[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; mNs&*h}
} 7zy6`OP
int i1=l; bl:.D~@
int i2=mid+1; jYuH zf
for(int cur=l;cur<=r;cur++){ &grT}
if(i1==mid+1) H{9di\xnEm
data[cur]=temp[i2++]; Oi=kL{DG:s
else if(i2>r) VBsS1!g
data[cur]=temp[i1++]; O~w&4F;{
else if(temp[i1] data[cur]=temp[i1++]; Rsqb<+7
else ULAAY$o@5
data[cur]=temp[i2++]; 7X1T9'jI2
} KLlW\MF1
} *qGxQ?/
j@Z4(XL
} ,GGr@})
lS9rgq<n
改进后的归并排序: P b2exS(
p]IF=~b
package org.rut.util.algorithm.support; i!jxjP
)CEfG
import org.rut.util.algorithm.SortUtil; ~x`OCii
`0Qzu\gRb
/** k6.}.
* @author treeroot l *.#g
* @since 2006-2-2 gHA"O@HgDI
* @version 1.0 "ifYy>d
*/ leX&py
public class ImprovedMergeSort implements SortUtil.Sort { *N<~"D
hbzU?_}
private static final int THRESHOLD = 10; a\aJw[d{
ZB<goEg
/* A2g+m
* (non-Javadoc) g!cTG-bh>J
* TDk'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iIA&\'|;i
*/ M-"%4^8_
public void sort(int[] data) { jBarYg
int[] temp=new int[data.length]; Hj$JXo[U
mergeSort(data,temp,0,data.length-1); WOG=Uy$
} 3<CCC+47
MAQkk%6[g
private void mergeSort(int[] data, int[] temp, int l, int r) { E"nIC,VZ
int i, j, k; `(.K|l}
int mid = (l + r) / 2; PiP\T.XANa
if (l == r) y2yW91B,
return; OT&J OTk\
if ((mid - l) >= THRESHOLD) W{Ine> a'
mergeSort(data, temp, l, mid); DHd9yP9-
else TE3A(N'
insertSort(data, l, mid - l + 1); -y)ij``VY
if ((r - mid) > THRESHOLD) }RDGk+x7|
mergeSort(data, temp, mid + 1, r); oxha8CF]D
else >7p?^*&7;
insertSort(data, mid + 1, r - mid); 8dNwi&4
7q^osOj"
for (i = l; i <= mid; i++) { y08.R. l
temp = data; |Xlpgdiu
} 4(f[Z9 iZ]
for (j = 1; j <= r - mid; j++) { db'Jl^
temp[r - j + 1] = data[j + mid]; Zchs/C 9{
} 2X!O '
int a = temp[l]; {'NdN+_C
int b = temp[r]; B#N(PvtE
for (i = l, j = r, k = l; k <= r; k++) { D ]:sR
if (a < b) { R6r'[-B2
data[k] = temp[i++]; Cq(dj^/~m
a = temp; Xk8+m>
} else { esIEi!d
data[k] = temp[j--]; mw-0n
b = temp[j]; `<cB 6
} q~48lxDU
} q]ER_]%Gna
} 2Xys;Dwx
k^:)|Z
/** 8vOKm)[%
* @param data c,:xm=&
* @param l QX1QYwcmG
* @param i ~k'KS 7c
*/ ]v{f!r=}
private void insertSort(int[] data, int start, int len) { ;!v2kVuS]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); R'`q0MoN1
} UR>zL3
} $e)d!m.
} J=JYf_=4bc
} ~Pq1@N>n
FctqE/>}I
堆排序： J\^ZRu_K
<C`qJP-
package org.rut.util.algorithm.support; XCc/\
$vlq]6V8
import org.rut.util.algorithm.SortUtil; PGF=q|j9K
*7u~`
/** O0`sg90,C
* @author treeroot rlEEf/m:
* @since 2006-2-2 o{f|==<t3#
* @version 1.0 ;}"_hLX
*/ [p^N].K$
public class HeapSort implements SortUtil.Sort{ X`JWYb4
"7mYs)=
/* (non-Javadoc) RB`Emp&T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) GVP"~I~/:
*/ ]r8t^bqe
public void sort(int[] data) { pC2ZN
MaxHeap h=new MaxHeap(); [DpGL/Y.
