[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; gDbj!(tm
} dsck:e5agZ
int i1=l; pu#h:nb>88
int i2=mid+1; | a001_Wv
for(int cur=l;cur<=r;cur++){ _8x:%$
if(i1==mid+1) u#(VR]u\7
data[cur]=temp[i2++]; {Q9?Q?
else if(i2>r) kT6h}d^/^
data[cur]=temp[i1++]; jb;!"HC
else if(temp[i1] data[cur]=temp[i1++]; `-@8IZ7
else -PXRd)~
data[cur]=temp[i2++]; q"){PRTm/
} O[%"zO"S
} d%+oCoeb
>np!f8+d"q
} /+^7lQo\]
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改进后的归并排序: N{oi }i6
x!5b" "
package org.rut.util.algorithm.support; ; kPx@C
8@;|x2=y
import org.rut.util.algorithm.SortUtil; k1Z"Qmz
sa8JN.B
/** +tOmKY
* @author treeroot eS(hLXE!7
* @since 2006-2-2 r7B.@+QK
* @version 1.0 ToMvP B);
*/ .\Gl)W
public class ImprovedMergeSort implements SortUtil.Sort { g7\MFertR^
ay~c@RXW
private static final int THRESHOLD = 10; {"{kWbXZ
qe. Qjq
/* t&scvXh
* (non-Javadoc) |2RoDW
* [+,%T;d;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l0Rjq*5hJ
*/ \"=4)Huv
public void sort(int[] data) { dCq-&3?t
int[] temp=new int[data.length]; *}fs@"S
mergeSort(data,temp,0,data.length-1); bY` b3
} TCShS}q;%
WcRTv"4&
private void mergeSort(int[] data, int[] temp, int l, int r) { 2gP^+.
int i, j, k; `^FAD
int mid = (l + r) / 2; VpmwN`
if (l == r) gbvM2
return; wJ.?u]f@
if ((mid - l) >= THRESHOLD) K]c|v i_D
mergeSort(data, temp, l, mid); B%y?+4;zA
else pXn(#n<
insertSort(data, l, mid - l + 1); %[3?vX
if ((r - mid) > THRESHOLD) NsbC0xLd
mergeSort(data, temp, mid + 1, r); 2ed4xhV
else /%qw-v9qPV
insertSort(data, mid + 1, r - mid); E2.@zY|:
w3,DsEXu
for (i = l; i <= mid; i++) { KDTG9KC
temp = data; * AsILK0
} ~|y$^qy?U
for (j = 1; j <= r - mid; j++) { W`^euBr7R>
temp[r - j + 1] = data[j + mid]; ad <z+a
} dU4 h
int a = temp[l]; cf\PG&S
int b = temp[r]; Ltk'`
for (i = l, j = r, k = l; k <= r; k++) { {B;<R1
if (a < b) { tjONN(K`
data[k] = temp[i++]; h\qQ%|X
a = temp; Cu2eMUGt
} else { Y9}5&#
data[k] = temp[j--]; jVW .=FK
b = temp[j]; 1=U(ZX+u
} 5a8[0&hA 2
} IZ9L ;"}
} R\i8O^[
s,z$Vt"h*K
/** ^)i5.o\
* @param data :eHD{=
* @param l He&7(mQ0^
* @param i 4c})LAwd&
*/ *:r6E
private void insertSort(int[] data, int start, int len) { *yx5G-#?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); YJ6y]r K2,
} v3zd>fDnRp
} Z~X\Z.
} vw.rkAGY
} FCr^D$_w
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堆排序： `Zdeq.R]
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package org.rut.util.algorithm.support; s)dL^lj;
!' }
import org.rut.util.algorithm.SortUtil; -'!K("
$m hIXA.
/** AqqD!
* @author treeroot st7\k]J\
* @since 2006-2-2 MC'2;,
* @version 1.0 ejFGeR
*/ NE~R&ym9
public class HeapSort implements SortUtil.Sort{ HQ187IwpTm
n0\k(@+k
/* (non-Javadoc) r%:Q(|v?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X=1Po|
*/ s%cfJe_k
public void sort(int[] data) { / 5\gP//9K
MaxHeap h=new MaxHeap(); 7O.?I# 76
h.init(data); t[r<&1[&
for(int i=0;i h.remove(); ^X?D4a|;#g
System.arraycopy(h.queue,1,data,0,data.length); ;nSOeAF)Q
} _VjfjA<c8
]J '#KT{
private static class MaxHeap{ %pJRu-D
q.}M^iDe
void init(int[] data){ +VSq[P
this.queue=new int[data.length+1]; jV|j]m&t
for(int i=0;i queue[++size]=data; s^&Oh*SP*
fixUp(size); =/#+,
} L2ybL#dz
} nO\c4#ce
6x.ZS'y
private int size=0; e=H,|)P
8h?):e
private int[] queue; ~dtS
HL`=zB%
public int get() { B=<Z@u
return queue[1]; DN X-\
} 7Rq|N$y.3
n5NwiSE
public void remove() { sC}p_'L
SortUtil.swap(queue,1,size--); 78MQoG<
fixDown(1); v1j&oA}$.
