[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; ?34EJ !
} vy2*BTU?
int i1=l; Zh@4_Z9n!
int i2=mid+1; EyKkjEXx_
for(int cur=l;cur<=r;cur++){ 6ywnyh
if(i1==mid+1) onWYT}c{
data[cur]=temp[i2++]; ^5FJ}MMJf
else if(i2>r) ,Do$`yO+
data[cur]=temp[i1++]; 0~@L%~
else if(temp[i1] data[cur]=temp[i1++]; \ pe[V~F
else Tv*1q.MB
data[cur]=temp[i2++]; &2P:A
} BM=V,BZy
} P0`>{!r6@
+7lRP)1R
} Xj})?{FP
k vue@
改进后的归并排序: 3H\b N4
/q*Qx )y+1
package org.rut.util.algorithm.support; K&\BwBU
^cPo{xf
import org.rut.util.algorithm.SortUtil; [#,X$O>
r+V(1<`2X
/** ?}1JL6mF{
* @author treeroot l7D4`i<F
* @since 2006-2-2 j"D0nG,
* @version 1.0 Mi%1+
*/ "S{6LWkD
public class ImprovedMergeSort implements SortUtil.Sort { NejsI un%
k #,Gfs
private static final int THRESHOLD = 10; w ufKb.4`
i$fjr[$B
/* 1S)0 23N
* (non-Javadoc) lo>-}xd
* 9m#H24{V'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9+N._u
*/ &ESR1$)'P
public void sort(int[] data) { @LkW_
int[] temp=new int[data.length]; ![X.%
mergeSort(data,temp,0,data.length-1); *+,Lc1|\
} SCI-jf3WN
S7#^u`'Q_^
private void mergeSort(int[] data, int[] temp, int l, int r) { LfjS[
int i, j, k; KH@) +Rj
int mid = (l + r) / 2; UtGd/\:
if (l == r) n/-p;#R
return; 2Xj-A\Oh~
if ((mid - l) >= THRESHOLD) :+gCO!9Y
mergeSort(data, temp, l, mid); q*<J$PI
else MSYLkQ}_b
insertSort(data, l, mid - l + 1); eqUn8<<s
if ((r - mid) > THRESHOLD) 0-&sJ
mergeSort(data, temp, mid + 1, r); 5Ky9Pz
else e G*s1uQl
insertSort(data, mid + 1, r - mid); EDa08+Y
]Xkc0E1
for (i = l; i <= mid; i++) { (Aov}I+
temp = data; ;t@ 3Go
} Vp{RX8?.
for (j = 1; j <= r - mid; j++) { {7M4SC@p|
temp[r - j + 1] = data[j + mid]; )*$
} :;hBq4h
int a = temp[l]; 8HH.P`Vk#
int b = temp[r]; ]B[/sqf
for (i = l, j = r, k = l; k <= r; k++) { Q'Jpsmwu
if (a < b) { %f3Nml
data[k] = temp[i++]; tWX+\ |
a = temp; 2AdHj&XE
} else { )l!&i?h%
data[k] = temp[j--]; IpaJ<~ p
b = temp[j]; !i"9f_
} 9OJ\n|,(
} y 4,T
} s$nfY.C
pg}DC0a
/** yQA"T?
* @param data enD C#
* @param l DRBYH(
* @param i k}Clq;G
*/ vsr~[d=
private void insertSort(int[] data, int start, int len) { aY1#K6(y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I+4qu|0lA
} *i]Z=
} E/ed0'|m
} XGrxzO|{
} Rp@}9qijb
k f K"i
堆排序： )>A%FL9
0 *Yivx6
package org.rut.util.algorithm.support; C6T 9
Nm:|C 3_I
import org.rut.util.algorithm.SortUtil; kp &XX|
?k7/`gU
/** 1 FIiX
* @author treeroot =ILo`Q~
* @since 2006-2-2 <812V8<!
