[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; ^N^G?{EV/#
} sUlf4<_zW
int i1=l; (m'-1wX.
int i2=mid+1; #HV5M1mb
for(int cur=l;cur<=r;cur++){ )n)AmNpq
if(i1==mid+1) X{x(p
data[cur]=temp[i2++]; ;h1hz^Wq
else if(i2>r) ou-#+Sdd
data[cur]=temp[i1++]; "_&ZRcd*
else if(temp[i1] data[cur]=temp[i1++]; U@q5`4-!8
else I\TSVJk^Xi
data[cur]=temp[i2++]; "m{i`<,
} UJ,vE}=_{
} Lk|`\I T
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} E"'u2jEG^
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改进后的归并排序: #M~yt`R~
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package org.rut.util.algorithm.support; s=:)!M.i
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import org.rut.util.algorithm.SortUtil; [s$x"Ex
J.R]) &CB
/** MB;rxUbhe3
* @author treeroot B>1,I'/$.
* @since 2006-2-2 |yz[mP*;o
* @version 1.0 FaCW +9B
*/ 07Yak<+~
public class ImprovedMergeSort implements SortUtil.Sort { @Y`Z3LiR$
'yVe&5?
private static final int THRESHOLD = 10; ]A}ZaXd
;.AMP$o`(Y
/* 8Ygf@*9L4
* (non-Javadoc) 3UXZ|!-
* j_5&w Znq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L*4"D4V
*/ Gx$m"Jeq\
public void sort(int[] data) { 3ibQbk
int[] temp=new int[data.length]; {X<g93
mergeSort(data,temp,0,data.length-1); j5DCc,s
} C7F\Y1Wj
vLxaZWr
private void mergeSort(int[] data, int[] temp, int l, int r) { 5/Qu5/
int i, j, k; +F q_w
int mid = (l + r) / 2; 4!Radl3`
if (l == r) c3GBY@m
return; `Njvk
if ((mid - l) >= THRESHOLD) <pV8 +V)
mergeSort(data, temp, l, mid); zgz!"knVx
else j_d}?jh
insertSort(data, l, mid - l + 1); p>eYi \'
if ((r - mid) > THRESHOLD) R`]@.i4tt
mergeSort(data, temp, mid + 1, r); [_jw8`
else /RJ]MQ\*O
insertSort(data, mid + 1, r - mid); 3\4e{3$
vv&< 7[
for (i = l; i <= mid; i++) { 2H w7V3q
temp = data; A{4,ih"5
} }j2;B 8j
for (j = 1; j <= r - mid; j++) { >d`GNE
temp[r - j + 1] = data[j + mid]; Pk;/4jt4
} $}vzBuWHwN
int a = temp[l]; j^#p#`m
int b = temp[r]; md<^x(h"<
for (i = l, j = r, k = l; k <= r; k++) { _IdW5G
if (a < b) { `uMc.:5\
data[k] = temp[i++]; Q9AvNj>X
a = temp; ilQ}{p6I
} else { g%Tokl
data[k] = temp[j--]; S`YT"|~
b = temp[j]; I!?Xq
} Csy$1;"A
} HI{q#
} F?tWx+N<{
q6rkp f,Tl
/** ,+IFV
* @param data S'^ q
* @param l ;o'r@4^&$R
* @param i CyLwCS{V\
*/ d+G%\qpzQ
private void insertSort(int[] data, int start, int len) { @:RoYvk$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Dqo#+_v
} X+sKG5nS
} baD063P;
} bK!h{Rr
} C_>XtcU
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堆排序： %\,9S`0
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package org.rut.util.algorithm.support; LI@BB:)[
#8M?y*<I
import org.rut.util.algorithm.SortUtil; :QP1!
