转换器和格式要求及传参jackson之页面

   

• @Controller //转换器   例如 user{id,name,age}  ,请求1-zs-23.  
• public class ServletConvert {
•     @RequestMapping("MyConvert")
•     public String convert(@RequestParam("stu")Student stu){
•         System.out.println(stu);
•         return "MyJsp";
•     }
•  
•     //自定义转换器，实现Converter接口
• public class MyConvert implements Converter<String,Student>{
•         @Override
•         public Student convert(String source) {
•             String[] str = source.split("-");
•             System.out.println(str);
•             Student stu = new Student();
•             stu.setId(Integer.parseInt(str[0]));
•             stu.setName(str[1]);
•             return stu;
•         }
•     }
• }

• @Controller //转换器   例如 user{id,name,age}  ,请求1-zs-23.  
  • public class ServletConvert {
  •     @RequestMapping("MyConvert")
  •     public String convert(@RequestParam("stu")Student stu){
  •         System.out.println(stu);
  •         return "MyJsp";
  •     }

       

  •   //自定义转换器，实现Converter接口
  • public class MyConvert implements Converter<String,Student>{
  •         @Override
  •         public Student convert(String source) {
  •             String[] str = source.split("-");
  •             System.out.println(str);
  •             Student stu = new Student();
  •             stu.setId(Integer.parseInt(str[0]));
  •             stu.setName(str[1]);
  •             return stu;
  •         }
  •     }
  • }

   

   

   

•     <!--  springmvc的配置 -->
•     <!-- 配置该注解可以解决很多兼容问题并存问题
• conversion-service="ConversionService"  将转换器加入到mvc中IOC转换器
• 统一管理器的class=org.springframework.format.support.FormattingConversionServiceFactoryBean
• //全部可以转换
• //自定义类型转化，数据转换不了 org.springframework.context.support.ConversionServiceFactoryBean
• -->
•         <mvc:annotation-driven conversion-service="conversionService"></mvc:annotation-driven>
•         <!-- 自定义转化器 -->
•         <!-- 第一步,将自定义myConvert纳入IOC容器 -->
•             <bean id="myConvert" class="cn.tri.convert.MyConvert"></bean>
•         <!-- 第二步 ，将自定义转换器加入到统一管理器中-->
•             <!-- <bean id="conversionService" class="org.springframework.format.support.ConversionServiceFactoryBean"> -->
•             <bean id="conversionService" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
•                 <property name="converters">
•                     <set>
•                         <ref bean="myConvert"/>
•                     </set>
•                 </property>
•             </bean>

   

   

   

   

•     @RequestMapping("testDateTimeFormat")
•     public String testDateTimeFormat(Student stu,BindingResult result){
•         System.out.println(stu);
•         if(result.getErrorCount() > 0){ // 错误信息总数大于1条，将遍历打印
• for (FieldError error : result.getFieldErrors()) {
•                 System.out.println(error.getDefaultMessage());
•             }
•         }
•         return "MyJsp";
•     }

   

   

   

   

•     @ResponseBody     //此注解直接像页面写值
• @RequestMapping("testAjaxJson")   //因为添加了jackson.jar  返回为List,实际为到达页面后为json
• public List<Student> testAjaxJson(){
•         System.out.println("------------join---testAjaxJson-------------");
•         Student stu1 = new Student(1, "zs", new Date(), null);
•         Student stu2 = new Student(1, "ls", new Date(), null);
•         Student stu3 = new Student(1, "ww", new Date(), null);
•         List<Student> list = new ArrayList<>();
•         list.add(stu1);
•         list.add(stu2);
•         list.add(stu3);
•         return list;
•     }

   

•     //ajax请求
•     <script type="text/javascript">
•        $(document).ready(function(){
•       $("#btn1").click(function(){
•        $.post(
•       "testAjaxJson",
•        function (result){//json数组
                              for (var i = 0; i < result.length; i++) {
•                              console.log(result[i].id+"---"+result[i].name+"---"+result[i].birthday);
•                              alert(result[i].id+"---"+result[i].name+"---"+result[i].birthday);
•                          }
•                      }
•        );
•        });
•        });
•       </script>