[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; .{ Lm
} {YLJKu!M
int i1=l; `l40awGCz
int i2=mid+1; 6C}Z1lZl
for(int cur=l;cur<=r;cur++){ n&{N't
if(i1==mid+1) S5vMP N
data[cur]=temp[i2++]; 2>$L>2$
else if(i2>r) TbM*?\7
data[cur]=temp[i1++]; znpZ0O\!
else if(temp[i1] data[cur]=temp[i1++]; \>k#]4@rp
else j~> #{"C
data[cur]=temp[i2++]; .5r0%
} I}3K,w/7mi
} `erQp0fBM
iEO2Bil]
} o6%f%:&
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改进后的归并排序: ~OfKn1D
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package org.rut.util.algorithm.support; E1[%~Cpw*
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import org.rut.util.algorithm.SortUtil; P?ol]MwaB
TyXOd,%zl
/** 5WG@ ;K%
* @author treeroot FJ. :*K[
* @since 2006-2-2 0kEq|k9
* @version 1.0 1S@k=EKM
*/ e.h:9`"*
public class ImprovedMergeSort implements SortUtil.Sort { ;!Bkk9r"H
N/.9Aj/h~&
private static final int THRESHOLD = 10; $$>,2^qr&L
:fUmMta
/* q@> m~R
* (non-Javadoc) AG=1TZI"
* .6(i5K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =~*u(0sJa
*/ `/iN%ZKum
public void sort(int[] data) { w-/Tb~#E
int[] temp=new int[data.length]; k{8N@&D
mergeSort(data,temp,0,data.length-1); y['icGU6
} 0$ EJ4
L2tmo-]nw
private void mergeSort(int[] data, int[] temp, int l, int r) { .=D6<4#t
int i, j, k; HX[#tT|m~
int mid = (l + r) / 2; !%=k/|#
if (l == r) Jl}7]cVq#
return; )E|Bb=%
if ((mid - l) >= THRESHOLD) b`=rd 4cpU
mergeSort(data, temp, l, mid); AS ul
else Rh^$0Q*2
insertSort(data, l, mid - l + 1); ea/6$f9^
if ((r - mid) > THRESHOLD) fA5# 2P{
mergeSort(data, temp, mid + 1, r); KcE=m\h
else ],m-,K
insertSort(data, mid + 1, r - mid); ^a r9$$~/!
)/w2]d/9
for (i = l; i <= mid; i++) { nwYeOa/t
temp = data; q3t@)+l>*
} xCD+qP^
for (j = 1; j <= r - mid; j++) { l0V@19Ec
temp[r - j + 1] = data[j + mid]; !Ai;S
} Pr"ESd>Y
int a = temp[l]; +ZO*~.zZ
int b = temp[r]; C2T,1=
for (i = l, j = r, k = l; k <= r; k++) { Z )I4U
if (a < b) { \/%mabLK
data[k] = temp[i++]; lRq!|.C
a = temp; hR2.w/2j
} else { 9:WKG'E8a
data[k] = temp[j--]; Ar_/9@n
b = temp[j]; 12E"6E)
} WJWrLu92\U
} +iR;D$w
} A_+WY|#M
Bf.RYLsh6
/** |k0VJi
* @param data 1zffPC8jl
* @param l !.A>)+AK
* @param i 1Ppzch7
*/ -=Hr|AhE
private void insertSort(int[] data, int start, int len) { :0l(Ll KD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6lGL.m'Ra
} &W%TY:Da|
} zq#o8))4X
} $}829<gh7
} $n) w4p_
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堆排序： ~tWBCq 6
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package org.rut.util.algorithm.support; b< rM3P;
f{J7a1 `_
import org.rut.util.algorithm.SortUtil; uE2Yn`Ha
F&\o1g-L
/** .T7ciD
* @author treeroot "T'!cy
* @since 2006-2-2 Co M8
* @version 1.0 N=kACEo
*/ We`axkC
public class HeapSort implements SortUtil.Sort{ lZ|Ao0(
9D@Ez"xv
/* (non-Javadoc) j(SQNSFD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T"z!S0I
*/ (8{Z@
public void sort(int[] data) { l/]P6 @N
MaxHeap h=new MaxHeap(); $t]DxMd
h.init(data); R#t~i&v/
for(int i=0;i h.remove(); ^ZsME,
System.arraycopy(h.queue,1,data,0,data.length); _R]1J0
} &sW/r::,
>TE&myZ?*
private static class MaxHeap{ +$9w[ARN+
5H79) n>
void init(int[] data){ *?uF&( 0
this.queue=new int[data.length+1]; _tjH=Ff$
