[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; 7])cu>/
} J2KULXF
int i1=l; lI)RaiMr=
int i2=mid+1; @)\{u$
for(int cur=l;cur<=r;cur++){ 1xBg^
if(i1==mid+1) Q.b<YRZ
data[cur]=temp[i2++]; z#j)uD
else if(i2>r) \ZOH3`vq
data[cur]=temp[i1++]; f%g^6[
else if(temp[i1] data[cur]=temp[i1++]; =V[ey
else 2 &(w\#'
data[cur]=temp[i2++]; 8V08>M
} }C'H@:/
} nt5x[xa
m|CB')
} Qf'%".*=~8
<=yqV]JR
改进后的归并排序: 1DTA Dh0
t_+Xt$Q7C
package org.rut.util.algorithm.support; w,s++bV;L
+L]$M)*0&
import org.rut.util.algorithm.SortUtil; TV['"'D&i
@[2Go}VF
/** b3vPGR
* @author treeroot {9,!XiF.:
* @since 2006-2-2 )-u0n],
* @version 1.0 `\pv^#5HV9
*/ 9>OPaLn
public class ImprovedMergeSort implements SortUtil.Sort { <'N(`.&3C
4g%BCGsys
private static final int THRESHOLD = 10; /A4^l]H;+3
&Q>tV+*
/* S>6f0\F/Y%
* (non-Javadoc) iPuX
* `"-ln'nw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }JWLm.e
*/ k0/S&e,*
public void sort(int[] data) { \-h%z%{R
int[] temp=new int[data.length]; h,!#YG@>
mergeSort(data,temp,0,data.length-1); f6*6*=
} 1FPt%{s3
Hf#VW^
private void mergeSort(int[] data, int[] temp, int l, int r) { l$\OSG
int i, j, k; $GI jWlAh
int mid = (l + r) / 2; Pw:{
if (l == r) g,YJh(|#{
return; Hd8 O3_5
if ((mid - l) >= THRESHOLD) eF06B'uL
mergeSort(data, temp, l, mid); 70MSP;^
else rZi\
insertSort(data, l, mid - l + 1); )o;oOPT!
if ((r - mid) > THRESHOLD) `zw^ WbCO{
mergeSort(data, temp, mid + 1, r); Ocp`6Fj
else 6!;eJYj,
insertSort(data, mid + 1, r - mid); *URBx"5XZ
`p'(:W3a
for (i = l; i <= mid; i++) { tW8&:L,m
temp = data; lR8Lfa*/7
} jI;iTKjB(
for (j = 1; j <= r - mid; j++) { "dItv#<:}
temp[r - j + 1] = data[j + mid]; ^{m&2l&87
} :,f~cdq=
int a = temp[l]; ;dR4a@
int b = temp[r]; ALO0yc
for (i = l, j = r, k = l; k <= r; k++) { })#SjFq<V
if (a < b) { iL6Yk @
data[k] = temp[i++]; y+"6Y14
a = temp; *i)3q+%.
} else { Af`qe+0E
data[k] = temp[j--]; M#CYDEB
b = temp[j]; c2o.H!>
} -yJ%G1R
} "N*bV
} ~M!9E])
Y;uQq-CP
/** N6%wHNYZ
* @param data Mnx')([;W
* @param l S!r,p};
* @param i p3q >a<
*/ Fs}vI~}
private void insertSort(int[] data, int start, int len) { MKPw;@-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d7 W[.M$]
} vhz[H
} _=Eb:n+X
} ~0T;T
} +bhR[V{0g
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堆排序： #JD:i%
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package org.rut.util.algorithm.support; a:V2(nY
2Vwv#NAV k
import org.rut.util.algorithm.SortUtil; *)|EWT?,
IBn+42V
/** Hdxon@,+cd
* @author treeroot ~B704i
* @since 2006-2-2 <{Pr(U*7}
* @version 1.0 7J6D wh{
*/ m(0c|-
public class HeapSort implements SortUtil.Sort{ dR|*VT\
d>wpG^"w
/* (non-Javadoc) u6lcl}'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9!u&8#i
*/ gT&s &0_7
public void sort(int[] data) { a^5.gfzA
MaxHeap h=new MaxHeap(); pG-9H3[f#
h.init(data); /T\'&s3D+
for(int i=0;i h.remove(); J4l\
System.arraycopy(h.queue,1,data,0,data.length); vS1#ien#
} 02RZ>m+
CUI\:a-
private static class MaxHeap{ K4w#}gzok
N7l`-y
void init(int[] data){ <uKd)l
this.queue=new int[data.length+1]; _B6W:k|-7l
for(int i=0;i queue[++size]=data; W3E7y?
fixUp(size); h|Ah\P?o
} D9 \!97
} NSV;R~"
gZW(z
private int size=0; 0tS< /G8
j0q:i}/U,
private int[] queue; TYH4r q &
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public int get() { EU,f;H
return queue[1]; ygo4.
