[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; py!|\00}
} &MQmu,4
int i1=l; X6X $Pve
int i2=mid+1; )gIKH{JYL
for(int cur=l;cur<=r;cur++){ ^WgX Qtn
if(i1==mid+1) Xm}/0g&7
data[cur]=temp[i2++]; $E~`\o%Ev
else if(i2>r) _\G"9,)u'
data[cur]=temp[i1++]; 7M!I8C0!aO
else if(temp[i1] data[cur]=temp[i1++]; HxV=F66"
else HY*Kb+[
data[cur]=temp[i2++]; Y@vTaE^w3
} QzVnL U)
} W=><)miQ@
@7]yl&LZ
} oy=js -
1\~ "VF*{
改进后的归并排序: ? 7n`A >T
xb~yM%*c
package org.rut.util.algorithm.support; ,t?B+$E
|(E FY\
import org.rut.util.algorithm.SortUtil; Xll}x+'uZK
O)*+="Rg
/** O!#g<`r{K
* @author treeroot uAJx.>$b
* @since 2006-2-2 NZLxHD]mp
* @version 1.0 ?m}s4a
*/ :D6 ON"6
public class ImprovedMergeSort implements SortUtil.Sort { m)t;9J5
`l ^9/_g'6
private static final int THRESHOLD = 10; L-WT]&n_
)._;~z!
/* Fn;SF4KOm
* (non-Javadoc) q4:o#K#
* Uw. `7b>B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8,4"uuI
*/ { ]{/t-=
public void sort(int[] data) { <4si/=
int[] temp=new int[data.length]; }<v@01
mergeSort(data,temp,0,data.length-1); 5y[Oj^
} iDp)FQ$
x7&B$.>3
private void mergeSort(int[] data, int[] temp, int l, int r) { @s;;O\
int i, j, k; EoR}Af
int mid = (l + r) / 2; IqaT?+O\?r
if (l == r) 3*"WG O5
return; XK3tgaH
if ((mid - l) >= THRESHOLD) l'-Bu(
mergeSort(data, temp, l, mid); qFCOUl
else wx= $2N6
insertSort(data, l, mid - l + 1); ?}tFN_X"
if ((r - mid) > THRESHOLD) *=/ { HvJ
mergeSort(data, temp, mid + 1, r); +US!YU
else @sW24J1q+
insertSort(data, mid + 1, r - mid); W.f/pu
x;P_1J%Q
for (i = l; i <= mid; i++) { .\ULbN3Z
temp = data; d9fC<Tp
} :841qCW
for (j = 1; j <= r - mid; j++) { NI76U
temp[r - j + 1] = data[j + mid]; fP 1[[3i
} }(J}f)
int a = temp[l]; ;;OAQ`
int b = temp[r]; O>bC2;+s
for (i = l, j = r, k = l; k <= r; k++) { X1x#6 oi
if (a < b) { h6D<go-b56
data[k] = temp[i++]; TCwFPlF|
a = temp; o4F2%0gJ
} else { +s,=lL
data[k] = temp[j--]; !&y8@MD15
b = temp[j]; ~*&H$6NJS
} NqazpB*
} w7.V6S$Ga
} +K:Dx!9
D09Sg%w
/** EPI4!3]
* @param data #C74z$
* @param l T= y}y
* @param i ["k,QX
*/ i/;\7n
private void insertSort(int[] data, int start, int len) { Q0`wt.}V2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); / |;RV"
} _lJ!R:*
} mW(W\'~_~
} zx"s*:O
} ~zJbK. _
by1<[$8r
堆排序： Olt?~}
#?U}&Bd
package org.rut.util.algorithm.support; ,*TmIPNK
M>xK+q?O
import org.rut.util.algorithm.SortUtil; B:yGS*.tu
;s= l52
/** J@HtoTDO3
* @author treeroot Q2w_X8
* @since 2006-2-2 -n~1C{<
* @version 1.0 5,lEx1{_
*/ hP%M?MKC
public class HeapSort implements SortUtil.Sort{ y{B=-\O]
e\`&p
/* (non-Javadoc) MC&` oX[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Tj`,Z5vy
*/ 5K1)1E/Fu
public void sort(int[] data) { ~]|6T~+]83
MaxHeap h=new MaxHeap(); ntX3Nt_n
h.init(data); :\`o8`
for(int i=0;i h.remove(); }#RakV4
System.arraycopy(h.queue,1,data,0,data.length); ,GhS[VJjR
} ,hm\
iJI }TVep#
private static class MaxHeap{ I3{PZhU.
