[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; 0y2iS't
} |F9/7 z\5+
int i1=l; vA(3H/)-
int i2=mid+1; TX*s T
for(int cur=l;cur<=r;cur++){ j"}alS`-
if(i1==mid+1) -%%2Pz0I
data[cur]=temp[i2++]; j31 Sc3vG
else if(i2>r) [eG- &u
data[cur]=temp[i1++]; 5x4(5c5^
else if(temp[i1] data[cur]=temp[i1++]; @0n #Qs|E!
else GMB%A
data[cur]=temp[i2++]; lZ/Yp~2S
} wR>\5z)^
} {IqbO>|"O_
:+!hR4Z~\;
} [$-y8`~(
&ATjDbW*(
改进后的归并排序: y;sr# -L
FkKx~I:
package org.rut.util.algorithm.support; 0dXZd2oK@
WElB,a-RCp
import org.rut.util.algorithm.SortUtil; oy/#,R_n%
wQ4/eQ*
/** AGPZd9
* @author treeroot txTDuS
* @since 2006-2-2 6M259*ME
* @version 1.0 g%[lUxL
*/ OC"W=[Myl
public class ImprovedMergeSort implements SortUtil.Sort { won%(n,HT
/v=MGX@r
private static final int THRESHOLD = 10; ;Fp"]z!Qh+
Be0P[v
/* /':kJOk<[
* (non-Javadoc) )P\ec
* RUSBJsMB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AqE . TK
*/ cKF 8(
public void sort(int[] data) { ;]vE"Mx$
int[] temp=new int[data.length]; ~{RXc+
mergeSort(data,temp,0,data.length-1); o!\Vk~Vi&
} X;ijCZb3b
lN{-}f;TN
private void mergeSort(int[] data, int[] temp, int l, int r) { <E!M<!h
int i, j, k; <|s|6C
int mid = (l + r) / 2; >g8Tl`P,iN
if (l == r) kCLz@9>FQ
return; m~#98ZJ^
if ((mid - l) >= THRESHOLD) Z5_U D
mergeSort(data, temp, l, mid); fh}\#WE"
else iI&J_Y{1a_
insertSort(data, l, mid - l + 1); E3;[*ve
if ((r - mid) > THRESHOLD) hSo\
mergeSort(data, temp, mid + 1, r); ON] z-
else 'SvYZ0ot
insertSort(data, mid + 1, r - mid); "*XR'9~7
2c_#q1/Z/
for (i = l; i <= mid; i++) { 0bS\VUB(
temp = data; (lTM^3 }
} g}P.ksM
for (j = 1; j <= r - mid; j++) { Abd&p N
temp[r - j + 1] = data[j + mid]; Nt'(JAZ;
} QV4{=1A
int a = temp[l]; *:aJlvk
int b = temp[r]; Ql3hq.E
for (i = l, j = r, k = l; k <= r; k++) { 7b \HbgZ
if (a < b) { !T#~.QP4
data[k] = temp[i++]; wh[XJ_xY
a = temp; 2u/~#Rt&*
} else { : H0+}=
data[k] = temp[j--]; RU>T?2
b = temp[j]; BC9rsb
} ^CDQ75tR
} 59FAhEg
} xQ-]Iw5
CES^ c-. k
/** +F]X
* @param data q6%jCt2'
* @param l 4b,N"w{v
* @param i <A;R%\V
*/ )apqL{u:=
private void insertSort(int[] data, int start, int len) { wm=!tx\`k
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4 B"tz!
} ^} %OqP
} `lRZQ:27X
} W}50E.\#
} 5<0&y3
f-E]!\Pg
堆排序： qfd/t<?|D
ogtKj"a
package org.rut.util.algorithm.support; 3<88j&9
Mm;kB/1
import org.rut.util.algorithm.SortUtil; jSsbLa@
BA4qQCS;5
/** /59jkcA+
* @author treeroot f R$E*Jd
* @since 2006-2-2 zWb>y
* @version 1.0 dq+VW}[EO
*/ wf)T-]e
public class HeapSort implements SortUtil.Sort{ *yN+Xm8o
lfba
/* (non-Javadoc) j7IX"O%f\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q=}p P*
*/ fI9 TzpV
public void sort(int[] data) { 0>} FNRC
MaxHeap h=new MaxHeap(); 8=Xy19<;t
h.init(data); oJE~dY$Q
for(int i=0;i h.remove(); 9lbe[w@
System.arraycopy(h.queue,1,data,0,data.length); ebxpKtEC
} o?BcpWp
kq&xH;9=.
