[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; Dyk[ug5
} -)OkG#J@
int i1=l; b;J0'o^G|
int i2=mid+1; )ehB)X
for(int cur=l;cur<=r;cur++){ 5\w=(c9A
if(i1==mid+1) ]fADaw-R
data[cur]=temp[i2++]; Z0ncN])
else if(i2>r) #A/]Vs$
data[cur]=temp[i1++]; t&9as}
else if(temp[i1] data[cur]=temp[i1++]; [%84L@:h
else %g0z)J
data[cur]=temp[i2++]; #x5N{8
} w38c
} [CDXCV-z
[7e{=\`=
} ikY]8BCc
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改进后的归并排序: C~KWH@
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package org.rut.util.algorithm.support; (9KDtr*(2i
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import org.rut.util.algorithm.SortUtil; ;c X^8;F0
c8-69hb?
/** sWsG,v_
* @author treeroot ;<kZfx
* @since 2006-2-2 A3MZxu=':3
* @version 1.0 I mPu}
*/ hY.e[+
public class ImprovedMergeSort implements SortUtil.Sort { c?.r"5#
Q7uAf3
private static final int THRESHOLD = 10; GJC!0{8;
lrs0^@.+
/* =mKfFeO.
* (non-Javadoc) YN%=Oq
* 3?.1~"-J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R=vbUA
*/ ~aJW"\{
public void sort(int[] data) { fiE>H~
int[] temp=new int[data.length]; `1fJ:b/M
mergeSort(data,temp,0,data.length-1); p}YI#f in/
} &/>;LgN
Q7~'![(a
private void mergeSort(int[] data, int[] temp, int l, int r) { z(g%ue\
int i, j, k; :DtZ8$I`]C
int mid = (l + r) / 2; ^))PCn_zb
if (l == r) r5MxjuOB1
return; .'t (-eT,
if ((mid - l) >= THRESHOLD) FOOQ'o[}
mergeSort(data, temp, l, mid); IL~]m?'V(
else jo9J%vo
insertSort(data, l, mid - l + 1); <|{L[
if ((r - mid) > THRESHOLD) yz[%MXI
mergeSort(data, temp, mid + 1, r); FU_fCL8yA
else LP.HS'M~u
insertSort(data, mid + 1, r - mid); *j|/2+pq
o3Mf:;2cC
for (i = l; i <= mid; i++) { ,>D ja59
temp = data; )l`1)Ea~
} YV5Yx-+3w$
for (j = 1; j <= r - mid; j++) { N]B)Fb
temp[r - j + 1] = data[j + mid]; @SU8\:(U
} Yo>`h2C4
int a = temp[l]; OENzG~
int b = temp[r]; >vUB%OLyP
for (i = l, j = r, k = l; k <= r; k++) { >%-Hj6%
if (a < b) { PeO]lq
data[k] = temp[i++]; C">`' G2
a = temp; h,^BC^VU9-
} else { 8]S,u:E:N
data[k] = temp[j--]; _b>F#nD,'%
b = temp[j]; ZB-QABn
} }7K@e;YUg
} {}V$`L8
} O/mR9[}
n'THe|:I
/** ~|h lE z
* @param data b)N[[sOt
* @param l xpF](>LC(
* @param i .:rmA8U[
*/ b3}Q#Y\G
private void insertSort(int[] data, int start, int len) { X4a^mw\"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }i(qt&U;
} 5?Bc Y;
} zG_p"Z7,
} _}D%iJg#
} KE<kj$
.Y;b)]@f
堆排序： T'E] i!$
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package org.rut.util.algorithm.support; )B6# A0
N#4N?BBP"
import org.rut.util.algorithm.SortUtil; .jA\f:u#
pV7N byb4
/** B@ {&<
* @author treeroot ^-hErsK
* @since 2006-2-2 /t*YDWLg
* @version 1.0 )n( Q
*/ &R,9+c
public class HeapSort implements SortUtil.Sort{ `?"6l5d.]
