[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; +p jB/#4
} J> ,w},`
int i1=l; /!t:MK;
int i2=mid+1; DxN\ H"
for(int cur=l;cur<=r;cur++){ $iy!:Did
if(i1==mid+1) y1}2hT0,
data[cur]=temp[i2++]; 80g}<Lwc
else if(i2>r) o(?9vU
data[cur]=temp[i1++]; 8mdVh\i!Kf
else if(temp[i1] data[cur]=temp[i1++]; UeZ(@6_:
else 9yTDuhJ6
data[cur]=temp[i2++]; Ho*B<#&(A|
} NCzabl
} @@\px66
HRbv%
} _!,2"dS
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改进后的归并排序: z ULHgG
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package org.rut.util.algorithm.support; |unvDXx-
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import org.rut.util.algorithm.SortUtil; VE*`Ji
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/** E'mT%@MOM
* @author treeroot }Ptv[{q]GE
* @since 2006-2-2 [hH>BEtm
* @version 1.0 $gYGnh_,Q
*/ kxyOe[7 S
public class ImprovedMergeSort implements SortUtil.Sort { 8tjWVo
bxL'k/Y$
private static final int THRESHOLD = 10; q^^R|X1
EFI!b60mc
/* gG.+3=
* (non-Javadoc) bYem0hzOe
* @C[p?ak
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) k^;/@:
*/ d^tY?*n
public void sort(int[] data) { n.NWS/v_{
int[] temp=new int[data.length]; r7}KV| M
mergeSort(data,temp,0,data.length-1); GJE+sqMX1
} Yg&/^
ZvC?F=tH
private void mergeSort(int[] data, int[] temp, int l, int r) { |cuKC \
int i, j, k; 0d:t=LKw)
int mid = (l + r) / 2; :wRfk*Ly
if (l == r) sD?Ynpt
return; %cDTq&Q
if ((mid - l) >= THRESHOLD) Si23w'T
mergeSort(data, temp, l, mid); 9)=bBQyr:
else Vx5fQ mx
insertSort(data, l, mid - l + 1); dikX_ Q>D
if ((r - mid) > THRESHOLD) "mU2^4q
mergeSort(data, temp, mid + 1, r); Q (gA:aQ
else (NfB+Ue}
insertSort(data, mid + 1, r - mid); iDgc$'%?
-R];tpddR5
for (i = l; i <= mid; i++) { G i(
temp = data; Cl&)#
} OaoHN& "
for (j = 1; j <= r - mid; j++) { *Ev8f11i&
temp[r - j + 1] = data[j + mid]; $JBb] v8_
} YB)I%5d;{
int a = temp[l]; M1 o@v0
int b = temp[r]; vF@|cTRR)
for (i = l, j = r, k = l; k <= r; k++) { 9Ou}8a?m"
if (a < b) { YFj#{C.
data[k] = temp[i++]; ;F%EW`7
a = temp; 5=9Eb
} else { >OjK0jiPf
data[k] = temp[j--]; ]JmE(Y1(1
b = temp[j]; Lq6nmjL
} '< >Q20
} x2b t^!t.
} Ag(JSVY
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/** +Qzl-eN/+
* @param data } 21!b :a
* @param l B 'd@ms
* @param i bng/v
*/ /=#~8
private void insertSort(int[] data, int start, int len) { &FZ~n?;hQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ) R5[aO
} 7NvRZ!
