[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; /nO_e
} TzKM~a#
int i1=l; && ]ix3
int i2=mid+1; WSozDNF!'f
for(int cur=l;cur<=r;cur++){ lV'?X%
if(i1==mid+1) 1K/HVj+'.
data[cur]=temp[i2++]; ?8O5%IrJ
else if(i2>r) g:!U,<C^a
data[cur]=temp[i1++]; (-S^L'v62v
else if(temp[i1] data[cur]=temp[i1++]; <-1:o*8:}
else U6-47m0%
data[cur]=temp[i2++]; Mi.#x_
} ;` L%^WZ;-
} k+"];
v~OMm\
} ;r@=[h
7&id(&y/
改进后的归并排序: ,1I-%6L
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package org.rut.util.algorithm.support; LVUA"'6V
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import org.rut.util.algorithm.SortUtil; vd%AV(]<LJ
"nz\YQdg
/** r5gqRh}+
* @author treeroot '-"[>`[q
* @since 2006-2-2 Z`kVyuQ
* @version 1.0 oaj.5hM
*/ NnAIL;WS
public class ImprovedMergeSort implements SortUtil.Sort { E:qh}wY
kI"9T`owR
private static final int THRESHOLD = 10; !>F70
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/* ^x0N]/
* (non-Javadoc) 6|=]i-8
* l$5nv5r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qb;b.P?~D$
*/ Ys.GBSlHG
public void sort(int[] data) { .-YE(}^
int[] temp=new int[data.length]; @KM?agtlbl
mergeSort(data,temp,0,data.length-1); f I%8@ :
} GJWGT`"
w7`pbcY,
private void mergeSort(int[] data, int[] temp, int l, int r) { S0StC$$1
int i, j, k; Ab[o~X"
int mid = (l + r) / 2; b"\lF1Nf&o
if (l == r) fTpG>*{p
return; jUD^]Qs
if ((mid - l) >= THRESHOLD) vVMoCG"f
mergeSort(data, temp, l, mid); F=Xb_Gd`
else 3rK\ f4'
insertSort(data, l, mid - l + 1); 8GBKFNR8
if ((r - mid) > THRESHOLD) E q4tcZ
mergeSort(data, temp, mid + 1, r); #6a!OQj
else l[~$9C'ji
insertSort(data, mid + 1, r - mid); sPc}hG+N
vw>(JCR
for (i = l; i <= mid; i++) { ktPM66`b
temp = data; z4 =OR@ h
} .<vXj QE
for (j = 1; j <= r - mid; j++) { _#Hd2h
temp[r - j + 1] = data[j + mid]; >NPK;Vu
} .,6o):
int a = temp[l]; HT/!+#W.
int b = temp[r]; ,8zJD&HMx
for (i = l, j = r, k = l; k <= r; k++) { i%!<9D~n
if (a < b) { 4IW fp&Q!
data[k] = temp[i++]; 3XB`|\:
a = temp; t;Z9p7rk
} else { +wz1kPRs
data[k] = temp[j--]; 7:g_:}m
b = temp[j]; [*u\S
} LL);Ym9d
} $S' TW3
} Lios1|5
..Dm@m}
/** /&\V6=jA1
* @param data Pm#/j;
* @param l )a0l:jEOc
* @param i ;HAvor=?
*/ Q\zaa9P
private void insertSort(int[] data, int start, int len) { kIa16m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9:g A0Z
} _1RvK? ;.{
} E5A"sB
} 3f$n8>mq
} D5xQ
CH(Y.Kj-
堆排序： M]X!D7
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package org.rut.util.algorithm.support; EKO'S+~
:LB*l5\
import org.rut.util.algorithm.SortUtil; ~)#E?:h5
LK4NNZf7
/** ">!pos`<C
* @author treeroot =c 9nC;C
* @since 2006-2-2 '4d4i
* @version 1.0 ysi=}+F.
