[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; ^.pE`l%1}
} [ZL r:2+z
int i1=l; ;o~+2Fir
int i2=mid+1; ~frPV8^DP
for(int cur=l;cur<=r;cur++){ 23B^g
if(i1==mid+1) @p9e:[
data[cur]=temp[i2++]; +X2 i/}
else if(i2>r) k1QpX@
data[cur]=temp[i1++]; ];d5X
else if(temp[i1] data[cur]=temp[i1++]; i_oro"%yL
else wiK@o$S-
data[cur]=temp[i2++]; lOowMlf@2
} W TXD4}
} w@gl
`? 9]'
} f)u*Q!BDD
%x cM_|AyR
改进后的归并排序: <3],C)Zwc
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package org.rut.util.algorithm.support; )7Hon
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import org.rut.util.algorithm.SortUtil; hJ$C%1;
jm#F*F vL
/** Q G=-LXv:@
* @author treeroot MA/"UV&M(
* @since 2006-2-2 VOowA^
* @version 1.0 4 _c:Vl
*/ Se;?j-
public class ImprovedMergeSort implements SortUtil.Sort { e"v[)b++Y
Rsa\V6N>
private static final int THRESHOLD = 10; *_"c!eW
ulz\x2[Pf
/* clR?< LO
* (non-Javadoc) Y*5@|Q
* &2<&X( )
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {"gyXDE1
*/ Xn ZX *Y]"
public void sort(int[] data) { @^XkU(m
int[] temp=new int[data.length]; R&x7Iq:=D
mergeSort(data,temp,0,data.length-1); ]P}K3tN%]
} 4}r\E,`*X
|)!k@?_
private void mergeSort(int[] data, int[] temp, int l, int r) { alb+R$s
int i, j, k; Yt O@n@1
int mid = (l + r) / 2; u75)>^:I
if (l == r) <L!~f`nH2
return; U4^p({\|-
if ((mid - l) >= THRESHOLD) ]U^d1&k
mergeSort(data, temp, l, mid); >2/wzsW
else QBPvGnb
insertSort(data, l, mid - l + 1); ^ T:qT*v
if ((r - mid) > THRESHOLD) %x'bo>h@
mergeSort(data, temp, mid + 1, r); ;I`,ZKY
else |Ad6~E+aL-
insertSort(data, mid + 1, r - mid); ]\os`At
:>er^\
for (i = l; i <= mid; i++) { \0^rJ1*
temp = data; X,JWLS J
} 0,L$x*Nj5
for (j = 1; j <= r - mid; j++) { H[_uVv;}6
temp[r - j + 1] = data[j + mid]; K#6`LL m
} iEJQ#5))0
int a = temp[l]; Ei?9M^w
int b = temp[r]; :)+@qxTy
for (i = l, j = r, k = l; k <= r; k++) { } {gWTp
if (a < b) { oZ*=7u
data[k] = temp[i++]; _?(hWC"0
a = temp; }Nd`;d
} else { >m_p\$_
data[k] = temp[j--]; ;SlS!6.W-
b = temp[j]; S'%cf7Z
} 8H%I|fm
} g_Dt} !A\B
} Z9 q{r s
HA3SQ
/** @L>NN>?SGQ
* @param data -Y jv&5
* @param l 0@mX4.!
* @param i 8)q]^
*/ yZ(Nv $[5
private void insertSort(int[] data, int start, int len) { +N(YR3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); i6g[E4nk
} 1A/c/iC
} ncw?;
} c^[1]'y
} .5[LQR
!MF"e|W
堆排序： [;V1y`/K1
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package org.rut.util.algorithm.support; [nPzhXs
h7W%}6Cqkw
import org.rut.util.algorithm.SortUtil; f'i8Mm4IL
]stLC; nI
/** g`5`KU|
* @author treeroot W|-N>,G
* @since 2006-2-2 l]klV+9t
* @version 1.0 Bg+]_:<U
*/ s=%+o&B
public class HeapSort implements SortUtil.Sort{ J:-TINeB
C+#;L+$Gi
/* (non-Javadoc) 3W0E6H"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1~xn[acy
*/ 3RH#e1Y
public void sort(int[] data) { neY=:9
MaxHeap h=new MaxHeap(); zs]/Y2
h.init(data); LG@c)H74
for(int i=0;i h.remove(); }A'<?d8
System.arraycopy(h.queue,1,data,0,data.length); Hb AMoow!
