[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; m?M(79u[
} "&2D6
int i1=l; UiYA#m
int i2=mid+1; *~:@xMa
for(int cur=l;cur<=r;cur++){ ;UWdT]>!?
if(i1==mid+1) nt5 ~"8
data[cur]=temp[i2++]; jR/X}XQtY
else if(i2>r) z%;\q$
data[cur]=temp[i1++]; {yG)Ii
else if(temp[i1] data[cur]=temp[i1++]; 8D+OF 6CM
else a)Wf* <B
data[cur]=temp[i2++]; T`WFY
} `*N0 Lbl]
} m,.d< **
'2.F-~
} @Qx;J<{+g
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改进后的归并排序: )8Q|y
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package org.rut.util.algorithm.support; XHe=
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import org.rut.util.algorithm.SortUtil; ?Z14l0iZ%d
' !_44
/** U}qW9X;o
* @author treeroot M_XZOlW5
* @since 2006-2-2 !-;Me&"I=`
* @version 1.0 h.7 1O"N
*/ MA1,;pv6
public class ImprovedMergeSort implements SortUtil.Sort { 8a05`ZdP
\<PX'mnO
private static final int THRESHOLD = 10; @D60
:))AZ7_
/* 3PJ
* (non-Javadoc) _5X}&>>lhF
* H$[--_dI{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WrD20Q$9Q
*/ :V_$?S
public void sort(int[] data) { goHr#@
int[] temp=new int[data.length]; T+~~w'v0
mergeSort(data,temp,0,data.length-1); 0[hl&7 Ab@
} JT:9"lmJz,
=)bZSb"<"
private void mergeSort(int[] data, int[] temp, int l, int r) { Y{J/Oib
int i, j, k; }$UuYO/i
int mid = (l + r) / 2; <4!w2vxG
if (l == r) @FbzKHdV/
return; ]T*{M
if ((mid - l) >= THRESHOLD) TVjY8L9'h
mergeSort(data, temp, l, mid); [S<DdTY9hZ
else i;\i4MT
insertSort(data, l, mid - l + 1); Z,d/FC#y(
if ((r - mid) > THRESHOLD) @*c+`5)_
mergeSort(data, temp, mid + 1, r); x[>A'.m@)
else eEU:
insertSort(data, mid + 1, r - mid); Q% dpGI
RL&*.r&
for (i = l; i <= mid; i++) { KlrKGmy,)
temp = data; N.&K"J
} w1GCjD*y
for (j = 1; j <= r - mid; j++) { iYnw?4Y
temp[r - j + 1] = data[j + mid]; Y&&Y:+ V
} ! 4s$93
int a = temp[l]; \XpPb{:>
int b = temp[r]; D&oC1
for (i = l, j = r, k = l; k <= r; k++) { r]]Ke_s!
if (a < b) { ~q1s4^J
data[k] = temp[i++]; r7IhmdA
a = temp; L~yy;)]W
} else { gZPJZN/cpz
data[k] = temp[j--]; o+tY[UX
b = temp[j]; &bL1G(}
} "@f`O
} h`vM+,I
} *wSl~J|ZM%
#Y{"`5>
/** jf%Ydr}`
* @param data k5ZwGJ#r
* @param l =W4cWG?+
* @param i ^X_%e|
*/ W&*{j;e9%I
private void insertSort(int[] data, int start, int len) { t4JGd)r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); D{8V^%{
} '@:;oe@]
} <<A@69"4n
} JN8k x;@
} JTb<uC
@lJGdp
堆排序： oZ8SEC"]
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package org.rut.util.algorithm.support; =*(d+[_
xQD#; 7
import org.rut.util.algorithm.SortUtil; G's/Q-'[\
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/** )q=1<V44d
* @author treeroot JRo{z{!O6
* @since 2006-2-2 V,Gt5lL&/!
* @version 1.0 aI\VqOt]
*/ O{dx+f
public class HeapSort implements SortUtil.Sort{ 2N]y)S_<V
Ny~;"n
/* (non-Javadoc) TQEZ<B$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kNjbpCE\!
*/ }5]NUxQ_
public void sort(int[] data) { *in_Zt3
MaxHeap h=new MaxHeap(); `#(4K4]1.
h.init(data); l,/5$JGnk
for(int i=0;i h.remove(); $@U`zy"Y
System.arraycopy(h.queue,1,data,0,data.length); @vv`86bm
} UtWoSFZ'o!