CAig]=2'
void init(int[] data){ Wq D4YGN
this.queue=new int[data.length+1]; 2G& a{
for(int i=0;i queue[++size]=data; K^)Eb(4
fixUp(size); '5#^i:
} hohfE3rd
} T[w]o}>cW
_2Zx?<] 2E
private int size=0; h9&0Z+zs
!3c\NbU
private int[] queue; 1Z/(G1
a{'vN93
public int get() { g]l''7G
return queue[1]; cN-?l7
} gS!:+G%
t9GR69v:?
public void remove() { ^,lIK+#Elz
SortUtil.swap(queue,1,size--); TPQ%L@^L+
fixDown(1); HYD'.uj
} htO+z7
file://fixdown Y!aSs3c
private void fixDown(int k) { >NGj =L<
int j; g{]0sn#
while ((j = k << 1) <= size) { 8rAg\H3E
if (j < size %26amp;%26amp; queue[j] j++; WH#1zv
if (queue[k]>queue[j]) file://不用交换 ]!W=^!
break; .FP$m?
SortUtil.swap(queue,j,k); q<x/Hat)
k = j; +B,}Qr
} T8?Ghbn
} ,1.p%UE]>
private void fixUp(int k) { <6%?OJhp
while (k > 1) { e-})6)XgA
int j = k >> 1; GLH0 ]
if (queue[j]>queue[k]) U#7#aeI
break; p}}R-D&K
SortUtil.swap(queue,j,k); x xHY+(m
k = j; S1T"Z{$
} Ea=8}6`s
} D=A&+6B@-
XAD- 'i
} Si4!R+4w
#ZUI)9My@
} 4@+`q *
CCs%%U/=
SortUtil： $8)+XmsCr
~TF:.8
package org.rut.util.algorithm; ^2:p|:Bz!l
Y Vt% 0
import org.rut.util.algorithm.support.BubbleSort; OR P\b
import org.rut.util.algorithm.support.HeapSort; X~bX5b[P
import org.rut.util.algorithm.support.ImprovedMergeSort; CImWd.W9~
import org.rut.util.algorithm.support.ImprovedQuickSort; \Gef \
import org.rut.util.algorithm.support.InsertSort; Y,qI@n<
import org.rut.util.algorithm.support.MergeSort; hk;5w{t}}
import org.rut.util.algorithm.support.QuickSort; v4a8}G
import org.rut.util.algorithm.support.SelectionSort; +qN>.y!Y
import org.rut.util.algorithm.support.ShellSort; r5S[-`s;
'0;l]/i.
/** ^ox=HNV
* @author treeroot @Z_x.Y6
* @since 2006-2-2 0Uz"^xO["
* @version 1.0 aL\PGdgO
*/ L8@f-Kk
public class SortUtil { c`)\Pb/O
public final static int INSERT = 1; R+hU8 pu
public final static int BUBBLE = 2; MVpGWTH@F
public final static int SELECTION = 3; ~p6 V,Q
public final static int SHELL = 4; EgEa1l!NSQ
public final static int QUICK = 5; dM.f]-g
public final static int IMPROVED_QUICK = 6; (' (K9@}
public final static int MERGE = 7; GhAlx/K
public final static int IMPROVED_MERGE = 8; 7uqzm
public final static int HEAP = 9; B&M%I:i
SBu"3ym
public static void sort(int[] data) { $j%'{)gK
sort(data, IMPROVED_QUICK); YsC>i`n9
} ,C\i^>=
private static String[] name={ (!u~CZ;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^cC,.Fdw
}; ^'MT0j
c1(RuP:S
private static Sort[] impl=new Sort[]{ .|KyNBn
new InsertSort(), 1/B>XkCJ
new BubbleSort(), U7,e/?a
new SelectionSort(), |w~nVRb
new ShellSort(), EmWn%eMN
new QuickSort(), AG nxYV"p
new ImprovedQuickSort(), vQG5*pR*w
new MergeSort(), P7bMIe
new ImprovedMergeSort(), Bpo4?nCl}
new HeapSort() 5:[0z5Hww
}; [C 7^r3w
88O8wJN
public static String toString(int algorithm){ ]"As1"
return name[algorithm-1]; r.=K~A
} R{`(c/%8
6?gW-1mY
public static void sort(int[] data, int algorithm) { q4h]o^+
impl[algorithm-1].sort(data); x3=A:}t8
} 8.1c?S
'T;P;:!\
public static interface Sort { _IHV7*u{;
public void sort(int[] data); HQ_Ok`
} ^rR1ZVY
v|,1[i{
public static void swap(int[] data, int i, int j) { _#E0g'3
int temp = data; :wyno#8`-
data = data[j]; Vi$~-6n&
data[j] = temp; i$"F{|Z0
} BN5[,J
} %bn jgy