SSM No converter found for return value of type

最新推荐文章于 2022-03-12 21:11:03 发布

原创最新推荐文章于 2022-03-12 21:11:03 发布 · 776 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#java

本文详细描述了在Spring MVC中遇到的由于@AnnotationDriven配置不当导致的约束错误，并提供了初始化时正确配置Spring MVC和MyBatis的方法，包括web.xml中DispatcherServlet的设置和Spring配置类的编写实例。

问题原因为 mvc：annotation driven引错了约束

记录下，只需要在开始在初始化时读取springmvc的配置文件即可，不需要错综复杂的操作

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:application.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app

然后Spring部分，搞个配置类，导入mybatis相关的组件

@ComponentScan(basePackages = "com.sifa")
@Configuration
public class MybatisAndResourceConfig{

    @Bean("datasource")
    public DruidDataSource getDataSource(){
        DruidDataSource dataSource=new DruidDataSource();
        dataSource.setUrl("jdbc:mysql://localhost:3306/test?characterEncoding=utf8");
        dataSource.setUsername("root");
        dataSource.setPassword("123456");
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        return dataSource;
    }
    @Bean
    public SqlSessionFactoryBean getSqlSessionFactoryBean(DataSource dataSource){
        SqlSessionFactoryBean sqlSessionFactoryBean=new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource);
        return sqlSessionFactoryBean;
    }
    @Bean
    public MapperScannerConfigurer getMapperScannerConfig(){
        MapperScannerConfigurer mapperScannerConfigurer=new MapperScannerConfigurer();
        mapperScannerConfigurer.setSqlSessionFactoryBeanName("getSqlSessionFactoryBean");
        mapperScannerConfigurer.setBasePackage("com.sifa.dao");
       return mapperScannerConfigurer;
    }

    @Bean
    public DataSourceTransactionManager getDataSourceTransactionManager(DataSource dataSource){
        DataSourceTransactionManager dataSourceTransactionManager=new DataSourceTransactionManager();
        dataSourceTransactionManager.setDataSource(dataSource);
        return  dataSourceTransactionManager;
    }
}