[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; jj2iF/
} b},2A'X
int i1=l; -!1=S: S
int i2=mid+1; <.n,:ir
for(int cur=l;cur<=r;cur++){ D:U6r^c
if(i1==mid+1) rC^5Z
data[cur]=temp[i2++]; :kR>wX
else if(i2>r) 7 mCf*|
data[cur]=temp[i1++]; 5:IDl1f5
else if(temp[i1] data[cur]=temp[i1++]; -eF-r=FR
else {kk%_q
data[cur]=temp[i2++]; //2O#Fg{/
} ?pW1}:z
} uS`}
O>]i?
} BJux5Nh
r{R<J?Y
改进后的归并排序: );d07\V
j9>[^t3U
package org.rut.util.algorithm.support; Unb2D4&'
KSchgon0V
import org.rut.util.algorithm.SortUtil; <!Cjq,Sk7
h$'6."I
/** 6U*CR=4
* @author treeroot l!x+K&
* @since 2006-2-2 zX_F+"]THt
* @version 1.0 O3o^%0
*/ Xs052c|s
public class ImprovedMergeSort implements SortUtil.Sort { K`Kv.4
.8|wc
private static final int THRESHOLD = 10; 6 H P66B
6v3l^~kc'
/* @@oJ@;
* (non-Javadoc) GB|>eZLv<
* /&Oo)OB;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L8h3kT
*/ 2@ZVEN
public void sort(int[] data) { Nz2VaZ
int[] temp=new int[data.length]; 47Z3nl?
mergeSort(data,temp,0,data.length-1); n>,:*5"G
} 'M~`IN`
$\NqD:fgb
private void mergeSort(int[] data, int[] temp, int l, int r) { e' l9
int i, j, k; 7(+4^
int mid = (l + r) / 2; yk8b>.Y\A
if (l == r) Ljm`KE\Q;t
return; + kKanm[!v
if ((mid - l) >= THRESHOLD) n\((#<&
mergeSort(data, temp, l, mid); v@%4i~N
else ~x,_A>a
insertSort(data, l, mid - l + 1); ]%A> swCpn
if ((r - mid) > THRESHOLD) dBd7#V:}yV
mergeSort(data, temp, mid + 1, r); {OEjITm
else RlL]p`g
insertSort(data, mid + 1, r - mid); l'(FM^8jv
[y9a.*]u/@
for (i = l; i <= mid; i++) { .gg0rTf=-
temp = data; 6U !P8q
} vd lss|
for (j = 1; j <= r - mid; j++) { DSwb8q
temp[r - j + 1] = data[j + mid]; X=whZ\EZ
} AE77i,Xa
int a = temp[l]; _l7_!Il_
int b = temp[r]; `Jc/ o=]
for (i = l, j = r, k = l; k <= r; k++) { ?2&= +QaT
if (a < b) { lZ-U/$od
data[k] = temp[i++]; S3Y.+. 0U
a = temp; GmR3 a
} else { e El)wZ,A
data[k] = temp[j--]; jvB[bS`<H
b = temp[j]; U)8yd,qG[%
} .m]}Ba}J$
} pZ>yBY?R8>
} [o<hQ`&
v>wN O
/** q|<B9Jk
* @param data _!o8s%9be
* @param l $!*>5".A
* @param i /3aW 0/^o
*/ @KL&vm(F$
private void insertSort(int[] data, int start, int len) { F^gTID
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BjfVNF;hk:
} I/njyV)H
} $97O7j@
} /8e}c`
} cRf F!EV
X~jdOaq{F:
堆排序： c`xNTr01
F~6]II
package org.rut.util.algorithm.support; ,5$G0
Fy{yg]O"
import org.rut.util.algorithm.SortUtil; rByth,|
vIJ5iLF
/** JhFn"(O
* @author treeroot -Rw3[4>@O"
* @since 2006-2-2 YAc:QVT87
* @version 1.0 <ZSXOh,'
*/ `w 6Qsah
public class HeapSort implements SortUtil.Sort{ P#hRqETw
h]s6)tII
/* (non-Javadoc) XA!a^@<H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3l?|+sU>O
*/ AT1cN1:4?
