Jackson学习(一) 美化/输出JSON

1、引入Maven依赖

<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-databind</artifactId>
  <version>2.7.4</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-core</artifactId>
  <version>2.7.4</version>
</dependency>
<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-annotations</artifactId>
  <version>2.7.4</version>
</dependency>

2、创建实体类

public class User {
  private String userName;
  private String passWord;
  @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
  private Date createTime;
  private Integer type;

  public User() {
  }

  public User(String userName, String passWord, Date createTime, Integer type) {
    this.userName = userName;
    this.passWord = passWord;
    this.createTime = createTime;
    this.type = type;
  }

  public String getUserName() {
    return userName;
  }

  public void setUserName(String userName) {
    this.userName = userName;
  }

  public String getPassWord() {
    return passWord;
  }

  public void setPassWord(String passWord) {
    this.passWord = passWord;
  }

  public Date getCreateTime() {
    return createTime;
  }

  public void setCreateTime(Date createTime) {
    this.createTime = createTime;
  }

  public Integer getType() {
    return type;
  }

  public void setType(Integer type) {
    this.type = type;
  }

3、创建Test

public class Test {
  public static void main(String[] args) {
    User user = new User();
    user.setUserName("kosi");
    user.setPassWord("123456");
    user.setCreateTime(new Date());
    user.setType(1);

    ObjectMapper mapper = new ObjectMapper();
    try {
      System.out.println(mapper.writerWithDefaultPrettyPrinter().writeValueAsString(user));
    } catch (JsonProcessingException e) {
      e.printStackTrace();
    }
  }
}

4、效果图