[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; dzap]RpB
} (["u"m%
int i1=l; uhLW/?q.
int i2=mid+1; g [K8G
for(int cur=l;cur<=r;cur++){ 9w|q':<
if(i1==mid+1) 3H2'HO
data[cur]=temp[i2++]; NiF*h~q
else if(i2>r) /vU31_eZt
data[cur]=temp[i1++]; A1@a:P=
else if(temp[i1] data[cur]=temp[i1++]; C.Yz<?;S
else `W=JX2I
data[cur]=temp[i2++]; eAEVpC2
} UbXz`i
} f&J*(F*u
IB<ihk
} g>{=R|uO5
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改进后的归并排序: [o "@*kf
?6gI8K6X
package org.rut.util.algorithm.support; QS_xOQ '
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import org.rut.util.algorithm.SortUtil; 5,3h'\ "!
h&P[9:LH
/** N~_gT Jr~P
* @author treeroot mv_-|N~
* @since 2006-2-2 4i\n1RW
* @version 1.0 j jQ=
*/ S45jY=)z
public class ImprovedMergeSort implements SortUtil.Sort { ]](hwj
]H*=Z:riu
private static final int THRESHOLD = 10; XooAL0w
z'o+3zq^
/* O@VmV>m
* (non-Javadoc) r0,}f\
* F$v G=3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |b'AWI81D
*/ +VDB\n
public void sort(int[] data) { 8dNJZoV
int[] temp=new int[data.length]; |gNOv;l
mergeSort(data,temp,0,data.length-1); `CBTZG09
} }T@AoIR0t
*^]ba>
private void mergeSort(int[] data, int[] temp, int l, int r) { P^z)]K#sw
int i, j, k; 4-AmzU
int mid = (l + r) / 2; -#@;-2w
if (l == r) ZzY6M"eUXD
return; p}\!"&,^m
if ((mid - l) >= THRESHOLD) 2epL!j)Wh
mergeSort(data, temp, l, mid); uu:BN0
else =:lacK(0
insertSort(data, l, mid - l + 1); <cS1}"
if ((r - mid) > THRESHOLD) oz QL2
mergeSort(data, temp, mid + 1, r); )DW;Gc
else S!uyplYKF
insertSort(data, mid + 1, r - mid); <_}u5E)7(
!q?}[E2
for (i = l; i <= mid; i++) { _[V 6s#Wk3
temp = data; ;iWCV&>w
} &F)lvtt|
for (j = 1; j <= r - mid; j++) { *Co+UJjT
temp[r - j + 1] = data[j + mid]; o_S8fHqjt
} b^1!_1c
int a = temp[l]; _?8T'?-1
int b = temp[r]; NB[b[1 Ch
for (i = l, j = r, k = l; k <= r; k++) { EJZ2V>\_-0
if (a < b) { Ec|#i
data[k] = temp[i++]; S; >_9
a = temp; IcN|e4t^J+
} else { 7_LE2jpC,5
data[k] = temp[j--]; Lgy}Gm8u5
b = temp[j]; }6\p7n
} 3Dy.mtP
} 5,A/6b
} "{}5uth
cK""Xz&m
/** ZCa?uzeo]
* @param data BX?Si1c
* @param l z>!b
* @param i ?%?@?W>s@
*/ awUIYAgJ3
private void insertSort(int[] data, int start, int len) { 16AYB17
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /PO5z7n0J
} '{EDdlX
} )%0#XC^/X5
} fz%urbJR
} :jA~zHO
a"}?{
堆排序： w%htY.-
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package org.rut.util.algorithm.support; /D eU`rj
IP-mo!Y.
