[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; fy|I3
} ssoE,6kS
int i1=l; U^U hZ!
int i2=mid+1; NZ6:ZzM
for(int cur=l;cur<=r;cur++){ `R.Pz _oe
if(i1==mid+1) DUF$-'A
data[cur]=temp[i2++]; BS?$eai@:9
else if(i2>r) gOah5*Lj
data[cur]=temp[i1++]; y}|E)
else if(temp[i1] data[cur]=temp[i1++]; K~S*<?
else .n)R@&9
data[cur]=temp[i2++]; <X1lq9 lW
} }4h0{H
} 19!;0fe=
SB.=x
} EIyFGCw|U
WpnP^gmX
改进后的归并排序: 9d(#/n
d&f!\n_~
package org.rut.util.algorithm.support; -o!bO9vC
<8Nr;96IA
import org.rut.util.algorithm.SortUtil; \+l_H4\`K
bQwG"N
/** (~E-=+R[$&
* @author treeroot ;Bzx}7A
* @since 2006-2-2 aIrM-c8.O
* @version 1.0 W|uRQA`
*/ :eJJL,v
public class ImprovedMergeSort implements SortUtil.Sort { ,tg(aL
@7.7+blS"H
private static final int THRESHOLD = 10; 6?C';1
|JHNFs
/* c=9A d
* (non-Javadoc) k)X\z@I'
* ;FF+uK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cs9h\]ZA
*/ [m6+I9
public void sort(int[] data) { bqp^\yu-E
int[] temp=new int[data.length]; UL>2gl4s/
mergeSort(data,temp,0,data.length-1); 84WcaH
} 'gg<)Bd
v-q-CI?B#
private void mergeSort(int[] data, int[] temp, int l, int r) { Md~._@`|K
int i, j, k; B$x@I\(M
int mid = (l + r) / 2; q5'G]j{,Z
if (l == r) y@1QVt04
return; 1EC;t1.7
if ((mid - l) >= THRESHOLD) 0chpC)#Q3;
mergeSort(data, temp, l, mid); tY!l}:E[
else '`2MxRP
insertSort(data, l, mid - l + 1); S4{vS?>j
if ((r - mid) > THRESHOLD) }Bsh!3D<.
mergeSort(data, temp, mid + 1, r); [[6"qq
else YZSQOLN{
insertSort(data, mid + 1, r - mid); 7wPI)]$
``$$yS~d};
for (i = l; i <= mid; i++) { )z18:C3
temp = data; y"'p#j
} 5$HG#2"Kb#
for (j = 1; j <= r - mid; j++) { -$0}rfX
temp[r - j + 1] = data[j + mid]; 1r}i[5
} _5~|z$GW
int a = temp[l]; dzAumWoh
int b = temp[r]; l5&5VC)
for (i = l, j = r, k = l; k <= r; k++) { C/qKa[mg
if (a < b) { |)Dm.)/0)
data[k] = temp[i++]; i$@xb_
a = temp; t&=bW<6
} else { HQ" trV
data[k] = temp[j--]; ?Fny_{&^H
b = temp[j]; L8f+uI
} ?YZgH>7"
} g'7\WQ
} "5 ~{
V4ePYud;^
/** F+Qnf'at1
* @param data )j~{P
* @param l rOt{bh6r
* @param i Y$n+\K
*/ R+(f~ j'
private void insertSort(int[] data, int start, int len) { Xy 4k;+
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8Nyz{T[
} ]?D$n
} Y,Z$U| U
} %%?}db1n
} `^hA&/1
/*Q3=Dse]
堆排序： l9=Ka{$^*
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package org.rut.util.algorithm.support; #t(/wa4
||pOiR5
import org.rut.util.algorithm.SortUtil; f~a 7E;y
Is3Y>oX
/** , otXjz
* @author treeroot #TR!x,Hc
* @since 2006-2-2 L%5y@b{AR
* @version 1.0 .`+~mQ Wn
*/ 3MHpP5C
public class HeapSort implements SortUtil.Sort{ c|9g=DjK
+[uh);vD`G
/* (non-Javadoc) /]Y#*r8jRi
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mkyYs[
*/ x/M$_E<G
public void sort(int[] data) { D3dh,&KO\
MaxHeap h=new MaxHeap(); Lv/}&'\(
h.init(data); w/(T
for(int i=0;i h.remove(); 9(S=0<
System.arraycopy(h.queue,1,data,0,data.length); KNQj U-A
} r`6f
zNKB'hsK
private static class MaxHeap{ 4To$!=
%pOz%v~
void init(int[] data){ >\pF5a`
this.queue=new int[data.length+1]; tyW[i8)O}
for(int i=0;i queue[++size]=data; YB7A5
fixUp(size); Hkia&nz'3
} #'%ii,;wQ
