[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; $#n9C79Z@
} iP9]b&
int i1=l; '"7b;%EN'
int i2=mid+1; V#$QKn`;
for(int cur=l;cur<=r;cur++){ g)Hsd0
if(i1==mid+1) Dx /w&v
data[cur]=temp[i2++]; /y{fDCC
else if(i2>r) NvIg,@}
data[cur]=temp[i1++]; yc]_?S>9
else if(temp[i1] data[cur]=temp[i1++]; 9c}C<s`M
else JXkx!X_{
data[cur]=temp[i2++]; +-;v+{
} w{T$3F`@9
} 8i;drvf
7Z:HwZ
} [>GblL
m=E/um[D
改进后的归并排序: bQI :N
i03S9J
package org.rut.util.algorithm.support; $H3C/|
_z%\53h
import org.rut.util.algorithm.SortUtil; y_[VhZ%
q7aqbkwz}
/** R&t2
* @author treeroot 9=iMP~?xF
* @since 2006-2-2 &/^p:I
* @version 1.0 L T`T~|pz
*/ ,)\G<q yO6
public class ImprovedMergeSort implements SortUtil.Sort { ,V]FAIJ
]6v7iuvI
private static final int THRESHOLD = 10; rT;l#<#VE
tq}sedYhee
/* }vB{6E+h/w
* (non-Javadoc) 8Wtr,%82
* aDz% %%:r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 34)l3UI~
*/ pK{G2]OK{U
public void sort(int[] data) { D8w.r"ne
int[] temp=new int[data.length]; [8tpU&J
mergeSort(data,temp,0,data.length-1); 2.);OFk+
} [m< jM[w{
*dB3Gu{ +
private void mergeSort(int[] data, int[] temp, int l, int r) { l#ct;KZ
int i, j, k; F\;l)
int mid = (l + r) / 2; tD}{/`{_t
if (l == r) 4$2HO`@uN
return; jZ5ac=D&I
if ((mid - l) >= THRESHOLD) $M-"az]
mergeSort(data, temp, l, mid); `{w|2 [C3
else BH}rg,]G
insertSort(data, l, mid - l + 1); !F6rcDKI
if ((r - mid) > THRESHOLD) 9(=+OQ6
mergeSort(data, temp, mid + 1, r); "\9beK:l
else )knK'H(
insertSort(data, mid + 1, r - mid); >3p8o@:
qS}{O0
for (i = l; i <= mid; i++) { ri3*~?k00
temp = data; s;Zi
} ~QE?GL
for (j = 1; j <= r - mid; j++) { Vfq-H/+
temp[r - j + 1] = data[j + mid]; FDBNKQV
} ]B&jMj~y&
int a = temp[l]; HCktgL:E=
int b = temp[r]; 9ygNJX'~
for (i = l, j = r, k = l; k <= r; k++) { Rdj3dg'<
if (a < b) { Zn|lL0b{q
data[k] = temp[i++]; Q}lY1LT`
a = temp; ]U4C2}u
} else { N1:)Z`r
data[k] = temp[j--]; 7we='L&R
b = temp[j]; 6]!Jo)BF
} NSx-~)
} ] :](xW%
} ffOV7Dxy
rP(;^8l"
/** &ML-\aSal
* @param data FhEfW7]0,
* @param l Aba%QQQ
* @param i [w FK!?
*/ HR'F
private void insertSort(int[] data, int start, int len) { ~WmA55
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =':SOO7
} ob)c0Pz
} a}k5[)et
} oSR;Im<2
} y]k{u\2A
d(D|rf,av
堆排序： @&Af[X4s
)h%tEY$AJ
package org.rut.util.algorithm.support; ?O#"x{Pk
@zsqjm
import org.rut.util.algorithm.SortUtil; @# p{,L
[GW;RjPE
/** Qyj:!-o
* @author treeroot k#5Qwxu`
* @since 2006-2-2 z_$F)*PL
* @version 1.0 3qp\jh=FE
*/ jpiBHi]5+
public class HeapSort implements SortUtil.Sort{ SUoUXh^!w
Ez^wK~
/* (non-Javadoc) 40;4=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9iK%@k
*/ >\1j`/ :ZI
public void sort(int[] data) { #/>OW2Ny
MaxHeap h=new MaxHeap(); +39p5O!
h.init(data); bqZ5GKUo
for(int i=0;i h.remove(); _/}/1/y$Y
System.arraycopy(h.queue,1,data,0,data.length); #t&L}=G{%
} _GL:4
Gl>*e|}
private static class MaxHeap{ to] ~$~Q|>
GUvEOD=p
void init(int[] data){ h}GzQry1
this.queue=new int[data.length+1]; ]6?6 k4@
for(int i=0;i queue[++size]=data; =?1B|hdo
fixUp(size); AUm5$;o,/
} z dUSmb
} lMb&F[KJ7
U{&gV~
private int size=0; {60U6n
/E5>cqX4A
private int[] queue; /V E|FTs
5}'W8gV?
