[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; ZGH2
} A +e ={-*
int i1=l; K p~x
int i2=mid+1; 59FAhEg
for(int cur=l;cur<=r;cur++){ {ajaM'x
if(i1==mid+1) BXnSkT7
data[cur]=temp[i2++]; oV&AJ=|\
else if(i2>r) vp{jh-&
data[cur]=temp[i1++]; y4w{8;Mh
else if(temp[i1] data[cur]=temp[i1++]; t+|c)"\5h
else (kK6=Mrf
data[cur]=temp[i2++]; ^8ZVB.Fv
} a=.A/;|0*
} "z1\I\ ^
GxuFO5wz
} jyb/aov
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改进后的归并排序: WIa4!\Ky!
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package org.rut.util.algorithm.support; vxzh|uF
TG=) KS
import org.rut.util.algorithm.SortUtil; `lRZQ:27X
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/** *[) b}?
* @author treeroot {AoH
* @since 2006-2-2 \/xWsbG\
* @version 1.0 f-E]!\Pg
*/ Rs$k3
public class ImprovedMergeSort implements SortUtil.Sort { *&Np;^~
4nN%5c~=
private static final int THRESHOLD = 10; 9r+]V=
3<88j&9
/* kXFgvIpg<
* (non-Javadoc) 1 `hj]@.]
* /EZF5_`bT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pd?3_yU
*/ BA4qQCS;5
public void sort(int[] data) { ps\A\aggML
int[] temp=new int[data.length]; _?x*F?5=
mergeSort(data,temp,0,data.length-1); b%IRIi&,
} WZOi,
p-POg%|&<
private void mergeSort(int[] data, int[] temp, int l, int r) { ,edX;`#
int i, j, k; )hGRq'WA=
int mid = (l + r) / 2; :aS8%m
if (l == r) F4xYfbwY"]
return; H~Xi;[{7
if ((mid - l) >= THRESHOLD) &^=6W3RD
mergeSort(data, temp, l, mid); F*_g3K!!
else xc7Wk&{=
insertSort(data, l, mid - l + 1); wR@&C\}9
if ((r - mid) > THRESHOLD) $!h21
mergeSort(data, temp, mid + 1, r); <7NY.zvwk]
else ae`*0wbv
insertSort(data, mid + 1, r - mid); :P1 J>dcG
]?whx&+
for (i = l; i <= mid; i++) { 8=Xy19<;t
temp = data; s.d }*H-o
} d~M;@<eD
for (j = 1; j <= r - mid; j++) { 'H+H4(
temp[r - j + 1] = data[j + mid]; _WO*N9Iz
} F'^6ra9
int a = temp[l]; ;7Cb!v1
int b = temp[r]; [xe(FFl+
for (i = l, j = r, k = l; k <= r; k++) { se(ZiyHp
if (a < b) { P~HzNC
data[k] = temp[i++]; Q(=} PF
a = temp; h;?=:(
} else { rtd&WkU rD
data[k] = temp[j--]; Xxhzzm-B
b = temp[j]; 00X~/'!
} Wnm?a!j5
} a NhI<.v
} owM3Gz%?UA
biLx-F c
/** }SpjB
* @param data scZdDbL6+
* @param l 4iMo&E<
* @param i \Ld/'Z;w
*/ CT(VV6I\
private void insertSort(int[] data, int start, int len) { \X1?,gV_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); f86h"#4
} Gw%P5 r}Y
} "& h;\hL
} I<yd=#:n
} `}<x"f7.z
/D2 cY>
堆排序： E_k<EQ%r
ElLDSo@WvR
package org.rut.util.algorithm.support; #D4gNQg@R
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import org.rut.util.algorithm.SortUtil; U-!+Cxjs
r1dP9MT\8
/** HQqnJ;ns<
* @author treeroot 3Run.Gv\
* @since 2006-2-2 QlT{8uw)
* @version 1.0 *q**,_?;
*/ av|r^zc
public class HeapSort implements SortUtil.Sort{ \[u7y. b
=M39I&N
/* (non-Javadoc) l`"i'P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) otaB$Bb
*/ a^wGc+
public void sort(int[] data) { www#.D%'U
MaxHeap h=new MaxHeap(); ^U1@ hq*u
h.init(data); 3jH-!M5
for(int i=0;i h.remove(); 3,;;C(
System.arraycopy(h.queue,1,data,0,data.length); CRXIVver
} BOqu$f+
b7;`A~{9v
private static class MaxHeap{ hdW}._
,n)f=q*%
void init(int[] data){ LcL|'S)
this.queue=new int[data.length+1]; "`WcE/(
for(int i=0;i queue[++size]=data; A6-K~z^
fixUp(size); M18<d1*
} L>:YGM"sL
} D3,9X#B=
pYXusS7S
private int size=0; ^&^~LKl~
>|[ l?`
private int[] queue; ;.dyuKlI
woI.1e5
public int get() { [3KP@'52k
return queue[1]; )P>-~G2P
} +bO]9*g]
NW$_w
public void remove() { UqsJ44QEZ
SortUtil.swap(queue,1,size--); W_JFe(=3,
fixDown(1); rt +a/:4+
} $Sg5xkV,a
file://fixdown E(%_aFx>/
private void fixDown(int k) { 9:[L WT&
int j; 6d%V=1^F
while ((j = k << 1) <= size) { Eu;f~ V
if (j < size %26amp;%26amp; queue[j] j++; Tw`n3y?
