[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; xpk|?/6
} {;zPW!G
int i1=l; k y98/6
int i2=mid+1; c>SeOnf
for(int cur=l;cur<=r;cur++){ ;GAYcVB
if(i1==mid+1) 2$91+N*w9
data[cur]=temp[i2++]; 1rEP)66N
else if(i2>r) +9X[gef8
data[cur]=temp[i1++]; AL0Rn e N
else if(temp[i1] data[cur]=temp[i1++]; Fk(5y)
else [;I8ZVE
data[cur]=temp[i2++]; gg(U}L ]:
} #<o#kJL
} ht|r+v-
>`:+d'Jv0
} 63HkN4D4
{E/TC%
改进后的归并排序: ob{pQx7
^XM;D/Gp~
package org.rut.util.algorithm.support; ]`prDw'
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import org.rut.util.algorithm.SortUtil; Q Y'-]
lu_Gr=#O
/** 5o/rV.I
* @author treeroot : [y(<TLw
* @since 2006-2-2 m"R(_E5
* @version 1.0 g8Z14'Ke
*/ 8##jd[o&p~
public class ImprovedMergeSort implements SortUtil.Sort { ^U}0D^jDeE
o[#a}5Y
private static final int THRESHOLD = 10; z"3c+?2
(zBQ^97]
/* ={^#E?
* (non-Javadoc) oK6lCGM5
* tOw 0(-:iq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S2)S/ nf
*/ _LNPB$P
public void sort(int[] data) { %j@FZ )a[
int[] temp=new int[data.length]; ^&iV%vQ[
mergeSort(data,temp,0,data.length-1); jvQ"cs$.
} }H=OVbQor
">3@<f>
private void mergeSort(int[] data, int[] temp, int l, int r) { +0Gep}&z.
int i, j, k; Kcl$|T
int mid = (l + r) / 2; a"}#HvB+
if (l == r) AX+d?M
return; ''uI+>Y
if ((mid - l) >= THRESHOLD) ~\ f^L?m
mergeSort(data, temp, l, mid); UsN b&aue
else i1\2lh$
insertSort(data, l, mid - l + 1); BvF_9
if ((r - mid) > THRESHOLD) #=(op?]
mergeSort(data, temp, mid + 1, r); Ef.4.iDJrR
else fXe-U='
insertSort(data, mid + 1, r - mid); ak`)>
"N]o5d
for (i = l; i <= mid; i++) { wVDB?gy%#
temp = data; : qRT9n$
} P~e$iBH'
for (j = 1; j <= r - mid; j++) { dU6LB+A
temp[r - j + 1] = data[j + mid]; LltguNM$
} pm\X*t}L
int a = temp[l]; }eM<A$J
int b = temp[r]; or}*tSKX
for (i = l, j = r, k = l; k <= r; k++) { de9l;zF
if (a < b) { |`wsKr'
data[k] = temp[i++]; 7-I>53@
a = temp; j_@3a)[NY
} else { K/`RZ!
data[k] = temp[j--]; z :v, Vu
b = temp[j]; vLv@Mo
} OL5HofgNm
} )H)Udhz
} 9^ p{/Io
|+-i'N9
/** % Au$E&sj
* @param data aa8Qslm
* @param l bK\WdG\;
* @param i yPYJc
*/ ?4e6w
private void insertSort(int[] data, int start, int len) { #Hi]&)p_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @BUqQ9q:
} AijTT%
} $?AA"Nz
} A(OfG&!
