[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; #Bih=A #
} k$NNpv&;d
int i1=l; 3= q,k<=L
int i2=mid+1; J8;lG
for(int cur=l;cur<=r;cur++){ a*D])Lu[
if(i1==mid+1) XMLJX~
data[cur]=temp[i2++]; \y^Ho1Fj
else if(i2>r) p$:ERI
data[cur]=temp[i1++]; SKUri
else if(temp[i1] data[cur]=temp[i1++]; \-h%z%{R
else Qm >x?
data[cur]=temp[i2++]; O/N@Gz[g%
} V~~4<?=A
} 4[.DQ#r
'=V!Y$tn
} rD?G7l<~>_
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改进后的归并排序: :|5\XV)>
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package org.rut.util.algorithm.support; w y\0o
J?1U'/Wx2
import org.rut.util.algorithm.SortUtil; "J_#6q*
p!_3j^"{
/** [2l2w[7Rid
* @author treeroot <aPbKDF~V
* @since 2006-2-2 nRSiW*;R
* @version 1.0 kLfk2A;'i
*/ Y+kfMAv
public class ImprovedMergeSort implements SortUtil.Sort { m) -DrbE
JHvawFBN<u
private static final int THRESHOLD = 10; A#@9|3
!,0%ZG}]7
/* |GLh|hr
* (non-Javadoc) uexm|5|
* ->rr4xaKC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t!285J8tn
*/ kgZiyPcw
public void sort(int[] data) { YPU*T&~
int[] temp=new int[data.length]; N+3]C9 2o
mergeSort(data,temp,0,data.length-1); Y48MCL
} 2|re4
bZKlQ<sI
private void mergeSort(int[] data, int[] temp, int l, int r) { 6]D%|R,Q#}
int i, j, k; h@H8oZ[
int mid = (l + r) / 2; IHs^t/;Iv
if (l == r) F^/b!)4X
return; f7y3BWOi]
if ((mid - l) >= THRESHOLD) L#>^R
mergeSort(data, temp, l, mid); 4]P5k6nV
else ToXgl4:kd
insertSort(data, l, mid - l + 1); !VoAN5#;
if ((r - mid) > THRESHOLD) g)M"Cx.
mergeSort(data, temp, mid + 1, r); hUo}n>Aa
else >69-[#P!
insertSort(data, mid + 1, r - mid); 6 *GR_sMm
PCkQ hR
for (i = l; i <= mid; i++) { ~A-vIlGt!
temp = data; 6oA2"!u^w
} I%Yeq"5RB
for (j = 1; j <= r - mid; j++) { WW&agr
temp[r - j + 1] = data[j + mid]; +k<0:Fi
} ^fq^s T.$
int a = temp[l]; v{44`tR
int b = temp[r]; [/+}E X
for (i = l, j = r, k = l; k <= r; k++) { = 9K5f#;e
if (a < b) { `v"p""_H
data[k] = temp[i++]; 5IJm_oy
a = temp; 4b/>ZHFOF;
} else { m.g2>r`NU
data[k] = temp[j--]; [(kC/W)!
b = temp[j]; QrSF1y'd
} ,|lDR@
} $E,,::oJ
} ,Qb(uirl]
B_3:.1>"BM
/** J4l\
* @param data vS1#ien#
* @param l 02RZ>m+
* @param i CUI\:a-
*/ K4w#}gzok
private void insertSort(int[] data, int start, int len) { N7l`-y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <uKd)l
} ZdsYIRU#
} @GyxOc@6
} ]K!NLvz
} +!JTEKHKH
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堆排序： [zsUboCkc
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package org.rut.util.algorithm.support; Z.$)#vM5
BufXnMh.
import org.rut.util.algorithm.SortUtil; ;RUod .x
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/** D~T;z pS
* @author treeroot l6~wm1vO
* @since 2006-2-2 _rakTo8BY
* @version 1.0 C>=[fAr mO
*/ ;Im%L=q9GL
public class HeapSort implements SortUtil.Sort{ E},^,65
h( V:-D
/* (non-Javadoc) 3I.0jA#T&/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !V O^oD7
*/ J`d_=C?J
public void sort(int[] data) { ah2L8jN"
MaxHeap h=new MaxHeap(); /JGET
h.init(data); NfsF'v
for(int i=0;i h.remove(); ?qt.+2:
System.arraycopy(h.queue,1,data,0,data.length); {^V9?^?d (
} VNT*@^O_=
vAt]N)R
private static class MaxHeap{ 'Z}3XVZEN
QJ^'Uyfdn
void init(int[] data){ my+2@ln
this.queue=new int[data.length+1]; O]cuJp
for(int i=0;i queue[++size]=data; {Q~HMe`,
fixUp(size); c_ Dg0
} bD:[r))#e
} $GJuS^@%
&$NYZ3?9
private int size=0; /3KPK4!m
|x+g5~$
private int[] queue; jxdX7aik
NjH` AMGBT
public int get() { u5O`|I@R
return queue[1]; m/bP`-/,
} EN-;@P9;C
H/''lI{k)
public void remove() { k/,7FDO?m
SortUtil.swap(queue,1,size--); h6;vOd~%
fixDown(1); 6^VPRp
} L )53o!
