[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; v Y|!
} GR4?BuY,
int i1=l; H^%.=kf
int i2=mid+1; |FR3w0o
for(int cur=l;cur<=r;cur++){ )hKS0`$|
if(i1==mid+1) }OShT+xeX
data[cur]=temp[i2++]; j8,n7!G
else if(i2>r) 2s ,8R
data[cur]=temp[i1++]; P* #8ZMA<
else if(temp[i1] data[cur]=temp[i1++]; +{`yeZ9S
else w=b(X q+:
data[cur]=temp[i2++]; *<V^2z$y_
} 3yS
} ni CE\B~
JN3cg
} ``Q2P%
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改进后的归并排序: 'C+;r?1!h
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package org.rut.util.algorithm.support; cd@.zg'sYn
@]CF&: P A
import org.rut.util.algorithm.SortUtil; jk~:\8M(A
!mfJpJ
/** 8Z#j7)G
* @author treeroot @!tVr3;N$
* @since 2006-2-2 $\Lyi#<
* @version 1.0 LX+5|u
*/ ;-mdi/*g
public class ImprovedMergeSort implements SortUtil.Sort { |VH!)vD
!|wzf+V
private static final int THRESHOLD = 10; eOlKbJU
(il0M=M
/* tV;%J4E'
* (non-Javadoc) HaNboYW_K
* :Waox"#=g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "&YYO#YO
*/ 8|1^|B(l
public void sort(int[] data) { Eh8Pwt7C@
int[] temp=new int[data.length]; 2h~-
mergeSort(data,temp,0,data.length-1); jh ez
} .q`{Dgc~
N"5fmY<
private void mergeSort(int[] data, int[] temp, int l, int r) { B~WtZ-%%E
int i, j, k; Dma.r
int mid = (l + r) / 2; `\$8`Zb;
if (l == r) A/*%J74v
return; %"3 )TN4
if ((mid - l) >= THRESHOLD) ~.tvrxg
mergeSort(data, temp, l, mid); UV7%4xM5v
else "u^EleE!
insertSort(data, l, mid - l + 1); m$Y :0_^-
if ((r - mid) > THRESHOLD) =J'P.
mergeSort(data, temp, mid + 1, r); Qu*1g(el!o
else _cI_#
insertSort(data, mid + 1, r - mid); FY0%XW
0OZMlt%z
for (i = l; i <= mid; i++) { LC69td&
temp = data; w:=V@-S8
} (-yl|NFBw
for (j = 1; j <= r - mid; j++) { [W,|kDK
temp[r - j + 1] = data[j + mid]; 3 pWM~(#>-
} H-t|i
int a = temp[l]; (yrh=6=z
int b = temp[r]; :>3=gex@^0
for (i = l, j = r, k = l; k <= r; k++) { dz9Y}\2tf
if (a < b) { g$37;d3Tx
data[k] = temp[i++]; GY!C|7kN
a = temp; h^|5|l
} else { Wsz0yHD[`
data[k] = temp[j--]; .jg0a
b = temp[j]; j.?:Gaab?#
} w_-+o^
} 1TJ0D_,
} m9$:9yRm
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/** cSD{$B:
* @param data a=]Wzlz
* @param l LgqGVh3\s
* @param i 3!9Z=-tD
*/ ^JeMuU
private void insertSort(int[] data, int start, int len) { h BMH)aU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); F3E[wdT
} AHh#Fx+K
} a' FN 3
} n2-0.Er
} Pe7e?79
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堆排序： }7/e8 O2
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package org.rut.util.algorithm.support; ?bX
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import org.rut.util.algorithm.SortUtil; m\0cE1fir
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/** rGwIcx(%
* @author treeroot >l1r,/\\
* @since 2006-2-2 x"B'zP
* @version 1.0 Utl t<
*/ loOOmHhJ&
public class HeapSort implements SortUtil.Sort{ M?&zY "c
Buc_9Kzw<+
/* (non-Javadoc) 19u =W(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UPh=+s #Q
*/ D,;\F,p
public void sort(int[] data) { +++pI.>(*Q
MaxHeap h=new MaxHeap(); 649 !=
h.init(data); 4SVW/Zl.?
