[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; w(-n1oSo
} mY( _-[W
int i1=l; =1qkoc~
int i2=mid+1; '3->G/Pu
for(int cur=l;cur<=r;cur++){ Hyg?as>}u
if(i1==mid+1) Oa .%n9ec
data[cur]=temp[i2++]; RI;RE/Z
else if(i2>r) u{,^#I}
data[cur]=temp[i1++]; ^S|^1
else if(temp[i1] data[cur]=temp[i1++]; H!u:P?j@\
else ) b8*>k
data[cur]=temp[i2++]; ?_r"Fg;"
} iz(+(M
} .Dmvgi]
Dn?L
} c[$oR,2b13
=I1@O9}+i
改进后的归并排序: ='j
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package org.rut.util.algorithm.support; `39U I7
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import org.rut.util.algorithm.SortUtil; o<4LL7$A!
C*!_. <b
/** ^-_!:7TH]
* @author treeroot Q~kwUZ
* @since 2006-2-2 2srz) xEe
* @version 1.0 );[`rXH_
*/ &.,OvVAo
public class ImprovedMergeSort implements SortUtil.Sort { PhS"tOGtX
?*;zS%93U9
private static final int THRESHOLD = 10; Yy}aQF#M
Ft}tIP7
/* N\?iU8w=
* (non-Javadoc) ?8 F7BS4oQ
* 2i)y'+s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2,\uY}4
*/ rSk $]E]Z
public void sort(int[] data) { ?cvv!2B]T
int[] temp=new int[data.length]; 9maw+c!~
mergeSort(data,temp,0,data.length-1); a#1X)ot
} S]>_o"|HV
^cNP?7g7
private void mergeSort(int[] data, int[] temp, int l, int r) { u+'=EGl
int i, j, k; CHz(wn
int mid = (l + r) / 2; K02./ut-
if (l == r) [Dhc9
return; /dqKFxB1
if ((mid - l) >= THRESHOLD) 0)B+:
mergeSort(data, temp, l, mid); 4)ISRR
else +CkK4<dF
insertSort(data, l, mid - l + 1); Du/s
if ((r - mid) > THRESHOLD) Wac8x%J
mergeSort(data, temp, mid + 1, r); :PLsA3[}
else + |,CIl+
insertSort(data, mid + 1, r - mid); H{BjxZ~)
rcK*",>
for (i = l; i <= mid; i++) { w-2]69$k
temp = data; "`S61m_
} 38#(ruv
for (j = 1; j <= r - mid; j++) { 7mN?;X33
temp[r - j + 1] = data[j + mid]; Rq*m x<HDX
} S4_Y^
int a = temp[l]; DXUI/C f
int b = temp[r]; fTeo,N
for (i = l, j = r, k = l; k <= r; k++) { 4q[r KNl
if (a < b) { nRGH58
data[k] = temp[i++]; ,]d}pJ}PX`
a = temp; A1C@'9R*
} else { YS]RG/'
data[k] = temp[j--]; }S&{ &gh
b = temp[j]; l^_X?L@
} V)]&UbEL|
} yE7pCgXt
} [B4?Z-K%
>M!>Hl/
/** @dXf_2Tv=
* @param data ':,LZ A8A
* @param l m$^7sFD$
* @param i }vi%pfrB
*/ 2Zm*f2$xM
private void insertSort(int[] data, int start, int len) { +)|2$$m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OjCT%6hy;
} *0U(nCT&m
} yZ 9 *oDs
} J kA~Ol
} ]-6 G'i?
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堆排序： \yxr@z1_b
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package org.rut.util.algorithm.support; eAqQ~)8^
@6gz) p
import org.rut.util.algorithm.SortUtil; eQc!@*:8U
N>~*Jp2;
/** 56)B/0=
* @author treeroot ]D%[GO//!