* @version 1.0 T?}=k{C]
*/ =L; n8~{@y
public class HeapSort implements SortUtil.Sort{ A`8}J4
~zOU/8n ,F
/* (non-Javadoc) V:"\(Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) va*>q-QCr
*/ ea[a)Z7#
public void sort(int[] data) { xyJgHbml
MaxHeap h=new MaxHeap(); ()IgSj?,
h.init(data); #(Yb lY
for(int i=0;i h.remove(); qP.VK?jF|
System.arraycopy(h.queue,1,data,0,data.length); zm^p7&ak$
} N@`9 ~JS
FVLA^$5c
private static class MaxHeap{ x?k |i}Q
nh.v?|
void init(int[] data){ c$Nl-?W
this.queue=new int[data.length+1]; 8w@jUGsc
for(int i=0;i queue[++size]=data; l=OC?d*m
fixUp(size); >a] s
} H-y-7PW*~
} oO9iB:w
|c+N)FB
private int size=0; [(^''*7r+T
$/(/v?3][e
private int[] queue; E6IL,Iq9
WAXrA$:3J
public int get() { 21J82M
return queue[1]; !m.')\4<
} 2!& ;ZcT,
K0!#l Br
public void remove() { C&K(({5O
SortUtil.swap(queue,1,size--); E]Gq!fA&<
fixDown(1); ;0}"2aGY
} XXdMppoR
file://fixdown 9*Mg<P"
private void fixDown(int k) { eMMiSO!3
int j; -8J@r2\
while ((j = k << 1) <= size) { mp$II?hZ*
if (j < size %26amp;%26amp; queue[j] j++; Rn^N+3o'M
if (queue[k]>queue[j]) file://不用交换 MhB=+S[@
break; ?=o]Wx0(9
SortUtil.swap(queue,j,k); ;."{0gq
k = j; ,3TD $2};.
} kR|DzB7
} 2F)OyE
private void fixUp(int k) { ;iI2K/ 3
while (k > 1) { /|^^v DL
int j = k >> 1; Jx[e{o)o
if (queue[j]>queue[k]) )uJ`E8>-
break; WQ`P^5e
SortUtil.swap(queue,j,k); Z"&ODVP
k = j; x-k/rZ
} <5L`d}
} @)B5^[4(;
^rb7`s#G
} R_&V.\e_
d~s-;T
} \evgDZf
;Cpm3at
SortUtil： <^$b1<@
WED7]2>
package org.rut.util.algorithm; gM]/Y6*$b
\FX3=WW
import org.rut.util.algorithm.support.BubbleSort; xg!\C@$
import org.rut.util.algorithm.support.HeapSort; ]o[HH_`s@
import org.rut.util.algorithm.support.ImprovedMergeSort; Wl"fh_
import org.rut.util.algorithm.support.ImprovedQuickSort; ag4^y&
import org.rut.util.algorithm.support.InsertSort; 6m<9^NT
import org.rut.util.algorithm.support.MergeSort; zT40,rk
import org.rut.util.algorithm.support.QuickSort; q:eAL'OkM
import org.rut.util.algorithm.support.SelectionSort; JugQ +0
import org.rut.util.algorithm.support.ShellSort; F#9KMu<<cI
l@9:VhU(
/** s0'U[]
* @author treeroot wY)GX
* @since 2006-2-2 nr6[rq
* @version 1.0 -2XIF}.Hu
*/ +n]Knfi
public class SortUtil { u9%:2$[
public final static int INSERT = 1; E 4(muhY
public final static int BUBBLE = 2; {_D'\i(Y_
public final static int SELECTION = 3; BbhdGFG1
public final static int SHELL = 4; 6iS+3+
public final static int QUICK = 5; V#FLxITk
public final static int IMPROVED_QUICK = 6; Z.19v>-c
public final static int MERGE = 7; SaScP
public final static int IMPROVED_MERGE = 8; rV{e[fGd
public final static int HEAP = 9; N1+]3kt ~
N1t:i? q&
public static void sort(int[] data) { je0 ?iovY
sort(data, IMPROVED_QUICK); Tdp$laPO'
} Q 7?4GxMj
private static String[] name={ 0;`PHNBq
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W#/Ol59
}; +1A<kJ
.h }D%Qa
private static Sort[] impl=new Sort[]{ ZuON@(
new InsertSort(), QpZhxp
new BubbleSort(), /FXfu
new SelectionSort(), 3@A k6Uh
new ShellSort(), ucO]&'hu:
new QuickSort(), @J)vuGS
new ImprovedQuickSort(), &0blHDMj{#
new MergeSort(), (6aZQ`H
new ImprovedMergeSort(), :"^$7
new HeapSort() HuClO
}; |1x,_uyQ%
@TT[H*,
public static String toString(int algorithm){ jV8><5C
return name[algorithm-1]; 11'Tt!
} 6<GWDO
a_x6 v*
public static void sort(int[] data, int algorithm) { O`| ri5d
impl[algorithm-1].sort(data); s!\L1E
} M>#S z
Sy~Mh]{E
public static interface Sort { IT"jtV
public void sort(int[] data); EZFWxR/
} \/GY0s
ld6@&34
public static void swap(int[] data, int i, int j) { W6>uLMUa
int temp = data; l\GNd6)H
data = data[j]; /otgFQ_
data[j] = temp; D[?|\?
} Uh}yHD`K
} W>49,A,q