*/ IAzFwlO9
public class HeapSort implements SortUtil.Sort{ p2(ha3PW
fJ\?+,
/* (non-Javadoc) ] 7[#K^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k?HdW(HA
*/ q|%+?j(
public void sort(int[] data) { J<H]vs
MaxHeap h=new MaxHeap(); :~Ra}
h.init(data); Y,L[0%
for(int i=0;i h.remove(); X]9<1[f
System.arraycopy(h.queue,1,data,0,data.length); lH?jqp
} q{}5wM
t$,G%micj
private static class MaxHeap{ 4Th?q{X
%}H 2
void init(int[] data){ 6:S, {@G
this.queue=new int[data.length+1]; MCTJ^g"D
for(int i=0;i queue[++size]=data; i._RMl5zg
fixUp(size); Fs~*-R$
} x>mI$K(6M
} wQhuU
lvODhoT
private int size=0; /~s<@<1!X
OcWKK!A
private int[] queue; \:s%;s51
\z6UWZ
public int get() { d 4tL
return queue[1]; >Vx_Xv`Jwb
} ]v5/K
)uAY_()/
public void remove() { DazoY&AWE
SortUtil.swap(queue,1,size--); X0+E!~X$zM
fixDown(1); AH/^v;-
} GK-P6d
file://fixdown hC8WRxEGq
private void fixDown(int k) { 8a@k6OZ
int j; OY(CB(2N
while ((j = k << 1) <= size) { <K&A/Ue
if (j < size %26amp;%26amp; queue[j] j++; ^HR8.9^[1u
if (queue[k]>queue[j]) file://不用交换 {[:C_Up)f
break; raOuD3
SortUtil.swap(queue,j,k); N LQ".mM+
k = j; f U=P$s
} AfhJ6cSIE
} aaf}AIL.
private void fixUp(int k) { f*"T]AX0
while (k > 1) { M`q|GY
int j = k >> 1; XM+.Hel
if (queue[j]>queue[k]) i"n_oO
break; 6Q>:vQ+E
SortUtil.swap(queue,j,k); oV['%Z'
k = j; tA4Ra,-c
} n6,YA2yZO
} vy5Fw&?"
!^y;|9?O
} -3? <Ja
KyT=:f V
} Q5dqn"?
P-[})Z=
SortUtil： !pRu?5
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package org.rut.util.algorithm; 2V%z=
VHqoa>U,*
import org.rut.util.algorithm.support.BubbleSort; 7neJV
import org.rut.util.algorithm.support.HeapSort; ct|0zl~
import org.rut.util.algorithm.support.ImprovedMergeSort; gloG_*W
import org.rut.util.algorithm.support.ImprovedQuickSort; |uz<)
import org.rut.util.algorithm.support.InsertSort; <Qv/# k
import org.rut.util.algorithm.support.MergeSort; \reVA$M[
import org.rut.util.algorithm.support.QuickSort; W;R6+@I[
import org.rut.util.algorithm.support.SelectionSort; XNx$^I=
import org.rut.util.algorithm.support.ShellSort; EUI*:JU-
:+>7m
/** '?m2|9~
* @author treeroot ipMSMk7gx
* @since 2006-2-2 - |DWPU!"
* @version 1.0 5tkKd4VfL
*/ PN9vg9'
public class SortUtil { KC; o
public final static int INSERT = 1; [/*;}NUv
public final static int BUBBLE = 2; ;Qq_
public final static int SELECTION = 3; 6RxI9{ry
public final static int SHELL = 4; C[%&;\3S@
public final static int QUICK = 5; Sn'!Nq>
public final static int IMPROVED_QUICK = 6; 6y Muj<L
public final static int MERGE = 7; '3^qW
public final static int IMPROVED_MERGE = 8; RAhDSDf
public final static int HEAP = 9; vf>d{F^rv
Bi;a~qE
public static void sort(int[] data) { }OnU32P
sort(data, IMPROVED_QUICK); `_GCS,/t
} bcT_YFLQ
private static String[] name={ YWd2bRb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `)]W~
}; D9P,[:"
:,v(lq
private static Sort[] impl=new Sort[]{ v,Z]Vqk
new InsertSort(), (ot56`,k
new BubbleSort(), Z/:yYSq
new SelectionSort(), E Lq1
new ShellSort(), ;c]O*\/
new QuickSort(), k0PwAt)65
new ImprovedQuickSort(), "v wLj:
new MergeSort(), $ eL-fg
new ImprovedMergeSort(), 1TA!9cz0Z
new HeapSort() G8w@C
}; mYJ8O$
uMGy-c
public static String toString(int algorithm){ jCtk3No
return name[algorithm-1]; H'k~;
} Jpp-3i.F#
'>1M~B
public static void sort(int[] data, int algorithm) { Z)~?foe'
impl[algorithm-1].sort(data); OOIp)=4
} &,PA+#
Z>3~n
public static interface Sort { [ywF!#'){
public void sort(int[] data); Hr}"g@ <
} WhH60/`
5"3`ss<m
public static void swap(int[] data, int i, int j) { I+kL;YdS
int temp = data; iKu3'jZ/O
data = data[j]; tFn[U#'
data[j] = temp; =Oh$pZRymu
} nXfz@q
} O,^s)>c