} >N bb0T
file://fixdown o5(~nQ
private void fixDown(int k) { i"_@iN0N
int j; \@8.BCWK
while ((j = k << 1) <= size) { m)q e
if (j < size %26amp;%26amp; queue[j] j++; zbL8 pp
if (queue[k]>queue[j]) file://不用交换 `w(~[`F t
break; H6oU Ne
SortUtil.swap(queue,j,k); 0K<|>I
k = j; au;ZAXM|
} (DnrJ.QU}t
} VpO+52&
private void fixUp(int k) { ! N!A%
while (k > 1) { j3Yz=bsQ{c
int j = k >> 1; O{{\jn|lR
if (queue[j]>queue[k]) b%TLvV 9F
break; svWQk9d
SortUtil.swap(queue,j,k); %7wNS
k = j; 9j8<Fs0M
} q}+Fm?B
} =jWjUkm2
0|chRX
} }od5kK;
' X9D(?O
} $&ZN%o3
x-@}x@n&[
SortUtil： hMNC]
DX b=Ku
package org.rut.util.algorithm; +M{A4nYY|1
Uaz$<K6
import org.rut.util.algorithm.support.BubbleSort; \:5M0
import org.rut.util.algorithm.support.HeapSort; =U`9_]~1c@
import org.rut.util.algorithm.support.ImprovedMergeSort; O/ih9,
import org.rut.util.algorithm.support.ImprovedQuickSort; U{Xx)l/o
import org.rut.util.algorithm.support.InsertSort; YVW`|'7)|
import org.rut.util.algorithm.support.MergeSort; y?-zQs0
import org.rut.util.algorithm.support.QuickSort; .QLjaEja
import org.rut.util.algorithm.support.SelectionSort; KmX?W/%R
import org.rut.util.algorithm.support.ShellSort; xsERnF>`
)OE!vA
/** r^Mu`*x*
* @author treeroot Ls2g#+
* @since 2006-2-2 "/g\?Nce
* @version 1.0 T\OpPSYbl
*/ KM9)
public class SortUtil { $gPR3*0
public final static int INSERT = 1; ',l}$]y5
public final static int BUBBLE = 2; iebnQf
public final static int SELECTION = 3; LSlYYyt
public final static int SHELL = 4; 7H$wpn Zln
public final static int QUICK = 5; 9k*1_
public final static int IMPROVED_QUICK = 6; Mrly(*!U"@
public final static int MERGE = 7; sIz*r Gz
public final static int IMPROVED_MERGE = 8; ;8iK];^
public final static int HEAP = 9; f2]O5rXp
TD^w|U.
public static void sort(int[] data) { !WgVk7aP`
sort(data, IMPROVED_QUICK); C#oH7o+_.
} [eLU}4v{
private static String[] name={ Z` zyEP A
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (&@,ZI;
}; =;m;r!,K
di|5|bn7
private static Sort[] impl=new Sort[]{ Z~6PrM-M
new InsertSort(), O!ngQrI
new BubbleSort(), S7kZpD$
new SelectionSort(), ;0JK>c ]#
new ShellSort(), e"^n^_9
new QuickSort(), `&/~%>
new ImprovedQuickSort(), aQ#6PO7.Z
new MergeSort(), {Q/_I@m].
new ImprovedMergeSort(), EF5:$#
new HeapSort() X775j"<d
}; i"GCm`
9*CJWS;
public static String toString(int algorithm){ 9 lH00n+'
return name[algorithm-1]; TYu(;~
} Q$:>yveR*
lEr_4!h$rZ
public static void sort(int[] data, int algorithm) { hMQh?sF/
impl[algorithm-1].sort(data); k3VRa|Y")
} t_NnQ4)=
vE$n0bL2
public static interface Sort { >pj)va[Q
public void sort(int[] data); <F&53N&Zc
} 9^2l<4^Z
]MaD7q>+R
public static void swap(int[] data, int i, int j) { .3:s4=(f
int temp = data; "jA?s9
data = data[j]; Yue#
data[j] = temp; Sc,ajT
} th]pqhl>
} !+{$dB>a