[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; @JdZ5Q
} EJ2yO@5O
int i1=l; <FZ@Q[RP
int i2=mid+1; 3_A *$
for(int cur=l;cur<=r;cur++){ hMtf.3S7c
if(i1==mid+1) 86nN"!{l:
data[cur]=temp[i2++]; arf8xqR-U]
else if(i2>r) v%Wx4v@%SE
data[cur]=temp[i1++]; ,AT[@
else if(temp[i1] data[cur]=temp[i1++]; (p%>j0<
else \TU3rk&X
data[cur]=temp[i2++]; y(K" -?
} Z0l+1iMx
} K_&4D'
Mw9 \EhA
} V')0 Mr
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改进后的归并排序: 4`,j=3
Dc)dE2
package org.rut.util.algorithm.support; 7`u$
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import org.rut.util.algorithm.SortUtil; 2;w*oop,O
5h;+Ky!I
/** ->N8#XH2=
* @author treeroot zXRlo]
* @since 2006-2-2 /hO1QT}xd
* @version 1.0 orb_"Qw
*/ + nF'a(
public class ImprovedMergeSort implements SortUtil.Sort { ~K@'+5Pc
2WG>, 4W2
private static final int THRESHOLD = 10; .YuJJJv
"Wx]RN:
/* NIw\}[-Z0E
* (non-Javadoc) 5xL~`-IA&v
* 0Lb4'25.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jec'`,Y
*/ ({o'd=nO
public void sort(int[] data) { l#n,Fg3
int[] temp=new int[data.length]; 08*v~(T
mergeSort(data,temp,0,data.length-1); -IV]U*4
} 4WK3.6GN
V*~Zs'L'E
private void mergeSort(int[] data, int[] temp, int l, int r) { mkR2i>
int i, j, k; #KO,~]k5|e
int mid = (l + r) / 2; 2it?$8#i
if (l == r) 3h<,
return; ]kboG%Dl?9
if ((mid - l) >= THRESHOLD) [+P#tIL
mergeSort(data, temp, l, mid); jVq(?Gc
else l}qE 46EL
insertSort(data, l, mid - l + 1); ^b %0B
if ((r - mid) > THRESHOLD) 4f<$4d^md
mergeSort(data, temp, mid + 1, r); Q%f|~Kl-hd
else <m'ow
insertSort(data, mid + 1, r - mid); M8u<qj&<O
N?.%?0l
for (i = l; i <= mid; i++) { 9+pmS#>_
temp = data; A= w9V
} Nv"EV;$
for (j = 1; j <= r - mid; j++) { )RcL/n
temp[r - j + 1] = data[j + mid]; ]~3U
} N;[>,0&z
int a = temp[l]; ccL~#c0P7
int b = temp[r]; 3'X.}>o
for (i = l, j = r, k = l; k <= r; k++) { (P`3 @H
if (a < b) { +U@<\kIF
data[k] = temp[i++]; ZzX~&95G
a = temp; D|.ic!w'
} else { twx[s$O'b
data[k] = temp[j--]; & GreN
b = temp[j]; @/1w4'M
} h?pkE
} D:K4H+ch
} ()H:UvM=t
Km^&<3ch#
/** ,\@O(; mF
* @param data J4\qEO
* @param l h5K$mA5
* @param i CoA6
*/ 8}(]]ayl
private void insertSort(int[] data, int start, int len) { xL" |)A =
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); I&YSQK:b
} :GJ &_YHf
} F,'exuZ
} M8TSt\
} -neKuj
uAWM\?
堆排序： Zcc9e03
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package org.rut.util.algorithm.support; LupkrxV
]EpWSs!"g
import org.rut.util.algorithm.SortUtil; x|5k<CiA
b4pm_Um
/** =ha{Ziryo
* @author treeroot &:7ZQ1
* @since 2006-2-2 3=L.uXVb
* @version 1.0 Ft!],n-n*
*/ Tq~=TSD
public class HeapSort implements SortUtil.Sort{ vz!s~cAt
71{p+3Z&
/* (non-Javadoc) k|!EDze43?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O &-wxJ]S
*/ ]H1I,`=@
public void sort(int[] data) { =3v]gOcO
MaxHeap h=new MaxHeap(); LA)[ip4
h.init(data); %?Ev|:i`@
for(int i=0;i h.remove(); ~T89_L
System.arraycopy(h.queue,1,data,0,data.length); mN19WQ(r
} 6!(@@^7{*
Q0ON9gqqv
private static class MaxHeap{ \0gM o&
(zFi$
void init(int[] data){ k Zq!&
this.queue=new int[data.length+1]; &EnuE0BD
for(int i=0;i queue[++size]=data; ^) s2$A:L
fixUp(size); lO_UPC\@fw
} %p0xM
} {qa Aq%'
@#-q^}3
private int size=0; C;vtY[}<
Vkc#7W(
private int[] queue; w/K_B:s
HC}YY2
public int get() { :]1TGfS
return queue[1]; 2Roc|)-47
} Kp,M"Y
aT$9;
public void remove() { Xqm::1(-(
SortUtil.swap(queue,1,size--); ) v,:N.@Q
fixDown(1); 9uQ 4u/F
} J>bJ 449B
file://fixdown UCClWr
private void fixDown(int k) { ,9o"43D:a|
int j; dB5b@9*
while ((j = k << 1) <= size) { >#y^;/bb
if (j < size %26amp;%26amp; queue[j] j++; bAm(8nT7w
if (queue[k]>queue[j]) file://不用交换 }7.PH'.8
break; ;y2/-tL?