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private static class MaxHeap{ GV2}K <s
Z@h]dU5%a
void init(int[] data){ My[L3KTTp
this.queue=new int[data.length+1]; 3!}#@<j
for(int i=0;i queue[++size]=data; i$F)h<OU+
fixUp(size); $6J5yE
} '2 )d9_ w
} k\%{1oRA
>?DrC/
private int size=0; NKMB,b
wHY;Y-(ZT
private int[] queue; r>G$u
%_z]iz4
public int get() { fkI<RgM
return queue[1]; Zkz:h7GUG-
} @&~BGh
mDq01fU4
public void remove() { tL3(( W"
SortUtil.swap(queue,1,size--); *&U9npN
fixDown(1); 1X{A}9nA
} C qxP@
file://fixdown LCdc7
private void fixDown(int k) { ce;9UBkOg2
int j; 7O{\^Jz1
while ((j = k << 1) <= size) { 8+!$k!=X
if (j < size %26amp;%26amp; queue[j] j++; ,~3sba
if (queue[k]>queue[j]) file://不用交换 u )ld
break; VJNPs6
SortUtil.swap(queue,j,k); ^6`R:SV4Gx
k = j; ;m&f Vp
} Jsw<,uTD
} A1Zu^_y'
private void fixUp(int k) { ZWr\v!4
while (k > 1) { \"lzmxe0p
int j = k >> 1; Zc"]Cv(
if (queue[j]>queue[k]) 7_{x '#7
break; 7.=u:PK7kM
SortUtil.swap(queue,j,k); ``NjNd
k = j; `=\G>#p<T
} ({8Q=Gh
} 9~4Kbmr>q
0 @,@
} d- ]%
aE;!mod
} ^@)+P/&
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SortUtil： 9sRP8Nj|
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package org.rut.util.algorithm; -x RsYYw
UIyOn` d"
import org.rut.util.algorithm.support.BubbleSort; |M0TG
import org.rut.util.algorithm.support.HeapSort; c#rbyx?5
import org.rut.util.algorithm.support.ImprovedMergeSort; `t8e2?GH
import org.rut.util.algorithm.support.ImprovedQuickSort; 6qw_|A&g
import org.rut.util.algorithm.support.InsertSort; [Y:HVr,
import org.rut.util.algorithm.support.MergeSort; d }]b
import org.rut.util.algorithm.support.QuickSort; 5}By2Tx
import org.rut.util.algorithm.support.SelectionSort; K@d`jb4T
import org.rut.util.algorithm.support.ShellSort; ElYHA
fG.w;Aemv5
/** NyGF57v[M
* @author treeroot bLUn0)c
* @since 2006-2-2 HPgMVp'
* @version 1.0 WUxr@0
*/ -7yX>Hjl
public class SortUtil { :<jf}[w!
public final static int INSERT = 1; J6Kfz~%
public final static int BUBBLE = 2; D@3|nS
public final static int SELECTION = 3; 1.>`h:
public final static int SHELL = 4; P]y5E9 k
public final static int QUICK = 5; P"~B2__*
public final static int IMPROVED_QUICK = 6; 69L s"e
public final static int MERGE = 7; QKF2_Acc
public final static int IMPROVED_MERGE = 8; CBvBBt*
public final static int HEAP = 9; LyQO_mT2
rDSt ~l
public static void sort(int[] data) { 0xjV*0?s
sort(data, IMPROVED_QUICK); 2R_k$kHl
} TS%cTh'ItH
private static String[] name={ hgh1G7A&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0zfrx-'zN
}; Le}q>>o;q
H37Z\xS
private static Sort[] impl=new Sort[]{ ?Jma^ S
new InsertSort(), sS0psw1
new BubbleSort(), X`vDhfh>N
new SelectionSort(), )45,~+XX
new ShellSort(), kC#;j=K?
new QuickSort(), gF:wdcO
new ImprovedQuickSort(), A^m hPBT_
new MergeSort(), 0(..]\p^d
new ImprovedMergeSort(), J5\> 8I,a
new HeapSort() GC{Ys|s
}; Isi,Tl ^
Z-~^)lo
public static String toString(int algorithm){ ^X?[zc GE
return name[algorithm-1]; ;Joo!CXHO
} .K0BK)axO
ZuE0'9
public static void sort(int[] data, int algorithm) { 2ru6bIb;
impl[algorithm-1].sort(data); Ex Qld
} c.XLEjV|
@e slF
public static interface Sort { I4)vJ0
public void sort(int[] data); Obd!
} x0#+yP
tF'67,~W
public static void swap(int[] data, int i, int j) { vXf#gX!Y
int temp = data; .5T7O_%FP
data = data[j]; X(1.Hjh
data[j] = temp; Ylf6-FbF
} hVID~L$
} 5-g02g