[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; K<|eZhp~
} n|^-qy'w
int i1=l; YR[Ii?
int i2=mid+1; ,L_p"A
for(int cur=l;cur<=r;cur++){ q+LjWZ+O
if(i1==mid+1) OjZ+gl}
data[cur]=temp[i2++]; v3aiX
else if(i2>r) Vwv O@G7A
data[cur]=temp[i1++]; :.sK:W("v
else if(temp[i1] data[cur]=temp[i1++]; X\YeO>C
else ]`UJwq
data[cur]=temp[i2++]; x{ZcF=4
} |t.WPp5,
} (>)Y0ki}
fh,Y#.V`
} 5Z;Py"%
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改进后的归并排序: "pHQ
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package org.rut.util.algorithm.support; G-} zkax
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import org.rut.util.algorithm.SortUtil; 6NZf!7,B
&G'R{s&"
/** VY![VnHsB
* @author treeroot ^{Mx?]z
* @since 2006-2-2 @];Xbbw+c
* @version 1.0 lz# inC|
*/ !0zM@p
public class ImprovedMergeSort implements SortUtil.Sort { @zPWu}&m
n287@Y4Ru
private static final int THRESHOLD = 10; &f!!UZMt)
~[,E i k
/* Q0M8}
* (non-Javadoc) tc# rL
* guf+AVPno
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @o>2:D1G
*/ $Y ]*v)}X
public void sort(int[] data) { qnT:x{o
int[] temp=new int[data.length]; NP|U |zn
mergeSort(data,temp,0,data.length-1); .0s/O
} 9^jO^[>
iF`E>%#
private void mergeSort(int[] data, int[] temp, int l, int r) { LfK <%(:
int i, j, k; e4?}#6RF
int mid = (l + r) / 2; z{AfR2L
if (l == r) 6:h!gY
return; 0ED(e1K#B
if ((mid - l) >= THRESHOLD) f#5mX&j
mergeSort(data, temp, l, mid); sg9ZYWcL
else Y.&z$+
insertSort(data, l, mid - l + 1); irrQ$N}
if ((r - mid) > THRESHOLD) f)gA.Rz
mergeSort(data, temp, mid + 1, r); sy]1Ba%
else zzPgLE55
insertSort(data, mid + 1, r - mid); ..n-&(c32
N-vr_4{g
for (i = l; i <= mid; i++) { #>!!#e!*
temp = data; EV~_-YC
} v|n.AGn
for (j = 1; j <= r - mid; j++) { OZ7MpQ
temp[r - j + 1] = data[j + mid]; U[Z1@2zLx
} #<l;YT8
int a = temp[l]; WI~';dK2]
int b = temp[r]; w`i3B@w
for (i = l, j = r, k = l; k <= r; k++) { |E!xt6B
if (a < b) { a:@Eg;aN*O
data[k] = temp[i++]; =k0l>)
a = temp; +fKLCzj
} else { o>j3<#?
data[k] = temp[j--]; #mtlgK'
b = temp[j]; vY.p~3q :)
} ~/gqXT">
} ;.m"y-
} 5)EnOT"'
~sk 4v:-
/** aIJ[K
* @param data a*??!
* @param l LoNz 1KJL
* @param i w'U;b
*/ O^`Y>>a
private void insertSort(int[] data, int start, int len) { $L;7SY?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 'p{>zQ\5
} 3D%I=p(
} H?O*
} m-ZVlj
} fq\E$'o$
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堆排序： Soq 'B?>
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package org.rut.util.algorithm.support; 5qUyOkI
c 8E&
import org.rut.util.algorithm.SortUtil; vE&
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/** ;Wb W\,P'
* @author treeroot t[0gN:s
* @since 2006-2-2 =y^N'1q
* @version 1.0 7FfzMs[\e
*/ /z~;.jRg
public class HeapSort implements SortUtil.Sort{ <BT}Tv9
N{oD1%
/* (non-Javadoc) $FCLo8/=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jf4D">h
*/ `"/@LUso
public void sort(int[] data) { "EHwv2Hm>
MaxHeap h=new MaxHeap(); oXb}6YC
h.init(data); [%YCupr#
for(int i=0;i h.remove(); o^5xCK:Oi2
System.arraycopy(h.queue,1,data,0,data.length); B ljZ&wZW
} yg/.=M
9G 9!=J
private static class MaxHeap{ qI KVu_
s_p?3bKu
void init(int[] data){ +*F ;l\R
this.queue=new int[data.length+1]; F&I^bkvh
for(int i=0;i queue[++size]=data; # l}Y1^PDd
fixUp(size); Y+j|T`d
} QnVYZUgJeV
} JAc-5e4
;R|5sCb/m
private int size=0; o3j4XrK
* UBU?
