[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; Y=Ar3O*F
} nh&J3b}B!
int i1=l; -k[tFBlw
int i2=mid+1; e5>5/l]jsg
for(int cur=l;cur<=r;cur++){ v6DxxE2n
if(i1==mid+1) )"c]FI[}
data[cur]=temp[i2++]; L1!hF3G
else if(i2>r) MV;Y?%>
data[cur]=temp[i1++]; GKsL~;8"
else if(temp[i1] data[cur]=temp[i1++]; )bCG]OM7<
else Rw ao5l=x
data[cur]=temp[i2++]; >&Ui*
} -}qGb}F8!
} bR8 HGH28
z2nUul(2
} PxVI{:Uz
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改进后的归并排序: 3{I=#>;
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package org.rut.util.algorithm.support; gQpD]p%k
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import org.rut.util.algorithm.SortUtil; +?5Uy*$
bHQKRV
/** )<x;ra^
* @author treeroot X?v^>mA
* @since 2006-2-2 5)>ZO)F&
* @version 1.0 qnk,E-
*/ 7ru9dg1?
public class ImprovedMergeSort implements SortUtil.Sort { ZaUcP6[h
D_19sN@0m
private static final int THRESHOLD = 10; N}x/&e
kG;eOp16R
/* ! N"L`RWD
* (non-Javadoc) sRe#{EuJ
* ;LF)u2x=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5Ckk5b
*/ .iP G/e
public void sort(int[] data) { w1"gl0ga$
int[] temp=new int[data.length]; M8",t{7
mergeSort(data,temp,0,data.length-1); 8NAWA3^B
} XC/]u%n8](
)*TW\v`B
private void mergeSort(int[] data, int[] temp, int l, int r) { kTiPZZI
int i, j, k; ]dGr1ncu
int mid = (l + r) / 2; Z*vpQBbu
if (l == r) S`2mtg
return; /,uSCITD
if ((mid - l) >= THRESHOLD) ]g8i>,G
mergeSort(data, temp, l, mid); gM;)
else Q&.IlVB[
insertSort(data, l, mid - l + 1); iQm.]A
if ((r - mid) > THRESHOLD) B=Zukg1G
mergeSort(data, temp, mid + 1, r); hV>4D&<
else @cS1w'=
insertSort(data, mid + 1, r - mid); sx-Hw4.a"
I"F .%re
for (i = l; i <= mid; i++) { -M>K4*%K
temp = data; 5}d/8tS
} SN[L4}{
for (j = 1; j <= r - mid; j++) { '!yS72{$2
temp[r - j + 1] = data[j + mid]; g@k#J"Q'[
} ,2 g M-
int a = temp[l]; ]4 K1%ZV
int b = temp[r]; ;5Wx$Yfx
for (i = l, j = r, k = l; k <= r; k++) { _86*.3fQG
if (a < b) { :uIi ?
data[k] = temp[i++]; &Xn8oe
a = temp; V'Z&>6Z
} else { 68J 9T^84
data[k] = temp[j--]; /XW&q)z-Hl
b = temp[j]; 8=n9hLhqo
} lZS_n9Sc
} +C'TW^
} >TlW]st
bQ^DX `o6P
/** q2S!m6!
* @param data kY'<u
* @param l |Uy e>%*}4
* @param i 0U~;%N+lv
*/ _Ra<|NVQh
private void insertSort(int[] data, int start, int len) { #4P3xa
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U=&^H!LVY
} 4[LLnF--
} ElEv(>G*
} #LN5&i;s
} !sfXq"F
8z."X$
堆排序： 7|+|\7l#
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package org.rut.util.algorithm.support; [w&#+h-q
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import org.rut.util.algorithm.SortUtil; JGk3b=K
f.aB?\"f6
/** Uw2,o|=O
* @author treeroot |b$>68:
* @since 2006-2-2 `x{.z=xC
* @version 1.0 Sc4obcw%
*/ N"Qg\PS_
public class HeapSort implements SortUtil.Sort{ M1/M}~
+{")E)
/* (non-Javadoc) <fC@KY>#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S' (cqO}=F
*/ H[BD)
public void sort(int[] data) { E-yT
MaxHeap h=new MaxHeap(); O6m.t%*
h.init(data); L25kh}Q#7
for(int i=0;i h.remove(); `1E|PQbWc
System.arraycopy(h.queue,1,data,0,data.length); :mXGIRi
} :jt;EzCLg%
vU_d=T%$
private static class MaxHeap{ (~j,mk
fBf4]^
void init(int[] data){ 74@lo-/LY
this.queue=new int[data.length+1]; &v5G92
for(int i=0;i queue[++size]=data; r/NSD$-n
fixUp(size); [x2JFS#4
} ^CZCZ,v
} d5@X#3Hd
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private int size=0; DS#cm3
a|DsHZ^6^
private int[] queue; Q^z=w![z
mR{CVU
public int get() { Y7<zm}=(/
return queue[1]; ]{f^;y8
} ==QWwPpA
hpbwZ
public void remove() { (C8 U
SortUtil.swap(queue,1,size--); doP$N3Zm
fixDown(1); v! 7s M
} _GVE^yW~z
file://fixdown U@Z>/ q
private void fixDown(int k) { nNt*} k
int j; C`\9cej
while ((j = k << 1) <= size) { QGs1zfh*
if (j < size %26amp;%26amp; queue[j] j++; T>}0) s
if (queue[k]>queue[j]) file://不用交换 Bk?8zYp
break; T n"e
SortUtil.swap(queue,j,k); ,:D=gQ@`
k = j; a}:A,t<6
} v8ba~
} 2 ;JQX!