public int get() { z7]GZF
return queue[1]; FWQNO(
} S,qEKWyLd
9h0Y">}`b
public void remove() { d01]5'f?o
SortUtil.swap(queue,1,size--); \2y[Hy?
fixDown(1); D~t
} _G^Cc}X
file://fixdown .]K{8[:hq
private void fixDown(int k) { %bgUU|CdA
int j; =$F<Ac;&
while ((j = k << 1) <= size) { OCbwV7q:
if (j < size %26amp;%26amp; queue[j] j++; ?!$:I8T
if (queue[k]>queue[j]) file://不用交换 {*K7P>&
break; 6[&x7"
SortUtil.swap(queue,j,k); cPPTGpqw
k = j; }\aJ%9X02
} DAx1
} Q-y`IPtA<
private void fixUp(int k) { ]YKxJ''u
while (k > 1) { . MH;u3U
int j = k >> 1; d2X?^
if (queue[j]>queue[k]) 6l&,!fd
break; S0!w]Ku
SortUtil.swap(queue,j,k); Z6IWQo,)Rh
k = j; x5eSPF1
} V ^hR%*i'
} Jju^4
b-HELS`nX
} jUd)|v+t
&r1]A&
} X v$"B-j
E$USam
SortUtil： o8u;2gZx
y=SVS3D
package org.rut.util.algorithm; Tx|y!uHh
CRPE:7,D
import org.rut.util.algorithm.support.BubbleSort; W?D-&X^ny
import org.rut.util.algorithm.support.HeapSort; #;/ob-
import org.rut.util.algorithm.support.ImprovedMergeSort; c]R27r E
import org.rut.util.algorithm.support.ImprovedQuickSort; ~ ;ObT=
import org.rut.util.algorithm.support.InsertSort; K#xL-
import org.rut.util.algorithm.support.MergeSort; (ty&$
import org.rut.util.algorithm.support.QuickSort; qpV"ii
import org.rut.util.algorithm.support.SelectionSort; [Z;ei1l
import org.rut.util.algorithm.support.ShellSort; puox^
CI^s~M >
/** #M@~8dAH}M
* @author treeroot 2 :wgt
* @since 2006-2-2 +P%k@w#<Z
* @version 1.0 nB6 $*'
*/ BRXDE7vw
public class SortUtil { (h'Bz6K
public final static int INSERT = 1; cc0Tb
public final static int BUBBLE = 2; "<&) G{
public final static int SELECTION = 3; +`uNO<$~f
public final static int SHELL = 4; Lr0:yo
public final static int QUICK = 5; zJov*^T-C
public final static int IMPROVED_QUICK = 6; i(> WeC+
public final static int MERGE = 7; `N8t2yF
public final static int IMPROVED_MERGE = 8; 7QRkXs
public final static int HEAP = 9; fNz(z\
wlgR =l
public static void sort(int[] data) { {@hJPK8
sort(data, IMPROVED_QUICK); U7HfDDh
} zxkO&DGRbN
private static String[] name={ N9 h|_ax
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2}15FXgN
}; *Sps^Wl
X.ecA`0
private static Sort[] impl=new Sort[]{ 8*Ty`G&v
new InsertSort(), 8.Ufw. 5
new BubbleSort(), n'[>h0
new SelectionSort(), oRZe?h^r#
new ShellSort(), 3^5h:OaT
new QuickSort(), u~PZK.Uf0
new ImprovedQuickSort(), Iw?*y.z|
new MergeSort(), |K9*><P?)2
new ImprovedMergeSort(), M4(57b[`
new HeapSort() >>|47ps3
}; QseV\;z
}QBL{\E!
public static String toString(int algorithm){ NF7
return name[algorithm-1]; .5);W;`X
} m^ Epw4eg
6\k~q.U@XI
public static void sort(int[] data, int algorithm) { IwRP,MQ~
impl[algorithm-1].sort(data); 0!oqP1
} _>ZC;+c?
g)=$zXWhP
public static interface Sort { O p1TsRm5L
public void sort(int[] data); m#[9F']Z`
} P^!g0K
bR,Es~n
public static void swap(int[] data, int i, int j) { Y=?{TX=6<[
int temp = data; 'n=bQ"bQu
data = data[j]; ~!=Am:-wr
data[j] = temp; Bh'!aipk
} l(Dr@LB~
} \GQRpJ#h1