idea and spring5 stepped pit

ssm json data transfer type and Integration

<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
 <artifactId>jackson-core</artifactId>
 <version>2.9.8</version>
</dependency>

<dependency>
 <groupId>com.fasterxml.jackson.core</groupId>
 <artifactId>jackson-databind</artifactId>
 <version>2.9.8</version>
</dependency>

<dependency>
 <groupId>com.fasterxml.jackson.core</groupId>
 <artifactId>jackson-annotations</artifactId>
 <version>2.9.8</version>
</dependency>

依赖这三个第三方jar包即可,Springmvc-xml no longer necessary to configure 

the Controller annotate layer, to complete the transmission format, such as front and rear ends json:

@RequestMapping("/updatepwd")
public @ResponseBody boolean updatepwd(Coach coach){
    boolean flag = false;
    if(coachService.updateByPrimaryKeySelective(coach)==1){
        flag = true;
 }else {
 flag = false;
 }
 return flag;
}

@ResponseBody annotation was compiled for the return json data format, such as the previous stage can accept a ajax json format 

if the method parameters to accept json format data, annotate parameters before @RequestBody