} MCrO]N($b
5vh"PlK`s
private static class MaxHeap{ xMfv&q=k@
b=QGbFf
void init(int[] data){ 6`5 @E\"E
this.queue=new int[data.length+1]; #ZnX6=;X
for(int i=0;i queue[++size]=data; `Py= ?[cD
fixUp(size); 3_eml\CY
} /&!d
} ZEyGqCf3
R#Nd|f<
private int size=0; oQjB&0k4
gc8PA_bFz
private int[] queue; 1q233QSW)
~G^}2#5
public int get() { 53+rpU_
return queue[1]; d_7Xlp@
} VU0tyj$
J)yy}[Fx
public void remove() { lbuW*)
SortUtil.swap(queue,1,size--); Lvj5<4h;
fixDown(1); m<'xlF
} Md?bAMnG+}
file://fixdown .8PO7#
private void fixDown(int k) { 't%%hw-m}
int j; %d#)({N
while ((j = k << 1) <= size) { $J0~2TV<
if (j < size %26amp;%26amp; queue[j] j++; B[_bJ *
if (queue[k]>queue[j]) file://不用交换 >0+|0ba
break; c+i`Zd.m<
SortUtil.swap(queue,j,k); cxJK>%84
k = j; .s*EV!SE
} ?kFCYZK|"
} K,,@',
private void fixUp(int k) { Q|H cg|
while (k > 1) { /,@v"mE7c!
int j = k >> 1; &MQt2aL
if (queue[j]>queue[k]) MbFe1U]B
break; 6'*Uo:]
SortUtil.swap(queue,j,k); |>}0? '/]
k = j; WKJL< D ]:
} }nY^T&?`
} KJJb^6P48W
`rdfROKv
} WAmoKZw2
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} #bZ=R
w~KBk)!*
SortUtil： pBnf^Ew1
-GWzMBS S
package org.rut.util.algorithm; pfQZ|*>lkb
x)wt.T?eL
import org.rut.util.algorithm.support.BubbleSort; ~)8i5p;P/k
import org.rut.util.algorithm.support.HeapSort; |Ge/|;.v`
import org.rut.util.algorithm.support.ImprovedMergeSort; 3a)Q:#okD
import org.rut.util.algorithm.support.ImprovedQuickSort; v4##(~Tu
import org.rut.util.algorithm.support.InsertSort; n_&)VF#n(
import org.rut.util.algorithm.support.MergeSort; %s :
import org.rut.util.algorithm.support.QuickSort; H_=[~mJ
import org.rut.util.algorithm.support.SelectionSort; NEou2y+}
import org.rut.util.algorithm.support.ShellSort; W#_gvW
vMdhNOU
/** V>uW|6
* @author treeroot fX$4TPy(h
* @since 2006-2-2 -qP[$Q
* @version 1.0 fQ_8{=<-&X
*/ WCl;#=
public class SortUtil { X6*y/KGN
public final static int INSERT = 1; &r5%WRzpYT
public final static int BUBBLE = 2; +siNU#!
public final static int SELECTION = 3; 8Y~T$Yj^
public final static int SHELL = 4; >upUY(3&
public final static int QUICK = 5; RkP|_Bf8)
public final static int IMPROVED_QUICK = 6; mFoK76
public final static int MERGE = 7; DSZhl-uGM
public final static int IMPROVED_MERGE = 8; AbI*/|sY
public final static int HEAP = 9; 4x?u5L 9o
9.#R?YP$
public static void sort(int[] data) { L\b_,'I
sort(data, IMPROVED_QUICK); A'-YwbY
} C{,] 1X6g
private static String[] name={ zYF&Dv/u/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )0d".Q|v4
}; bK;aV&
(ai-n,y
private static Sort[] impl=new Sort[]{ |A/_Qe|s2
new InsertSort(), |Pl{Oo+
new BubbleSort(), [Q_|6Di
new SelectionSort(), Ul0<Zxv
new ShellSort(), LF.~rmPa
new QuickSort(), HtYR 0J
new ImprovedQuickSort(), 4m!3P"$
new MergeSort(), j?hyN@ns
new ImprovedMergeSort(), pz}hh^]t
new HeapSort() tUF]f6
}; 1gej$G@
J7^T!7V.
public static String toString(int algorithm){ |8{iIvi/
return name[algorithm-1]; s:F+bG}|
} WvzvGT=
5d{Ggg{s
public static void sort(int[] data, int algorithm) { pcTXTy 28
impl[algorithm-1].sort(data); k#NMD4(%O
} cD@lorj
pdqa)>$
public static interface Sort { aMg f6veM
public void sort(int[] data); IMrOPwjc
} [y;ZbfMP|o
(MiOrzT
public static void swap(int[] data, int i, int j) { }(}vlL
int temp = data; s\FNKWQ
data = data[j]; T\CQ
data[j] = temp; @Hdg-f>y]
} 8vo7~6yy
} |RXC;zt9s