[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; VlXUrJ9&
} ds,NNN<HW
int i1=l; VChNDHiH
int i2=mid+1; /\hybx'
for(int cur=l;cur<=r;cur++){ Ro`9Ibqr
if(i1==mid+1) o nt8q8
data[cur]=temp[i2++]; /\V-1 7-
else if(i2>r) u;GS[E4
data[cur]=temp[i1++]; x4Mq{MrWp
else if(temp[i1] data[cur]=temp[i1++]; +1~Y2
else *Fb]lM7D
data[cur]=temp[i2++]; Ds? @LE|
} Jw)Uk< \
} Tz[ck'k
]*|+06
} I{U7BZy
_8Cw_
改进后的归并排序: )-%3;e<w
nj$TdwZbK
package org.rut.util.algorithm.support; U1}-]^\
mZQW>A]iE
import org.rut.util.algorithm.SortUtil; 7v3'JG1r-
>7i&(6L
/** SEa'>UG
* @author treeroot Ybo:2e
* @since 2006-2-2 Z:9xf:g*
* @version 1.0 >zFk}/
*/ u0 myB/`
public class ImprovedMergeSort implements SortUtil.Sort { .\XFhOsa
/.P9n9
private static final int THRESHOLD = 10; U{/d dCf7
vqO d`_)
/* @lpo$lN0R
* (non-Javadoc) '/8{Mx+
* C+o1.#]JM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0z&]imU
*/ hOZ:r =%
public void sort(int[] data) { }z%fQbw
int[] temp=new int[data.length]; *-uA\
mergeSort(data,temp,0,data.length-1); UMtnb:ek
} :%G_<VAo!
{txW>rZX
private void mergeSort(int[] data, int[] temp, int l, int r) { 9o%k [n
int i, j, k; y5/frJ
int mid = (l + r) / 2; slUnB6@Q
if (l == r) 5j'7V1:2
return; ZHu"&&
if ((mid - l) >= THRESHOLD) 4eVQO%&2
mergeSort(data, temp, l, mid); 3yGo{uW
else &/dYJv$[9
insertSort(data, l, mid - l + 1); U{1%ldOJ%
if ((r - mid) > THRESHOLD) Me;XG?`
mergeSort(data, temp, mid + 1, r); Q1kZ+b&
else 9w3KAca
insertSort(data, mid + 1, r - mid); |D*a"*1+A
-gn!8G1
for (i = l; i <= mid; i++) { |L9p.q
temp = data; \ -n&z;`
} ]{Y7mpdB
for (j = 1; j <= r - mid; j++) { :m]KVcF.
temp[r - j + 1] = data[j + mid]; oYx4+xH/
} /1@py~ZX
int a = temp[l]; i.Rxx, *?
int b = temp[r]; +{~cX]|
for (i = l, j = r, k = l; k <= r; k++) { *@;bWUJ
if (a < b) { _tlr8vL
data[k] = temp[i++]; hTc :'vq
a = temp; Xsk/U++
} else { q$7w?(Lk
data[k] = temp[j--]; xe"A;6H
b = temp[j]; &s#OiF8
} P*|qbY
} }|UTwjquBD
} rS>@>8k2,
&?@gCVNO,
/** /9b+I/xY"
* @param data C>A} e6o
* @param l x)R1aq
* @param i B#]:1:Qn
*/ 0VnRtLnqI
private void insertSort(int[] data, int start, int len) { t/lQSUip
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \E {'|
} lLur.f
} `#*`hH8
} }wB!Bx2
} &E]<KbVx
s .@Szq
堆排序： _RNP_$a
ZU$QwI8
package org.rut.util.algorithm.support; FM=XoMP q
E]Qd5l
import org.rut.util.algorithm.SortUtil; 9=J 3T66U
:*M2@
/** W K(GR\@
* @author treeroot y*Gq VA[
* @since 2006-2-2 s"`Oj5
* @version 1.0 \WqC^Di
*/ z57q|
public class HeapSort implements SortUtil.Sort{ DaBy<pGb?
