jersy restful webservice快速入门Demo（带pom文件）

pom.xml文件
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>cn.yang.jersyTest</groupId>
    <artifactId>jersyTest</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>jersyTest Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <repository>
        <id>snapshot-repository.java.net</id>
        <name>Java.net Snapshot Repository for Maven</name>
        <url>https://maven.java.net/content/repositories/snapshots/</url>
        <layout>default</layout>
    </repository>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-grizzly2-http</artifactId>
            <version>2.22.1</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-grizzly2-servlet</artifactId>
            <version>2.22.1</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-jdk-http</artifactId>
            <version>2.22.1</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-simple-http</artifactId>
            <version>2.22.1</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-jetty-http</artifactId>
            <version>2.22.1</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-jetty-servlet</artifactId>
            <version>2.22.1</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-moxy</artifactId>
            <version>2.22.1</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>jersyTest</finalName>
    </build>
</project>



web.xml文件
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems,Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
    <display-name>Archetype Created Web Application</display-name>
    <filter>
        <filter-name>Set Character Encoding</filter-name>
        <filter-class>cn.yang.test.CharactorFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>Set Character Encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <servlet>
        <servlet-name>jersy-restful</servlet-name>
        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>jersey.config.server.provider.packages</param-name>
            <param-value>cn.yang.test</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>jersy-restful</servlet-name>
        <url-pattern>/jersy/*</url-pattern>
    </servlet-mapping>
</web-app>





实体类
package cn.yang.test;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Book {
    private String name;
    private String price;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPrice() {
        return price;
    }
    public void setPrice(String price) {
        this.price = price;
    }

}




中文乱码
package cn.yang.test;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

public class CharactorFilter implements Filter { //继承Filter类
    //字符编码
    String encoding=null;

    public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain) throws IOException,ServletException {
        if(encoding!=null){
        //设置request字符编码
            request.setCharacterEncoding(encoding);
         //设置response字符编码
            response.setContentType("text/html;charset="+encoding);
        }
     //传递给下一个过滤器
        chain.doFilter(request,response);

    }

    public void init(FilterConfig filterConfig) throws ServletException {
      //获取初始化参数
        encoding=filterConfig.getInitParameter("encoding");

    }

    public void destroy() {
        // TODO Auto-generated method stub
        encoding=null;
    }

}

package cn.yang.test;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
@Path("/index")
public class JersyDemo {
        @GET
        @Path("/hello1")
        @Produces("text/plain")
        public String getHello() {
            return "Hello World!";
        }
        @GET
        @Path("/hello2")
        @Produces("text/plain")
        public String getHello2() {
            return "Hello World2!";
        }
        @GET
        @Path("/hello3")
        @Produces(MediaType.APPLICATION_JSON)
        public Book getHello3() {
            Book book = new Book();
            book.setName("爵迹");
            book.setPrice("35.65$");
            return book;
        }



}

运行结果图

实体类里面包含实体类的写法

package cn.yang.test;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Book {
    private String name;
    private String price;


    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPrice() {
        return price;
    }
    public void setPrice(String price) {
        this.price = price;
    }

    private Details details;
    public void setDetails(Details details) {
        this.details = details;
    }
    public Details getDetails() {
        return details;
    }
}

package cn.yang.test;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Details {
    private String description;
    private String num;
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }
    public String getNum() {
        return num;
    }
    public void setNum(String num) {
        this.num = num;
    }
    public Details(String description,String num) {
        super();
        this.description = description;
        this.num = num;
    }
注意如果提供了有参的构造器 那么无参数的构造器一定要提供 否则会报这种错误
MessageBodyWriter not found for media type=application/json。。。。。

原因：没有无参构造器会导致对这个类执行反射操作时会失败（类比所有的框架基本上都会用到反射，所以写实体类的时候一定要注意无参构造器一定要有）

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement
public class Details {
    private String description;
    private String num;
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }
    public String getNum() {
        return num;
    }
    public void setNum(String num) {
        this.num = num;
    }
    public Details(String description,String num) {
        super();
        this.description = description;
        this.num = num;
    }
    public Details() {

    }



}

    public Details() {

    }



}

下面只提供部分代码
        @GET
        @Path("/hello3")
        @Produces(MediaType.APPLICATION_JSON)
        public Book getHello3() {
            Book book = new Book();
            book.setName("哈利波特");
            book.setPrice("35.65$");
            Details details=new Details("这是崭新的一本书!!!","156本");
            book.setDetails(details);
            return book;
        }

返回结果