} }Xj_Y]T
d~-p;i
堆排序： *)1Vs'!-
'%C.([
package org.rut.util.algorithm.support; 4UjE*Aq
g)qnjeSs]
import org.rut.util.algorithm.SortUtil; ^85n9a?8
8zDH<Gb
/** ApYud?0b
* @author treeroot x ;,xd
* @since 2006-2-2 FLI8r:
* @version 1.0 p''"E$B/(
*/ +\GZ(!~
public class HeapSort implements SortUtil.Sort{ lk1Gs{(qhH
@B[Cc`IN"
/* (non-Javadoc) l/zC##1+.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ) Zo_6%
*/ 9,f<Nb(\
public void sort(int[] data) { 7G(f1Y
MaxHeap h=new MaxHeap(); V}fKV6 v9
h.init(data); > ' 0 ][~
for(int i=0;i h.remove(); 6h6?BQSE
System.arraycopy(h.queue,1,data,0,data.length); F(9 Y/UXH
} .*-w UBr
_iJXp0g
private static class MaxHeap{ :dIQV(iW
'z}M[h K]
void init(int[] data){ 68<Z\WP
this.queue=new int[data.length+1]; =yX&p:-&
for(int i=0;i queue[++size]=data; r>~d[,^$m4
fixUp(size); V!77YFen %
} Y%:0|utQC
} in#]3QGV
m+2`"1IE[
private int size=0; 4bev*[k
aT:AxYn8
private int[] queue; Yz-JI=
Fra>|;do
public int get() { xX/s1(P
return queue[1]; IAF;mv}'
} Secq^#]8
xVkTRCh
public void remove() { 5 k%9>U%$
SortUtil.swap(queue,1,size--); S=H_9io
fixDown(1); =lC;^&D-0/
} hMeqs+
file://fixdown h@;)dLo0z
private void fixDown(int k) { 1i/::4=
int j; nt0\q'&
while ((j = k << 1) <= size) { T<+ht8&M8
if (j < size %26amp;%26amp; queue[j] j++; I+"?,Ej$K
if (queue[k]>queue[j]) file://不用交换 $.Q>M]xH
break; N^ s!!Sbpq
SortUtil.swap(queue,j,k); p&sK\
k = j; VkDS&g~Ws
} XQ3*
} 4Kn9*V
private void fixUp(int k) { mvq7G
while (k > 1) { 6Z&u
int j = k >> 1; ]osx.
if (queue[j]>queue[k]) ]TBtLU3
break; o9Txo (tYU
SortUtil.swap(queue,j,k); qwF*(pTHq
k = j; Z@,PZ
} WVWS7N\
} n(1wdlEp
3p3WDL7
} 6`qr:.
Q:kVCm/;
} i&pJg1
6b]1d04hT
SortUtil： UiR,^/8ED
r%F(?gKXkd
package org.rut.util.algorithm; _+\:OB[Y
9rTz N
import org.rut.util.algorithm.support.BubbleSort; #~4{`]W6
import org.rut.util.algorithm.support.HeapSort; Q^lQi\[
import org.rut.util.algorithm.support.ImprovedMergeSort; <r<Dmn|\a
import org.rut.util.algorithm.support.ImprovedQuickSort; dv'E:R(a
import org.rut.util.algorithm.support.InsertSort; =@JS88+
import org.rut.util.algorithm.support.MergeSort; n</k/Mk}
import org.rut.util.algorithm.support.QuickSort; qcTmsMpj
import org.rut.util.algorithm.support.SelectionSort; c.(Ud`jc
import org.rut.util.algorithm.support.ShellSort; ZD)0P=%
6Q2orn[
/** ,2,SG/BB
* @author treeroot XLZ j
* @since 2006-2-2 B:?#l=FL
* @version 1.0 df4sOqU
*/ U=F-]lD
public class SortUtil { 4|6&59?pnc
public final static int INSERT = 1; tE]5@b,R
public final static int BUBBLE = 2; Nmp>UE,7[
public final static int SELECTION = 3; -@ZzG uS(
public final static int SHELL = 4; )X~Pr?52?
public final static int QUICK = 5; %j*k
public final static int IMPROVED_QUICK = 6; *D?((_+
public final static int MERGE = 7; [,<\RviI
public final static int IMPROVED_MERGE = 8; (Ffb&GL
public final static int HEAP = 9; `6Ureui2?
)W8L91-
public static void sort(int[] data) { @7@e`b?
sort(data, IMPROVED_QUICK); W$" Y%^L
} L\b]k,Ksf
private static String[] name={ _%wK}eH+sy
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -G],H)M
}; gX@nPZjg
psIkG0 &
private static Sort[] impl=new Sort[]{ pbDw Lo]
new InsertSort(), xH<'GB)
new BubbleSort(), +{xMIl_
new SelectionSort(), G{kj}>kS_
new ShellSort(), ^:4L6
new QuickSort(), D=r-
new ImprovedQuickSort(), H>?:U]
new MergeSort(), J>=1dCK
new ImprovedMergeSort(), )=jT_?9b
new HeapSort() 908ayfVI
}; e'1 ^+*bU
Y*@|My`
public static String toString(int algorithm){ 5v|H<wPp
return name[algorithm-1]; })20Zld}a
} 3L%WVCB
iV?` i
public static void sort(int[] data, int algorithm) { J`w]}GlH
impl[algorithm-1].sort(data); T3PX gL)o
} #)GW}U]X
WP0 #i~3*
public static interface Sort { la'e[t7
public void sort(int[] data); Z#-k.|}
} cz2,",+~
\Okc5;kB2
public static void swap(int[] data, int i, int j) { S dIGU[fm
int temp = data; &/s~? Iq
data = data[j]; \ V6
data[j] = temp; }{ n\tzR
} \Yj#2ww
} g<fDY6jt