import org.rut.util.algorithm.SortUtil; i;cqK&P;]
:Q89j4,
/** z}Q54,9m
* @author treeroot H}d&>!\}F
* @since 2006-2-2 nI-\HAX
* @version 1.0 V`G]4}
*/ >zhbOkR9c
public class HeapSort implements SortUtil.Sort{ tH$Z_(5
6HyQm?c>a
/* (non-Javadoc) N=(rl#<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6g)21Mh#
*/ Bb m1&d#
public void sort(int[] data) { >n#Pq{7aF
MaxHeap h=new MaxHeap(); .Sm7na K
h.init(data); i=Y#kL~f
for(int i=0;i h.remove(); 0-7xcF@s
System.arraycopy(h.queue,1,data,0,data.length); #P1k5!u
} 3ILEc:<0J
ZT!DTb B
private static class MaxHeap{ l =#uy
A@GyKx%x$
void init(int[] data){ `6'fX[j5
this.queue=new int[data.length+1]; ^;M!u8[
for(int i=0;i queue[++size]=data; e4t'3So
fixUp(size); b}Jcj
} l%U{Unwu
} ) "'J]6
}oU0J
private int size=0; 4Xlq Ym
\:Q)Ef
private int[] queue; Y~,N,>nITu
X ZfT;!wF&
public int get() { zUWu5JI
return queue[1]; 8|gwH2st~
} @hp@*$#& 9
E`BL3+kQ
public void remove() { EP*"=_
SortUtil.swap(queue,1,size--); 7D<M\l8G
fixDown(1); 5G|(od3
} x)s`j(pYC
file://fixdown Que-
private void fixDown(int k) { YajUdpJi
int j; 0I1bY]*
while ((j = k << 1) <= size) { E`$d!7O
if (j < size %26amp;%26amp; queue[j] j++; =98@MX%P
if (queue[k]>queue[j]) file://不用交换 [+UF]m%W
break; |-bAzt
SortUtil.swap(queue,j,k); <a; <|Fm.
k = j; h",kA(+P
} =5isT
} 3x=T&X+
private void fixUp(int k) { !gu# #MrJ9
while (k > 1) { }<m9w\pA
int j = k >> 1; w\!aKeP'
if (queue[j]>queue[k]) )V7bi^r
break; _O{3bIay3!
SortUtil.swap(queue,j,k); (X;D.s
k = j; C0J/FFBQ^
} p{gJVP#l'Z
} U*b1yxt
.}C pX
} U,\3 !D0jt
Q#i[Y?$L
} DHQavHqbZ
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SortUtil： >La!O~d
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package org.rut.util.algorithm; {HHc}8
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import org.rut.util.algorithm.support.BubbleSort; ]y:2OP
import org.rut.util.algorithm.support.HeapSort; +/E`u|%|\]
import org.rut.util.algorithm.support.ImprovedMergeSort; 1%g%I8W%
import org.rut.util.algorithm.support.ImprovedQuickSort; 4CCtLHb
import org.rut.util.algorithm.support.InsertSort; MF69n,(o
import org.rut.util.algorithm.support.MergeSort; j&~`H:=E
import org.rut.util.algorithm.support.QuickSort; =f4>vo}@k
import org.rut.util.algorithm.support.SelectionSort; teIUSB[
import org.rut.util.algorithm.support.ShellSort; 8`M) r'5
2NB/&60<
/** (= #EJB1(
* @author treeroot zT4SI'r?f
* @since 2006-2-2 jOV,q%)^,:
* @version 1.0 EdR1W~JZ
*/ KPTp91
public class SortUtil { ,NB?_\$c
public final static int INSERT = 1; YBF|0A{[Y
public final static int BUBBLE = 2; 4Qwv:4La
public final static int SELECTION = 3; r2"B"%;
public final static int SHELL = 4; UaG })
public final static int QUICK = 5; d.>Zn?u4L
public final static int IMPROVED_QUICK = 6; :%!`R72
public final static int MERGE = 7; 6ZKSet8
public final static int IMPROVED_MERGE = 8; kbu.KU+
public final static int HEAP = 9; @M=xdZNyJ
B*B}eXUph
public static void sort(int[] data) { xO3-I@
sort(data, IMPROVED_QUICK); NpqK+GO
} $^~dqmE2,
private static String[] name={ _!_%Afz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" apmZ&Ab
}; +9yV'd>U
v@n0ma=
private static Sort[] impl=new Sort[]{ d>k)aIYp
new InsertSort(), !'#Y-"=ypk
new BubbleSort(), [ 'aSPA
new SelectionSort(), `?P)RS30
new ShellSort(), m}`!FaB #
new QuickSort(), nz+k ,
new ImprovedQuickSort(), nymro[@O~
new MergeSort(), N#C,q&;
new ImprovedMergeSort(), 'qoDFR\v
new HeapSort() 4+?d0
}; 8p"R4
% XvJJ
public static String toString(int algorithm){ 'fo.1
return name[algorithm-1]; ):<9j"Z;At
} 'TwvkU"
\+,%RN.
public static void sort(int[] data, int algorithm) { | 6/ # H*
impl[algorithm-1].sort(data); }:SWgPfc
} `!- w^~c
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public static interface Sort { $Jc>B#1
public void sort(int[] data); h=*eOxR"4^
} ^&8FwV]
>tGl7Ov
public static void swap(int[] data, int i, int j) { &-R(u}m-F
int temp = data; mqrV:3}
data = data[j]; 7j,u&%om
data[j] = temp; 7^bde<0
} J)I|Xot
} (?y (0%q