[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; 5kz)5,KjM
} Ez-[ )44/
int i1=l; 2]ape !(
int i2=mid+1; >cCR2j,r
for(int cur=l;cur<=r;cur++){ VH1d$
if(i1==mid+1) =>! Y{: y(
data[cur]=temp[i2++]; ]]wA[c~G
else if(i2>r) }B.H|*uO
data[cur]=temp[i1++]; 7?%k7f
else if(temp[i1] data[cur]=temp[i1++]; v*[.a#1^
else oGRhnP'PF+
data[cur]=temp[i2++]; M )2`+/4
} x HhN
} A,LuD.8
i?F >+
} v3jg~"!
$"H{4x`-
改进后的归并排序: E0?iXSJ
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package org.rut.util.algorithm.support; ut I"\1hQ
Aj4T"^fv
import org.rut.util.algorithm.SortUtil; gE?|_x#
?n ZY)
/** BFOq8}fX2
* @author treeroot jE/AA!DC#
* @since 2006-2-2 '4#}e[e
* @version 1.0 jYhB +|
*/ jWE:ek*
public class ImprovedMergeSort implements SortUtil.Sort { "UJ S5[7$
& J2M1z%
private static final int THRESHOLD = 10; cu/5$m?xx
9BuSN*4
/* ML>[^F
* (non-Javadoc) 8!Ww J Oe
* u[ Yk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6gs01c,BA
*/ |]X
public void sort(int[] data) { k<\$OoOZ
int[] temp=new int[data.length]; &E=>Hj(dTG
mergeSort(data,temp,0,data.length-1); SrK)t.oK
} 8{X"h#
vTx2E6
private void mergeSort(int[] data, int[] temp, int l, int r) { k-{<=>uM
int i, j, k; -xA2pYz"
int mid = (l + r) / 2; T]=r Co
if (l == r) Rw:*'1
return; HEM9E&rL
if ((mid - l) >= THRESHOLD) {R?U.eJW
mergeSort(data, temp, l, mid); tyqT
else ?pB>0b~3-
insertSort(data, l, mid - l + 1); 1jF`5k
if ((r - mid) > THRESHOLD) PU1Qsb5
mergeSort(data, temp, mid + 1, r); trp0V4b8
else [S>2ASj
insertSort(data, mid + 1, r - mid); AGYc |;
Ot6aRk
for (i = l; i <= mid; i++) { pv Gf\pu
temp = data; +y3%3EKs1~
} aN8|J?JH
for (j = 1; j <= r - mid; j++) { DuHu\>f<S
temp[r - j + 1] = data[j + mid]; %YC_Se7
} 1BpiV-]=
int a = temp[l]; [CXrSST")E
int b = temp[r]; ?3.b{Cq{-
for (i = l, j = r, k = l; k <= r; k++) { j?x>_#tIY
if (a < b) { ]33>m|?@
data[k] = temp[i++]; ?}U(3
a = temp; "\o+v|;
} else { -RvQB
data[k] = temp[j--]; In<n&ib
b = temp[j]; m~-K[+ya`D
} m1Mt#@,$
} 1R1z
} n' q4
]X ?7ZI^
/** GfmI<{da
* @param data ei[j1F
* @param l /*X2c6<d
* @param i zM(vr"U
*/ =aBctd:eX`
private void insertSort(int[] data, int start, int len) { ne_TIwfw-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t~#zMUfac
} yU-e3O7L
} sWc*5Rt
} \Yc'~2n
} 0,89H4
f>UXD
堆排序： E(8* pI
m;GbLncA
package org.rut.util.algorithm.support; 8)10o,#L
a@UZb
import org.rut.util.algorithm.SortUtil; ,l:ORoND
t7j);W%e6
/** +oovx2r&
* @author treeroot ~^r29'3
* @since 2006-2-2 ASk|A!
* @version 1.0 nwF2aRNV
*/ @c;|G$E@3
public class HeapSort implements SortUtil.Sort{ J:V6
{_ i\f ]L
/* (non-Javadoc) Kk-S}.E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G <i@ 5\#
*/ iiS-9>]/
public void sort(int[] data) { ECrex>zr%
MaxHeap h=new MaxHeap(); uP~@U"!