} NwYQ6VEA
t/O^7)%
private int size=0; z5iCQ4C<
]3*w3Y!XK
private int[] queue; 0Q7<;'m
v*GS>S
public int get() { N-F&=u}
return queue[1]; ,WOCG2h
} 3Q62H+MC
JC~sz^>p\
public void remove() { @Nh}^D >j
SortUtil.swap(queue,1,size--); kn>qX{W
fixDown(1); b~>@x{
} DPW^OgL;
file://fixdown L9Zz-Dr s
private void fixDown(int k) { Y&=DjKoVh
int j; ATc!c +
while ((j = k << 1) <= size) { +0ukLc@
if (j < size %26amp;%26amp; queue[j] j++; vD9.X}l]
if (queue[k]>queue[j]) file://不用交换 Y_y!$jd(N
break; P(8Yz W
SortUtil.swap(queue,j,k); <eSg%6z
k = j; =d5;F`m
} !+@70|gFF
} [|*7"Q(
private void fixUp(int k) { ;rL1[qwk
while (k > 1) { tk'&-v'h
int j = k >> 1; !fAvxR
if (queue[j]>queue[k]) MhE".ZRd
break; 58#nYt
SortUtil.swap(queue,j,k); H*<E5^#dw
k = j; Y+23 jlgb
} :/][ n9J^
} X}3?k<m
sxF2ku4A
} Zi}h\R a
qrw*?6mSQ
} z@19gD#8
/K!f3o+
SortUtil： }I}GA:~$%
bg0ix"
package org.rut.util.algorithm; *< fJgc"3
CHqi5Z/+
import org.rut.util.algorithm.support.BubbleSort; hUvA;E(qD
import org.rut.util.algorithm.support.HeapSort; 5GJkvZtFY
import org.rut.util.algorithm.support.ImprovedMergeSort; =(TMcu$4`
import org.rut.util.algorithm.support.ImprovedQuickSort; p%bMfi*T
import org.rut.util.algorithm.support.InsertSort; yG~Vvpv
import org.rut.util.algorithm.support.MergeSort; 67T.qX2I$
import org.rut.util.algorithm.support.QuickSort; e&ZTRgYdi
import org.rut.util.algorithm.support.SelectionSort; RJDk7{(
import org.rut.util.algorithm.support.ShellSort; K`X'Hg#_P2
4n(w{W>
/** #H Jlm1d
* @author treeroot }8"i~>>a
* @since 2006-2-2 mhU=^/X
* @version 1.0 #H~$^L
*/ UjJ&P)
public class SortUtil { sLTQm*jL
public final static int INSERT = 1; 6_yatq5c
public final static int BUBBLE = 2; /u]#dX5
public final static int SELECTION = 3; L5d YTLY
public final static int SHELL = 4; &l-d_dh
public final static int QUICK = 5; G^L9[c= ,
public final static int IMPROVED_QUICK = 6; 4J=6U&b
public final static int MERGE = 7; .pl,ujv
public final static int IMPROVED_MERGE = 8; ,:-^O#
public final static int HEAP = 9; rWO#h{
bqF?!t<B
public static void sort(int[] data) { kMEXgzl
sort(data, IMPROVED_QUICK); +",`Mb
} 'MyJw*%b]
private static String[] name={ U~7{q >
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &DtI+)[|
}; 0$yHO2 f
$OGMw+$C^
private static Sort[] impl=new Sort[]{ hlc g[Qdo*
new InsertSort(), 'f %oL/,
new BubbleSort(), -s0J8b
new SelectionSort(), p!Tac%D+k
new ShellSort(), ~Lu,jLKL=[
new QuickSort(), WoSKN7*
new ImprovedQuickSort(), }VH2G94Ll
new MergeSort(), EjEXev<]
new ImprovedMergeSort(), bgInIe
new HeapSort() xw1,Wbu]
}; McdK!V
t[b(erO'
public static String toString(int algorithm){ 9(KffnE^
return name[algorithm-1]; 5rA>2<\pQ
} q}g0-Da
#fyY37-
public static void sort(int[] data, int algorithm) { l,b_' m@
impl[algorithm-1].sort(data); 2v*X^2+
} e5ww~%,
N=8CVI
public static interface Sort { '@QK<!%,
public void sort(int[] data); 4 T/ ~erc
} $VxuaOTyVZ
;:)u rI?
public static void swap(int[] data, int i, int j) { G6"4JTWO
int temp = data; GL&rT&
data = data[j]; .e S* F
data[j] = temp; "KY]2v.
} $@dPIq4o;}
} H[r64~Sth