if (queue[k]>queue[j]) file://不用交换 $eqwn&$n
break; FR5P;Yz%H
SortUtil.swap(queue,j,k); acG4u+[ ]
k = j; V@%:y tDf
} O:G5n 5J
} p0r:U<&
private void fixUp(int k) { p1}m_
while (k > 1) { ]|6)'L&]*s
int j = k >> 1; yv),>4_6
if (queue[j]>queue[k]) M9*#8>
break; :9c[J$R4
SortUtil.swap(queue,j,k); hW~XE{<
k = j; 0 rge]w.X
} Qg^Ga0Lf6
} 3n ~n-Jo
j*XhBWE?
} aFfd!a"n
l:'\3-2a
} a%FM)/oI|T
0-VC$)S
SortUtil： Y:;]qoF
]?1n-w.}r
package org.rut.util.algorithm; IXA3G7$)
V$OZC;4
import org.rut.util.algorithm.support.BubbleSort; VyF|d?b
import org.rut.util.algorithm.support.HeapSort; A3su!I2S
import org.rut.util.algorithm.support.ImprovedMergeSort; ZjB]pG+
import org.rut.util.algorithm.support.ImprovedQuickSort; z+~klv3
import org.rut.util.algorithm.support.InsertSort; }4dbS ;C<
import org.rut.util.algorithm.support.MergeSort; 8(jUCD
import org.rut.util.algorithm.support.QuickSort; \7\7i-Vo
import org.rut.util.algorithm.support.SelectionSort; {D>@ZC
import org.rut.util.algorithm.support.ShellSort; EklcnM|6
_{k-&I
/** n^xB_DJ~
* @author treeroot wr`+xYuuC=
* @since 2006-2-2 kiP-^Wan
* @version 1.0 +xL*`fn
*/ -%,3qhsd
public class SortUtil { O/{X:Ja{
public final static int INSERT = 1; D~^P}_e.
public final static int BUBBLE = 2; ,JU3w
public final static int SELECTION = 3; Q"(*SA+-|
public final static int SHELL = 4; ORdS|y;:
public final static int QUICK = 5; d~hN`ff
public final static int IMPROVED_QUICK = 6; Vs"1:gi&
public final static int MERGE = 7; gt>k]0
public final static int IMPROVED_MERGE = 8; WR<,[*Mv^
public final static int HEAP = 9; OZSM2~
c04;2gR
public static void sort(int[] data) { ;1[a*z<l&s
sort(data, IMPROVED_QUICK); $yoIz.?V
} &%=]lP]
private static String[] name={ *mVQN1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" s^vw]D
}; y' r I1eF
4S7#B
private static Sort[] impl=new Sort[]{ S A\_U::T
new InsertSort(), azCod1aL{
new BubbleSort(), m|by^40A(
new SelectionSort(), pl4:>4l/
new ShellSort(), +9fQ YJBA
new QuickSort(), f_m~_`m
new ImprovedQuickSort(), k x?m "a%
new MergeSort(), S}}L& _
new ImprovedMergeSort(), # 9@K
new HeapSort() lK2=[%,~
}; ZR[6-
)?$zY5
public static String toString(int algorithm){ X{BS]
return name[algorithm-1]; \r5L7y$9 h
} UzKB"Q
N'@E^ rYc
public static void sort(int[] data, int algorithm) { 6Qx[W>I
impl[algorithm-1].sort(data); &e%eIz
} a<W.}0ZY
#*~3gMI{=
public static interface Sort { =3H*%
public void sort(int[] data); $p)e.ZMgE
} \;FE@
pH/_C0e`7
public static void swap(int[] data, int i, int j) { 8bf~uHAr
int temp = data; ^U.t5jj
data = data[j]; PHh4ZFl]_I
data[j] = temp; ']__V[
} o+%($p
} C(J+tbk