h.init(data); Vt".%d/`7
for(int i=0;i h.remove(); H?&Mbw d
System.arraycopy(h.queue,1,data,0,data.length); 3 I@}my1
} O06"bi5Y
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private static class MaxHeap{ lTV'J?8!-a
CkoLTY
void init(int[] data){ 2Q/4bJpd
this.queue=new int[data.length+1]; mUdOX7$c>
for(int i=0;i queue[++size]=data; QSszn`e
fixUp(size); pgQV/6
} 4GY[7^
} Rld!,t
y)W@{@{kl
private int size=0; %'s>QF]'
-y8`yHb_
private int[] queue; =E.t`x=
]%wVHC
public int get() { N`L0Vd
return queue[1]; =WyZX 7@R
} Z\ja
ebUBrxZX
public void remove() { 1p/3!1
SortUtil.swap(queue,1,size--); Z7hgA-t
fixDown(1); 7b;I+q
} $m].8?
file://fixdown 7Z\--=;|[:
private void fixDown(int k) { --%N8L;e
int j; kt["m.
while ((j = k << 1) <= size) { jY%na HaI
if (j < size %26amp;%26amp; queue[j] j++; K1\a#w
if (queue[k]>queue[j]) file://不用交换 @Z\,q's
break; ,!Z*5
SortUtil.swap(queue,j,k); DRp~jW(\y
k = j; 1DE<rKI
} 2.l Z:VLN
} ^Eb.:}!D6
private void fixUp(int k) { %S*{9hm/
while (k > 1) { <UV1!2nv*
int j = k >> 1; WaVtfg$!
if (queue[j]>queue[k]) V'8s8H
break; <SgM@0m
SortUtil.swap(queue,j,k); `_`QxM
k = j; VC\S'z
} \n8]M\<
} T|7}EAR=b
.<x&IJ /
} gv)P]{%^
j3{I /m
} )FF>IFHG
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SortUtil： j/r]wd"aUS
r? NznNVU
package org.rut.util.algorithm; =|3ek
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import org.rut.util.algorithm.support.BubbleSort; ]B%v+uaW
import org.rut.util.algorithm.support.HeapSort; Po__-xN>Q
import org.rut.util.algorithm.support.ImprovedMergeSort; kb{]>3Y"
import org.rut.util.algorithm.support.ImprovedQuickSort; %l}D.ml
import org.rut.util.algorithm.support.InsertSort; sk,ox~0R
import org.rut.util.algorithm.support.MergeSort; mpI5J'>]
import org.rut.util.algorithm.support.QuickSort; q)S^P>
import org.rut.util.algorithm.support.SelectionSort; {mZC$U'
import org.rut.util.algorithm.support.ShellSort; oX S1QT`B
gQxbi1!;9
/** ur$ _
* @author treeroot #fM#p+v
* @since 2006-2-2 xLNtIzx
* @version 1.0 E:JJ3X|
*/ %C~1^9uq
public class SortUtil { ypKUkH/
public final static int INSERT = 1; hbzC#@q
public final static int BUBBLE = 2; wKZ$iGMbz
public final static int SELECTION = 3; `\T]ej}zvI
public final static int SHELL = 4; 7\$qFF-y
public final static int QUICK = 5; 75"f2;
public final static int IMPROVED_QUICK = 6; -:2$ %
public final static int MERGE = 7; dJ2Hr;Lc
public final static int IMPROVED_MERGE = 8; >/kcdWl
public final static int HEAP = 9; 9[b<5Llt
Q[vJqkgT
public static void sort(int[] data) { wRcAX%n&
sort(data, IMPROVED_QUICK); CFzNwgv]z
} Rzbj
private static String[] name={ WQ[_hg|k
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "?ucO4d
}; !;i`PPRwk
Ox&P}P0f
private static Sort[] impl=new Sort[]{ -8:&>~4`
new InsertSort(), Ghx3EVqnx"
new BubbleSort(), E^ P,*s
new SelectionSort(), q|o}+Vr
new ShellSort(), xO^:_8=&:
new QuickSort(), =vQcYa
new ImprovedQuickSort(), HJXT9;w
new MergeSort(), !%^^\,
new ImprovedMergeSort(), z=rT%lz6
new HeapSort() # {w9s0:
}; P `}zlml
%QH)'GJQ
public static String toString(int algorithm){ |Y$uqRdV
return name[algorithm-1]; `x l
} <49K>S9O
3nT^?;-
public static void sort(int[] data, int algorithm) { 87<-kV
impl[algorithm-1].sort(data); $@^pAP
} K`iv c N"
i]Fp..`v~
public static interface Sort { Q1O}ly}JS
public void sort(int[] data); MBt9SXM
} ORyE`h
NO|KVZ~
public static void swap(int[] data, int i, int j) { iF-6Y0~8
int temp = data; u [m
data = data[j]; ,uo'c_f(e
data[j] = temp; U=DmsnD,
} A<5ZF27
} J7=+