[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; )qv2)a!H
} Tg0CE60"
int i1=l; yrnv!moc%t
int i2=mid+1; `rlk|&T1
for(int cur=l;cur<=r;cur++){ vy[C'a
if(i1==mid+1) A|L'ih/
data[cur]=temp[i2++]; iPvuz7j=h
else if(i2>r) (,B#t7ka
data[cur]=temp[i1++]; f"dSr
else if(temp[i1] data[cur]=temp[i1++]; s3:9$.tiR[
else O(c@PJem
data[cur]=temp[i2++]; $5NKFJc
} py @( <
} l(!/Q|Q|
E"6X|I n
} :Wc_Utt
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改进后的归并排序: :QPf~\w?
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package org.rut.util.algorithm.support; MLr-, "gs
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import org.rut.util.algorithm.SortUtil; `XJm=/f
"j^MB)YD
/** ]A^4}CK^<
* @author treeroot "hQgLG
* @since 2006-2-2 #$E)b:xj
* @version 1.0 jo9gCP.
*/ lyv4fP
public class ImprovedMergeSort implements SortUtil.Sort { >P=Q #;v
rzUlO5?R=
private static final int THRESHOLD = 10; P6\6?am
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/* !Ms[eB
* (non-Javadoc) yCP4r6X0
* /TV=$gB`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Dvc&RG
*/ e2cP *J
public void sort(int[] data) { 6;iJ*2f5V
int[] temp=new int[data.length]; `XKVr
mergeSort(data,temp,0,data.length-1); x#*QfE/E(@
} iOCqE 5d3
]PR#W_&q
private void mergeSort(int[] data, int[] temp, int l, int r) { %\Wf^6Y^
int i, j, k; tU:EN;H
int mid = (l + r) / 2; ,R2U`EO;
if (l == r) }ptq )p
return; a`!@+6yC
if ((mid - l) >= THRESHOLD) ^5;`-Ky
mergeSort(data, temp, l, mid); 2VoKr)
else _>yoX
insertSort(data, l, mid - l + 1); Uz dc
if ((r - mid) > THRESHOLD) aG%,cQ1
mergeSort(data, temp, mid + 1, r); t9cl"F=
else =0
insertSort(data, mid + 1, r - mid); ~ G6"3"
.iHn5SGA
for (i = l; i <= mid; i++) { @t*t+Vqw
temp = data; j Ux z
} +>\id~c(
for (j = 1; j <= r - mid; j++) { MTOy8 Im
temp[r - j + 1] = data[j + mid]; 1:M@&1LYp
} 2%u;$pj
int a = temp[l]; V[nQQxWp=
int b = temp[r]; i+{yMol1
for (i = l, j = r, k = l; k <= r; k++) { F?-R$<Cn2~
if (a < b) { aZ|=(]
data[k] = temp[i++]; 5ZY<JA3
a = temp; ye}p~&
} else { >e,mg8u6$
data[k] = temp[j--]; $I9qgDJ)
b = temp[j]; O"G >wv
} rXfy!rD_P_
} p-SJ6Gg 9
} ]#2Y e7+
alq%H}FF
/** vVl; |
* @param data m P'^%TE
* @param l hrGH}CU"
* @param i 36.N>G,
*/ JW.=T)
private void insertSort(int[] data, int start, int len) { 9f+>ix,ek*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C3NdE_E
} \ZU1Jb1c
} umi5Wb<
} 10!wqyj&
} 'R`tLN
w@JKl5
堆排序： )WT>@
#jA[9gWI
package org.rut.util.algorithm.support; b2b?hA'k
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import org.rut.util.algorithm.SortUtil; Mi'8 ~J
./Q,
/** 5%sE]Y#
* @author treeroot ^j-3av=
* @since 2006-2-2 4vBL6!z:Z
* @version 1.0 H"ZZ.^"5FV
*/ yE[#ze
public class HeapSort implements SortUtil.Sort{ otggN:^Qw
P) 3mX.(}
/* (non-Javadoc) OO[F E3F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^&y$Wd]6
*/ Hx,0zS%>
public void sort(int[] data) { 2^i(gaXUQ
MaxHeap h=new MaxHeap(); p+)YTzzc
h.init(data); 9]q:[zm^
for(int i=0;i h.remove(); _6ay-u
System.arraycopy(h.queue,1,data,0,data.length); |2{wG4
} 8Q_SRwN
\=_{na_
private static class MaxHeap{ o=0]el^A
giz7{Ai
void init(int[] data){ " Hd|7F'u=
this.queue=new int[data.length+1]; pAT7)Ch
for(int i=0;i queue[++size]=data; +TXX$)3%
fixUp(size); q$=#A7H>3)
} OpHsob~
} 55z]&5N
aTt12Sc
private int size=0; [sW3l:^
P Y
private int[] queue; Y=Kc'x[,Zj
Oeok;:
public int get() { Ftr5k^!
