684\u60c5\u51b5\uff0c\u5219\u4f7f\u7528\u4e86\u57fa\u4e8e\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\u3002\u901a\u8fc7\u6240\u6709\u53d8\u91cf\u7684\u54c8\u5e0c\u7801\uff0c\u6211\u4eec\u786e\u8ba4\u6240\u6709\u7684Spring Bean\u90fd\u662f\u4e0d\u540c\u7684\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u800c\u4e0d\u662f\u5f15\u7528\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002\u7531\u4e8e\u6211\u4eec\u4ece\u53ef\u81ea\u52a8\u88c5\u914d\u7684Bean\u5217\u8868\u4e2d\u79fb\u9664\u4e86”employee1″\uff0c\u6240\u4ee5\u5728Bean\u6620\u5c04\u4e2d\u6ca1\u6709\u4efb\u4f55\u6df7\u6dc6\u3002\u5982\u679c\u6211\u4eec\u4ece”employee1″\u7684\u5b9a\u4e49\u4e2d\u79fb\u9664autowire-candidate=”false”\u5c5e\u6027\uff0c\u5f53\u6267\u884c\u4ee5\u4e0a\u7684main\u65b9\u6cd5\u65f6\uff0c\u6211\u4eec\u5c06\u4f1a\u5f97\u5230\u4e0b\u9762\u7684\u9519\u8bef\u4fe1\u606f\u3002<\/p>\n
\u7ebf\u7a0b\"main\"\u4e2d\u7684\u5f02\u5e38 org.springframework.beans.factory.UnsatisfiedDependencyException: \u521b\u5efa\u5728\u7c7b\u8def\u5f84\u8d44\u6e90[spring.xml]\u4e2d\u5b9a\u4e49\u7684\u540d\u4e3a'employeeServiceByType'\u7684bean\u65f6\u51fa\u9519: \u901a\u8fc7bean\u5c5e\u6027'employee'\u8868\u793a\u7684\u4e0d\u6ee1\u8db3\u4f9d\u8d56: : \u6ca1\u6709\u5b9a\u4e49\u7c7b\u578b\u4e3a[com.Olivia.spring.autowiring.model.Employee]\u7684\u9650\u5b9abean: \u671f\u671b\u627e\u5230\u5355\u4e2a\u5339\u914dbean\u4f46\u627e\u5230\u4e862\u4e2a: employee,employee1; \u5d4c\u5957\u5f02\u5e38\u662f org.springframework.beans.factory.NoUniqueBeanDefinitionException: \u6ca1\u6709\u5b9a\u4e49\u7c7b\u578b\u4e3a[com.Olivia.spring.autowiring.model.Employee]\u7684\u9650\u5b9abean: \u671f\u671b\u627e\u5230\u5355\u4e2a\u5339\u914dbean\u4f46\u627e\u5230\u4e862\u4e2a: employee,employee1\r\n\tat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByType(AbstractAutowireCapableBeanFactory.java:1278)\r\n\tat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1170)\r\n\tat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)\r\n\tat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)\r\n\tat org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)\r\n\tat org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)\r\n\tat org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)\r\n\tat org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)\r\n\tat org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)\r\n\tat org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)\r\n\tat org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)\r\n\tat org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)\r\n\tat org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)\r\n\tat com.Olivia.spring.autowiring.main.SpringMain.main(SpringMain.java:12)\r\n\u539f\u56e0: org.springframework.beans.factory.NoUniqueBeanDefinitionException: \u6ca1\u6709\u5b9a\u4e49\u7c7b\u578b\u4e3a[com.Olivia.spring.autowiring.model.Employee]\u7684\u9650\u5b9abean: \u671f\u671b\u627e\u5230\u5355\u4e2a\u5339\u914dbean\u4f46\u627e\u5230\u4e862\u4e2a: employee,employee1\r\n\tat org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:967)\r\n\tat org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:855)\r\n\tat org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByType(AbstractAutowireCapableBeanFactory.java:1263)\r\n\t... 13 more\r\n<\/code><\/pre>\n\u5173\u4e8eSpring\u7684@Autowired\u6ce8\u89e3\u548c\u81ea\u52a8\u88c5\u914d\u7279\u6027\uff0c\u5c31\u8bf4\u5230\u8fd9\u91cc\u4e86\uff0c\u8bf7\u4ece\u4e0b\u9762\u7684\u94fe\u63a5\u4e0b\u8f7d\u793a\u4f8b\u9879\u76ee\u8fdb\u884c\u5206\u6790\uff0c\u4ee5\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n
\u4e0b\u8f7dSpring Bean\u81ea\u52a8\u88c5\u914d\u9879\u76ee<\/p>\n","protected":false},"excerpt":{"rendered":"
Spring\u7684@Autowired\u6ce8\u89e3\u7528\u4e8e\u81ea\u52a8\u4f9d\u8d56\u6ce8\u5165\u3002Spring\u6846\u67b6\u662f\u5efa\u7acb\u5728\u4f9d\u8d56\u6ce8\u5165\u57fa\u7840\u4e0a\u7684\uff0c\u6211\u4eec\u901a\u8fc7Sp […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1968,761,1089,1547,1969],"class_list":["post-713","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-autowired","tag-java","tag-spring","tag-1969"],"yoast_head":"\n
Spring\u6846\u67b6@Autowired\u6ce8\u89e3\u8be6\u89e3\uff1a\u4f9d\u8d56\u6ce8\u5165\u7684\u6838\u5fc3\u5b9e\u73b0 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u6df1\u5165\u89e3\u6790Spring\u6846\u67b6\u4e2d@Autowired\u6ce8\u89e3\u7684\u4f7f\u7528\u65b9\u6cd5\u548c\u539f\u7406\uff0c\u4e86\u89e3\u5982\u4f55\u901a\u8fc7@Autowired\u5b9e\u73b0\u4f9d\u8d56\u6ce8\u5165\uff0c\u638c\u63e1Spring\u6846\u67b6\u6838\u5fc3\u6ce8\u89e3\u7684\u5e94\u7528\u6280\u5de7\uff0c\u63d0\u5347Java\u5f00\u53d1\u6548\u7387\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u6625\u5b63\u6ce8\u89e3autowired\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spring\u6846\u67b6@Autowired\u6ce8\u89e3\u8be6\u89e3\uff1a\u4f9d\u8d56\u6ce8\u5165\u7684\u6838\u5fc3\u5b9e\u73b0\" \/>\n<meta property=\"og:description\" content=\"\u6df1\u5165\u89e3\u6790Spring\u6846\u67b6\u4e2d@Autowired\u6ce8\u89e3\u7684\u4f7f\u7528\u65b9\u6cd5\u548c\u539f\u7406\uff0c\u4e86\u89e3\u5982\u4f55\u901a\u8fc7@Autowired\u5b9e\u73b0\u4f9d\u8d56\u6ce8\u5165\uff0c\u638c\u63e1Spring\u6846\u67b6\u6838\u5fc3\u6ce8\u89e3\u7684\u5e94\u7528\u6280\u5de7\uff0c\u63d0\u5347Java\u5f00\u53d1\u6548\u7387\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u6625\u5b63\u6ce8\u89e3autowired\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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