private static class MaxHeap{ 1S/KT4
F)Oe;z6
void init(int[] data){ `O4Ysk72x9
this.queue=new int[data.length+1]; FH:^<^M
for(int i=0;i queue[++size]=data; ca%s$' d
fixUp(size); e"Kg/*Ji1
} 9.:r;HG
} 8,d<&3D
DC4O@"
private int size=0; 29p`G1n
=|_:H$94
private int[] queue; MHar9)$}
}i0(^"SoXZ
public int get() { "& h;\hL
return queue[1]; :)hS-*P
} E:'TZ4Z
/Z`("X?_Kf
public void remove() { EX zA(igS
SortUtil.swap(queue,1,size--); tl5}#uJ
fixDown(1); M#ED49Dh>
} ntK#7(U'
file://fixdown ,rkY1w-
private void fixDown(int k) { pD;'uEFBQ
int j; 2 u:w
while ((j = k << 1) <= size) { ?XOl>IO
if (j < size %26amp;%26amp; queue[j] j++; 3<">1] /,
if (queue[k]>queue[j]) file://不用交换 hr9rI
break; \[u7y. b
SortUtil.swap(queue,j,k); 0*7N=
k = j; 2|]pD
} 9C9>V]
} "*E06=fiG
private void fixUp(int k) { )*6]m1
while (k > 1) { $hv o^$
int j = k >> 1; Fb8~2N"3
if (queue[j]>queue[k]) zb<YYJ]
break; BCUn[4Gp
SortUtil.swap(queue,j,k); ~\HGV+S!g}
k = j; .%Pt[VQ
} D3,9X#B=
} !Miw.UmPm
]nmVT~lBe"
} y$-;6zk\]
G!Gbg3:4e5
} Rb!V{jQ
G_m$W3 zS
SortUtil： :<Z>?x
z _A]mJ
package org.rut.util.algorithm; 9:[L WT&
X1LwIa>
import org.rut.util.algorithm.support.BubbleSort; `Ckx~'1M:
import org.rut.util.algorithm.support.HeapSort; 1^R[kaY
import org.rut.util.algorithm.support.ImprovedMergeSort; )H HBf<
import org.rut.util.algorithm.support.ImprovedQuickSort; 8Qm%T7]UFb
import org.rut.util.algorithm.support.InsertSort; Lt|'("($*
import org.rut.util.algorithm.support.MergeSort; yxz)32B?
import org.rut.util.algorithm.support.QuickSort; <.d^jgG(j
import org.rut.util.algorithm.support.SelectionSort; Ng=_#<
import org.rut.util.algorithm.support.ShellSort; jPum2U_
o=%pR|
/** aFfd!a"n
* @author treeroot ]x12_+
* @since 2006-2-2 r0xmDJ@y
* @version 1.0 <r`^iR)%
*/ 16pk4f8
public class SortUtil { * |dz.Tr
public final static int INSERT = 1; MjjN
public final static int BUBBLE = 2; #gQaNc?
public final static int SELECTION = 3; !=/wpsH
public final static int SHELL = 4; =PQMd
public final static int QUICK = 5; )fGIe rS
public final static int IMPROVED_QUICK = 6; cT&!_g#g
public final static int MERGE = 7; _{k-&I
public final static int IMPROVED_MERGE = 8; C]- !uLy
public final static int HEAP = 9; -G|?Kl
%k+G-oT5
public static void sort(int[] data) { /[<1D|f%
sort(data, IMPROVED_QUICK); ,JU3w
} @Q%9b)\\
private static String[] name={ p#QR^|7"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Vs"1:gi&
}; 9$~a&lXO5
(H[.\O-`
private static Sort[] impl=new Sort[]{ }M0GPpv
new InsertSort(), QT<\E`v
new BubbleSort(), hKjG/g:#G
new SelectionSort(), 7A=*3
new ShellSort(), jl)7Jd
new QuickSort(), qRbU@o.3
new ImprovedQuickSort(), \GP0FdpV
new MergeSort(), z&Kh$ $)[
new ImprovedMergeSort(), 6o cTQ}=
new HeapSort() S}}L& _
}; FpYeuH%
Hl*V i3bQU
public static String toString(int algorithm){ s~tZN
return name[algorithm-1]; %s;=H)8
} N'@E^ rYc
:|z.F+-/
public static void sort(int[] data, int algorithm) { t3VZjO
impl[algorithm-1].sort(data); ,bRYqU?#0
} \;FE@
ZQ)vvD<
public static interface Sort { :RG=3T[
public void sort(int[] data); 9cJ1J7y
} jiGXFM2
XlaGR2-%
public static void swap(int[] data, int i, int j) { "">{8
int temp = data; }7+`[g
data = data[j]; (/^dyG|X'
data[j] = temp; <KEVA?0>
} yLY$1#Sa
} )TtYm3,