~}j+~
/** )EB+(c~E
* @author treeroot )bih>>H
* @since 2006-2-2 n=4
* @version 1.0 FS=yc.Q_
*/ xi{r-D8Z
public class HeapSort implements SortUtil.Sort{ niCK(&z
2DPv7\fW
/* (non-Javadoc) 'ux!:b"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `1P|<VbZ
*/ $%cHplQz5
public void sort(int[] data) { ms5?^kS2O
MaxHeap h=new MaxHeap(); s&pnB
h.init(data); 9s_^?q
for(int i=0;i h.remove(); &*"*b\
System.arraycopy(h.queue,1,data,0,data.length); LA_{[VWYp>
} \~A qA!)6
e(/F:ZEh
private static class MaxHeap{ !@ ]IJ"\
G\F>*
void init(int[] data){ r!fUMDS
this.queue=new int[data.length+1]; J)n_u),
for(int i=0;i queue[++size]=data; r@C~_LgL)
fixUp(size); Dq~;h \='
} v[|W\y@H/3
} 3e'6A^#
hsY?og_H
private int size=0; Z6${nUX
kd!?N
private int[] queue; 8cOft ;|qB
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public int get() { %H\J@{f
return queue[1]; }NyQ<,+mq&
} u$^tRz9
;$&\:-6A#
public void remove() { CnL=s6XD'
SortUtil.swap(queue,1,size--); In_"iEo,
fixDown(1); HdxP:s.T
} `K5*Fjx
file://fixdown :!g|pd[{ag
private void fixDown(int k) { '42$O
int j; y(QFf*J
while ((j = k << 1) <= size) { l[:Aq&[o3
if (j < size %26amp;%26amp; queue[j] j++; 1}a4AGAp
if (queue[k]>queue[j]) file://不用交换 zsJ# CDm
break; ="YGR:
SortUtil.swap(queue,j,k); T%)E!:}v
k = j; 7xeqs q
} ;_"|#
} z5$Q"Y.D
private void fixUp(int k) { u|t l@_
while (k > 1) { a)ry}E =f
int j = k >> 1; I<940PZ
if (queue[j]>queue[k]) =D$ED^W
break; uRko[W(
SortUtil.swap(queue,j,k); J;obh.}u"{
k = j; 0i_:J
} iv$YUM+
} DO80HS3ZD
* HKu%g
} %nY\"
W#<1504ip
} 7m-%
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SortUtil： pc*)^S
/jGBQ-X
package org.rut.util.algorithm; hNN[djR
/dYv@OU?
import org.rut.util.algorithm.support.BubbleSort; l@B9}Icq
import org.rut.util.algorithm.support.HeapSort; C*(
import org.rut.util.algorithm.support.ImprovedMergeSort; kh0cJE\_^
import org.rut.util.algorithm.support.ImprovedQuickSort; 'vBZh1`p
import org.rut.util.algorithm.support.InsertSort; $].htm
import org.rut.util.algorithm.support.MergeSort; D|9+:Y
import org.rut.util.algorithm.support.QuickSort; *(Dmd$|0|
import org.rut.util.algorithm.support.SelectionSort; PoF3fy%.
import org.rut.util.algorithm.support.ShellSort; <R$ 2x_
N;|^C{uz
/** ]j*2PSJG
* @author treeroot } jj)
* @since 2006-2-2 EhHxB fAQ
* @version 1.0 en< $.aY
*/ {=[>N>"
public class SortUtil { e NIzI]~
public final static int INSERT = 1; z lr!
public final static int BUBBLE = 2; k3#'g'>yh
public final static int SELECTION = 3; 0ae8Xm3J@R
public final static int SHELL = 4; f(5(V %
public final static int QUICK = 5; p +i1sY
public final static int IMPROVED_QUICK = 6; +%W8Juu
public final static int MERGE = 7; ~(d {j}M>
public final static int IMPROVED_MERGE = 8; F]3Y,{/V
public final static int HEAP = 9; s7Agr!>f
B`}um;T#~,
public static void sort(int[] data) { nzflUR{`-
sort(data, IMPROVED_QUICK); h+g\tYWGP
} #Lhv=0op
private static String[] name={ G|g^yaq>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" nQc#AFg
}; /WTEz\k
O]u'7nO{{
private static Sort[] impl=new Sort[]{ f4f2xe7\Q
new InsertSort(), OjUPvR2 0
new BubbleSort(), `t U
new SelectionSort(), Z4VFfGCTL
new ShellSort(), \~5|~|9<
new QuickSort(), q7X]kr*qx
new ImprovedQuickSort(), OH\^j1x9I
new MergeSort(), ]Btkoad
new ImprovedMergeSort(), n[ B~C
new HeapSort() 3 ~v 17
}; A0DGDr PD
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public static String toString(int algorithm){ 5BhR4+1J
return name[algorithm-1]; iQ/~?'PB
} |H5.2P&9-5
I/f\m}}ba
public static void sort(int[] data, int algorithm) { So aqmY;+
impl[algorithm-1].sort(data); Op'a=4x]
} CFaY=Cy
OBWWcL-
public static interface Sort { Y2 @8B6
public void sort(int[] data); ^LMgOA(7
} /5ZX6YkeH
bKo %Ak,
public static void swap(int[] data, int i, int j) { L!fTYX#K]
int temp = data; 11=$]K>
data = data[j]; 'X?xn@?
data[j] = temp; xl\Kj2^
} $m4-^=
} Jxe+LG