e= XC$Jv
/* (non-Javadoc) 8Ow#W5_3|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y1h3Ch>Y
*/ 2K^xN]]rG
public void sort(int[] data) { 4Wu(Tps
MaxHeap h=new MaxHeap(); KBoW(OP4'
h.init(data); \=[38?QOY
for(int i=0;i h.remove(); de9e7.(2
System.arraycopy(h.queue,1,data,0,data.length); .E9$j<SP-
} tb>Q#QB&u
9e7):ZupO
private static class MaxHeap{ pxI[/vS N
NxzAlu
void init(int[] data){ RT2&^9-
this.queue=new int[data.length+1]; cJ>^@pd{
for(int i=0;i queue[++size]=data; j*FpQiBoT
fixUp(size); rM4Ri}bS
} v+i==vxg
} ]M 2n%9
)afH:
private int size=0; *&5./WEOH
uF{l`|b'
private int[] queue; mqBX1D`e2
a *bc#!e
public int get() { BwYR"
return queue[1]; {qm5H7sL
} Bnz}:te}
uG/bCb+V
public void remove() { ?'>[nm
SortUtil.swap(queue,1,size--); ,!^g8zO
fixDown(1); .B!L+M< [
} PKev)M;C+
file://fixdown %+dRjG~TB
private void fixDown(int k) { =T$2Qo8
int j; rm<`H(cT
while ((j = k << 1) <= size) { )LL.fPic
if (j < size %26amp;%26amp; queue[j] j++; 2{G7ignv
if (queue[k]>queue[j]) file://不用交换 q#0yu"<
break; G&yF9s)Lvs
SortUtil.swap(queue,j,k); BO 3z$c1yU
k = j; ZV!*ZpTe~
} (OG>=h8?
} i;J*9B_U
private void fixUp(int k) { `J}FSUn\
while (k > 1) { [5]* Be
int j = k >> 1; ^.[+)0I
if (queue[j]>queue[k]) WWA!_
break; 1!R:}r3t
SortUtil.swap(queue,j,k); .Zx7+`i
k = j; fM<g++X
} } d7o-
} U6M&7l8
Bn Nu/02.=
} mTa^At"
)1&,khd/u
} "'c =(P
}& 01=nY
SortUtil： ,oj)`?Vh
1gH>B5`
package org.rut.util.algorithm; +B OuU#
lW@i,1
import org.rut.util.algorithm.support.BubbleSort; \'x?VVw
import org.rut.util.algorithm.support.HeapSort; i^/D_L.
import org.rut.util.algorithm.support.ImprovedMergeSort; q%FXox~b
import org.rut.util.algorithm.support.ImprovedQuickSort; G]I^zd&P
import org.rut.util.algorithm.support.InsertSort; pB79#4
import org.rut.util.algorithm.support.MergeSort; YfH+kDT
import org.rut.util.algorithm.support.QuickSort; -KCQ!0\F
import org.rut.util.algorithm.support.SelectionSort; E2|c;{c
import org.rut.util.algorithm.support.ShellSort; EJO6k1
o(5 (]bJ
/** S]DYEL$
* @author treeroot =A^VzIj(
* @since 2006-2-2 $@L}/MO
* @version 1.0 dRLvej,
*/ @RS|}M^4
public class SortUtil { +tFl
public final static int INSERT = 1; &M+fb4:_
public final static int BUBBLE = 2; ,m.IhnCV\
public final static int SELECTION = 3; T8J[B( )L
public final static int SHELL = 4; J+8T Ie
public final static int QUICK = 5; qXQ7Jg9
public final static int IMPROVED_QUICK = 6; 9@z"~H
public final static int MERGE = 7; U*Pi%J
public final static int IMPROVED_MERGE = 8; #3Jn_Y%P.
public final static int HEAP = 9; MQGR-WV=5
54, (;
public static void sort(int[] data) { (cqVCys
sort(data, IMPROVED_QUICK); {KalVZX2R
} )3~):+
private static String[] name={ p'IF2e&z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fRd^@@,[
}; OO+QH 2j
@I|gA
private static Sort[] impl=new Sort[]{ qU,u(El
new InsertSort(), #Y9~ Xp^.
new BubbleSort(), {QTnVS't 0
new SelectionSort(), V3$Yr"rZ;
new ShellSort(), `>cBR,)r
new QuickSort(), Ox1#}7`0>
new ImprovedQuickSort(), [Dq!t1
new MergeSort(), m`Ver:{
new ImprovedMergeSort(), ULkhTB
new HeapSort() 7B,axkr
}; pT`oC&
+1%7*2q,
public static String toString(int algorithm){ G\1\L*+0
return name[algorithm-1]; %Cz&7qf"
} qx~-(|s`H
&z(E-w/S
public static void sort(int[] data, int algorithm) { -r5JP[0kP
impl[algorithm-1].sort(data); 5J4'\M
} 9I;d>%
CQx#Xp>=s
public static interface Sort { ub/9T-#l
public void sort(int[] data); C.[abpc
} :_FnQhzg
MIJ^n(-G
public static void swap(int[] data, int i, int j) { O+^l>+ZGj?
int temp = data; "ebm3t@C
data = data[j]; hY@rt,! 8
data[j] = temp; 9=J+5V^qD<
} |99/?T-QW
} S_VZ^1X]