private int[] queue; 6|["!AUI
Z*x Q"+\
public int get() { i>>_S&!9p
return queue[1]; A"i40 @+
} XeJx/'9o{
mI?AI7DqK
public void remove() { 57rc|]C
SortUtil.swap(queue,1,size--); 2;U(r:]
fixDown(1); 53@*GXzE
} W 4~a`D7
file://fixdown n:Ka@
private void fixDown(int k) { 29 ')Y|$,
int j; Lk=f^qJ ]
while ((j = k << 1) <= size) { E*j)gj9
if (j < size %26amp;%26amp; queue[j] j++; n1!0KOu/N
if (queue[k]>queue[j]) file://不用交换 ')+'m1N
break; B]0`b1t
SortUtil.swap(queue,j,k); zc\e$MO
k = j; #tGW|F
} qeHb0G
} bp;b;f>
private void fixUp(int k) { eBBqF!WDb
while (k > 1) { mp>,TOi~s7
int j = k >> 1; qAHQZKk
if (queue[j]>queue[k]) >t3%-Kc
break; S0,p:Wey
SortUtil.swap(queue,j,k); b&s"x? 7
k = j; Wyw/imr
} D$!(Iae
} \:%e 6M
" :@5|4qK
} $yLsuqB}
cZPv6c_w
} DXsp 2
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SortUtil： #1&wfI$
;| )&aTdH
package org.rut.util.algorithm; nsuK{8}@
H Y\-sl^
import org.rut.util.algorithm.support.BubbleSort; S:+SZq
import org.rut.util.algorithm.support.HeapSort; }p]8'($
import org.rut.util.algorithm.support.ImprovedMergeSort; josc
import org.rut.util.algorithm.support.ImprovedQuickSort; MXq+aS{
import org.rut.util.algorithm.support.InsertSort; \l"1Io=
import org.rut.util.algorithm.support.MergeSort; e4j:IK>
import org.rut.util.algorithm.support.QuickSort; 9jCn|+
import org.rut.util.algorithm.support.SelectionSort; d[6[3B
import org.rut.util.algorithm.support.ShellSort; w0q.cj@nd
xOt%H\*k"
/** AKzhal!
* @author treeroot :Fm;0R@/k
* @since 2006-2-2 ofC=S$wX
* @version 1.0 'n6D3Vse
*/ -}AAA*P
public class SortUtil { GNgPf"}K
public final static int INSERT = 1; mr,IP=e~
public final static int BUBBLE = 2; Sbc
public final static int SELECTION = 3; /YKg.DA|
public final static int SHELL = 4; [daUtKz
public final static int QUICK = 5; q5p!Ty"
public final static int IMPROVED_QUICK = 6; rB}Iwp8
public final static int MERGE = 7; Lf4c[[@%gd
public final static int IMPROVED_MERGE = 8; [z'PdYQR/{
public final static int HEAP = 9; wi|'pKG
]N!8U_U3
public static void sort(int[] data) { G0Eqo$W)S
sort(data, IMPROVED_QUICK); o $7:*jU
} ifHQ2Ug9
private static String[] name={ #/=s74.b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q@1b{q#C5
}; rF'_YYpr>
8' M43n
private static Sort[] impl=new Sort[]{ ]DHB'NOh,
new InsertSort(), u!S^lV@
new BubbleSort(), ABuK`(f.
new SelectionSort(), U%.OH?;f
new ShellSort(), *UJ.cQ}
new QuickSort(), r#M0X^4A
new ImprovedQuickSort(), Y@)/iwq
new MergeSort(), 8E`A`z
new ImprovedMergeSort(), UFr ]$m&
new HeapSort() qRlS^=#
}; >> yK_yg
F%Oy4*4
public static String toString(int algorithm){ yr8 b?m.x
return name[algorithm-1]; (S3\O `5
} HRS^91aK
TmZsC5
public static void sort(int[] data, int algorithm) { |=&[sC
impl[algorithm-1].sort(data); j>Ce06G
} U$-Gc[=|
OHTJQ5%zL
public static interface Sort { JVy-Y
public void sort(int[] data); ~\B1\ G
} DyhW_PH2J
' 5`w5swbc
public static void swap(int[] data, int i, int j) { Ac{"$P`
int temp = data; jrJ!A(<)
data = data[j]; u*u3<YQ
data[j] = temp; 6b`3AAGU"
} eb&#sZ
} olda't