[JAVA]用Java实现的各种排序

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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; Ye|(5f
} cTBUj
int i1=l; f>iDqC4
int i2=mid+1; f hjlt#
for(int cur=l;cur<=r;cur++){ BJgHel+N
if(i1==mid+1) 0|DyYu
data[cur]=temp[i2++]; Y?6}r;<
else if(i2>r) rI OKCL?
data[cur]=temp[i1++]; tM|/OJ7
else if(temp[i1] data[cur]=temp[i1++]; q2P_37
else NY6;\ 7!n
data[cur]=temp[i2++]; JM7FVB
} :*ZijN*{)$
} PLJDRp 2o
;\(LovUy6
} H;seT XL
=$y;0]7Lwi
改进后的归并排序: i#aKW'
^#t6/fY.#
package org.rut.util.algorithm.support; KF6N P
~3Za"q*0s
import org.rut.util.algorithm.SortUtil; o!lKP>
-,Js2+QZ#
/** ;H3~r^>c
* @author treeroot <G0Ut6J>
* @since 2006-2-2 ;9Qxq]
* @version 1.0 -zUBK
*/ azzG
public class ImprovedMergeSort implements SortUtil.Sort { oE_*hp+
2tg07
private static final int THRESHOLD = 10; aCJ-T8?'
RG=i74a
/* IR{XL\WF
* (non-Javadoc) JAM]neKiX
* 9I:3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o@hj.)u
*/ LM(r3sonb
public void sort(int[] data) { +4p=a [
int[] temp=new int[data.length]; @} +k]c25
mergeSort(data,temp,0,data.length-1); Rt7l`|g a+
} ]4r&Q4d>O
)W6l/
private void mergeSort(int[] data, int[] temp, int l, int r) { 0Y'ow=8M
int i, j, k; F-F1^$]k
int mid = (l + r) / 2; ;Ea8>
if (l == r) }]M'f:%b
return; 'BUfdb8d
if ((mid - l) >= THRESHOLD) W56VA>ia
mergeSort(data, temp, l, mid); i&p6UU
else YS@TQ?
insertSort(data, l, mid - l + 1); K%_UNivN
if ((r - mid) > THRESHOLD) E#3tkFF0Z[
mergeSort(data, temp, mid + 1, r); '(SivD
else ,c0t#KgQ.
insertSort(data, mid + 1, r - mid); `Z#':0Z
ei>iXDt
for (i = l; i <= mid; i++) { EM@EB<pRX
temp = data; (.iwD&
} itE/QB
for (j = 1; j <= r - mid; j++) { $=ESY>MO
temp[r - j + 1] = data[j + mid]; 7z$bCO L=S
} Q"uK6ANp'
int a = temp[l]; .S1MxZhbP
int b = temp[r]; 7KGb2V<t
for (i = l, j = r, k = l; k <= r; k++) { EiaP1o
if (a < b) { ;y{(#X#
data[k] = temp[i++]; Q^=0p0
a = temp; azNv(|eeJL
} else { a\~118 !
data[k] = temp[j--]; {LVA_7@
b = temp[j]; 4"3.7.<Q`
} DUH DFG
} ^7*7^<
} @y'ZM
pr1bsrMuL
/** c10$5V&@
* @param data @Kn@j D;
* @param l fP6.
* @param i UCkV;//.
*/ :>o0zG[;f
private void insertSort(int[] data, int start, int len) { y"ss<`Cn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )FmIL(vu
} >4-9 @i0FV
} )y Zr]
} ?=^\kXc[
} gHkHAOe/
)v11j.D
堆排序： _<DOA:'v
{]Cn@.TPD
package org.rut.util.algorithm.support; -'L~Y~'.
4eG\>#5
import org.rut.util.algorithm.SortUtil; |W$|og'wC
*9w-eK1{
/** ^ERdf2
* @author treeroot _%Ua8bR$
* @since 2006-2-2 6$f\#TR
* @version 1.0 jN'h/\
*/ Cz$q"U
public class HeapSort implements SortUtil.Sort{ :<k (y?GB
]NI CQ9
/* (non-Javadoc) %W2U$I5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q$ Dx:
*/ lKQevoy'
public void sort(int[] data) { (i1x<
MaxHeap h=new MaxHeap(); JZ*.;}"
h.init(data); #qR6TM&;
for(int i=0;i h.remove(); ~tV7yY|zr
System.arraycopy(h.queue,1,data,0,data.length); HB$?}V
} c0rU&+:Ry
MxT&@pq
private static class MaxHeap{ ?*yB&(a:8
p >ua{}!L
void init(int[] data){ ;m>/tD%
this.queue=new int[data.length+1]; MEJX5qG6m
for(int i=0;i queue[++size]=data; 98O]tL+k/u
fixUp(size); guGX G+
} 9E8&~y
} 2<p@G#(
6&0G'PMf
private int size=0; %n8CK->
QxxPImubB
private int[] queue; Oq,@{V@)9k
frDMFEXXP
public int get() { cQ1Axs TO
return queue[1]; s3yGL
} QRrAyRf[
m&DI2he
public void remove() { XqUQ{^;aI
SortUtil.swap(queue,1,size--); i=]R1yP
fixDown(1); /]j{P4
} _G@Zn[v
file://fixdown Y<(7u`F
private void fixDown(int k) { }!>\Ja<\
int j; $d])>4eQ
while ((j = k << 1) <= size) { 89GW!
