SpringApplicationBuilder作用，以及设置跨域请求过滤器

https://blog.csdn.net/qq_42714869/article/details/93052175

springboot项目，若打包成war包，使用外置的tomcat启动

1、需要继承 org.springframework.boot.context.web.SpringBootServletInitializer类

2、然后重写configure(SpringApplicationBuilder application)方法

1.  
   import org.mybatis.spring.annotation.MapperScan;
2.  
   import org.springframework.boot.SpringApplication;
3.  
   import org.springframework.boot.autoconfigure.SpringBootApplication;
4.  
   import org.springframework.boot.builder.SpringApplicationBuilder;
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   import org.springframework.boot.web.servlet.FilterRegistrationBean;
6.  
   import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
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   import org.springframework.cache.annotation.EnableCaching;
8.  
   import org.springframework.context.annotation.Bean;
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   import org.springframework.core.annotation.Order;
10.  
    import org.springframework.scheduling.annotation.EnableAsync;
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    import org.springframework.web.cors.CorsConfiguration;
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    import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
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    import org.springframework.web.filter.CorsFilter;
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15.  
    import com.upincar.dms.filter.CharacterEncodingFilter;
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17.  
    /**
18.  
    *
19.  
    * @Description:启动类
20.  
    */
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    @SpringBootApplication
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    @EnableAsync
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    @MapperScan(basePackages = "com.upincar.dms.user.dao", sqlSessionFactoryRef = "sqlSessionFactory")
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    public class DmsApplication extends SpringBootServletInitializer {
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    public static void main(String[] args) {
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    try{
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    SpringApplication.run(DmsApplication.class, args);
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    } catch (Exception e) {
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    e.printStackTrace();
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    }
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33.  
    }
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36.  
    /**
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    * 如此配置打包后可以war包才可在tomcat下使用
38.  
    * @param application
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    * @return
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    */
41.  
    @Override
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    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
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    return application.sources(DmsApplication.class);
44.  
    }
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47.  
    /**
48.  
    * 设置全局UTF-8编码过滤器
49.  
    * @return
50.  
    */
51.  
    @Bean
52.  
    @Order(Integer.MAX_VALUE)//设置执行先后顺序
53.  
    public FilterRegistrationBean<CharacterEncodingFilter> characterFilterRegistration() {
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    FilterRegistrationBean<CharacterEncodingFilter> registration = new FilterRegistrationBean<CharacterEncodingFilter>();
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    registration.setFilter(new CharacterEncodingFilter());
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    registration.addUrlPatterns("/*");
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    registration.addInitParameter("paramName", "paramValue");
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    registration.setName("characterEncodingFilter");
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    return registration;
60.  
    }
61.  
     
62.  
     
63.  
    /**
64.  
    * 跨域过滤器
65.  
    *
66.  
    * @return
67.  
    */
68.  
    @Bean
69.  
    public CorsFilter corsFilter() {
70.  
    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
71.  
    source.registerCorsConfiguration("/**", buildConfig());
72.  
    return new CorsFilter(source);
73.  
    }
74.  
     
75.  
    private CorsConfiguration buildConfig() {
76.  
    CorsConfiguration corsConfiguration = new CorsConfiguration();
77.  
    corsConfiguration.addAllowedOrigin("*");
78.  
    corsConfiguration.addAllowedHeader("*");
79.  
    corsConfiguration.addAllowedMethod("*");
80.  
    corsConfiguration.setMaxAge(3600L);
81.  
    corsConfiguration.addExposedHeader("x-requested-with");
82.  
    return corsConfiguration;
83.  
    }
84.  
     
85.  
    }