[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; '[`.&-;
} +CX2W('
int i1=l; F@"Xd9q?
int i2=mid+1; SO]x^+[
for(int cur=l;cur<=r;cur++){ jWUN~#p!
if(i1==mid+1) u?Iop/b
data[cur]=temp[i2++]; +g7Iu! cA
else if(i2>r) Q%o
data[cur]=temp[i1++]; ,Xo9gn
else if(temp[i1] data[cur]=temp[i1++]; zRsT6u
else FspI[gUN,
data[cur]=temp[i2++]; J);1Tpm
} Rk2ZdNc\
} \EUc17
f!xIMIl)+
} 1PjSa4
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改进后的归并排序: AG/nX?u7)t
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package org.rut.util.algorithm.support; uhQ3
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import org.rut.util.algorithm.SortUtil; ?u'JhZ
fnL!@WF
/** |X~T</{8i
* @author treeroot V6BCW;
* @since 2006-2-2 j 7a;g7.
* @version 1.0 N#Qby4w >
*/ , $78\B^
public class ImprovedMergeSort implements SortUtil.Sort { ^^3 >R`
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private static final int THRESHOLD = 10; tG^Oj:
Ds&)0Iwf
/* `(W V pP?
* (non-Javadoc) pFGdm3pV
* ;vQ7[Pv.j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ) ;-AT^
*/ xyBe*,u
public void sort(int[] data) { qNC.|R
int[] temp=new int[data.length]; 3M+hjc.
mergeSort(data,temp,0,data.length-1); L a0H
} .F'Fk=N
n KDX=73
private void mergeSort(int[] data, int[] temp, int l, int r) { +3]@0VM26;
int i, j, k; m-*du(
int mid = (l + r) / 2; 6LNm>O
if (l == r) QIBv}hgcy
return; U/D\N0
if ((mid - l) >= THRESHOLD) A~h.,<+"
mergeSort(data, temp, l, mid); + 5sTGNG
else 8l+\Qyj
insertSort(data, l, mid - l + 1); XZZ Ml
if ((r - mid) > THRESHOLD) )I.[@#-
mergeSort(data, temp, mid + 1, r); nDui9C
else /_o1b_1U
insertSort(data, mid + 1, r - mid); z=n"cE[KtB
)-2OraUm<
for (i = l; i <= mid; i++) { i?4vdL8M
temp = data; c.KpXY
} VSmshld
for (j = 1; j <= r - mid; j++) { d[-w&[iy
temp[r - j + 1] = data[j + mid]; ldI;DoE#U1
} G?'L1g[lc
int a = temp[l]; }4A+J"M4y
int b = temp[r]; m`4Sp#m
for (i = l, j = r, k = l; k <= r; k++) { +)L 'qbCSM
if (a < b) { S[X bb=n
data[k] = temp[i++]; M2my>
a = temp; $LFzpg
} else { @"'1"$
data[k] = temp[j--]; y?CEV-3+
b = temp[j]; 19bP0y
} ,t*#o&+
} fo4j^,`
} VAsaJ`vcb
'WxcA)z0cQ
/** l_>^LFOA
* @param data 8yB
* @param l ;u!>( QQ
* @param i uJF,:}qA
*/ HMrS::
private void insertSort(int[] data, int start, int len) { _4xX}Z;
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Tx`;y|
} "eZNci
} z)]_(zZ^
} +\\,FO_
} [=S@lURzm@
o-GlBXI;
堆排序： ?P0$n 7,
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package org.rut.util.algorithm.support; yZUB8erb.