public void sort(int[] data) { ndLEIqOY
MaxHeap h=new MaxHeap(); ,RR{Y-
h.init(data); N] sbI)Z@
for(int i=0;i h.remove(); &AJ bx
System.arraycopy(h.queue,1,data,0,data.length); Y|LL]@Lv
} k";dK*hD,
C!^A\T7p
private static class MaxHeap{ MOQ6&C`7q
P6GTgQ<'BA
void init(int[] data){ ooJxE\L
this.queue=new int[data.length+1]; M^'1Q.K
for(int i=0;i queue[++size]=data; .9vS4C
fixUp(size); F&6#j
} .5Y{Yme
} z]N#.utQ
U*a#{C7"
private int size=0; ?IAu,s*u
|V\{U j
private int[] queue; Jai]z
F[}#7}xjA
public int get() { `$f`55e
return queue[1]; "]=OR>
} @!")shc
4JK6<Pk
public void remove() { nCi ]6;Y
SortUtil.swap(queue,1,size--); W5Z-s.o
fixDown(1); :<P4=P P
} GPHb-
file://fixdown fsjLD|?|:
private void fixDown(int k) { i[KXkjr
int j; Fl.?*KBz
while ((j = k << 1) <= size) { V| Fo@
if (j < size %26amp;%26amp; queue[j] j++; @]n8*n
if (queue[k]>queue[j]) file://不用交换 q.=Q
break; H7+z"^s*
SortUtil.swap(queue,j,k); "~ID.G|<
k = j; SOR\oZ7
} /}@F q
} zY\u" '4
private void fixUp(int k) { PFp!T [)
while (k > 1) { bWA_a]G
int j = k >> 1; T@ESMPeU:X
if (queue[j]>queue[k]) %EU_OS(u.{
break; AVjRhe
SortUtil.swap(queue,j,k); 9R$$(zB 1;
k = j; W\Pd:t
} IB# ua:
} "m^gCN}c
qe&|6M!
} ynA_Z^j
75;RAKGi
} Xd:{.AXW
qWW\d', .
SortUtil： liYsUmjZ=
(DvPdOT+3
package org.rut.util.algorithm; WILa8"M
f.J^HQ_
import org.rut.util.algorithm.support.BubbleSort; |I1,9ex
import org.rut.util.algorithm.support.HeapSort; kKF=%J?X
import org.rut.util.algorithm.support.ImprovedMergeSort; /b #w.>e
import org.rut.util.algorithm.support.ImprovedQuickSort; kI`HD
import org.rut.util.algorithm.support.InsertSort; I7Kgi3
import org.rut.util.algorithm.support.MergeSort; 0z \KI?kd
import org.rut.util.algorithm.support.QuickSort; )*}\fmOv{
import org.rut.util.algorithm.support.SelectionSort; 0Lj;t/mG
import org.rut.util.algorithm.support.ShellSort; !PoyM[Z"f
@VP/kut
/** di_UJ~
* @author treeroot fZf>>mu@r'
* @since 2006-2-2 H%m^8yW1
* @version 1.0 X$==J St
*/ {P?Ge
public class SortUtil { VJ-t#q"
public final static int INSERT = 1; Po=:-Of:
public final static int BUBBLE = 2; ,9G'1%z,
public final static int SELECTION = 3; xytWE:=
public final static int SHELL = 4; H9jlp.F
public final static int QUICK = 5; i +@avoW
public final static int IMPROVED_QUICK = 6; >AV9 K
public final static int MERGE = 7; by9UwM=gp
public final static int IMPROVED_MERGE = 8; g.Ur~5r
public final static int HEAP = 9; G0:<#?<5
w@2NXcmw
public static void sort(int[] data) { w +UBXW
sort(data, IMPROVED_QUICK); DA=LR
} W\B@0Iso
private static String[] name={ DOtz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H$?MPA-c
}; %62|dhl6
([$KXfAi]h
private static Sort[] impl=new Sort[]{ )xc1Lsrr9
new InsertSort(), axnVAh|}S
new BubbleSort(), 9u=]D> kb
new SelectionSort(), JT}"CuC
new ShellSort(), x!I@cP#O
new QuickSort(), ){/n7*#Th%
new ImprovedQuickSort(), t_I-6`8o]
new MergeSort(), ^'N!k{x
new ImprovedMergeSort(), |7|'JTy
new HeapSort() rk=w~IZJ3
}; OkQ< Sc
?_{{iil
public static String toString(int algorithm){ _@\-`>J
return name[algorithm-1]; 9r\p4_V
} Se??E+aX
85"Szc-#
public static void sort(int[] data, int algorithm) { |C./gdq
impl[algorithm-1].sort(data); 7h/Mkim$5
} d>J +7ex+
umPN=0u6
public static interface Sort { nUq@`G
public void sort(int[] data); 1h(n}u
} ;(E]mbV'=
De$Ic"Z9L
public static void swap(int[] data, int i, int j) { MIr[_
int temp = data; Xl$r720ZJr
data = data[j]; E\4ZUGy0
data[j] = temp; uuHs)
} *W |
} Q.4+"JoG