SortUtil.swap(queue,j,k); d:U9pC$
k = j; Zc`BiLzrIG
} GHeVp/u
} se>MQM5 )
private void fixUp(int k) { '&|=0TDd+
while (k > 1) { ,5*eX
int j = k >> 1; L~NbdaO
if (queue[j]>queue[k]) 8UVmv=T
break; ;IokThI
SortUtil.swap(queue,j,k); 9b*nLyYVz
k = j; ZKckAz\#
} 2j[&=R/.
} b^$|Nz;
DY?Kfvef
} |Xk4&sDrK
Z7?~S2{c
} '`uwJ&@
y)@[Sl>
SortUtil： :65~[$2
os]8BScx
package org.rut.util.algorithm; 5qP:/*+
qDfd.gL
import org.rut.util.algorithm.support.BubbleSort; [F6U+1n8e
import org.rut.util.algorithm.support.HeapSort; SK#(#OQoh
import org.rut.util.algorithm.support.ImprovedMergeSort; *9{Z$IA9w
import org.rut.util.algorithm.support.ImprovedQuickSort; Ub* wuI
import org.rut.util.algorithm.support.InsertSort; uPl\I6k
import org.rut.util.algorithm.support.MergeSort; `p;I}
import org.rut.util.algorithm.support.QuickSort; 9Q+'n$s0^
import org.rut.util.algorithm.support.SelectionSort; la+[bm<v
import org.rut.util.algorithm.support.ShellSort; SrK)t.oK
XnWr5-;
/** N/K.%<h
* @author treeroot 9B7^lR
* @since 2006-2-2 [+DW >Et
* @version 1.0 A'&K/)Z
*/ -u8NF_{c
public class SortUtil { ptZ <ow&
public final static int INSERT = 1; ^i} L-QR
public final static int BUBBLE = 2; yLQ*"sw\
public final static int SELECTION = 3; x-?Sn' m
public final static int SHELL = 4; uvG]1m#
public final static int QUICK = 5; dKxyA"@
public final static int IMPROVED_QUICK = 6; 1jF`5k
public final static int MERGE = 7; PU1Qsb5
public final static int IMPROVED_MERGE = 8; cj'}4(
public final static int HEAP = 9; ]n~ilS.rkl
`I,,C,{C
public static void sort(int[] data) { n*{sTT
sort(data, IMPROVED_QUICK); O2%?
} De(Hw& IV
private static String[] name={ ~,B5Hc 2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" aD$v2)RR
}; S_IUV)
TmV,&['mg
private static Sort[] impl=new Sort[]{ Y/ .Z.FD`
new InsertSort(), Us0EG\Y
new BubbleSort(), T"DlT/\
new SelectionSort(), ^8AXxE
new ShellSort(), CyXRi}W.
new QuickSort(), 428>BQA
new ImprovedQuickSort(), |='z{WS
new MergeSort(), Qh'ATo
new ImprovedMergeSort(), >^*+iEe
new HeapSort() M 4?ig}kh
}; 2 Cv4=S
?1K#dC52#
public static String toString(int algorithm){ vbC\?\_
return name[algorithm-1]; #nPQ!NB/
} &b%zQ4%d-`
PC-"gi=h
public static void sort(int[] data, int algorithm) { /*X2c6<d
impl[algorithm-1].sort(data); I ,z3xU
} =aBctd:eX`
~3WF,mW
public static interface Sort { )6D,d5<
public void sort(int[] data); :i.{
} Wg<(ms dj
h_+dT
public static void swap(int[] data, int i, int j) { rFj-kojg
int temp = data; vPTM
data = data[j]; |w<H!lGe!$
data[j] = temp; 2;DuHO1
} D)m5
} M$>1L