Question

我正在使用Spring（RESTful API），我希望将POJO的JSON输出用小写字母替换为camelcase的小写：

例如为： PhotoUpload：

package com.rh.dao.entity;

/**
 *
 * @author fabianlurz
 */
public class PhotoUpload {
    private String imageUrl;    

    /**
     * @return the imageUrl
     */
    public String getImageUrl() {
        return imageUrl;
    }

    /**
     * @param imageUrl the imageUrl to set
     */
    public void setImageUrl(String imageUrl) {
        this.imageUrl = imageUrl;
    }
}

因此imageUrl应该是image_url（也适用于传入的对象 - ＆gt;映射）

有没有办法在全球范围内进行此配置？（不想使用JsonProperty注释）

我的pom.xml：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.javahonk</groupId>
    <artifactId>migranthire_api_v2.0</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>migranthire_api_v2.0</name>
    <url>http://maven.apache.org</url>
    <properties>
        <junit.version>3.8.1</junit.version>
        <SpringVersion>4.0.6.RELEASE</SpringVersion>
        <spring-jdbc.version>4.0.6.RELEASE</spring-jdbc.version>
        <json.version>20140107</json.version>
        <jackson.version>1.9.10</jackson.version>
        <log4j.version>1.2.16</log4j.version>
        <jtds.version>1.2</jtds.version>
        <net.sf.json.version>2.4</net.sf.json.version>   
        <spring.security.version>4.0.2.RELEASE</spring.security.version> 
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <!-- Spring dependencies -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${SpringVersion}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${SpringVersion}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${SpringVersion}</version>
        </dependency>
        <!-- Spring and Transactions -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring-jdbc.version}</version>
        </dependency>

        <!-- Jackson JSON Mapper -->
        <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>${json.version}</version>
        </dependency>
        <dependency>
            <groupId>net.sourceforge.jtds</groupId>
            <artifactId>jtds</artifactId>
            <version>${jtds.version}</version>
        </dependency>
        <!-- MySql 5.5 Connector -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.29</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>com.zaxxer</groupId>
            <artifactId>HikariCP-java6</artifactId>
            <version>2.3.9</version>
        </dependency> 
        <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>${net.sf.json.version}</version>
            <classifier>jdk15</classifier>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-core</artifactId>
            <version>${spring.security.version}</version>
        </dependency> 
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>jstl-api</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
        </dependency>
        <dependency>
            <groupId>commons-validator</groupId>
            <artifactId>commons-validator</artifactId>
            <version>1.4.0</version>
        </dependency>    
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-web</artifactId>
            <version>4.0.4.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
            <version>4.0.4.RELEASE</version>
        </dependency>  
        <dependency>
            <groupId>com.cloudinary</groupId>
            <artifactId>cloudinary-http44</artifactId>
            <version>1.4.1</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>migranthire_api_v2.0</finalName>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
                <version>3.1</version>
            </plugin>
        </plugins>
    </build>
</project>

Answer 1

您需要配置Spring的Jackson http消息转换器使用的Jackson ObjectMapper，以使用不同的属性命名策略。

objectMapper.setPropertyNamingStrategy(new PropertyNamingStrategy.LowerCaseWithUnderscoresStrategy())

您可以在XML或java配置中全局设置它。究竟要做到这一点取决于Spring MVC版本，无论您是使用XML配置还是Java配置，无论您是使用Spring Boot还是常规Spring MVC等。有很多关于堆栈溢出的问题可以提供答案不同的组合。

在XML配置中执行此操作的方法之一是：

    <mvc:annotation-driven>
        <mvc:message-converters register-defaults="true">
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                <property name="objectMapper">
                    <ref bean="objectMapper" />
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>


    <bean id="objectMapper" class="org.springframework.http.converter.json.Jackson2ObjectMapperFactoryBean" autowire="no">
        <property name="propertyNamingStrategy" value="CAMEL_CASE_TO_LOWER_CASE_WITH_UNDERSCORES" />
    </bean>

使用下划线Spring将隐藏的文件转换为小写

1 个答案: