[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; b.QL\$a &
} <O4W!UVg
int i1=l; Dj'+,{7,u
int i2=mid+1; B=|m._OL]n
for(int cur=l;cur<=r;cur++){ U\(T<WX,
if(i1==mid+1) 3EA`]&d>
data[cur]=temp[i2++]; h8:5[;e
else if(i2>r) EOG&Xa
data[cur]=temp[i1++]; k.W1bF9n6
else if(temp[i1] data[cur]=temp[i1++]; II{"6YI>
else Df=Xbf>jt9
data[cur]=temp[i2++]; HA3d9`
} #BhcW"@
} U] av{}U
T;{"lp.
} G>S3?jGk
)\QPUdOvx
改进后的归并排序: 5k`Df/
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package org.rut.util.algorithm.support; 5.F/>?<
~iU@ns|g\
import org.rut.util.algorithm.SortUtil; M+Eg{^ q`
?d@zTAI
/** ""x>-j4
* @author treeroot 6:AZZF1
* @since 2006-2-2 {hBnEj^@
* @version 1.0 l vfplA
*/ f<*-;
public class ImprovedMergeSort implements SortUtil.Sort { xGt>X77
8RU91H8fE
private static final int THRESHOLD = 10; 7>xfQ
}/M`G]wT#
/* U&u~i 3
* (non-Javadoc) :KBy(}V
* (dAE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rz.`$
*/ ;!pJ%p0Sc
public void sort(int[] data) { uX~YDy
int[] temp=new int[data.length]; pU[5f5_
mergeSort(data,temp,0,data.length-1); oU)3du
} l'kVi
KfV&7yi
private void mergeSort(int[] data, int[] temp, int l, int r) { =|_k a8{?
int i, j, k; M6"a w6
int mid = (l + r) / 2; {{ +8oRzY
if (l == r) dS;Ui]/J
return; \>c1Z5H>
if ((mid - l) >= THRESHOLD) TS@U0Ror
mergeSort(data, temp, l, mid); iKAqM{(
else betTAbF
insertSort(data, l, mid - l + 1); !X+}W[Ic^
if ((r - mid) > THRESHOLD) 3'6by!N,d
mergeSort(data, temp, mid + 1, r); tiTh7qYi9
else /9SNXjfbt
insertSort(data, mid + 1, r - mid); Mb(hdS90
2R~[B]2"r
for (i = l; i <= mid; i++) { (n4Uc308
temp = data; &f<Ltdw
} &-p!Lg&D
for (j = 1; j <= r - mid; j++) { `l+9g"q
temp[r - j + 1] = data[j + mid]; .'=-@W*
} \Vl)q>K_h
int a = temp[l]; 17yg ~
int b = temp[r]; ew*;mQd
for (i = l, j = r, k = l; k <= r; k++) { BD&AtOj[,
if (a < b) { Fz^5cxmw
data[k] = temp[i++]; V5S6?V\
a = temp; !b'!7p
} else { (]sk3 A
data[k] = temp[j--]; G'WbXX
b = temp[j]; m";?B1%x
} 'Jl3%axR
} 15"[MX A
} D<(VP{,G
JJu}Ed_
/** (zIF2qY
* @param data e)A{ {wD/
* @param l s5u
* @param i 0l~z0pvT
*/ i z dJ,8
private void insertSort(int[] data, int start, int len) { ]vq=~x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); '2v$xOh!y
} (V#*}eGy
} -ei+r#
} [<IJ{yfx
} L?r\J8Ch<
p@%H. 5&&
堆排序： Y$nI9
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package org.rut.util.algorithm.support; e\ O&Xe
`;z;=A*
import org.rut.util.algorithm.SortUtil; 4B'-tV
=xRxr@
/** ?oQAxb&
* @author treeroot [OQ+&\
* @since 2006-2-2 mM-7 jz
* @version 1.0 T*zy^we
*/ yrV]I(Xe
public class HeapSort implements SortUtil.Sort{ 7:X@lmBz=
f}{Oj-:"CC
/* (non-Javadoc) |5me }!C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5g4xhYl70n
*/ <O9.GHV1v
public void sort(int[] data) { w"A%@<V3Ec
MaxHeap h=new MaxHeap(); `(pe#Xxn
h.init(data); @rxfOc0J#
for(int i=0;i h.remove(); r9$7P?zm
System.arraycopy(h.queue,1,data,0,data.length); 1zc-$B`t
} m'5rzZP
<R8!fc{`
private static class MaxHeap{ lBfG#\rdW~
J]qx4c
void init(int[] data){ `sJv?
this.queue=new int[data.length+1]; n^k Uu2g|
for(int i=0;i queue[++size]=data; W0KSLxM
fixUp(size); >@L^^-r
} %y R~dt'
} ^li(q]g1!
