spring propertyplaceholderconfigurer annotation example

")); }personjpa.save (Personrecord); return 4l;}}Note: It is important to note that if there is no configuration, an exception will occur when the associated table changes.Org.hibernate.HibernateException:Could not obtain transaction-synchronized Session for current threadThis is required in the spring transaction implementation to determine whether the transaction in the current thread is synchronized, and when there is no transaction, the method tha

use annotation in Spring MVC to jump to another action in the actionThe return value of the method in action is a string line, and the general case is to return a JSP, such as:return "XX": it means returning to a JSP pageWhat if you want to jump to another action in this action? return "Redirect://.do?"For example:@RequestMapping (params="Action=delete") PublicS

Copyright NOTICE: This article for Bo Master original article, if need reprint please label reprint address. Blog address:http://www.cnblogs.com/caoyc/p/5626365.html@Autowired annotation, it can annotate class member variables, methods, and constructors to complete the work of automatic assembly. Use the @Autowired to eliminate the set, get method. Before we use @autowired, we configure a bean as a property.name= "Property name" value= "Property valu

Spring supports staging file uploads in Web applications. This support is implemented by Plug and Play multipartresolver. In Spring2.0, Spring offers two out-of-the-box multipartresolver 1.Commons FileUpload (http://jakarta.apache.org/commons/fileupload) 2. COS FileUpload (Http://www.servlets.com/cos) However, after spring2.5, only the Commons FileUpload is supported. So, how do you use Multipartresolver

There are many annotations for spring. Today we will introduce the following commonly used annotations for spring mvc. @ Controller registers a bean to the spring context. The bean ID starts with a class name in lowercase by default. You can also specify it by yourself. method 1 is as follows: @ Controller public class TestController {} Method 2: @ Controller ("t

Description Annotations are a class in spring, using the @+ annotation nameIn development, annotations can be used instead of XML configurations. more efficient and quick.If you make the annotation effective, you configure the namespace's declaration and scan information in the XML. @Component replaces IOC configuration (bean) in XML Let's give an

This article highlights the example code of Spring boot MyBatis annotation1, Pom.xml// Introducing MyBatis1.3. 0// mybatis page plug-ins 1.1 . 12. Basic SQL OperationsSpring boot has automatically implemented all MyBatis configurations, directly writing the DAO interface@Mapper Public Interface Mybatisdao { @Select ("select * from user where id = #{id}") Public list@Mapper: Declares a MyBatis DAO i

Since JDK5.0 introduced annotations (Annotation), Java development has been simplified a lot, allowing developers to almost get rid of complex Trouble with configuration files. This article describes the set of annotations that spring provides equivalent to the Commons Attribut attribute class and the implementation class annotationsjmxattributesource of a policy interface jmxattributesource that allows Mb

Methodx () {testentitydao.mmm (); testentitydao.nnn ();} public void Methody () {}} assumes that the method Methodx requires transaction control, and usually we add @transactional annotations directly on the method. However, it seems that the transactional annotation before spring3.0 (the specific version is not clear) does not support distinguishing which transaction manager to use. Version transactional after 3.0 adds a string type of Value propert

the class, so will meet the requirements, then the program is tangled: exactly whether the assembly ID is Userdao bean or assembly ID isUserdao2 Bean, slow down the decision, had to error!!! So use caution ~ ~In addition there is a default-auto-wire= "byname" defined in the beans tag, which is equivalent to a global declaration that tells all the bean tags to be used I sayTo assemble in a declarative manner.3. Annotation assemblyannotation annotation

Filter Type Examples Expression Description Annotation Org.example.SomeAnnotation Target class conforming to Someannoation Assignable Org.example.SomeClass Specify the full name of class or interface Aspectj Org.example. *service+ AspectJ Language method Regex Org\.example\. default.* Regelar Expres

of the AOP, the more executed first. (Chain mode)，So we need to add the Order property to/> in 。 This is a transaction nesting.So let's look at the example above: When a Class (Test) is using @transactional in a Oddtech.service.impl package, we want the Insert method to be read-only, Read-only=true, So we need to define this: @Transactional (readOnly = true,propagation=propagation.required), why?In a declarative transaction, our transaction propagati

Spring MVC reads the configuration content of. properties through the @ Value annotation, @ value. properties Step 1: Configure in applicationContext. xml: 1 Step 2: Create a configuration file: Example: userPageSize = 5 Step 3: Use annotations in the Controller to obtain the configuration item content: 1 @Value("#{configProperties['userPageSize']}")2 priva

) { User user = Userservice.login (username, password) ; return user; }Here I use the Jackson Bag:(1) Jackson-core 2.5.0(2) Jackson-databind 2.5.0(3) Jackson-annotations 2.5.0After importing build path;Warning: If you use an ORM tool such as hibernate to generate a Pojo class, one-to-one, a multi-level relationship may output an infinite loop of JSON:You need to use import Com.fasterxml.jackson.annotation.JsonIgnore in the Pojo class and add @jsonignore annotations for classes t

appropriately to have transactional behavior. In the above example, it is the presence of the element that opens the transaction behavior.5. The spring team's recommendation is that you use @Transactional annotations on specific classes (or methods of classes) rather than on any interface that the class implements. You can certainly use @Transactional annotations on the interface, but this will only take e

= ' name ', column = ' name '), @Result (property = ' age ', column = ' Age ')}) @Select (" Select name, age from User ") listIn the preceding code, the property attribute in the @Result corresponds to the member name in the user object, and column corresponds to the field name of the Select. The id attribute is intentionally not detected in this configuration, only the name and age objects in the user counterpart are mapped, so that the ID identified is null by the following unit test, and

1. When importing Jar packages, add Spring-aop-4.2.2.release.jar on the XML configuration (required for Annotations)2. When writing a controller, the annotation need to do the relevant configuration is the red part, and XML is to implement the Controller interface(a) when the annotation is configuredPackage Com.spring.hello;import Javax.servlet.http.httpservletre

());} else {System.out.println (cake);} return cake;} public void SetName (String name) {this.name = name;}}It is important to note that the @Autowired tag is the default force injection of non-empty objects, but we can inject a null object through the Required=false property2. Test class: (unchanged)Package Com.raylee.my_new_spring.my_new_spring.ch02.topic_1_9;import Org.junit.test;import Org.junit.runner.runwith;import Org.springframework.beans.factory.annotation.autowired;import Org.springfr

Spring relies on checking that the bean profile is used to determine that all properties of a particular type (base, collection, or object) are set. In most cases, you only need to make sure that a specific property has been set but not all properties: In this case, you need to @Required annotations, see the example below: @Required example Customer object, appli

Spring-mvc How to use interceptors, official documents give only examples of non-annotation styles. So how do you use interceptors based on the annotation style? Based on annotations There are basically 2 defined classes that can be used, namely defaultannotationhandlermapping and Annotationmethodhandleradapter: 1、DefaultAnnotationHandlerMapping The default