[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; qK a}O*
} )pH+ibR
int i1=l; 1j$\ 48Z
int i2=mid+1; ]a4U\yr
for(int cur=l;cur<=r;cur++){ ^obuMQ;
if(i1==mid+1) Lj3o-@\*j
data[cur]=temp[i2++]; x/umwT,ov
else if(i2>r) >\Dy
data[cur]=temp[i1++]; &.,K@OFE}
else if(temp[i1] data[cur]=temp[i1++]; A/>Q5)
else N s+g9+<A
data[cur]=temp[i2++]; ;Zd_2CZ
} qT@h/Y
} ^ ~Eh+
e{5?+6KH
} 4w^o !
sQa;l]O:NC
改进后的归并排序: ^m w]u"5\
Hw]E#S
package org.rut.util.algorithm.support; ;7lON-@BI
|6*Bu1
import org.rut.util.algorithm.SortUtil; TVD~Ix
'RMUjJ-!
/** =\oH= f
* @author treeroot &J6`Q<U!
* @since 2006-2-2 MjMDD
* @version 1.0 ^HSxE
*/ bQt:=>
public class ImprovedMergeSort implements SortUtil.Sort { @'R)$:I%L
]nhh|q9r{
private static final int THRESHOLD = 10; N `|A
EL?(D
/* *p}mn#ru-
* (non-Javadoc) R |c=I}@F
* DXiA4ihr=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JN0h3nZ_
*/ 1Z# $X`
public void sort(int[] data) { hC<ROD
int[] temp=new int[data.length]; d05xn7%!{
mergeSort(data,temp,0,data.length-1); jSY[Y:6md
} Zhq_ pus"a
P8d
private void mergeSort(int[] data, int[] temp, int l, int r) { ,&hv x
int i, j, k; ,9P-<P
int mid = (l + r) / 2; rOSov"7
if (l == r) }>xwiSF?
return; "I.6/9
if ((mid - l) >= THRESHOLD) 9F/I",EA
mergeSort(data, temp, l, mid); =}`d
else +:FXtO>n"
insertSort(data, l, mid - l + 1); 2Vx4"fHP#N
if ((r - mid) > THRESHOLD) b>07t!;
mergeSort(data, temp, mid + 1, r); <Vhd4c
else {*yvvb
insertSort(data, mid + 1, r - mid); hd)Jq'MCS
F9r.DG$}
for (i = l; i <= mid; i++) { X1^VdJE
temp = data; (T%F^s5D
} cJo%j -AM
for (j = 1; j <= r - mid; j++) { OIblBQ!
temp[r - j + 1] = data[j + mid]; h*S"]ye5
} $Rm~ VwY#
int a = temp[l]; tu -a`h_NJ
int b = temp[r]; *S;}&VAZ
for (i = l, j = r, k = l; k <= r; k++) { /q9I^ztV
if (a < b) { @>8(f#S%
data[k] = temp[i++]; ,!:c6F+
a = temp; @;/Pl>$|'G
} else { hi8q?4jE
data[k] = temp[j--]; W:r[o%B
b = temp[j]; <o(;~
} C>Ik ;
} S2$E`' J
} !M~:#k
,?GwA@~$k:
/** [DaAvN^0A
* @param data fCY|iO0.t
* @param l N^;lp<{6?
* @param i gT)(RS`_)
*/ uKJ:)oyaCP
private void insertSort(int[] data, int start, int len) { Ic/hVKYG5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); SyL"Bmi
} 9)!Ksg(h
} KXPCkNIN!
} UFB|IeX?q
} )PN8HJAArh
v`S5[{6
堆排序： TK5$-6k
4&*lpl*N
package org.rut.util.algorithm.support; FWW4n_74
:,8y8z$+
import org.rut.util.algorithm.SortUtil; KMhrw s{&B
Q6 *n'6
/** | R,dsBd
* @author treeroot 4!!|P
* @since 2006-2-2 2"6L\8hd2
* @version 1.0 &GH[$(
*/ }u^bTR?3
public class HeapSort implements SortUtil.Sort{ A[P7hMn
yCjc5d|tT
/* (non-Javadoc) AH,?B*zGj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 30h[&Oc
*/ Ec7xwPk
public void sort(int[] data) { lO@-*m$
MaxHeap h=new MaxHeap(); dX?j/M-
h.init(data); 2^XmtT
for(int i=0;i h.remove(); NZGO8u
System.arraycopy(h.queue,1,data,0,data.length); kH 9k<{
} 7] y3<t
S1r{2s&
private static class MaxHeap{ Gb^63.}
)QAYjW!Z
void init(int[] data){ xbiprhdv
this.queue=new int[data.length+1]; tN{0C/B9
for(int i=0;i queue[++size]=data; 2?,lr2
fixUp(size); hTBJ\1 -
} q;SD+%tI
} [)`*k#.=
rbf5~sw&8+
private int size=0; 6Emn@Mn=
k2Q[v
private int[] queue; n l5+#e*\
puOMtCI
public int get() { MKtI3vi?
return queue[1]; 3g7]$}
} ceg\lE:8
z{R Mb
public void remove() { Z@q1&}D!