;\qXbL7
/* (non-Javadoc) Hy]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `N}d}O8
*/ y%S})9
public void sort(int[] data) { *t(4 $
MaxHeap h=new MaxHeap(); Mu{BUtkzG
h.init(data); :'}@Al9=>
for(int i=0;i h.remove(); 'Dath>Y=
System.arraycopy(h.queue,1,data,0,data.length); }$&xTW_
} 9cG<hX9`F
yzR=A%V8A
private static class MaxHeap{ id?"PD"%
?iv=53<c#
void init(int[] data){ :HRT 2I
this.queue=new int[data.length+1]; y(5:}x&E
for(int i=0;i queue[++size]=data; jZd}OC<
fixUp(size); n*<v]1
} 1oty*c
} xzm@ v(
)6-9)pH@)
private int size=0; [ ny6W9
ZSB?Y1wG
private int[] queue; l+[czb~
71"+<C .
public int get() { ]a?bzOr,
return queue[1]; $shp(T,q
} j+kC-U;
8md*wEjk
public void remove() { &^!h}D%T/
SortUtil.swap(queue,1,size--); 8AL\ST51x"
fixDown(1); 6ZOy&fd,Ty
} MzkkcQLK
file://fixdown bcH_V|5}
private void fixDown(int k) { U]R~gy}#
int j; Zgamd1DJ[l
while ((j = k << 1) <= size) { T2=HG Z
if (j < size %26amp;%26amp; queue[j] j++; s_[VHPN
if (queue[k]>queue[j]) file://不用交换 DMn4ll|
break; $4m*kQ
SortUtil.swap(queue,j,k); $SY]fNJQ
k = j; I4t*?
} @MbVWiv
} fThgK;Qy'U
private void fixUp(int k) { `VT>M@i/
while (k > 1) { |^a;77nE_^
int j = k >> 1; _mJG5(|
if (queue[j]>queue[k]) o6a0'vU><
break; !yJICjXj
SortUtil.swap(queue,j,k); wRvb8F0
k = j; 3@<zg1.9-
} 0N;%2=2_E
} DHw<%Z-J
Kz?#C
} s{}]D{bc
@Jn!0Y1_3
} 7TX2&kMoc
xZ.!d.rn
SortUtil： np9dM
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package org.rut.util.algorithm; b5a.go
q7\Ovjs0
import org.rut.util.algorithm.support.BubbleSort; F<|t\KOW
import org.rut.util.algorithm.support.HeapSort; Yh<WA>=
import org.rut.util.algorithm.support.ImprovedMergeSort; -_N)E ))G
import org.rut.util.algorithm.support.ImprovedQuickSort; ;9a 6pz<
import org.rut.util.algorithm.support.InsertSort; =QOg 6
import org.rut.util.algorithm.support.MergeSort; 5(m(xo6
import org.rut.util.algorithm.support.QuickSort; `yiC=$*[
import org.rut.util.algorithm.support.SelectionSort; |~0UM$OB^3
import org.rut.util.algorithm.support.ShellSort; E4z)Mr#
sG7u}r
/** <vV_%uoM
* @author treeroot aYn^)6^
* @since 2006-2-2 :-T*gqj|
* @version 1.0 -NJ!g/ >mM
*/ 7[pBUDA
public class SortUtil { neZ.`"LV
public final static int INSERT = 1; $IQw=w7p
public final static int BUBBLE = 2; U/ od~29
public final static int SELECTION = 3; fmX!6Kv
public final static int SHELL = 4; r6Aneg7
public final static int QUICK = 5; 6gL-OJNo
public final static int IMPROVED_QUICK = 6; T{v>-xBRy
public final static int MERGE = 7; w_tJ7pz8T
public final static int IMPROVED_MERGE = 8; (Z]HX@"{J
public final static int HEAP = 9; Kn`M4O
\M<3}t
public static void sort(int[] data) { 4T6 {Y
sort(data, IMPROVED_QUICK); IxZb$h[
} I:cg}JZ>|
private static String[] name={ i1lBto[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" S$,'Q^~K
}; u\yVR$pQ
w;6bD'.>;
private static Sort[] impl=new Sort[]{ yLE7>48
new InsertSort(), w>; L{
new BubbleSort(), W-Hoyn>?2
new SelectionSort(), )kXhtjOl|
new ShellSort(), dt@P>rel
new QuickSort(), {i0SS
new ImprovedQuickSort(), ]:M0Kj&h
new MergeSort(), :rMM4
new ImprovedMergeSort(), MRNNG6TUs
new HeapSort() ED>prE0
}; 9;.(u'y|
D\dWt1n
public static String toString(int algorithm){ b;sVls
return name[algorithm-1]; :KJ pk:<
} \NZIEu)5?
u$#Wv2|mk
public static void sort(int[] data, int algorithm) { JF&$t}
impl[algorithm-1].sort(data); `]Fx.)C#
} g[RI.&?
^hNgm.I
public static interface Sort { C?v[Z]t
public void sort(int[] data); g9D^)V
} wI]"U2L5
,mhQ"\+C
public static void swap(int[] data, int i, int j) { O/AaYA&
int temp = data; 9EDfd NN
data = data[j]; JWvjWY2+P
data[j] = temp; F'jWV5"*
} C2LL|jp*
} eAv4FA4g