[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; u>JqFw1
} e);bF>.~
int i1=l; 1\M"`L/
int i2=mid+1; ,Zf :R
for(int cur=l;cur<=r;cur++){ Y*]l|)a6_]
if(i1==mid+1) =U)n`#6_j2
data[cur]=temp[i2++]; >u'/$k
else if(i2>r) >#Grf)@"6
data[cur]=temp[i1++]; azz#@f1
else if(temp[i1] data[cur]=temp[i1++]; 5<'n
else |JirBz
data[cur]=temp[i2++]; DQL06`pX/
} KIXwx98
} Dx p>
}rFsU\]:q
} i{%z
?,A}E|jZ
改进后的归并排序: I{i:B
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package org.rut.util.algorithm.support; bCJ<=X,g`K
~(w=U *
import org.rut.util.algorithm.SortUtil; 1]a*Oer}
_OyP>|L'
/** +9=@E
* @author treeroot 5`OK-
* @since 2006-2-2 ;EE{~
* @version 1.0 |SSfG~r
*/ jQH5$
public class ImprovedMergeSort implements SortUtil.Sort { [R@q]S/
x= vE&9_u
private static final int THRESHOLD = 10; ,}xpYq_/
f4 Sw,A
/* 1FXzAc(c!
* (non-Javadoc) XcJ'm{=
* ,6cbD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J pCZq #
*/ KxgR5#:i"
public void sort(int[] data) { ~/]\iOL
int[] temp=new int[data.length]; GlV-}5W
mergeSort(data,temp,0,data.length-1); ;%b <uV
} FrAqTz
eNlF2M
private void mergeSort(int[] data, int[] temp, int l, int r) { g:uaI
int i, j, k; ctwhfS|Y0
int mid = (l + r) / 2; goBKr: &]w
if (l == r) @+T{M:&l
return; 2F*Dkv
if ((mid - l) >= THRESHOLD) g-{<v4NGI
mergeSort(data, temp, l, mid); Aoy1<8WP%
else .zSimEOF
insertSort(data, l, mid - l + 1); s[{:>~{iq
if ((r - mid) > THRESHOLD) -x3tx7%
mergeSort(data, temp, mid + 1, r); "p6:ekw
else 6qHvq A,
insertSort(data, mid + 1, r - mid); Y9I #Q
1o5Y9#7
for (i = l; i <= mid; i++) { sg9x?Bx9
temp = data; 21)-:rS
} ^8f|clw"
for (j = 1; j <= r - mid; j++) { edImrm1f
temp[r - j + 1] = data[j + mid]; 99+/W*C
} R;Gl{
int a = temp[l]; `|ck5DZT5L
int b = temp[r]; 6S+K*/w
for (i = l, j = r, k = l; k <= r; k++) { oE|u;o
if (a < b) { X{9JSq
data[k] = temp[i++]; 4E>/*F!
a = temp; C^8)IN=$
} else { U d=gdsL
data[k] = temp[j--]; 3 DO$^JJ.
b = temp[j]; 1>*UbV<R;u
} 0[$Mo3c+'
} rz%[o,s
} 0D]Yz`n3
!Sy'Z6%f
/** YCLD!S/?
* @param data Z%HEn$t
* @param l lJz?QI1
* @param i "DcueU#!
*/ < 4EB|@E
private void insertSort(int[] data, int start, int len) { *F%ol;|Q
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &:e}4/G
} D0E"YEo\nv
} ]`i@~Z h\
} 2'UFHiK
} @qr3v>3X<
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堆排序： _.J[w6
,j(p}t
package org.rut.util.algorithm.support; luxKgcU
3{#pd6e5
import org.rut.util.algorithm.SortUtil; $M3A+6["H
)zc8bS
/** GYb2m"a)
* @author treeroot (=3&8$
* @since 2006-2-2 xfF&$K"
* @version 1.0 X%R^)zKV
*/ Qig!NgOM
public class HeapSort implements SortUtil.Sort{ {'K;aJ'\
=R24h
/* (non-Javadoc) w2C!>fJ]1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mpl,}Q!c
*/ ]JCB^)tM
public void sort(int[] data) { c7TWAG_+
MaxHeap h=new MaxHeap(); ZX5A%`<M
h.init(data); [,szx1
for(int i=0;i h.remove(); t[yD8h
System.arraycopy(h.queue,1,data,0,data.length); ;x0KaFk
} ka9v2tE\
U=cWvr65
private static class MaxHeap{ )}9}"jrDlx
3=L1HZH
void init(int[] data){ F>_lp,G
this.queue=new int[data.length+1]; E#X!*q&
for(int i=0;i queue[++size]=data; WSB|-Qj}W
fixUp(size); t-|=weNy
} 'JKvy(n>
} u1|Y;*
2T2#HP
private int size=0; WZ V*J&
.=w`T #L
private int[] queue; ]H9HO2wGQ
4.kkxQR7r
public int get() { )yH#*~X_
return queue[1]; UmI@":|-
} sbiDnRf
rJ~(Xu>,s
public void remove() { T9;o.f S
SortUtil.swap(queue,1,size--); E|A_|FS&%
fixDown(1); }m lbN0v
} "BNmpP
file://fixdown #FDu4xi
private void fixDown(int k) { 1sJJ"dC.w
int j; ?(L?X&)v
while ((j = k << 1) <= size) { Dlsa(
if (j < size %26amp;%26amp; queue[j] j++; e$+? v2.