return queue[1]; pS:4CNI{
} 9gmW&{6q
mGK|ihYu
public void remove() { .4E&/w+
SortUtil.swap(queue,1,size--); b}"N`,0dO
fixDown(1); T \_]^]>
} 1]p ZrBh"E
file://fixdown <_-hRbS
private void fixDown(int k) { H5Io{B%=
int j; ,=[?yJy
while ((j = k << 1) <= size) { ye,>A.
if (j < size %26amp;%26amp; queue[j] j++; ~GZY5HF
if (queue[k]>queue[j]) file://不用交换 ++^l]8
break; :0Rx#%u}#
SortUtil.swap(queue,j,k); 0E3[N:s
k = j; VT\F]Oa#
} sG92XJ
} )!P)U(*v
private void fixUp(int k) { G6$kv2(k`@
while (k > 1) { ~=uWD&5B4
int j = k >> 1; v]B3m
if (queue[j]>queue[k]) ?j"KV_
break; 8; 0A g
SortUtil.swap(queue,j,k); {?:X8&Sf
k = j; X\bOz[\
} sT}.v*
} vH :LQ!2
tp63@L|Q
} ?#}N1k\S
*%%g{ 3$
} BRgXr
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SortUtil： Brf5dT49
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package org.rut.util.algorithm; CxwoBuG=?
{xXsBh Y
import org.rut.util.algorithm.support.BubbleSort; W*Zkc:{eB
import org.rut.util.algorithm.support.HeapSort; "@iK' c^
import org.rut.util.algorithm.support.ImprovedMergeSort; #h` V>;
import org.rut.util.algorithm.support.ImprovedQuickSort; n*[XR`r}
import org.rut.util.algorithm.support.InsertSort; n\*!CXc
import org.rut.util.algorithm.support.MergeSort; fF7bBE)L/|
import org.rut.util.algorithm.support.QuickSort; S4Y&
import org.rut.util.algorithm.support.SelectionSort; *U&0<{|T
import org.rut.util.algorithm.support.ShellSort; -p]1=@A<}
ywGd>@
/** 5z7U1:
* @author treeroot gOSJM1Mr3
* @since 2006-2-2 ME46V6[LX]
* @version 1.0 =P't(<
*/ 7z JRJ*NB
public class SortUtil { ^c-
public final static int INSERT = 1; (l^3Z3zf&
public final static int BUBBLE = 2; ,,%i;
public final static int SELECTION = 3; gQ Fjr_IS#
public final static int SHELL = 4; 7%Gwc?[x
public final static int QUICK = 5; J??-j
public final static int IMPROVED_QUICK = 6; g jDh?I
public final static int MERGE = 7; u0|8Tgf
public final static int IMPROVED_MERGE = 8; }wr{W:j
public final static int HEAP = 9; g{OwuAC_
z> Rsi
public static void sort(int[] data) { j*so9M6|c
sort(data, IMPROVED_QUICK); 7puFz4+f
} ObVGV
private static String[] name={ CZud& <
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7}f}$1
}; 2Rw&C6("w
sFT.Oxg<
private static Sort[] impl=new Sort[]{ \<JSkr[h!"
new InsertSort(), x@P y>f2
new BubbleSort(), $PTP/^
new SelectionSort(), m0ER@BXRn
new ShellSort(), {o_X`rgrL
new QuickSort(), _=_Px@<Q
new ImprovedQuickSort(), ,k )w6)
new MergeSort(), U}yW<#$+
new ImprovedMergeSort(), I`-8Air5f
new HeapSort() \F1_lq;K
}; xST8|H
JD)(oK%C
public static String toString(int algorithm){ PF)jdcX
return name[algorithm-1]; [I'0,y
} Tl(^
7Ri46Tkt
public static void sort(int[] data, int algorithm) { "& ])lz[u
impl[algorithm-1].sort(data); CR8/Ke
} 1"zDin!A
_4"mAPt
public static interface Sort { }Lc-7[/
public void sort(int[] data); nzd2zY>V
} Wk~WOzr}^
K0-ypU*P
public static void swap(int[] data, int i, int j) { HePUWL'
int temp = data; >80;8\
data = data[j]; HW3 }uP\c
data[j] = temp; )j9SGLo
} 77C'*tt1]
} o3Yb7h9