该文章为原创（转载请注明出处）：如何使SpringMVC的表单和get申请参数反对json转换？ - 简书 (jianshu.com)
实在业务场景
前端申请须要表单传递json字符串或者get申请参数携带了json字符串的数据
后端只能在格局上做斗争？
例如：
前端表单
userJson:{"name":"xxx", "phone":"123"}前端Get申请
/user/test?userJson=%7B%22name%22%3A%22xxx%22%2C%20%22phone%22%3A%22123%22%7D 后端接管表单1
@GetMapping("test.do")public RestResponse<Void> test(@ModelAttribute String userJson) { body.setUser(JSON.parseObject(userJson, User.class)); // service.handleUser(body);}@Datastatic class User { private String phone; private String name;}后端接管表单2
@GetMapping("test.do")public RestResponse<Void> test(@ModelAttribute TestBody body) { body.setUser(JSON.parseObject(body.getUserJson(), User.class)); // service.handleUser(body);} @Datastatic class TestBody { private String userJson;}static class User { private String phone; private String name;}后端接管Get申请
@GetMapping("test.do")public RestResponse<Void> test(@RequestParam String userJson) { body.setUser(JSON.parseObject(userJson, User.class)); // service.handleUser(body);}@Datastatic class User { private String phone; private String name;}反对json的解决方案
利用springmvc提供的@ControllerAdvice切面，在WebDataBinder中退出应用json反序列化的形式
来进行string与各种类型的转换
package com.nuonuo.accounting.guiding.support.spring;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.parser.ParserConfig;import com.alibaba.fastjson.util.TypeUtils;import org.springframework.core.convert.TypeDescriptor;import org.springframework.core.convert.converter.GenericConverter;import org.springframework.core.convert.support.GenericConversionService;import org.springframework.web.bind.WebDataBinder;import org.springframework.web.bind.annotation.ControllerAdvice;import org.springframework.web.bind.annotation.InitBinder;import org.springframework.web.bind.annotation.ModelAttribute;import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter;import java.util.Set;import static java.util.Collections.singleton;/** * Fastjson来主动绑定参数 * 反对表单、get申请参数 * * @author uhfun * @see RequestMappingHandlerAdapter#initControllerAdviceCache() * 寻找@ControllerAdvice切面下@InitBinder注解的办法 * @see org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#INIT_BINDER_METHODS * @see org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#getDataBinderFactory(org.springframework.web.method.HandlerMethod) * 依据切面构建InitBinderMethod办法 * @see org.springframework.web.method.annotation.InitBinderDataBinderFactory#initBinder * 初始化binder时反射调用 * @see ModelAttribute */@ControllerAdvicepublic class StringToAnyObjectSupport { private static volatile boolean INITIALIZED = false; @InitBinder public void initStringToAnyObjectConverter(WebDataBinder dataBinder) { GenericConversionService conversionService; if (dataBinder.getConversionService() instanceof GenericConversionService) { if (!INITIALIZED) { conversionService = (GenericConversionService) dataBinder.getConversionService(); conversionService.addConverter(new StringToAnyObjectConverter()); INITIALIZED = true; } } else { throw new IllegalStateException("dataBinder的ConversionService不是GenericConversionService类型实例"); } } static class StringToAnyObjectConverter implements GenericConverter { @Override public Set<ConvertiblePair> getConvertibleTypes() { return singleton(new ConvertiblePair(String.class, Object.class)); } @Override public Object convert(Object source, TypeDescriptor sourceType, TypeDescriptor targetType) { Class<?> type = targetType.getType(); if (TypeUtils.getClassFromMapping(type.getName()) != null) { return TypeUtils.cast(source, type, ParserConfig.getGlobalInstance()); } else { return JSON.parseObject((String) source, type); } } }}如何应用？
后端接管表单1
@GetMapping("test.do")public RestResponse<Void> test(@ModelAttribute("userJson") User user) {} static class User { private String phone; private String name;}后端接管表单2
@GetMapping("test.do")public RestResponse<Void> test(@ModelAttribute TestBody body) { User user = body.getUserJson(); // service.handleUser(body);} @Datastatic class TestBody { private User userJson;}static class User { private String phone; private String name;}后端接管Get申请
@GetMapping("test.do")public RestResponse<Void> test(@RequestParam User userJson) { }@Datastatic class User { private String phone; private String name;}该文章为原创（转载请注明出处）：如何使SpringMVC的表单和get申请参数反对json转换？ - 简书 (jianshu.com)