[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; O4cBn{Dq9
} sD$K<nyz
int i1=l; `LNKbTc[m
int i2=mid+1; hd W7Qck"
for(int cur=l;cur<=r;cur++){ :Bi 4z(
if(i1==mid+1) tB`IBuy9!"
data[cur]=temp[i2++]; i_:#][nWX
else if(i2>r) v0(_4U]/
data[cur]=temp[i1++]; 2O}X-/H
else if(temp[i1] data[cur]=temp[i1++]; 0j2mTF(C
else Sqx'nXgO
data[cur]=temp[i2++]; Te`MIR
} 7- |N&u
} LRR)T: e}q
?CldcxM#
} ( 6ucA
sJMpF8
改进后的归并排序: WidLUv
VAp 1{
package org.rut.util.algorithm.support; j_.tg7X
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import org.rut.util.algorithm.SortUtil; CIVV"p`}
^iWJqpLe
/** g"N&*V2
* @author treeroot +LlAGg]Z
* @since 2006-2-2 I#'yy7J
* @version 1.0 U,8mYv2|
*/ BKV:U\QZ
public class ImprovedMergeSort implements SortUtil.Sort { 6]mAtA`Y
d4)0G-|
private static final int THRESHOLD = 10; :o:Z
S{Zf}8?6$
/* f?TS#jG4}
* (non-Javadoc) })j N 8px
* @ V_i%=go
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |d,bo/:
*/ 8\G"I
public void sort(int[] data) { U,lO{J[T
int[] temp=new int[data.length]; +1r><do;
mergeSort(data,temp,0,data.length-1); TAq[g|N-;
} B%5"B} nG
`~D{]'j
private void mergeSort(int[] data, int[] temp, int l, int r) { kG5Uc83#G
int i, j, k; "-\8Y>E
int mid = (l + r) / 2; owwWm1@
if (l == r) 5lyHg{iqD
return; %~M#3Ywa
if ((mid - l) >= THRESHOLD) ]G^9PZ-
mergeSort(data, temp, l, mid); .*Z#;3
else .EC~o
insertSort(data, l, mid - l + 1); Y?-Ef sK
if ((r - mid) > THRESHOLD) {"*_++|
mergeSort(data, temp, mid + 1, r); pb G5y7
else n]t3d
insertSort(data, mid + 1, r - mid); LP/SblE
a*t>Ks'C
for (i = l; i <= mid; i++) { LYiIJAZ.
temp = data; D~M*]&
} ^>^h|$
for (j = 1; j <= r - mid; j++) { "N)InPR-
temp[r - j + 1] = data[j + mid]; cqT%6Si
} ^])s\a$
int a = temp[l]; \odns
int b = temp[r]; $~\Tl:!#?
for (i = l, j = r, k = l; k <= r; k++) { 7X>*B~(R
if (a < b) { wh!8\9{g
data[k] = temp[i++]; ZZ/k7(8
a = temp; Y~w1_>b
} else { : @$5M
data[k] = temp[j--]; 9Q1w$t~Y
b = temp[j]; N,.awA{
} .HRd6O;
} -J0OtrZ
} B5+$VQ
9i D&y)$"
/** v^;vH$B
* @param data sXtt$HID=
* @param l "'XYW\bI
* @param i {1+meE
*/ m}]QP\
private void insertSort(int[] data, int start, int len) { MHGaf`7ro
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m-#]v}0A
} #V$sb1u
} HZjuL.Tj
} `R!2N4|;
} t^}"8
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堆排序： W@i|=xS?
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package org.rut.util.algorithm.support; 0#ON}l)>
J(A+mYr{:
import org.rut.util.algorithm.SortUtil; $`R=Q
G_5w5dbG
/** [&l+Ve(
* @author treeroot w2jB6NQX
* @since 2006-2-2 zy.v[Y1!
* @version 1.0 .-[]po
*/ 1#8~@CQ ::
public class HeapSort implements SortUtil.Sort{ {Z1-B60P
:a:m>S<~
/* (non-Javadoc) +n)bWB%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *}_i[6_\E
*/ WI.+9$1:P
public void sort(int[] data) { %IDl+_j
MaxHeap h=new MaxHeap(); (`u+(M!^
h.init(data); .4[M-@4+]
for(int i=0;i h.remove(); /||8j.Tm
System.arraycopy(h.queue,1,data,0,data.length); = )4bf"~8
} 8#9OSupp
Cv/3-&5S
private static class MaxHeap{ Ns#L9T#
]\]mwvLT
void init(int[] data){ ymT]ow6C
this.queue=new int[data.length+1]; prB:E[1
for(int i=0;i queue[++size]=data; 8#4Gs Q"
fixUp(size); [?(qhp!