for(int i=0;i h.remove(); Di(9]:+
System.arraycopy(h.queue,1,data,0,data.length); :b#%C pR
} i.a _C'<$
,Qc.;4s-
private static class MaxHeap{ 7XAvd-
IM(u<c$
void init(int[] data){ e<+<lj"
this.queue=new int[data.length+1]; !c(QSf502
for(int i=0;i queue[++size]=data; d,#.E@Po
fixUp(size); b5`KB75sbo
} FvImX
} W4(?HTWZ
)m#']c:rg
private int size=0; fj']?a!m
?T'][q
private int[] queue; 2W$lQ;iO
QApyP CH
public int get() { LsTffIP
return queue[1]; EQ >t[ &
} !C&%T]
Z5)eREi=
public void remove() { R 1zC.m
SortUtil.swap(queue,1,size--); .[pUuVq]
fixDown(1); F'W> 8
} Hcv u7uD
file://fixdown d0UZ+ RR#
private void fixDown(int k) { knHv?#
int j; [#b2%G1
while ((j = k << 1) <= size) { v<h;Di@
if (j < size %26amp;%26amp; queue[j] j++; W'/>et
if (queue[k]>queue[j]) file://不用交换 L]bVN)JU
break; <0j{ $.
SortUtil.swap(queue,j,k); Ol+Kp!ocY
k = j; pM$ @m]
} @p!Q1-]=
} x mo&![P
private void fixUp(int k) { ZwJciT!_~
while (k > 1) { sBW3{uK
int j = k >> 1; ;;#nV$
if (queue[j]>queue[k]) o0Gx%99'
break; ;sQbn|=e"
SortUtil.swap(queue,j,k); @EZ>f5IO+
k = j; C3"&sdLb$
} oXal
} rxE&fjW
0D3OE.$0
} tbur$00
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} VTw/_Hf2p
~ =.CTm]vf
SortUtil： $$gtZ{ukQ
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package org.rut.util.algorithm; hPO>,j^
P;U@y"s
import org.rut.util.algorithm.support.BubbleSort; >4)g4~'n!
import org.rut.util.algorithm.support.HeapSort; Rt4di^v
import org.rut.util.algorithm.support.ImprovedMergeSort; Jt=>-Spj
import org.rut.util.algorithm.support.ImprovedQuickSort; Bymny>.M
import org.rut.util.algorithm.support.InsertSort; WYO\'W
import org.rut.util.algorithm.support.MergeSort; OgMI
import org.rut.util.algorithm.support.QuickSort; +VOb
import org.rut.util.algorithm.support.SelectionSort; w-rOecwFvu
import org.rut.util.algorithm.support.ShellSort; rg)h5G
#+G`!<7/@f
/** }~zO+Wf2
* @author treeroot Uf2:gLrF
* @since 2006-2-2 c E76L%O
* @version 1.0 kK?zVH-!
*/ j#igu#MB*
public class SortUtil { sR79 K1*j
public final static int INSERT = 1; 6VR[)T%
public final static int BUBBLE = 2; u4"r>e6_B
public final static int SELECTION = 3; P|}\/}{`
public final static int SHELL = 4; E+{5-[Zc*$
public final static int QUICK = 5; *zQOJsg"e
public final static int IMPROVED_QUICK = 6; bXvbddu)}
public final static int MERGE = 7; ,}7_[b)&V
public final static int IMPROVED_MERGE = 8; 1uM/2sX
public final static int HEAP = 9; ua#K>sur.
`]>on`n?
public static void sort(int[] data) { VO-784I
sort(data, IMPROVED_QUICK); qZsnd7o{l.
} VkXn8J
private static String[] name={ ~CFMIQ et
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Bz:0L1@,4a
}; (j N]OE^
Wem?{kx0
private static Sort[] impl=new Sort[]{ 3+ asP&n
new InsertSort(), {3 o%d:
new BubbleSort(), H m8y]>$
new SelectionSort(), HD00J]y_
new ShellSort(), 4*8&[b
new QuickSort(), dq1TRFu
new ImprovedQuickSort(), j+0.=#{??
new MergeSort(), ,%8$D-4#_
new ImprovedMergeSort(), fI}c 71b`
new HeapSort() %!wq:~B1
}; <Kp+&(l,l
?`i|"y#
public static String toString(int algorithm){ a7 )@BzF#
return name[algorithm-1]; k~|ZO/X@l%
} +$~8)95<B
ZgBckb
public static void sort(int[] data, int algorithm) { G5umeqYC
impl[algorithm-1].sort(data); n)CH^WHL&
} 88YC0!Ni
_LsYMUe
public static interface Sort { BvJ\x)
public void sort(int[] data); ^0eO\wc?O
} ybYXD?
am(#Fa
public static void swap(int[] data, int i, int j) { J/[7d?hI/
int temp = data; .b~OMTHuvM
data = data[j]; Zh? V,39
data[j] = temp; .h6Y< E
} wRi~Yb?
} [oJ& J>U'