[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; 8\I(a]kM`
} N#[/h96F
int i1=l; JBoo7a1
int i2=mid+1; <n6/np!
for(int cur=l;cur<=r;cur++){ )3G?5 OTS
if(i1==mid+1) A@DIq/^xM
data[cur]=temp[i2++]; Qz$.t>@V=
else if(i2>r) YO,GZD`-o
data[cur]=temp[i1++]; pkk0?$l",
else if(temp[i1] data[cur]=temp[i1++]; E&[ox[g{
else ~4\bR
data[cur]=temp[i2++]; ^8MgNVoJ)
} |=h>3Z=r!
} `q xg
[fW:%!Y'
} 4e%SF|(Y'h
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改进后的归并排序: ~+T~}S
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package org.rut.util.algorithm.support; j;+nnpg
OKf/[hyu
import org.rut.util.algorithm.SortUtil; ol:_2G2xQ
Pt1Htt:BE
/** aqyXxJS8
* @author treeroot WrG)&&d
* @since 2006-2-2 p1|@F^Q
* @version 1.0 qY0Ic5wCY
*/ |faXl3|
public class ImprovedMergeSort implements SortUtil.Sort { 0&mz'xra
Zmp ^!|=X!
private static final int THRESHOLD = 10; V'6%G:?0a
G7),!Qol
/* wEkW=
* (non-Javadoc) 3b[_0
* BRW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QTLOP~^
*/ ] xH `
public void sort(int[] data) { XDI@mQmzB
int[] temp=new int[data.length]; SgY>$gP9S
mergeSort(data,temp,0,data.length-1); `Zk?.1*2/
} c^=,@#
Zd5frc$
private void mergeSort(int[] data, int[] temp, int l, int r) { GQ[\R&]q<
int i, j, k; sXfx[)T<
int mid = (l + r) / 2; k*n5+[U^tP
if (l == r) `Y(/G"]
return; "urQUpF
if ((mid - l) >= THRESHOLD) -bs~{
mergeSort(data, temp, l, mid); h\20
else M&>Z[o
insertSort(data, l, mid - l + 1); |~Z+Xla
if ((r - mid) > THRESHOLD) M"V?fn'
mergeSort(data, temp, mid + 1, r); g!K(xhEO
else Y]Xal
insertSort(data, mid + 1, r - mid); )9PQj
Uh9$e
for (i = l; i <= mid; i++) { 2} T"|56
temp = data; r?Z8_5Y
} &]ImO RN
for (j = 1; j <= r - mid; j++) { IRcZyry
temp[r - j + 1] = data[j + mid]; :Tjo+vw7$H
} &1VC0"YJWy
int a = temp[l]; >Vg<J~[g
int b = temp[r]; G_X'd
for (i = l, j = r, k = l; k <= r; k++) { ci*Z9&eS+
if (a < b) { X"[c[YT!%[
data[k] = temp[i++]; >Ks|yNJ
a = temp; HZM&QZHx)`
} else { H(""So7L
data[k] = temp[j--]; .=K@M"5&
b = temp[j]; G8<,\mg+
} /r]IY.
} .ipYZg'V
} fc&4e:Ve
g8B@M*JA
/** &|',o ?'F
* @param data ^TDHPBlG
* @param l JA1(yt
* @param i 4wK!)Pwq
*/ =m1B1St2
private void insertSort(int[] data, int start, int len) { 9?]4s-~
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n32BHOVE
} L.erP* w
} 'GNT'y_
} [S*bN!t
} d7l0;yR&+
jMZ{>l.v
堆排序： 4Kx;F 9!%~
wLNO\JP'
package org.rut.util.algorithm.support; !v94FkS>
b^FB[tZ\x
import org.rut.util.algorithm.SortUtil; :~g=n&x
0h$23.
