[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; Q:k}Jl
} <+vw@M
int i1=l; _C[q4?
int i2=mid+1; PKg@[<g43
for(int cur=l;cur<=r;cur++){ ~;{;,8!)
if(i1==mid+1) DjQFi
data[cur]=temp[i2++]; T&u5ki4NE
else if(i2>r) MJ [m
data[cur]=temp[i1++]; DKJmTH]rUg
else if(temp[i1] data[cur]=temp[i1++]; /zVOK4BqN+
else 0Y{yKL
data[cur]=temp[i2++]; }.m<
} G[I"8iS,
} MPg)=LI
EC!02S
} }"%?et(
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改进后的归并排序: hxd`OG<gF
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package org.rut.util.algorithm.support; EF}\brD1
O$j7i:G'5
import org.rut.util.algorithm.SortUtil; vJc-6EO
tKx~1-
/** rkCx{pe9
* @author treeroot ]e>w}L(gV
* @since 2006-2-2 }1i`6`y1
* @version 1.0 ]uJ"?k=
*/ e95Lo+:f
public class ImprovedMergeSort implements SortUtil.Sort { ?u=Fj_N_
Wk4s reB
private static final int THRESHOLD = 10; dx{bB%?Y\=
oiT[de\S
/* udUyh%n
* (non-Javadoc) YPK(be_|I
* bj0G5dc=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9gEwh<
*/ l2rd9-T
public void sort(int[] data) { '(yAfL 9}
int[] temp=new int[data.length]; >j(_[z|v3
mergeSort(data,temp,0,data.length-1); xU>WEm2
} [{<`o5qR
bvr^zH,C
private void mergeSort(int[] data, int[] temp, int l, int r) { T?soJ]A
int i, j, k; wb5baY9
int mid = (l + r) / 2; +wvWwie
if (l == r) o_Z5@F
return; A8fOQ
if ((mid - l) >= THRESHOLD) Agg<tM{yB
mergeSort(data, temp, l, mid); }{qZ[/JwqN
else EZy)A$|
insertSort(data, l, mid - l + 1); l7259Ro~
if ((r - mid) > THRESHOLD) >:S?Mnv6
mergeSort(data, temp, mid + 1, r); 6?mibvK
else |\<`Ib4j
insertSort(data, mid + 1, r - mid); eJVjuG
J^nBdofP
for (i = l; i <= mid; i++) { W*4-.*U8a
temp = data; ^ft>@=K(|
} o]` *M|
for (j = 1; j <= r - mid; j++) { *:YiimOY"
temp[r - j + 1] = data[j + mid]; KRLQ #,9
} z(exA
int a = temp[l]; D>@I+4{p
int b = temp[r]; |`f$tj
for (i = l, j = r, k = l; k <= r; k++) { m )zUU
if (a < b) { #`iB`|
data[k] = temp[i++]; dh*ZKI^@(
a = temp; axRV:w;E<
} else { eV"h0_ox
data[k] = temp[j--]; c9'vDTE%~
b = temp[j]; Xy&A~F
} dvx#q5f_S
} G<8/F<m/
} mpEK (p
gX}8#O.K$
/** r CHl?J
* @param data } FlT%>Gw
* @param l [0[i5'K:
* @param i =:,g
*/ e&F8m%t
private void insertSort(int[] data, int start, int len) { Y3cMC)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "3"V3w
} C12Fl
} |&nS|2.'
