[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; E-2eOT
} Y]g?2N=E
int i1=l; aUopNmN
int i2=mid+1; vqdX^m^PY
for(int cur=l;cur<=r;cur++){ obH;g*
if(i1==mid+1) 47>>4_Hz
data[cur]=temp[i2++]; aaW]JmRb
else if(i2>r) ~$,qgf
data[cur]=temp[i1++]; 4'>1HW
else if(temp[i1] data[cur]=temp[i1++]; ml!5:r>
else <[~,uR7
data[cur]=temp[i2++]; 5K%Wa]W
} {MBTP;{*~
} }"s;\?a
MgMD\
} lS5ny
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改进后的归并排序: L"(4R^]
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package org.rut.util.algorithm.support; D-p.kA3MJ
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import org.rut.util.algorithm.SortUtil; ^A_;#vK
{8RFK4! V@
/** (P|pRVO
* @author treeroot !nf-}ze{
* @since 2006-2-2 t+Bf#:
* @version 1.0 :!TIK1
*/ FY3IUG
public class ImprovedMergeSort implements SortUtil.Sort { :$r ^_
@C8DZ5)
private static final int THRESHOLD = 10; HLK@xKD<
BOVPKX
/* Q[4: xkU
* (non-Javadoc) Dt}rR[yJ
* _=XX~^I,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6dqsFns}e
*/ ^"8wUsP
public void sort(int[] data) { f>$``.O
int[] temp=new int[data.length]; e]8,:Gd(
mergeSort(data,temp,0,data.length-1); 2tQ`/!m>v$
} $&I'o
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private void mergeSort(int[] data, int[] temp, int l, int r) { kL*0M<0 (
int i, j, k; SX0_v_%M
int mid = (l + r) / 2; N@T.T=r
if (l == r) ed!>)Cb
return; V A^l+Z,d
if ((mid - l) >= THRESHOLD) T]9\VW4
mergeSort(data, temp, l, mid); es:2M |#O
else 6QQfQ,
insertSort(data, l, mid - l + 1); qCQ./"8
if ((r - mid) > THRESHOLD) 15\Ph[6g
mergeSort(data, temp, mid + 1, r); uZjC c M
else c,\i"=!$
insertSort(data, mid + 1, r - mid); ^eq</5q D
3,X/,'
for (i = l; i <= mid; i++) { :Ixx<9c.
temp = data; 9"{W,'r&d
} HfNDD|Zz
for (j = 1; j <= r - mid; j++) { `TLzVB-j3
temp[r - j + 1] = data[j + mid]; {tP%epQ
} B2=\2<
int a = temp[l]; o2H1N~e#c
int b = temp[r]; WN]<q`.
for (i = l, j = r, k = l; k <= r; k++) { 'I}:!Z
if (a < b) { J4$! 68
data[k] = temp[i++]; .^(/n9|o-
a = temp; +C]&2zc.
} else { j{++6<tr
data[k] = temp[j--]; 256LHY|6
b = temp[j]; y2L#:[8
} }ut]\]b
} <U Zd;e@
} 7L5P%zLtB
D=f7NVc>Q
/** : esg(
* @param data z,SYw &S
* @param l Aj>[z8!,
* @param i bzpFbfb
*/ m!n/U-^
private void insertSort(int[] data, int start, int len) { W~n.Xeu{C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )$GIN/i
} p zw8T
} c7uG9
} ~"x5U{K48S
} "8)z=n
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堆排序： j V3)2C}
h!@,8y[B
package org.rut.util.algorithm.support; JtKp(k&
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import org.rut.util.algorithm.SortUtil; ^Mkk@F&1
;!>Wz9
/** Xf'=+f2p
* @author treeroot `(y(w-:W1
* @since 2006-2-2 p&p.Q^"ok
* @version 1.0 gJN0!N'
*/ 6rti '
public class HeapSort implements SortUtil.Sort{ )KSoq/
K+\nC)oG
/* (non-Javadoc) AEirj /
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "d/s5sP|S
*/ jR ~DToQ
public void sort(int[] data) { !v|ISyK
MaxHeap h=new MaxHeap(); F?+3%>/A@
h.init(data); {BBw$m,o
for(int i=0;i h.remove(); RrrK*Fk8=
System.arraycopy(h.queue,1,data,0,data.length); W[bmzvJ_X
} ;E;To\NCYF
E`\8TqO
private static class MaxHeap{ C2U~=q>>
% ~]xuP[
void init(int[] data){ Pf_F59"
this.queue=new int[data.length+1]; 4p`XG1Pt
for(int i=0;i queue[++size]=data; #EO1`9f48x
fixUp(size); AIl4]F5I
} ~!iQ6N?PY
} FVsj;
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private int size=0; b}9[s
FwAKP>6*
private int[] queue; \BV 0zKd
U 5w:"x
public int get() { z$lF)r:Bc
return queue[1]; .Ce8L&cU
} Lm*VN~2
*V^ #ga#A
public void remove() { &[R8Q|1j
SortUtil.swap(queue,1,size--); 8^^[XbH
fixDown(1); MhEw _{?