for(int i=0;i queue[++size]=data; Djzb#M'm
fixUp(size); Yv{AoL~
} 3|A"CU/z@
} D@Q|QY5qic
?TXFOr]g]2
private int size=0; ?vhW`LXNB
2`z+_DA
private int[] queue; 2XE4w# [j
h1BdASn_
public int get() { @/9> /?JP
return queue[1]; UkdQ#b1
} %VdJ<=@
XdB8Oj~~
public void remove() { A_2ppEG
SortUtil.swap(queue,1,size--); X9P-fF?0
fixDown(1); -Ju!2by
} *33Zt+
file://fixdown ,+JAwII>O
private void fixDown(int k) { }/=VnCfU
int j; <%!@cE+y
while ((j = k << 1) <= size) { /q>"">
if (j < size %26amp;%26amp; queue[j] j++; JsH9IK:
if (queue[k]>queue[j]) file://不用交换 /g_}5s-Z
break; ak'RV*>mT
SortUtil.swap(queue,j,k); Fv3fad@x
k = j; |ey6Czm
} SDot0`s>
} 4Fnr8 r8W
private void fixUp(int k) { (j'[t
while (k > 1) { [1E u6X6
int j = k >> 1; U*6r".sz
if (queue[j]>queue[k]) <AB]FBo(
break; <)rol
SortUtil.swap(queue,j,k); _/KN98+
k = j; l9-(ofY*J
} xL mo?Y*
} Jo2:0<VL
?gTY!;$P
} )O_Y(^+ $
|n~-LH++
} 2?HLEiI1
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SortUtil： t,&1~_9
pwm]2}+
package org.rut.util.algorithm; snX5mD
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import org.rut.util.algorithm.support.BubbleSort; =n9|r.\&uJ
import org.rut.util.algorithm.support.HeapSort; h_H$+!Nzb
import org.rut.util.algorithm.support.ImprovedMergeSort; n&&X{Rl
import org.rut.util.algorithm.support.ImprovedQuickSort; +Ge-!&.;A
import org.rut.util.algorithm.support.InsertSort; @q|I$'K]x
import org.rut.util.algorithm.support.MergeSort; $yG=exh3v
import org.rut.util.algorithm.support.QuickSort; uP<tP:
import org.rut.util.algorithm.support.SelectionSort; *;Sj&O
import org.rut.util.algorithm.support.ShellSort; \=i>}Sg
$O=m/l$
/** 85-00m ~
* @author treeroot S)p1[&" M
* @since 2006-2-2 rtC.!].;%
* @version 1.0 H:2#/1Oz>
*/ wU+-;C5e
public class SortUtil { 1^$ vmULj
public final static int INSERT = 1; <w<&,xM
public final static int BUBBLE = 2; Y=\;$:L[
public final static int SELECTION = 3; d/N&bTg:
public final static int SHELL = 4; WF`y j%0
public final static int QUICK = 5; X)x$h{ OE
public final static int IMPROVED_QUICK = 6; oF8#gn_
public final static int MERGE = 7; 8Y_wS&eB
public final static int IMPROVED_MERGE = 8; Fn1|Wt*
public final static int HEAP = 9; xXQDHc-Ba
6]1cy&SG
public static void sort(int[] data) { :OQx;>'
sort(data, IMPROVED_QUICK); cl/}PmYIZ
} 0"3l2Eo
private static String[] name={ %9C_p]P*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 09HlL=0q
}; GB&<+5t2
:VGvL"Kro
private static Sort[] impl=new Sort[]{ :/A3l=}iV
new InsertSort(), ef*Vs
new BubbleSort(), ;%{REa
new SelectionSort(), Db3#;
new ShellSort(), "Y-_83
new QuickSort(), Ahv%Q%m%2
new ImprovedQuickSort(), w7+3?'L
new MergeSort(), P;GRk6
new ImprovedMergeSort(), s"gNHp.oF
new HeapSort() 2 ,RO
}; OTwIR<_B+
VB=$D|Ll
public static String toString(int algorithm){ ^--kcTiR%
return name[algorithm-1]; RE6d&#N
} mhpaPin*JS
wA$ JDf)Vg
public static void sort(int[] data, int algorithm) { tX)l_?jVH
impl[algorithm-1].sort(data); Jvac|rN
} xL&M8:
)"KKBil0
public static interface Sort { Q#M@!&
public void sort(int[] data); $S Kax#[
} kMd1)6%6A
p`N+9t&I4
public static void swap(int[] data, int i, int j) { #s%_ L
int temp = data; "=H(\V
data = data[j]; tr?U/YG
data[j] = temp; ' m^nKG$"
} meJ%mY
} ' ?tx?t