} &yTqZ*Yuk
} |'8Nh
'8.r-`l(
堆排序： +nhLIO{{L
o>i4CCU+
package org.rut.util.algorithm.support; /P3 <"?#k
qI9z;_,gNz
import org.rut.util.algorithm.SortUtil; B=T'5&
VT`^W Hu
/** \0I_<
* @author treeroot sPQQ"|wU
* @since 2006-2-2 _|\~q[ep
* @version 1.0 L>NL:68yN
*/ n)e 6>R;
public class HeapSort implements SortUtil.Sort{ S9D<8j^
D~iz+{Q4
/* (non-Javadoc) e/&{v8Hmb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3`|@H-c9
*/ xY8$I6
public void sort(int[] data) { l -mfFN
MaxHeap h=new MaxHeap(); "'.UU$]d
h.init(data); z`}qkbvi
for(int i=0;i h.remove(); |?xN\O^#}
System.arraycopy(h.queue,1,data,0,data.length); oj<gD
} 1~`fVg
tBWrL{xLe
private static class MaxHeap{ (vnAbR#e
9(7-{,c
void init(int[] data){ JPUW6e07o
this.queue=new int[data.length+1]; D& i94\vVa
for(int i=0;i queue[++size]=data; mb3"U"ohs
fixUp(size); 7#a-u<HF"
} \fdv]f
} SmH=e@y~Lx
eHZws`W
private int size=0; :#ik. D
!zpRrx_
private int[] queue; T!kN)#S
"| g>'wM*
public int get() { ^*Q ?]N
return queue[1]; [5b--O
} g2ixx+`?|:
wo/\]5
public void remove() { s`8= 3]w
SortUtil.swap(queue,1,size--); 5m 4P\y^a
fixDown(1); Vwf$JdK%&l
} 2\{M:\2o
file://fixdown n'LrQU
private void fixDown(int k) { Sy_G,+$\
int j; 8MtGlW%Eh
while ((j = k << 1) <= size) { HM1Fz\Sf
if (j < size %26amp;%26amp; queue[j] j++; LL|r A:
if (queue[k]>queue[j]) file://不用交换 /Iokf@5
break; ZJJY8k `
SortUtil.swap(queue,j,k); FVbb2Y?R
k = j; ]Q1yNtN
} ^ VyKd
} 1n8/r}q'H
private void fixUp(int k) { cwlRQzQ(
while (k > 1) { RSRS wkC
int j = k >> 1; ltSU fI
if (queue[j]>queue[k]) V)k4:H
break; 7xlkZF
SortUtil.swap(queue,j,k); AV]2euyn
k = j; ? :%@vM
} )2o?#8J
} 4F:\-O
~G&dqw/.-U
} |YWD8 +
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} _N cR)2
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SortUtil： &6!)jIWJ
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package org.rut.util.algorithm; oZgjQM$YP
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import org.rut.util.algorithm.support.BubbleSort; Nai2W<,
import org.rut.util.algorithm.support.HeapSort; C{rcs'
import org.rut.util.algorithm.support.ImprovedMergeSort; !;A\.~-!G
import org.rut.util.algorithm.support.ImprovedQuickSort; TIDO@NwF
import org.rut.util.algorithm.support.InsertSort; F)QDJE0
import org.rut.util.algorithm.support.MergeSort; cuITY^6
import org.rut.util.algorithm.support.QuickSort; #trK^(
import org.rut.util.algorithm.support.SelectionSort; LH% F8
import org.rut.util.algorithm.support.ShellSort; J/$&NWF
Zu[su>\
/** $s:aW^k
* @author treeroot k4;7<j$ir
* @since 2006-2-2 d7upz]K9g
* @version 1.0 g!|kp?
*/ Lqa4Vi
public class SortUtil { wP@(?z
public final static int INSERT = 1; oG\Vxg*
public final static int BUBBLE = 2; 1Pu~X \sO
public final static int SELECTION = 3; v!5 `|\
public final static int SHELL = 4; I\ob7X'Xu!
public final static int QUICK = 5; NXrlk
public final static int IMPROVED_QUICK = 6; U[MA)41
public final static int MERGE = 7; Y$_B1_
public final static int IMPROVED_MERGE = 8; TvbE2Q;/UL
public final static int HEAP = 9; 7{*>agQh
f]CXu3w(J
public static void sort(int[] data) { y<Ot)fa$
sort(data, IMPROVED_QUICK); m{HS0l'
} nNn:-
private static String[] name={ 8d'0N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" iYy1!\
}; }|=|s f
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private static Sort[] impl=new Sort[]{ FZnw0tMq
new InsertSort(), (GfZ*
new BubbleSort(), '`Hr}
new SelectionSort(), VOLj>w
new ShellSort(), R6->t #n,
new QuickSort(), @q)d
new ImprovedQuickSort(), (sZ"iGn%
new MergeSort(), wibNQ`4k
new ImprovedMergeSort(), D0f]$
new HeapSort() ;2QP7PrSY
}; %pCTN P
;$g?T~v7
public static String toString(int algorithm){ p`qgrI`
return name[algorithm-1]; kAUymds;O
} BI@[\aRLQ
w7L)'9
public static void sort(int[] data, int algorithm) { 8}:nGK|kx
impl[algorithm-1].sort(data); -QNh
} ]`WJOx4
Q7CsJzk~)
public static interface Sort { 5z)~\;[ -
public void sort(int[] data); X:{!n({r=
} F#E3q|Q"BS
!&E-}}<
public static void swap(int[] data, int i, int j) { I>$&-i
int temp = data; 8z\xrY
data = data[j]; >H,*H;6
data[j] = temp; Fsg*FH7J
} _yR^*}xJb
} \i&<s;