h.init(data); e[.c^Hw
for(int i=0;i h.remove(); jT}3Zn
System.arraycopy(h.queue,1,data,0,data.length); A[`c2v-hF
} QV,X> !Nz
'Alt+O_
private static class MaxHeap{ J6r"_>)z
bw\fKZ
void init(int[] data){ &MKG#Y}
this.queue=new int[data.length+1]; 3z';Zwz &X
for(int i=0;i queue[++size]=data; +LuGjDn0
fixUp(size); EhL 8rR
} KJ M:-z@
} ufyqfID
eM Ym@~4
private int size=0; Y /$`vgqs
=@q 9,H
private int[] queue; q<Gn@xc'
e=ZwhRP
public int get() { J6J[\
return queue[1]; Ysbd4rN
} $fES06%
F9@,T8I
public void remove() { &.J8O+
SortUtil.swap(queue,1,size--); INtt0Cm9"
fixDown(1); cVya~ *
} *y<Ru:D
file://fixdown __o`+^FS
private void fixDown(int k) { ]wFKXZeK
int j; ?@8[1$1a
while ((j = k << 1) <= size) { .@KpN*`KH
if (j < size %26amp;%26amp; queue[j] j++; golr,+LSo
if (queue[k]>queue[j]) file://不用交换 {@, } M
break; ^wNx5t
SortUtil.swap(queue,j,k); 9c9FC
k = j; BNns#Q8a
} =%P'?(o|
} acr@erk
private void fixUp(int k) { E]$YM5
while (k > 1) { Jf6uE?.
int j = k >> 1; Elthxj
if (queue[j]>queue[k]) FYq]-k{\
break; 9ZFvN*Zf'
SortUtil.swap(queue,j,k); 7fRL'I#[@
k = j; f0H 5 )DJf
} AE0d0Y~9
} 'NCxVbyYD
yZkHBG4
} e[_W( v
,Fo7E
} C/V{&/5w
=Lx*TbsFYt
SortUtil： ]+A>*0#"
.I\)1kjX
package org.rut.util.algorithm; :a$ZYyD
/!J1}S
import org.rut.util.algorithm.support.BubbleSort; vl59|W6
import org.rut.util.algorithm.support.HeapSort; BMPLL2I
import org.rut.util.algorithm.support.ImprovedMergeSort; cfI5KLG~#
import org.rut.util.algorithm.support.ImprovedQuickSort; [GKSQt{)
import org.rut.util.algorithm.support.InsertSort; Cx$C+
import org.rut.util.algorithm.support.MergeSort; v\7k
import org.rut.util.algorithm.support.QuickSort; s33< }O0
import org.rut.util.algorithm.support.SelectionSort; rK&ofc]f$
import org.rut.util.algorithm.support.ShellSort; $jMU|{
eBiP\
/** l*]9
* @author treeroot /LMb~Hy,
* @since 2006-2-2 k<W n
* @version 1.0 $mFsf)1]]?
*/ Jg#L8>p1
public class SortUtil { 09?n5x!6
public final static int INSERT = 1; Yas!w'
public final static int BUBBLE = 2; K8E:8`_cx
public final static int SELECTION = 3; ~@a7RiE@
public final static int SHELL = 4; @?ntMh6
public final static int QUICK = 5; +<&\*VR
public final static int IMPROVED_QUICK = 6; s)Sa KE*d
public final static int MERGE = 7; G#n99X@-
public final static int IMPROVED_MERGE = 8; `L0aQ$'>z
public final static int HEAP = 9; DDxNqVVt4
Zur7"OkQ
public static void sort(int[] data) { OdX-.FFl
sort(data, IMPROVED_QUICK); CORX .PQ
} UJ' +Z6d
private static String[] name={ g*$ 0G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bm1+|gssn
}; cGSoAK
[{3WHS.
private static Sort[] impl=new Sort[]{ <()xO(
new InsertSort(), R<W#.mpo6
new BubbleSort(), L'=e /&
new SelectionSort(), xTQV?g J
new ShellSort(), ,Ie~zZE&
new QuickSort(), EN@LB2
new ImprovedQuickSort(), 6S?a57;&W
new MergeSort(), ^Q8m)0DP
new ImprovedMergeSort(), n=v4m_e
new HeapSort() it!i'lG
}; !fdni}f)
{#M=gDhbX
public static String toString(int algorithm){ u:H@]z(x
return name[algorithm-1]; ]RHR>=;
} PHRc*G{
X'N4a
public static void sort(int[] data, int algorithm) { wd*i&ooQ*L
impl[algorithm-1].sort(data); -k\7k2
} N>i1TM2
aM'0O![d
public static interface Sort { ,-u | l
public void sort(int[] data); &H\$O.?f
} [o&Vr\.$
A?Jm59{w
public static void swap(int[] data, int i, int j) { b7fP)nb695
int temp = data; 'N,3]Soi
data = data[j]; |E@Gsw
data[j] = temp; JA7HO|
} 6 .DJRY
} g-xbb&]