~:):.5o
private int size=0; &-4SA j
=\)qUs\z
private int[] queue; 7G9o%!D5
o]m56
public int get() { BV6 U -
return queue[1]; LKI2R_|n
} M;1B}x@
Ub<^;Du5
public void remove() { <!I^xo[
SortUtil.swap(queue,1,size--); dJUI.!hv;
fixDown(1); `&qeSEs\
} ?\Lf=[
file://fixdown b'TkYa^
private void fixDown(int k) { 5.FAuzz
int j; {^SHIL
while ((j = k << 1) <= size) { eHHqm^1z
if (j < size %26amp;%26amp; queue[j] j++; (vr v-4
if (queue[k]>queue[j]) file://不用交换 6;hZHe'W
break; +B-;.]L T
SortUtil.swap(queue,j,k); XyytO;XM-
k = j; G~`nLC^Y
} 1JO@G3,
} s14;\
private void fixUp(int k) { XyE%<]
while (k > 1) { qjVhBu7A
int j = k >> 1; iV8O<en&i
if (queue[j]>queue[k]) <[<]+r&*
break; pPtw(5bH
SortUtil.swap(queue,j,k); +*P;Vb6D
k = j; yB,{:kq7D
} :gacP?
} /2AeJH\-
Q>[GD(8k
} %2`geN<
wNhtw'E8
} zHW}A `Rz
,.PmH.zjmR
SortUtil： ?ZlN$h^
CAV Q[r5y
package org.rut.util.algorithm; *"K7<S[
'Z ,T,zW
import org.rut.util.algorithm.support.BubbleSort; g;PZ$|%&s>
import org.rut.util.algorithm.support.HeapSort; `]\:%+-
import org.rut.util.algorithm.support.ImprovedMergeSort; I85bzzZB
import org.rut.util.algorithm.support.ImprovedQuickSort; R.B3
import org.rut.util.algorithm.support.InsertSort; 6qp' _?
import org.rut.util.algorithm.support.MergeSort; NlV,] $L1T
import org.rut.util.algorithm.support.QuickSort; F~${L+^
import org.rut.util.algorithm.support.SelectionSort; \)mV2r!%
import org.rut.util.algorithm.support.ShellSort; $09PZBF,i
/J`ZO$
/** 8lcB.M
* @author treeroot '*,P33h9<!
* @since 2006-2-2 -p2 =?a
* @version 1.0 f+j-M|A
*/ (DrDWD4_
public class SortUtil { ~q05xy8
public final static int INSERT = 1; /E0/)@pDq
public final static int BUBBLE = 2; )#_:5^1
public final static int SELECTION = 3; qLh[BR
public final static int SHELL = 4; (L7@ez
public final static int QUICK = 5; T|FF&|Pk
public final static int IMPROVED_QUICK = 6; E]IPag8C
public final static int MERGE = 7; CPS1b
public final static int IMPROVED_MERGE = 8; t+`>zux5(T
public final static int HEAP = 9; r>gU*bs(
(jB_uMuS
public static void sort(int[] data) { -Rz%<`
sort(data, IMPROVED_QUICK); biw2f~V
} g_F-PT>($
private static String[] name={ 0-a[[hL?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 3a\.s9A"
}; zQhc V
h`:f
private static Sort[] impl=new Sort[]{ I&Y9
new InsertSort(), e#jkp'
new BubbleSort(), FfR%@ V'
new SelectionSort(), H`028^CH$
new ShellSort(), )>~d`_$dt
new QuickSort(), ( [m[<
new ImprovedQuickSort(), = 7TK&
new MergeSort(), Fi!XaO
new ImprovedMergeSort(), ss>p
new HeapSort() |g}~7*+i
}; #X?#v7i",D
C~#ndl Ij
public static String toString(int algorithm){ :UdH}u!Ek
return name[algorithm-1]; SF2<
} cKbsf^R[e
eLc@w<yB
public static void sort(int[] data, int algorithm) { /i
impl[algorithm-1].sort(data); zP$Ef7bB
} ,Xt!dT-
zBd)E21H
public static interface Sort { _onEXrM
public void sort(int[] data); ]t|-
} xIh,UW#
T nG=X:+=
public static void swap(int[] data, int i, int j) { KeiPo KhZi
int temp = data; cw)'vAE
data = data[j]; ubvXpK:.
data[j] = temp; C-6m[W8S
} 4RXF.kJ3=
} 5? rR'0