if (queue[k]>queue[j]) file://不用交换 :Y?08/V
break; :7;Iy u
SortUtil.swap(queue,j,k); d_|v=^;
k = j; ]{,=mOk
} ~hw4gdtS
} 4a-F4j'
private void fixUp(int k) { e5\1k#@
while (k > 1) { #Q)w$WR
int j = k >> 1; M@z/gy^
if (queue[j]>queue[k]) Hx/Vm`pRyX
break; g_!xO2LH,8
SortUtil.swap(queue,j,k); }8KL]11b
k = j; !-o||rt
} &CsBG?@Z|
} R =c
#^[N4uV
} 6h*bcb#C
J3JRWy@?P
} iQj{J1V
jQlK-U=oi
SortUtil： rG%_O$_dO
SmEd'YD!J
package org.rut.util.algorithm; pq5H{
CxN@g'
import org.rut.util.algorithm.support.BubbleSort; rpI7W?hh
import org.rut.util.algorithm.support.HeapSort; 2Yf;b9-k
import org.rut.util.algorithm.support.ImprovedMergeSort; %+JTQy
import org.rut.util.algorithm.support.ImprovedQuickSort; X)+sHcE~#
import org.rut.util.algorithm.support.InsertSort; [5:7WqB
import org.rut.util.algorithm.support.MergeSort; @wZ_VE7B
import org.rut.util.algorithm.support.QuickSort; Gjh7cm>
import org.rut.util.algorithm.support.SelectionSort; `^h##WaXap
import org.rut.util.algorithm.support.ShellSort; @G{DOxE*
|#kf.kN
/** gV>\lMc[-%
* @author treeroot ~Q\ZDMTK
* @since 2006-2-2 +~AI(h
* @version 1.0 'bO? =+c
*/ 8LKZ3Y|
public class SortUtil { lLf01sa4
public final static int INSERT = 1; ]/naH#8G
public final static int BUBBLE = 2; J}u1\Id%
public final static int SELECTION = 3; \ku{-^7
public final static int SHELL = 4; AlhiF\+ C
public final static int QUICK = 5; ZDD|MH
public final static int IMPROVED_QUICK = 6; 3"%44'
public final static int MERGE = 7; xeh|u"5
public final static int IMPROVED_MERGE = 8; TzXl ?N
public final static int HEAP = 9; vwD(J.;
DKCy h`
public static void sort(int[] data) { h--!pE+
sort(data, IMPROVED_QUICK); R;ug+N
} gJv^v`X
private static String[] name={ )ciHY6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pLcng[
}; _n gMC]-T
nuA!Jln_
private static Sort[] impl=new Sort[]{ J#WPXE+Ds
new InsertSort(), ,i.P= o
new BubbleSort(), 5!%/j,?
new SelectionSort(), C#0Wo
new ShellSort(), '2#fkH[.
new QuickSort(), >>xV-1h:
new ImprovedQuickSort(), *(IO<KAg8
new MergeSort(), " <AljgF
new ImprovedMergeSort(), FeMu`|2
new HeapSort() A*i_-;W)
}; FZ/&[;E!
;OyM~T gI
public static String toString(int algorithm){ sva$@y7b
return name[algorithm-1]; \2b9A'd>
} Ut=y`]F
a{,t@G
public static void sort(int[] data, int algorithm) { @jeV[N,0
impl[algorithm-1].sort(data); xFnMXht
} F,:VL*.5kJ
sl 5wX
public static interface Sort { +w5?{J
public void sort(int[] data); 2>s;xZ@/'R
} ugP R)tDfM
?[">%^
public static void swap(int[] data, int i, int j) { 4 XQ?By
int temp = data; U7=Z.*/62
data = data[j]; _Pal)re]U
data[j] = temp; ,{at?y*
} jd*H$BU^
} w{IqzmPiH