private void fixUp(int k) { 21r== H$
while (k > 1) { T vrk^!
int j = k >> 1; (GCG/8s
if (queue[j]>queue[k]) Iz DG&c
break; ?Bo?JMV
SortUtil.swap(queue,j,k); OFc\fW#
k = j; ojHhT\M`
} !Y (apVQ
} t#C,VwMe[
!Eq#[Gs
} <d5@CA+M
o^3FL||P#r
} 6cJ<9i &
` ^DjEdUN
SortUtil： rwiw Rh
`E@kFJ(<On
package org.rut.util.algorithm; =M7TCE
EXuLSzQwv
import org.rut.util.algorithm.support.BubbleSort; MkwU<ae AB
import org.rut.util.algorithm.support.HeapSort; D^Te%qnW
import org.rut.util.algorithm.support.ImprovedMergeSort; w/ TKRCO3
import org.rut.util.algorithm.support.ImprovedQuickSort; l , ..5
import org.rut.util.algorithm.support.InsertSort; qu_)`wB
import org.rut.util.algorithm.support.MergeSort; u*2fP]n
import org.rut.util.algorithm.support.QuickSort; n-DaX kK
import org.rut.util.algorithm.support.SelectionSort; R{HV]o|qk
import org.rut.util.algorithm.support.ShellSort; R (G2qi
+a%xyD:.?
/** 3gAR4
* @author treeroot xq}-m!nX
* @since 2006-2-2 \[yr=X
* @version 1.0 j&5G\6:
*/ >c<pDNt?
public class SortUtil { [F+(^- (
public final static int INSERT = 1; Y9F)`17
public final static int BUBBLE = 2; cJCU*(7&
public final static int SELECTION = 3; k<H%vg>{~s
public final static int SHELL = 4; ( #*"c
public final static int QUICK = 5; ~.J,A\F
public final static int IMPROVED_QUICK = 6; i}v9ut]B
public final static int MERGE = 7; W{ fZ[z
public final static int IMPROVED_MERGE = 8; @}Zd (o
public final static int HEAP = 9; Gqb])gXpl
]4`t\YaT
public static void sort(int[] data) { ;B~P>n}}_]
sort(data, IMPROVED_QUICK); .u l 53 m
} +Mk#9r
private static String[] name={ ]jyM@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @Br {!#Wf
}; u:@U $:sZ
Y25^]ON*\^
private static Sort[] impl=new Sort[]{ #02Kdo&Vy
new InsertSort(), Zb(E:~h\
new BubbleSort(), AEY$@!8
new SelectionSort(), [$pmPr2
new ShellSort(), #EDEYEW7
new QuickSort(), 9Hd;353Q
new ImprovedQuickSort(), !;S"&mcPDJ
new MergeSort(), .[?BlIlm
new ImprovedMergeSort(), R_^/,^1
new HeapSort() 0"78/6XIs
}; _T5)n=|
B/G-Yh$E
public static String toString(int algorithm){ /.Fj.6U5
return name[algorithm-1]; _%~$'Hy
} 54{q.I@n
+`B'r '
public static void sort(int[] data, int algorithm) { 3uV4/%U
impl[algorithm-1].sort(data); w7FoL
} MPIlSMe
X8i(~ B
public static interface Sort { 5+- I5HX|~
public void sort(int[] data); hN3u@P^
} y7:tr
\=;uu_v$
public static void swap(int[] data, int i, int j) { Ye5jB2Z
int temp = data; wG1l+^p
data = data[j]; (&[[46
data[j] = temp; +H_MV=A^
} )55\4<ty
} im]g(#GnKh