[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/AP8
} );x[1*e
int i1=l; W{;LI WsZ
int i2=mid+1; d _koF-7
for(int cur=l;cur<=r;cur++){ fP1fm
if(i1==mid+1) `3F/7$q_
data[cur]=temp[i2++]; 9M-/{D^+<
else if(i2>r) sk`RaDq@;
data[cur]=temp[i1++]; rB5+~ K@
else if(temp[i1] data[cur]=temp[i1++]; -QP1Se*#
else u+e.{Z!
data[cur]=temp[i2++]; oRCD8b?
} ~bJ*LM?wOP
} gJBk&SDgtP
*yA.D?
} Bk~M^AK@~
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改进后的归并排序: 2E3x=
G{oM2`c'#8
package org.rut.util.algorithm.support; p&;,$KDA
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import org.rut.util.algorithm.SortUtil; J7rfHhz
cV)~%e/
/** &]/.=J
* @author treeroot <3Hu(Jx<O
* @since 2006-2-2 iD9hqiX&
* @version 1.0 MMUw+jM4
*/ #Y<b'7yJ
public class ImprovedMergeSort implements SortUtil.Sort { JTB5#S4W
}L*cP;m#
private static final int THRESHOLD = 10; KHXnB
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/* u@zBE? g
* (non-Javadoc) r7p>`>_Q\
* zL3'',Ha
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) doaqHri\,
*/ tt>=Vt'
public void sort(int[] data) { meV RdQ
int[] temp=new int[data.length]; _26F[R1><~
mergeSort(data,temp,0,data.length-1); ktKT=(F&
} hC=="4 -
Ok~\
private void mergeSort(int[] data, int[] temp, int l, int r) { zHCz[jlrMq
int i, j, k; U=bZy,FT$
int mid = (l + r) / 2; 7e&%R4{b
if (l == r) v<Ux+-
return; [t`QV2um
if ((mid - l) >= THRESHOLD) [VP~~*b
mergeSort(data, temp, l, mid); 3^zOG2
else %@FTg$
insertSort(data, l, mid - l + 1); VIxcyp0X
if ((r - mid) > THRESHOLD) bx<7@
mergeSort(data, temp, mid + 1, r); vd<" G}
else C zvi':
insertSort(data, mid + 1, r - mid); 07+Qai-]
<kmn3w,vi
for (i = l; i <= mid; i++) { w~g)Dz2G
temp = data; "L" 6jT
} ;=6~,k)
for (j = 1; j <= r - mid; j++) { 3J}bI{3
temp[r - j + 1] = data[j + mid]; up7]Yy;o=
} L1k_AC1.M
int a = temp[l]; <[7.+{qfW
int b = temp[r]; f"5vpU^5*
for (i = l, j = r, k = l; k <= r; k++) { [nlW}1)46
if (a < b) { YX_p3
data[k] = temp[i++]; X^H)2G>e
a = temp; Dl%NVi+n
} else { Pw'3ya8
data[k] = temp[j--]; `=Hh5;ep
b = temp[j]; ]n0kO&
} qIa|sV\w0
} b/ h,qv
} S,EXc^A7
`itaQGLD
/** 0}k[s+^
* @param data ig]*Z
* @param l 7$+n"Cfm
* @param i 'Uew(o
*/ (CS"s+y1
private void insertSort(int[] data, int start, int len) { &""~Pn8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K.n #;|
} L{;q^
} qCn(~:
} I3D8xl>P\
} q4PRc<\^
hVI $r
堆排序： Y(ly0U}
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package org.rut.util.algorithm.support; @!&\Z[",
\aQBzEX
import org.rut.util.algorithm.SortUtil; ]L%qfy4
Q2iS0#
/** aHe/MucK
* @author treeroot lqa.Nj
* @since 2006-2-2 a-,!K
* @version 1.0 !-%i" a
*/ +Cl(:kfYB
public class HeapSort implements SortUtil.Sort{ 4r`u@
l2U"4d!o
/* (non-Javadoc) 1g5%Gr/0$5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'H<?K
*/ i2A>T/?{
public void sort(int[] data) { g= k}6"F~
MaxHeap h=new MaxHeap(); a;D{P`%n
h.init(data); ~sshhuF
for(int i=0;i h.remove(); /cUcfe#X
System.arraycopy(h.queue,1,data,0,data.length); (X@JlAfB
} mdR:XuRD"t
|S|0'C*
private static class MaxHeap{ ~T9%%W[
R$4&>VBu
void init(int[] data){ E$; =*0w
this.queue=new int[data.length+1]; oJbD|m
for(int i=0;i queue[++size]=data; wIz<Y{HA=
fixUp(size); .a1WwI
} P Ig)h-w?
