[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; 1fH2obI~X
} 8@ZZ[9kt
int i1=l; T)Y{>wT
int i2=mid+1; oNEjlV*
for(int cur=l;cur<=r;cur++){ <da-iY\5
if(i1==mid+1) |LLDaA-=0
data[cur]=temp[i2++]; 7!;H$mxP
else if(i2>r) ^j!2I&h1
data[cur]=temp[i1++]; B7QRG0
else if(temp[i1] data[cur]=temp[i1++]; f&L3M)T
else RW`j^q,c3
data[cur]=temp[i2++]; FoQy@GnM5
} d=nv61]
} 9oU1IT9
('~}$%C
} Yycfb
V/&JArW
改进后的归并排序: ]*Cq'<h$
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package org.rut.util.algorithm.support; [C#H _y(
V8hmfV~=]P
import org.rut.util.algorithm.SortUtil; oh0*bh
[.Rdq]w6
/** yU"lJ>Eh}}
* @author treeroot uXouN$&
* @since 2006-2-2 ge4QaK
* @version 1.0 <nk9IAH
*/ ;Rf@S$
public class ImprovedMergeSort implements SortUtil.Sort { s'^sT=b
7>V*gV?v
private static final int THRESHOLD = 10; zCdcwTe
p:;`X!
/* %Ze]6TP/><
* (non-Javadoc) LO;?#e7
* :V0sKg|sS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g)1`A24
*/ sj3[ny;b
public void sort(int[] data) { yBRYEqS+
int[] temp=new int[data.length]; h0&Oy52
mergeSort(data,temp,0,data.length-1); l*w*e.ezQ
} hLr\;Swyp
iv ~<me0F
private void mergeSort(int[] data, int[] temp, int l, int r) { 7O-fc1OTv
int i, j, k; P~*'/!@
int mid = (l + r) / 2; a$5P\_
if (l == r) x#XxD<y
return; G ?Hx"3:?
if ((mid - l) >= THRESHOLD) 5uX-onP\[
mergeSort(data, temp, l, mid); W6s-epsRmT
else gW-mXb
insertSort(data, l, mid - l + 1); /PKu",Azj
if ((r - mid) > THRESHOLD) Mi}.
mergeSort(data, temp, mid + 1, r); n%6ba77
else *zwo="WA\t
insertSort(data, mid + 1, r - mid); aH_0EBRc
+i~kqiy.
for (i = l; i <= mid; i++) { T0{X,
temp = data; v,kvLjqt
} v?YxF}
for (j = 1; j <= r - mid; j++) { |=:<[FU
temp[r - j + 1] = data[j + mid]; 9&bJ]
} C~IE_E&Q`
int a = temp[l]; NM"5.
int b = temp[r]; ]*hH.ZBY"^
for (i = l, j = r, k = l; k <= r; k++) { Pj1k?7
if (a < b) { F_Gc_eT
data[k] = temp[i++]; RF= $SMTk
a = temp; ^X-6j[".
} else { P Ij
data[k] = temp[j--]; ?vfZ>7Q
b = temp[j]; r&+w)U~
} c,:nWf
} p^1~o/
} @qSZ=
/E!N:g<
/** z%1& t4$
* @param data 0DFVB%JdI
* @param l DKF` xuJP
* @param i Ae%AG@L
*/ _\gCdNrD
private void insertSort(int[] data, int start, int len) { ]v]tBVO$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "d`u#YmR
} 7&dK_x,a
} $*:g~#bh
} N@Q_5t0bk
} a2[rY
>Q=Q%~
堆排序： P;eXUF+jn
B1A:}#
package org.rut.util.algorithm.support; Q_Wg4n5
`2/V.REX$h
import org.rut.util.algorithm.SortUtil; yJ="dEn>i"
dZox;_b
/** {:|b,ep T
* @author treeroot tAPf#7{|
* @since 2006-2-2 !;4Hh)2
* @version 1.0 v o4U%
*/ K $WMrp
public class HeapSort implements SortUtil.Sort{ +4Fw13ADE
1Ko4O)L]&
/* (non-Javadoc) +i#s |kKs\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }>EWFE`
*/ H:P7G_!\
public void sort(int[] data) { K) Ums-b
MaxHeap h=new MaxHeap(); !L@<?0xLW
h.init(data); Bg] %
for(int i=0;i h.remove(); Omi/sKFMi
System.arraycopy(h.queue,1,data,0,data.length); I9dX\w}
} Y^nm{;G+
5,4m_fBoW
private static class MaxHeap{ {9@u:(<X9
UmArl)R/
void init(int[] data){ nwMq~I*1
this.queue=new int[data.length+1]; _ds;:*N+qA
for(int i=0;i queue[++size]=data; %E"v@
fixUp(size); {VXucGI|
} 2liJ^ `
} do*aE
D&@Iuo
private int size=0; ?bpVdm!