} #a'CoJs
} v&7x ~!O
_d+` Gw
private int size=0; \jS^+Xf?^
f#hmMa
private int[] queue; ,u!_mV
W)Y:2P<.
public int get() { 4VkJtu5
return queue[1]; lE*.9T
} ,mKUCG
gKgdu($NJ
public void remove() { =/\l=*
SortUtil.swap(queue,1,size--); *OHjw;xm+
fixDown(1); ?%/*F<UVQ
} zy~*~;6tW
file://fixdown v+dT7*^@
private void fixDown(int k) { ha9 dz
int j; ZmI#-[/
while ((j = k << 1) <= size) { =/4}!B/
if (j < size %26amp;%26amp; queue[j] j++; /b6j<]H
if (queue[k]>queue[j]) file://不用交换 PWfd<Yf!
break; BZjL\{IW
SortUtil.swap(queue,j,k); ZS@R?
k = j; I;9DG8C&v*
} 8^R~qpg%
} `_"?$ v2F
private void fixUp(int k) { RLGIST`
while (k > 1) { %6Y}0>gY
int j = k >> 1; Ie8SPNY-H
if (queue[j]>queue[k]) EJJ&`,q
break; B*^QTJ
SortUtil.swap(queue,j,k); %;J$ h^
k = j; N]GF>kf:
} 5"+;}E|q
} W;U<,g '
N'|9rB2e
} g%D.sc)69
0 4oMgH>Vd
} XHY,;4
6c}nP[6|
SortUtil： SL<EZn0F9
`[x'EJp#
package org.rut.util.algorithm; B<~BX[
y@Td]6|f
import org.rut.util.algorithm.support.BubbleSort; 6']WOM#
import org.rut.util.algorithm.support.HeapSort; qVds 2
import org.rut.util.algorithm.support.ImprovedMergeSort; )Rj?\ZUR
import org.rut.util.algorithm.support.ImprovedQuickSort; '%a:L^a?
import org.rut.util.algorithm.support.InsertSort; (D\`:1g
import org.rut.util.algorithm.support.MergeSort; ("=24R=a
import org.rut.util.algorithm.support.QuickSort; I#W J";kqB
import org.rut.util.algorithm.support.SelectionSort; VY0-18 o
import org.rut.util.algorithm.support.ShellSort; -or)NE
'47E8PIJ|
/** ffaMF~+
* @author treeroot &@qB6!^
* @since 2006-2-2 V~t; J
* @version 1.0 c{jTCkzq
*/ t /lU*
public class SortUtil { cWI7];/d;
public final static int INSERT = 1; 5)gC<
public final static int BUBBLE = 2; a JQ_V
public final static int SELECTION = 3; 2}5@:cwR+
public final static int SHELL = 4; c2d1'l]n
public final static int QUICK = 5; VZ2CWE)t
public final static int IMPROVED_QUICK = 6; vnX~OVz2
public final static int MERGE = 7; 8=mx5Gwz-
public final static int IMPROVED_MERGE = 8; Nm3CeU
public final static int HEAP = 9; \r&(l1R
'tVe#oI
public static void sort(int[] data) { Wa%p+(\<uB
sort(data, IMPROVED_QUICK); X C'|
} <h`}I3Ao
private static String[] name={ i\RB KF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ul:M=8nE%
}; &VVvZ@X;
[kI[qByf
private static Sort[] impl=new Sort[]{ quFNPdP
new InsertSort(), Jz-RMX=
new BubbleSort(), z~;@Mo"*f
new SelectionSort(), )N&95\u
new ShellSort(), PxJvE*6^H
new QuickSort(), ,go$6
new ImprovedQuickSort(), CW~c<,"
new MergeSort(), E|=]k
new ImprovedMergeSort(), qnw8#!%I
new HeapSort() r#^uY:T%
}; ES[]A&tf
S2$r 6T
public static String toString(int algorithm){ =5g|7grQ:`
return name[algorithm-1]; tU>4?`)E
} =#vU$~a
!]P=v`B.
public static void sort(int[] data, int algorithm) { ='HLA-uT
impl[algorithm-1].sort(data); g"D:zK)
} Qy) -gax:,
:tLMh08h
public static interface Sort { e`%<D[-
public void sort(int[] data); ZZW%6-B
} hj3wxH.}
iD:TKB_r
public static void swap(int[] data, int i, int j) { 8{p#Nl?U1
int temp = data; kT&GsR/
data = data[j]; (vbI4&r
data[j] = temp; Dfd%Z;Yu
} 4I;$a;R!
} u:\DqdlU`