)i.p[
import org.rut.util.algorithm.SortUtil; &AZr(>
6$9n_AS
/** oizD:|
* @author treeroot )/Ee#)z*
* @since 2006-2-2 ?9OiF-:n
* @version 1.0 0Evmq3,9
*/ {-7];e
public class HeapSort implements SortUtil.Sort{ y9pQ1H<F;
/".+OpL
/* (non-Javadoc) k8 ,.~HkU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d]0fgwwGC
*/ \_De( p
public void sort(int[] data) { #wk'&XsC#z
MaxHeap h=new MaxHeap(); Z+(V'e;
h.init(data); "_}Hzpy5k
for(int i=0;i h.remove(); ~Pv4X2MO
System.arraycopy(h.queue,1,data,0,data.length); j'X]bd'
} \&Mipf7a
Nt$/JBB[$
private static class MaxHeap{ $X9-0-
4g$mz:vo
void init(int[] data){ h=EJNz>U
this.queue=new int[data.length+1]; )0yY|E\
for(int i=0;i queue[++size]=data; #gUM%$
fixUp(size); bF|j%If%
} CP]BSyim'
} f|1y?w?I
#'v7mEwt
private int size=0; q,PB;TT
?UcW@B{
private int[] queue; a%Q.8
]lXTIej`dy
public int get() { 9fzbR~s
return queue[1]; N6Vn/7I5%
} Uj(,6K8W
.NiPaUzc<
public void remove() { b U-Cd
SortUtil.swap(queue,1,size--); %a{cJ6P
fixDown(1); V\r5
} *jCXH<?R
file://fixdown ])7t!<
private void fixDown(int k) { fY}e.lD
int j; ,xn+T)2I
while ((j = k << 1) <= size) { I,_wt+O&j
if (j < size %26amp;%26amp; queue[j] j++; ?Q]&d!UCs
if (queue[k]>queue[j]) file://不用交换 zq8z#FN
break; 9V0iV5?(P
SortUtil.swap(queue,j,k); y9=/kFPRm
k = j; ;B:'8$j$
} kC!7<%(
} B+`m
private void fixUp(int k) { q\x*@KQgM
while (k > 1) { "qu%$L
int j = k >> 1; : N>5{
if (queue[j]>queue[k]) V+nqQ~pJ&
break; dScit!T"
SortUtil.swap(queue,j,k); Io|NL6[
k = j; B=(m;A#G
} `-hFk88
} VWI|`O.w
"o*F$7D!
} >wNE!Oa*B
L@_IGH
} q-KN{y/
P2_JS]>
SortUtil： Aq^1(-g
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package org.rut.util.algorithm; ([qw#!;w;
&s_[~g<
import org.rut.util.algorithm.support.BubbleSort; HfFP4#C,
import org.rut.util.algorithm.support.HeapSort; >/.-N
import org.rut.util.algorithm.support.ImprovedMergeSort; =4RnXZ[P0
import org.rut.util.algorithm.support.ImprovedQuickSort; )U6T]1
import org.rut.util.algorithm.support.InsertSort; $"!"=v%B
import org.rut.util.algorithm.support.MergeSort; *S~gF/*kP
import org.rut.util.algorithm.support.QuickSort; 17a'C
import org.rut.util.algorithm.support.SelectionSort; KA0Ui,q3
import org.rut.util.algorithm.support.ShellSort; w[^s)1
1,p7Sl^h
/** |>gya&
* @author treeroot nBgksB*A
* @since 2006-2-2 exiCy1[+
* @version 1.0 ' &^:@V
*/ od"Oq?~/t
public class SortUtil { /VgA}[%y
public final static int INSERT = 1; V&-pgxf;
public final static int BUBBLE = 2; ac6L3=u\
public final static int SELECTION = 3; %?' jyK
public final static int SHELL = 4; V)mRG`L
public final static int QUICK = 5; (%rO'X
public final static int IMPROVED_QUICK = 6; qSlC@@.>
public final static int MERGE = 7; [>A%%
public final static int IMPROVED_MERGE = 8; fLa 7d?4
public final static int HEAP = 9; P5yS`v$@
npkE[JE:
public static void sort(int[] data) { yEJ}!/
sort(data, IMPROVED_QUICK); EEEYNu/4/
} ^%@(>:)0
private static String[] name={ ZxlQyr`~a(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f]tc$`vb
}; OxqK}%=Bw
V*@pmOhz
private static Sort[] impl=new Sort[]{ :EJ+#
new InsertSort(), Psij*%I4
new BubbleSort(), h\Ck""&
new SelectionSort(), ?lKFcm
new ShellSort(), U;<07 aMj
new QuickSort(), z4D[>2*
new ImprovedQuickSort(), G1K5J`"*
new MergeSort(), Wsyq
new ImprovedMergeSort(), x{`>Il
new HeapSort() Z 7rVM
}; C:\BvPoO
~e~iCyW;S
public static String toString(int algorithm){ byR|L:L
return name[algorithm-1]; 4eMNKIsvY$
} 9+)5#!0
cs `T7?>
public static void sort(int[] data, int algorithm) { rK;F]ei
impl[algorithm-1].sort(data); -/*-e /+b
} ]mYT!(}
v)mO"\
public static interface Sort { ~4S@kYe{3K
public void sort(int[] data); v_3r8My-
} GD<xmuo
&k*sxW'
public static void swap(int[] data, int i, int j) { ;i\m:8!;
int temp = data; "q5Tw+KCfu
data = data[j]; WI/&r5rq
data[j] = temp; Lt$LXE
} P!q!+g
} |j($2.