/** mNs&*h}
* @author treeroot 7zy6`OP
* @since 2006-2-2 bl:.D~@
* @version 1.0 qf+I2kyS
*/ ` 8.d
public class HeapSort implements SortUtil.Sort{ mO]>(^c
h*&-[nSo
/* (non-Javadoc) lB3W|-Ci
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LiiQ;x
*/ 347p2sK>
public void sort(int[] data) { }cMb0`oA
MaxHeap h=new MaxHeap(); Rl-Sr
h.init(data); wD"Y1?Mr
for(int i=0;i h.remove(); \~U8<z
System.arraycopy(h.queue,1,data,0,data.length); JZN'U<R
} gNN{WFHQX:
@e+QGd;}
private static class MaxHeap{ p)Z$q2L
g)2}`}
void init(int[] data){ =3l%ZL/
this.queue=new int[data.length+1]; "M1[@xog
for(int i=0;i queue[++size]=data; vMDV%E S1t
fixUp(size); <+pwGKtD
} l *.#g
} gHA"O@HgDI
"ifYy>d
private int size=0; leX&py
g/'MECB
private int[] queue; RCo!sZP}
%Qrf ]
public int get() { <<Ut@243\
return queue[1]; (*BQd1Z
} Pf-k"7y
X.bNU
public void remove() { fD]}&xc
SortUtil.swap(queue,1,size--); U c$RYPq
fixDown(1); K`768%q
} 9UZKL@KC
file://fixdown jL>IX`,+6
private void fixDown(int k) { 8?h-H#h
int j; Hh4$Qr;R
while ((j = k << 1) <= size) { 9JpPas$]
if (j < size %26amp;%26amp; queue[j] j++; $9j\sZj&
if (queue[k]>queue[j]) file://不用交换 $62!R]C9\
break; O}"VK
SortUtil.swap(queue,j,k); pQ!NhzQ
k = j; [n44;
} xP "7B9B
} >@rsh-Z
private void fixUp(int k) { c54oQ1Q&"
while (k > 1) { 5iwJdm
int j = k >> 1; L"P$LEk
if (queue[j]>queue[k]) SBgBZm}%
break; 3g`uLA X>u
SortUtil.swap(queue,j,k); :q<8:,rP
k = j; 00[Uk'Q*5
} n0:'h}^
} a2SMNC]
xJ:15eDC
} >A;Mf*E
CMI%jyiX
} JJPU!
~q5"'
SortUtil： c-(,%0G0
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package org.rut.util.algorithm; cLEBcTx
Oca_1dlx
import org.rut.util.algorithm.support.BubbleSort; /ZUKt
import org.rut.util.algorithm.support.HeapSort; 9,sj,A1
import org.rut.util.algorithm.support.ImprovedMergeSort; "k o?AUt
import org.rut.util.algorithm.support.ImprovedQuickSort; 4siNY4i"
import org.rut.util.algorithm.support.InsertSort; gu7mGHn-
import org.rut.util.algorithm.support.MergeSort; pQKR
import org.rut.util.algorithm.support.QuickSort; #HfvY}[o
import org.rut.util.algorithm.support.SelectionSort; z:{'IY
import org.rut.util.algorithm.support.ShellSort; waz)jEk
Zui2O-L?V
/** N0,wT6.
* @author treeroot ,`ST Va-
* @since 2006-2-2 *BF5B\[r?
* @version 1.0 uQ=p }w
*/ dgh)Rfp3
public class SortUtil { y1GVno
public final static int INSERT = 1; TL-sxED,,D
public final static int BUBBLE = 2; (sHqzWh
public final static int SELECTION = 3; y0k*iS e
public final static int SHELL = 4; )7l+\t
public final static int QUICK = 5; e)]9u$x
public final static int IMPROVED_QUICK = 6; k7z;^:
public final static int MERGE = 7; *NHBwXg+
public final static int IMPROVED_MERGE = 8; ;P3sDN
public final static int HEAP = 9; jCa%(2~iQ7
/7/d u[P6
public static void sort(int[] data) { OXd617
sort(data, IMPROVED_QUICK); B2w\
} -!f)P=S
private static String[] name={ "l&=a1l
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8QDs4Bv|
}; U` uP^
r BQFC4L
private static Sort[] impl=new Sort[]{ 7=(rk
new InsertSort(), _w0t+=&
new BubbleSort(), RY3ANEu+
new SelectionSort(), /Uth#s:
new ShellSort(), Ab ,n^
new QuickSort(), QV,X> !Nz
new ImprovedQuickSort(), 'Alt+O_
new MergeSort(), J6r"_>)z
new ImprovedMergeSort(), GVhO}m
new HeapSort() (99P9\[p
}; |\;oFuCv##
+[Cdd{2
public static String toString(int algorithm){ v]SHude{
return name[algorithm-1]; A{3Aw|;
} $<cio X
G5a PjP
public static void sort(int[] data, int algorithm) { <ZGEmQ
impl[algorithm-1].sort(data); mN Hd
} v6(Yz[
5G"LuA
public static interface Sort { +RWP;rk
public void sort(int[] data); HI)MBrj;r
} 4+2XPaIm
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public static void swap(int[] data, int i, int j) { &D0suK#
int temp = data; ?0 93'lA
data = data[j]; c@;$6WSG^
data[j] = temp; XJ,P8nx
} H'7AIY}
} R1OC7q