} |VyN>&r~6
} B'vIL'
} kxAT
U =g&c `
堆排序： 0d~?|Nv -
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package org.rut.util.algorithm.support; 5yV>-XT+-
G(F=6L~;
import org.rut.util.algorithm.SortUtil; G2>s#Y5(,
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/** 1guiuR4
* @author treeroot s{Y-Vdx
* @since 2006-2-2 fv* $=m
* @version 1.0 p>T
*/ |x _jpR
public class HeapSort implements SortUtil.Sort{ q!5`9u6
bG.`>
/* (non-Javadoc) K^b'<} $|p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {Rxb_9
*/ 7fT_]H8
public void sort(int[] data) { 8r0;054
MaxHeap h=new MaxHeap(); o9]!*Y!RA
h.init(data); j/ARTaO1]"
for(int i=0;i h.remove(); H2+Ijn19E
System.arraycopy(h.queue,1,data,0,data.length); ?AI`,*^
} brqmi<*9"[
6HVX4Z#VH
private static class MaxHeap{ 4~nf~
gKWUHlQY
void init(int[] data){ -"2%+S{
this.queue=new int[data.length+1]; t|UM2h
for(int i=0;i queue[++size]=data; n5fc_N/8O=
fixUp(size); nU2w\(3|
} K[9P{0hA
} {e[~1]j3
o> 1+m
private int size=0; [8WG
CX5>/
private int[] queue; A*]sN8
JRtDjZ4>
public int get() { z<.6jx@
return queue[1]; uSxldc
} \x8'K
Gch3|e
public void remove() { HMKogGTTo
SortUtil.swap(queue,1,size--); mGw*6kOIS
fixDown(1); >ca`0gu
} S1i~r+jf
file://fixdown @'J[T:e
private void fixDown(int k) { $JK,9G[Vu
int j; {k'$uW`
while ((j = k << 1) <= size) { N=!k2+
if (j < size %26amp;%26amp; queue[j] j++; T{'oR .g,
if (queue[k]>queue[j]) file://不用交换 G{a_\'7
break; G/1V4-@
SortUtil.swap(queue,j,k); yOk]RB<'r
k = j; vsB3n$2@u
} @]V_%,
} Orlf5{P
private void fixUp(int k) { ExOSHKU,e
while (k > 1) { Z?eedVV@
int j = k >> 1; 0o 8V8 :
if (queue[j]>queue[k]) 6D*x5L-1o
break; 9}G<\y
SortUtil.swap(queue,j,k); Qb86*
k = j; Ff[GR$m
} +xYg<AFS
} ]99;7
S'IQbHz*
} 'f7s*VKG
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} i)]^b{5nyB
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SortUtil： 07,&weQ
k& ]I;Aq
package org.rut.util.algorithm; rGQ([e
GM0pHmC
import org.rut.util.algorithm.support.BubbleSort; tRTJQ
import org.rut.util.algorithm.support.HeapSort; 0\o5+
import org.rut.util.algorithm.support.ImprovedMergeSort; qcBamf
import org.rut.util.algorithm.support.ImprovedQuickSort; AnBD~h h
import org.rut.util.algorithm.support.InsertSort; +3R/g@n
import org.rut.util.algorithm.support.MergeSort; _U~~[I
import org.rut.util.algorithm.support.QuickSort; u&o<>d;)
import org.rut.util.algorithm.support.SelectionSort; bI)%g
import org.rut.util.algorithm.support.ShellSort; lygv#s-T
q9$K.=_5
/** (^)(#CxO
* @author treeroot };>~P%u32
* @since 2006-2-2 'W p~8}i@
* @version 1.0 mbIHzzW>
*/ (+bt{Ma
public class SortUtil { %^;rYn3
public final static int INSERT = 1; *adwCiB
public final static int BUBBLE = 2; 9%?a\#C
public final static int SELECTION = 3; ,Q+.kAh !G
public final static int SHELL = 4; h,i=Y+1
public final static int QUICK = 5; 2)|G%f_lS
public final static int IMPROVED_QUICK = 6; Okd7ua-f
public final static int MERGE = 7; *UdP1?Y
public final static int IMPROVED_MERGE = 8; gt(!I^LHYc
public final static int HEAP = 9; Gmmh&Uj
[5MV$)"!j
public static void sort(int[] data) { [85tZr]
sort(data, IMPROVED_QUICK); Cuom_+wV&
} $69d9g8-(!
private static String[] name={ p!`S]\XEB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U1=\ `)u;
}; |u^~Z-.
:LTjV"f
private static Sort[] impl=new Sort[]{ B5#>ieM*
new InsertSort(), Y\9zjewc
new BubbleSort(), AaDMX,
new SelectionSort(), p{O@ts:
new ShellSort(), ~Z;.np(T
new QuickSort(), p3cb_
new ImprovedQuickSort(), 1Zgv+.
new MergeSort(), %Lfy!]Ru
new ImprovedMergeSort(), 34aSRFsk*
new HeapSort() j=PM]
}; <*HsJwr)u
Rs "#gT
public static String toString(int algorithm){ \{}5VVw-S?
return name[algorithm-1]; r]bG,?|
} #>">fs]
N/8B@}@n
public static void sort(int[] data, int algorithm) { Oa'T$'
impl[algorithm-1].sort(data); f2i9UZ$=e!
} "lBYn2W
T$o;PJc
public static interface Sort { /9 |BAQ:v;
public void sort(int[] data); s[u*~A
} 7vB6IF
vF'Y; M
public static void swap(int[] data, int i, int j) { D'"l%p
int temp = data; Ak@y"!wnM
data = data[j]; xc1-($Q,
data[j] = temp; u 236a\:
} 3^Z@fC
} R"O,2+@<.