if (j < size %26amp;%26amp; queue[j] j++; tc)Md]S
if (queue[k]>queue[j]) file://不用交换 (VI(Nv:o@
break; bc~$"
SortUtil.swap(queue,j,k); <Opw"yY&q]
k = j; /wJ4hHY
} EW vhT]<0
} %e0X-tXcmX
private void fixUp(int k) { f(eXny@Y
while (k > 1) { Vn:v{-i
int j = k >> 1; .d[^&<^
if (queue[j]>queue[k]) K@%T5M4j
break; 8IWT;%
SortUtil.swap(queue,j,k); P]y{3y:XxM
k = j; NIQ}+xpC
} x|Pz24yP9
} E<u(Yw6=
{ pQJ.QI
} Rx"+i0
qLb~^'<iD
} Gf9sexn]l
9I [:#,zdf
SortUtil： cZF|oZ6<
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package org.rut.util.algorithm; J%xUO1
IBeorDIZ
import org.rut.util.algorithm.support.BubbleSort; qNHI$r'
import org.rut.util.algorithm.support.HeapSort; 2dKt}o>
import org.rut.util.algorithm.support.ImprovedMergeSort; MaD|X_g
import org.rut.util.algorithm.support.ImprovedQuickSort; Cg~1<J?2
import org.rut.util.algorithm.support.InsertSort; H Q[
import org.rut.util.algorithm.support.MergeSort; I0Allw[
import org.rut.util.algorithm.support.QuickSort; 7A'E+>1d
import org.rut.util.algorithm.support.SelectionSort; ^'tT_ gT
import org.rut.util.algorithm.support.ShellSort; oMLs22Do?
e1JHN
/** V4}jv7>A
* @author treeroot _=`DzudE
* @since 2006-2-2 pCo3%(
* @version 1.0 P*K"0[\n
*/ 6LCR ;~ ]
public class SortUtil { 5[B)U">]
public final static int INSERT = 1; D*VO;?D
public final static int BUBBLE = 2; )CE]s)6+2
public final static int SELECTION = 3; /=AFle2(
public final static int SHELL = 4; (;05=DsO
public final static int QUICK = 5; L >"O[@
public final static int IMPROVED_QUICK = 6; |@1(^GX
public final static int MERGE = 7; V9Mr&8{S4
public final static int IMPROVED_MERGE = 8; s?S e]?i
public final static int HEAP = 9; Ci4c8
eAI|zk6
public static void sort(int[] data) { 2^Im~p~ByE
sort(data, IMPROVED_QUICK); =?+w5oI0
} 5izpQ'>
private static String[] name={ \h s7>5O^K
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "+qZv(
}; $0P16ZlPC
:8}Qt^p
private static Sort[] impl=new Sort[]{ F 2zUz[
new InsertSort(), *\}$,/m['
new BubbleSort(), }aa]1X(u
new SelectionSort(), vRW;{,d
new ShellSort(), <Z_\2 YWA
new QuickSort(), h:C:opa-=
new ImprovedQuickSort(), aQY.96yo
new MergeSort(), }W!w
new ImprovedMergeSort(), BdU .;_K
new HeapSort() Kx,X{$Pe
}; 0LzS #J+
WL'!M&h
public static String toString(int algorithm){ @cxM#N8e
return name[algorithm-1]; hSAI G
} F g):>];<9
('j'>"1H
public static void sort(int[] data, int algorithm) { lWJYT<kt
impl[algorithm-1].sort(data); | a i#rU
} 4, Vx3QFZ
"d~<{(:N^
public static interface Sort { 7.2!g}E
public void sort(int[] data); a Iyzt
} =u0a/2u|
Mg8ciV}\xY
public static void swap(int[] data, int i, int j) { K%t&aRjS
int temp = data; N.E{6_{S
data = data[j]; 4$N,|bt
data[j] = temp; =x(k)RTDu
} pBBKfv
} _(io8zqe{j