-:kIIK
private int[] queue; J"Fp),
(L1F],Au
public int get() { >_\[C?8
return queue[1]; `H 'wz7
} ^KnK \
BOh^oQh
public void remove() { B[q"oI`
SortUtil.swap(queue,1,size--); xQ2:tY#?
fixDown(1); CB X}_]9X
} 1+Uem
file://fixdown 1J72*`4OK
private void fixDown(int k) { S;y4Z:!
int j; E[6:}z<
while ((j = k << 1) <= size) { n @,.
if (j < size %26amp;%26amp; queue[j] j++; CxNxb)c &
if (queue[k]>queue[j]) file://不用交换 pp@B]We
break; Ni%@bU $
SortUtil.swap(queue,j,k); @SyL1yFX
k = j; 7xQ:[P!G+
} hu1ZckIw?
} }'faf{W
private void fixUp(int k) { Yg,;l-1
while (k > 1) { ,<'>jaC
int j = k >> 1; d S'J@e=#
if (queue[j]>queue[k]) l^$'6q"
break; $:\`E56\
SortUtil.swap(queue,j,k); 5KDCmw
k = j; oH!O{pQK}
} ,QpFVlPU
} gWoUE7.3`
~ rQ,%dH
} ?Pa(e)8\
/%s:aO
} r/HCWs|
7(oA(l1V
SortUtil： VX82n,'=t
TVx `&C+
package org.rut.util.algorithm; "wuO[c&%/
jd,i=P%
import org.rut.util.algorithm.support.BubbleSort; ~%C F3?e6
import org.rut.util.algorithm.support.HeapSort; lGBg8/[
import org.rut.util.algorithm.support.ImprovedMergeSort; #9Jr?K43
import org.rut.util.algorithm.support.ImprovedQuickSort; n>R(e>
import org.rut.util.algorithm.support.InsertSort; ,lStT+A
import org.rut.util.algorithm.support.MergeSort; 1_#;+S
import org.rut.util.algorithm.support.QuickSort; E1tCY.N{
import org.rut.util.algorithm.support.SelectionSort; dq`{fqGl
import org.rut.util.algorithm.support.ShellSort; 8e3eQ
K!.t}s.t
/** q*|Alrm
* @author treeroot EFljUT?&
* @since 2006-2-2 K5|~iW'
* @version 1.0 >Q!}tbg~9
*/ HZZZ [km
public class SortUtil { P.5l9Ns(O
public final static int INSERT = 1; oC*a;o
public final static int BUBBLE = 2; #{{p4/:
public final static int SELECTION = 3; u '/)l}
public final static int SHELL = 4; aK95&Jyw&
public final static int QUICK = 5; =JgR c7
public final static int IMPROVED_QUICK = 6; R ZQH#+*t}
public final static int MERGE = 7; 1:<(Q2X%
public final static int IMPROVED_MERGE = 8; rhy-o?
public final static int HEAP = 9; } `r.fD
U1X"UN)
public static void sort(int[] data) { ZQ+DAX*MS
sort(data, IMPROVED_QUICK); :i4(cap&}F
} -{ 1P`&G
private static String[] name={ <Q/)SN6_E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ul9^"o
}; K%+4M#jj5
W dD889\
private static Sort[] impl=new Sort[]{ oKCy,Ot<
new InsertSort(), /\b* oPWJ
new BubbleSort(), 9\<q=p~
new SelectionSort(), o2U5irU
new ShellSort(), yDKH;o
new QuickSort(), )J> dGIb
new ImprovedQuickSort(), "q+Z*
new MergeSort(), gqy>;A:kO
new ImprovedMergeSort(), 1' U
new HeapSort() ?%UiW7}j';
}; oJr+RO
p|2GPrA]aL
public static String toString(int algorithm){ -43>?m/a
return name[algorithm-1]; B I)@n:p
} qvB{vU
|cY,@X,X6
public static void sort(int[] data, int algorithm) { R$hIgw+p[
impl[algorithm-1].sort(data); ~M{/cv
} ; Z7!BU
h7q{i|5
public static interface Sort { 5rB>)p05[
public void sort(int[] data); 4RB%r
} gM>?w{!LBx
<_<zrXc]
public static void swap(int[] data, int i, int j) { g"5Kth
int temp = data; GZu12\0nZ
data = data[j]; |<h}'
data[j] = temp; $V!.z%Vgf
} XV]xym~
} 7;AK=;