file://fixdown (kmrWx= $
private void fixDown(int k) { !4vepa}Y
int j; n]x%xnt
while ((j = k << 1) <= size) { 8~j1
if (j < size %26amp;%26amp; queue[j] j++; `)TuZP_)
if (queue[k]>queue[j]) file://不用交换 c_Lcsn
break; !e?2 x@J
SortUtil.swap(queue,j,k); ]y\Wc0q
k = j; _L% =Q ulu
} pZ)N,O3
} Rc2JgV
private void fixUp(int k) { (TTS-(
while (k > 1) { iPCDxDLN3V
int j = k >> 1; K:L_y1!T
if (queue[j]>queue[k]) a\ZNNk
break; c1sVdM}|
SortUtil.swap(queue,j,k); G/N1[)
k = j; E2i'lO\P
} ]S+KH \2
} Y_= ]w1
*b,4qMr
} k{C03=xk
zFm:=,9
} " 7g\X$
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SortUtil： B*OBXN>'P
wO&+Bb\=
package org.rut.util.algorithm; F S!D
*nx$r[Mqj
import org.rut.util.algorithm.support.BubbleSort; V{C{y5
import org.rut.util.algorithm.support.HeapSort; 5*\]F}
import org.rut.util.algorithm.support.ImprovedMergeSort; t|?eNKVV9'
import org.rut.util.algorithm.support.ImprovedQuickSort; V: n\skM
import org.rut.util.algorithm.support.InsertSort; d=eIsP'h
import org.rut.util.algorithm.support.MergeSort; FSD~Q&9&
import org.rut.util.algorithm.support.QuickSort; F10TvJ U
import org.rut.util.algorithm.support.SelectionSort; 4vJg"*?
import org.rut.util.algorithm.support.ShellSort; C+%6N@
PrhGp _5
/** ApTE:Fm1
* @author treeroot b_w(F_0
* @since 2006-2-2 LhCwZ1
* @version 1.0 o0 |T<_
*/ tLzb*U8'1w
public class SortUtil { E RjMe'q4
public final static int INSERT = 1; k"F\4M
public final static int BUBBLE = 2; p+#]Jr
public final static int SELECTION = 3; S0w:R:q}L
public final static int SHELL = 4; !:3X{)4
public final static int QUICK = 5; cD ?'lB-
public final static int IMPROVED_QUICK = 6; fk2p}
public final static int MERGE = 7; L>&9+<-B
public final static int IMPROVED_MERGE = 8; c&'5r OY~
public final static int HEAP = 9; [w{x+6uX'
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public static void sort(int[] data) { {F ',e~}s
sort(data, IMPROVED_QUICK); #CRd@k?
} s<{) X$
private static String[] name={ V/]o':
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &3f^]n!@
}; .&2~gA
$1Qcz,4B|
private static Sort[] impl=new Sort[]{ yY_#fJj
new InsertSort(), zuS4N?t`p
new BubbleSort(), uc Ph*M
new SelectionSort(), B &e'n<
new ShellSort(), MW|R)gt
new QuickSort(), +vIsYg*#2M
new ImprovedQuickSort(), cRv#aV
new MergeSort(), 7;9 Jn
new ImprovedMergeSort(), |3G;Rh9w,
new HeapSort() vg8Yc
}; #z =$*\u
]cM,m2^2
public static String toString(int algorithm){ r2m&z%N&
return name[algorithm-1]; \k3EFSm
} 6t4Khiwx
nL+y"O
public static void sort(int[] data, int algorithm) { ]Jo}F@\g
impl[algorithm-1].sort(data); @a (-U.CZ
} t"?)x&dS
Ch_eK^ g1
public static interface Sort { m4?a'z"
public void sort(int[] data); ) uTFId
} Y=D\
[ d`m)MW-
public static void swap(int[] data, int i, int j) { 5c$\DZ(
int temp = data; _&N}.y)+t
data = data[j]; rV}&G!V_t
data[j] = temp; v8K`cijSS
} .Bojb~zt
} 1 %8JMq\