SortUtil.swap(queue,1,size--); 0,0WdJAe
fixDown(1); e\z,^
} I>MLI=[Kg
file://fixdown [?z;'O}y
private void fixDown(int k) { bP:u`!p -i
int j; e,XT(KY
while ((j = k << 1) <= size) { ~&/Nl_#
if (j < size %26amp;%26amp; queue[j] j++; (fc_V[(m"
if (queue[k]>queue[j]) file://不用交换 ;4+z~7Je]^
break; o5],c9R9b
SortUtil.swap(queue,j,k); hj=n;,a9
k = j; 1sUgjyGQ
} %4VM"C4[
} .t^1e
private void fixUp(int k) { YloE4PAY7
while (k > 1) { +fvVora
int j = k >> 1; CS%ut-K<5M
if (queue[j]>queue[k]) i{g~u<DH)Q
break; dnANlNMk?
SortUtil.swap(queue,j,k); 9Eh*r@>
k = j; VU\G49
} *`s*l+0b
} 1%@i4
;&b=>kPlZ
} a;i}<n7
o &b\bK%E
} ]_>38f7h
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SortUtil： h\C1:0x{
R]Fa?uQW
package org.rut.util.algorithm; s$^ 2Cuhv
_)CCD33$
import org.rut.util.algorithm.support.BubbleSort; Nj;(QhYZ
import org.rut.util.algorithm.support.HeapSort; L#Ve[
import org.rut.util.algorithm.support.ImprovedMergeSort; }Ej^"T:H_;
import org.rut.util.algorithm.support.ImprovedQuickSort; lz).=N}m
import org.rut.util.algorithm.support.InsertSort; 7vqE@;:dt
import org.rut.util.algorithm.support.MergeSort; +5ql`C
import org.rut.util.algorithm.support.QuickSort; =+e;BYD#!
import org.rut.util.algorithm.support.SelectionSort; uL-$^],
import org.rut.util.algorithm.support.ShellSort; V" 5rIk
+SFo2Wdr43
/** rp-.\Hl/a
* @author treeroot Zf)<)o*
* @since 2006-2-2 FOa2VP%
* @version 1.0 O|;|7fCB\
*/ Dk~ JH9#
public class SortUtil { `?N|{kb
public final static int INSERT = 1; yX\~{%
public final static int BUBBLE = 2; r^d:Po
public final static int SELECTION = 3; ~\R+p~>
public final static int SHELL = 4; !O,`Z`T?
public final static int QUICK = 5; %yy|B
public final static int IMPROVED_QUICK = 6; \p izVt
public final static int MERGE = 7; 7*&q"
public final static int IMPROVED_MERGE = 8; EU7mP MxJ
public final static int HEAP = 9; ECOzquvM
XQ k,xQ
public static void sort(int[] data) { &-.2P!t
sort(data, IMPROVED_QUICK); $8_b[~%2
} 7baQ4QY?n
private static String[] name={ 9H%L;C5<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2)`4(38
}; 6$+F5T
3}?]G8iL?L
private static Sort[] impl=new Sort[]{ z!9w Lo^r
new InsertSort(), gDsb~>rb|
new BubbleSort(), ;x=0+0JD
new SelectionSort(), vB/G#\Zqz
new ShellSort(), a/ Z\h{*
new QuickSort(), #c1c%27cmm
new ImprovedQuickSort(), f,Dj@?3+
new MergeSort(), i\k>2df
new ImprovedMergeSort(), &FzZpH
new HeapSort() ]OA8H[U-eA
}; %,5_]bGvb
.{#J2}+[_}
public static String toString(int algorithm){ TqXB2`7Ri
return name[algorithm-1]; RS[QZOoW}
} n#5%{e>
m:{IVvN_
public static void sort(int[] data, int algorithm) { &Ukh
impl[algorithm-1].sort(data); h.h\)>DM@
} #ANbhHG
|`6*~ciUV
public static interface Sort { LZ#SX5N
public void sort(int[] data); DlbNW& V
} 4Q(GX.5
8d"Ff
public static void swap(int[] data, int i, int j) { z0-`D.D@\
int temp = data; ^NiS7)FX
data = data[j]; b$1W>
data[j] = temp; LYyOcb[x
} -eoXaP{[
} ]eZrb%B.