} _ro^<V$%
8Br*
private int size=0; ;?1H&
UP}Ys*
private int[] queue; <Vm+Lt9
2?58=i%b
public int get() { tzJdUZJ
return queue[1]; \,i9m9;y
} aG}ju;
: I28Zi*
public void remove() { ao#{N=mn
SortUtil.swap(queue,1,size--); s\,F6c
fixDown(1); gEbe6!; q3
} a H'iW)
file://fixdown QpwOrxI}
private void fixDown(int k) { t/LQ|/xo
int j; fGHYs
while ((j = k << 1) <= size) { oE[wOq+
if (j < size %26amp;%26amp; queue[j] j++; j<>E Fd
if (queue[k]>queue[j]) file://不用交换 #ok1qT9_
break; A&rk5y;
SortUtil.swap(queue,j,k); O7%<(
k = j; &duWV6Acw
} XYhN;U}Z
} at]=SA
private void fixUp(int k) { >{p&_u.r-
while (k > 1) { mk8xNpk B
int j = k >> 1; }&Un8Rg"h
if (queue[j]>queue[k]) G < Z)y#
break; bO>q`%&
SortUtil.swap(queue,j,k); trcG^uV
k = j; Q{T6t;eH
} 7T9m@
} MWl?pG!Y
[X]yj
} IL`X}=L_
G?CaCleG
} q,3_)ZOq
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SortUtil： '=K [3%U
bhDV U(%I6
package org.rut.util.algorithm; ma[%,u`
O*xC}$OOn
import org.rut.util.algorithm.support.BubbleSort; .|iMKRq
import org.rut.util.algorithm.support.HeapSort; iZ %KHqG
import org.rut.util.algorithm.support.ImprovedMergeSort; "{1`~pDj?
import org.rut.util.algorithm.support.ImprovedQuickSort; 8TGO6oY+=
import org.rut.util.algorithm.support.InsertSort; VTQ V]>|
import org.rut.util.algorithm.support.MergeSort; UjxEbk5>^
import org.rut.util.algorithm.support.QuickSort; NFw7g&1;Kp
import org.rut.util.algorithm.support.SelectionSort; cih@:=Qy
import org.rut.util.algorithm.support.ShellSort; a~E@scD
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/** NC'+-P'y
* @author treeroot 'NHtCs=F
* @since 2006-2-2 nXPl\|pXt
* @version 1.0 IV*@}~BJ
*/ nf=*KS\v
public class SortUtil { 9o5W\.A7[D
public final static int INSERT = 1; %Z9&zmO
public final static int BUBBLE = 2; .'N:]G@!
public final static int SELECTION = 3; =lY6v-MBw
public final static int SHELL = 4; BH6)`0&2*N
public final static int QUICK = 5; t&}Z~Zp
public final static int IMPROVED_QUICK = 6; gsFyZ
public final static int MERGE = 7; Tlc3l}B*Z
public final static int IMPROVED_MERGE = 8; CZ*#FY
public final static int HEAP = 9; Agt6G\n
&J(+XJM%
public static void sort(int[] data) { 6/_] |4t
sort(data, IMPROVED_QUICK); IX@g].)C
} "~-H]9
private static String[] name={ QP/%+[E.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 6Y?%G>$6
}; @a-u_|3q
(1pI#H"f9
private static Sort[] impl=new Sort[]{ \1|]?ZQ\K
new InsertSort(), OiBDI3,|+
new BubbleSort(), x?s5vxAKf
new SelectionSort(), CR8a)X4j#
new ShellSort(), .x\fPjB
new QuickSort(), +6paM
new ImprovedQuickSort(), -+MGs]),
new MergeSort(), dQP7CP
new ImprovedMergeSort(), }?[^q
new HeapSort() 74f3a|vx/
}; 0-Z sV3I&
)Dn~e#
public static String toString(int algorithm){ V)x(\ls]SX
return name[algorithm-1]; qkQ_#
} E.~;
a(Q4*XH4
public static void sort(int[] data, int algorithm) { T.ZPpxY
impl[algorithm-1].sort(data); ">pW:apl%
} BCnf'0q
F>N3GPRl
public static interface Sort { &G63ReW7 @
public void sort(int[] data); "s-e)svB
} <3?T^/8
Ce&nMgd~
public static void swap(int[] data, int i, int j) { o=/Cje
int temp = data; Twqkd8[
data = data[j]; ! C}t)R]^
data[j] = temp; Qdepzo>E
} m ,B,dqT
} iV+'p->/