} !eR3@%4
file://fixdown S0/usC[r
private void fixDown(int k) { $P o}
int j; $o?@0
while ((j = k << 1) <= size) { cR{>IH4^
if (j < size %26amp;%26amp; queue[j] j++; 4'pS*v
if (queue[k]>queue[j]) file://不用交换 :PYtR
break; .lG5=Th!
SortUtil.swap(queue,j,k); PaB!,<A
k = j; *4Fr&^M\
} -4#2/GXNO
} j=+"Qz/hr_
private void fixUp(int k) { ^H'a4G3
while (k > 1) { EpPf_ \o
int j = k >> 1; ^4Am %yyT
if (queue[j]>queue[k]) `b5 @}',
break; >RI>J.~
SortUtil.swap(queue,j,k); we7c`1E
k = j; .aOnGp
} {i~8 :
} )vB2!H/
B6P|Z%E;D6
} V}w;Y?]J
ybdd;t}&1
} Y$8JM
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SortUtil： O;Y:uHf
t=euE{c
package org.rut.util.algorithm; dj6*6qX0'^
4pU>x$3$
import org.rut.util.algorithm.support.BubbleSort; D<{{ :7n
import org.rut.util.algorithm.support.HeapSort; !G5a*8]
import org.rut.util.algorithm.support.ImprovedMergeSort; &F$:Q:* *
import org.rut.util.algorithm.support.ImprovedQuickSort; d5I f"8`@
import org.rut.util.algorithm.support.InsertSort; ]<uQ.~
import org.rut.util.algorithm.support.MergeSort; R5_i15<
import org.rut.util.algorithm.support.QuickSort; 2 +5e0/_V
import org.rut.util.algorithm.support.SelectionSort; l7[7_iB&E
import org.rut.util.algorithm.support.ShellSort; #%3rTU
W1aa:hEf
/** C.MoKa3
* @author treeroot C&\5'[*
* @since 2006-2-2 YA(@5CZ
* @version 1.0 +A_J1iJ<
*/ H(^bC5'
public class SortUtil { $3+PbYY
public final static int INSERT = 1; n";02?@F
public final static int BUBBLE = 2; ,"}Rg1\4t
public final static int SELECTION = 3; *~$~yM/~3U
public final static int SHELL = 4; { >{B`e`$
public final static int QUICK = 5; Q-TV*FD.
public final static int IMPROVED_QUICK = 6; =TvzS%U
public final static int MERGE = 7; wRNroQ
public final static int IMPROVED_MERGE = 8; =dP{Gh
public final static int HEAP = 9; ?ne_m:J[
2LY=DL7
public static void sort(int[] data) { !{^\1QK
sort(data, IMPROVED_QUICK); O OFVnu
} 9X<OJT;3J
private static String[] name={ ;)0w:Zn/[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" PG5- ;i/
}; 0pe3L
w>?Un,K
private static Sort[] impl=new Sort[]{ u8zbYd3
new InsertSort(), D]! aT+
new BubbleSort(), %Tn#-
new SelectionSort(), N^?9ZO
new ShellSort(), Wk;5/
new QuickSort(), Pj#'}ru!
new ImprovedQuickSort(), XV>JD/K2
new MergeSort(), ?@6b>='!
new ImprovedMergeSort(), 4R+.N
new HeapSort() v*hRz;
}; .]4W!])9
em@EDMvI
public static String toString(int algorithm){ jZfx Jm
return name[algorithm-1]; U$&hZ_A
} U4?(A@z9^
m@Ev~~;
public static void sort(int[] data, int algorithm) { 8 }'|]JK
impl[algorithm-1].sort(data); 3. WF}8
} 8U2dcx:G3
VU|dV\>
public static interface Sort { )n7l'}o?+
public void sort(int[] data); )YW<" $s
} 79J-)e9
1,y&d}GW
public static void swap(int[] data, int i, int j) { FeJr\|FT
int temp = data; tYW>t9
data = data[j]; d~tuk4F
data[j] = temp; l":c
} )bOBQbj
} 5R MS(