* @since 2006-2-2 +LyhF2
* @version 1.0 wOsr#t7
*/ `A'*x]l
public class HeapSort implements SortUtil.Sort{ s:_5p`w>
$^l=#tV
/* (non-Javadoc) -L[K1;Xv"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KGJB.<Be
*/ s?2;u p*D
public void sort(int[] data) { nQ+{1 C
MaxHeap h=new MaxHeap(); F-X>|oK>z
h.init(data); N@VD-}E
for(int i=0;i h.remove(); E|6|m8
System.arraycopy(h.queue,1,data,0,data.length); ux }DWrR
} LU]~d<i99
ZTun{Dw{
private static class MaxHeap{ ZDb`]c4(
]gEfm~YV
void init(int[] data){ K{iYp4pU
this.queue=new int[data.length+1]; NubD2
for(int i=0;i queue[++size]=data; s.~SV"
fixUp(size); O+yR+aXr'8
} ,Q:dAe[ZsX
} GZ e )QH
J@5 OZFMZ
private int size=0; )CB?gW
FlZ]R
private int[] queue; tEeMl =u
9W8Dp?:
public int get() { lN&GfPP6
return queue[1]; VMHY.Rf
} }a`LOBne
g %Am[fb
public void remove() { y5#_@
SortUtil.swap(queue,1,size--); U".-C`4v
fixDown(1); HqgH\
} @Q^;qMy
file://fixdown ?( '%QfT
private void fixDown(int k) { ?{2-,M0
int j; gu/Yc`S[
while ((j = k << 1) <= size) { k (R4-"@
if (j < size %26amp;%26amp; queue[j] j++; 1Y`MJ\9
if (queue[k]>queue[j]) file://不用交换 pg<>Ow5,~l
break; -"<f(
SortUtil.swap(queue,j,k); G pd:k
k = j; $X?V_K;9/
} Nt'5}
} n>Ei1
private void fixUp(int k) { NplSkv
while (k > 1) { BpCSf.zZ
int j = k >> 1; n&fV3[m`2
if (queue[j]>queue[k]) 7jPmI
break; )t4C*+9<U
SortUtil.swap(queue,j,k); H1]\B:
k = j; ra&C|"~E
} pI`Ke"
} *G^]j )/
x#^kv)
} e=_hfOUC
ZKvh]
} _=MWt_A '3
l.BNe)1!22
SortUtil： B_S3}g<~
8n)Q^z+ K
package org.rut.util.algorithm; D6t]E)FH
9 2EMDKJ
import org.rut.util.algorithm.support.BubbleSort; b$`O|S
import org.rut.util.algorithm.support.HeapSort; &<V~s/n=6?
import org.rut.util.algorithm.support.ImprovedMergeSort; Ir'f((8:
import org.rut.util.algorithm.support.ImprovedQuickSort; 2XtQ"`)
import org.rut.util.algorithm.support.InsertSort; Go|65Z\`7M
import org.rut.util.algorithm.support.MergeSort; hG^23FiN
import org.rut.util.algorithm.support.QuickSort; Jj " {r{
import org.rut.util.algorithm.support.SelectionSort; tTgW^&B
import org.rut.util.algorithm.support.ShellSort; zYL^e @
.kIf1-(<U
/** %vXQ Sz
* @author treeroot rx/6x(3
* @since 2006-2-2 UL%ihWq
* @version 1.0 #"_MY-
*/ je-s%kNlJ
public class SortUtil { Q)>'fZ)
public final static int INSERT = 1; :+Kesa:E
public final static int BUBBLE = 2; BpT&vbY
public final static int SELECTION = 3; jq)|Uq'6
public final static int SHELL = 4; vknFtpx
public final static int QUICK = 5; $b} +5
public final static int IMPROVED_QUICK = 6; B}X#oA
public final static int MERGE = 7; 7W"menw
public final static int IMPROVED_MERGE = 8; B*IDx`^Y
public final static int HEAP = 9; ;>N ~,Q
w C"%b#(}
public static void sort(int[] data) { }^7V^W
sort(data, IMPROVED_QUICK); 27:x5g?
} $nn5;11@gY
private static String[] name={ <Tf;p8#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" (rn x56I$
}; -e>)yM `i
V-jL`(JF%
private static Sort[] impl=new Sort[]{ hT"K}d;X
new InsertSort(), ;kBies>V
new BubbleSort(), 8BDL{?Mu
new SelectionSort(), m12B:f
new ShellSort(), m{c#cR
new QuickSort(), tpONSRY
new ImprovedQuickSort(), VKz<7K\/
new MergeSort(), +`-a*U94
new ImprovedMergeSort(), 'OCo1|iK~
new HeapSort() @U@yIv
}; <>_WdAOuD
Bq_P?Q+\
public static String toString(int algorithm){ Z;D3lbqE
return name[algorithm-1]; -^v}T/Kl#
} p)xI5,b$9
j*d~h$[k
public static void sort(int[] data, int algorithm) { uFZB8+
impl[algorithm-1].sort(data); EG4bFmcs
} /}_c7+//
3ohcHQ/a
public static interface Sort { ^1=|(Z/
public void sort(int[] data); shIi,!bZ
} N'P,QiR,z<
-oBas4J
public static void swap(int[] data, int i, int j) { IQe[ CcM
int temp = data; 'hw@l>1\9
data = data[j]; :iB%JY Ad
data[j] = temp; z/k~+-6O
} _PUm Pom.
} &xroms"S=