} - xE%`X
7mBH#Q)
public void remove() { ?? 2x*l1
SortUtil.swap(queue,1,size--); E-v#G~
fixDown(1); AQU^7O
} N/V~>UJ0{*
file://fixdown HD~o]l=H
private void fixDown(int k) { L}hc|(:
int j; ODFCA. t
while ((j = k << 1) <= size) { 5==hyIy
if (j < size %26amp;%26amp; queue[j] j++; DV!10NqUr
if (queue[k]>queue[j]) file://不用交换 @lhjO>@#I
break; pW,)yo4
SortUtil.swap(queue,j,k); 7 /7,55
k = j; 7]F@g}8
} #e*jP&1S
} 3bBCA9^se
private void fixUp(int k) { {"vTaY@
while (k > 1) { Bbj%RF2,
int j = k >> 1; !3;KC"o
if (queue[j]>queue[k]) jM5w<T-2/
break; < pWk
SortUtil.swap(queue,j,k); +zL|j/q?
k = j; duq(K9S
} W20H4!G
} oksAQnQe
\C&V)/
} {Lg]chJq?
;%a
} 8:gUo8
f=T-4Of
SortUtil： w,!IvDCAw
Y2d(HD@
package org.rut.util.algorithm; m4_ZGjmJM
sg9
import org.rut.util.algorithm.support.BubbleSort; nmWo:ox4;(
import org.rut.util.algorithm.support.HeapSort; AO~f=GW
import org.rut.util.algorithm.support.ImprovedMergeSort; k%Wj+\93f
import org.rut.util.algorithm.support.ImprovedQuickSort; EC`=nGF
import org.rut.util.algorithm.support.InsertSort; 6qK`X
import org.rut.util.algorithm.support.MergeSort; MG-#p8
import org.rut.util.algorithm.support.QuickSort; 8k_cC$*Ng
import org.rut.util.algorithm.support.SelectionSort; K'f`}y9
import org.rut.util.algorithm.support.ShellSort; MJugno
7wz9x8\t
/** T8W;Lb9hQ
* @author treeroot E]c0+rh~
* @since 2006-2-2 }l<:^lX
* @version 1.0 ko+fJ&$
*/ TMw6 EM
public class SortUtil { +cwuj
public final static int INSERT = 1; 8Xx4W^*_
public final static int BUBBLE = 2; aQHB
public final static int SELECTION = 3; 1%$Z%?
public final static int SHELL = 4; ^|UD&6 dx
public final static int QUICK = 5; KbGz3O'u
public final static int IMPROVED_QUICK = 6; Ux-i iH#s
public final static int MERGE = 7; t->I# t7
public final static int IMPROVED_MERGE = 8; :ZsAWe{%,J
public final static int HEAP = 9; sL4j@Lt
60--6n
public static void sort(int[] data) { yN{TcX
sort(data, IMPROVED_QUICK); Csf!I@}Z
} _~.S~;o!b
private static String[] name={ vX}#wDNP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <^(>o
}; Y|nC_7&Bv
r?2J
private static Sort[] impl=new Sort[]{ ` #; "
new InsertSort(), &j?+%Y1n@
new BubbleSort(), S~hoAl"xb/
new SelectionSort(), i5#4@ 4aC
new ShellSort(), oxNQNJ!X
new QuickSort(), ,lDOo+eE%:
new ImprovedQuickSort(), &2sfu0K
new MergeSort(), ?)O!(=6%'
new ImprovedMergeSort(), 0)]?@"j
new HeapSort() {NUI8AL46A
}; ["WWaCcx
U28frRa
public static String toString(int algorithm){ "_ H9]}Q
return name[algorithm-1]; tLzb*U8'1w
} E RjMe'q4
k"F\4M
public static void sort(int[] data, int algorithm) { 2#Du5d
impl[algorithm-1].sort(data); S0w:R:q}L
} vw6DHN)k
fk2p}
public static interface Sort { ST1c`0e
public void sort(int[] data); 61Wh %8-
} H(tT8Q5i
1O2jvt7M
public static void swap(int[] data, int i, int j) { !g4u<7
int temp = data; ymb{rKkN3
data = data[j]; m[qW)N:w
data[j] = temp; x5R|,bY
} _sK{qQxvM=
} N(`XqeC*