[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; 8fwM)DKS
} .xp|w^
int i1=l; %d\|a~p:
int i2=mid+1; H\Jpw
for(int cur=l;cur<=r;cur++){ IN%04~=H
if(i1==mid+1) `e!hT@Xxa
data[cur]=temp[i2++]; 2dF:;k k
else if(i2>r) N%.DjH
data[cur]=temp[i1++]; 5{&<X.jv
else if(temp[i1] data[cur]=temp[i1++]; TGJ\f
else zUhJr$N$
data[cur]=temp[i2++]; WrGz`
} f{DcR"
} MYb^ILz H3
C8 b%r|^#
} Ag!#epi{0
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改进后的归并排序: G$D6#/rR
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package org.rut.util.algorithm.support; hsUP5_
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import org.rut.util.algorithm.SortUtil; ;|Ja|@82
zjrr*iw
/** mxRe2<W
* @author treeroot S-Y(Vn4
* @since 2006-2-2 `(9B(&t^,
* @version 1.0 /B?hM&@z
*/ 6v9{$:
public class ImprovedMergeSort implements SortUtil.Sort { $Di2BA4Di
Y%V|M0 0`
private static final int THRESHOLD = 10; d">Ya !W
9$xEktfV
/* plY`lqm
* (non-Javadoc) %T&#JF+;
* !I? J^0T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o\luE{H .?
*/ (qP !x 2j
public void sort(int[] data) { 0P_Y6w+
int[] temp=new int[data.length]; nAp7X-t
mergeSort(data,temp,0,data.length-1); 4D/mm(2d$
} N3};M~\
Wsr #YNhx|
private void mergeSort(int[] data, int[] temp, int l, int r) { "Jp6EL%
int i, j, k; 2Z-BZuK6p
int mid = (l + r) / 2; 3o'SY@'W
if (l == r) CDcs~PR@B
return; h,@x5q>g
if ((mid - l) >= THRESHOLD) Wb4%=2Qn
mergeSort(data, temp, l, mid); \4SFD3$&
else uK?T<3]'
insertSort(data, l, mid - l + 1); $Q:5KNF+p
if ((r - mid) > THRESHOLD) 7<=7RPWmD
mergeSort(data, temp, mid + 1, r); i#jCf3%+ h
else ^saJfr x
insertSort(data, mid + 1, r - mid); 5m+:GiI
/N@0qQ
for (i = l; i <= mid; i++) { pg~`NN
temp = data; } V4"-;P
} *ihg'
for (j = 1; j <= r - mid; j++) { Kg@9kJB
temp[r - j + 1] = data[j + mid]; n#N<zC/
} ;e0>.7m
int a = temp[l]; +{/zP{jH
int b = temp[r]; r,6~?hG]
for (i = l, j = r, k = l; k <= r; k++) { K@{jY\AZNx
if (a < b) { !UUh7'W4u
data[k] = temp[i++]; @T1>%oi
a = temp; p;n)YY$
} else { <MN+2^ed&
data[k] = temp[j--]; e<^tY0rR&
b = temp[j]; 0nAeeVz|
} Iw"?%k\U
} H[x9 7r
} ji(S ?^
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/** t:M({|m Y
* @param data r _r$nl
* @param l nX Qz
* @param i ej<z]{`05
*/ Smk]G))o{
private void insertSort(int[] data, int start, int len) { :;"3k64
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6x@-<{L
} 1&YP}sg)
} cf@#a@7m9
} qRB7I:m-Wi
} 7k3":2:
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堆排序： V!KtF
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package org.rut.util.algorithm.support; "_)
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import org.rut.util.algorithm.SortUtil; c_^H;~^rL
`p^M\!h*O
/** qrX6FI
* @author treeroot =GR Em5
* @since 2006-2-2 '~ ]b;nA
* @version 1.0 ijhMJ?3
*/ {/7'uD\ H
public class HeapSort implements SortUtil.Sort{ v;K\#uc_
JmYi&
/* (non-Javadoc) $]81s`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &8&WY1cU
*/ NHc+QMbou(
public void sort(int[] data) { 6-X7C9`C
MaxHeap h=new MaxHeap(); 1*-58N*
h.init(data); n6o}$]H
for(int i=0;i h.remove(); 71/6=aq>n
System.arraycopy(h.queue,1,data,0,data.length); <E\BKC%M
} Eun%uah6c
r9vC&pWZ
private static class MaxHeap{ |E7]69=P
~`N|sI,
void init(int[] data){ [1vrv(u>
this.queue=new int[data.length+1]; NM]6 o
for(int i=0;i queue[++size]=data; I3s}t$`y(
fixUp(size); 8'cDK[L
} 3YT _GW{
} d'-^VxO0
Dkdm~~Rr
private int size=0; \aW5V:?
v5$zz w
private int[] queue; wOk:Q4OjL
t1~*q)!Mo
public int get() { ?y04g u6p
return queue[1]; ng 6G<hi
} TOuFFR
=C:0='a
public void remove() { R\+$^G}#6
SortUtil.swap(queue,1,size--); >$"bwr}'4B
fixDown(1); /cjf 1Dc
} H+0 *
file://fixdown Aqm0|GlJ
private void fixDown(int k) { a,tP.Xsl
int j; j/Kw-h ,5"
while ((j = k << 1) <= size) { Kc{wv/6}T
if (j < size %26amp;%26amp; queue[j] j++; T@S+5(
if (queue[k]>queue[j]) file://不用交换 {jq-dL
break; p' gv5\u[w
SortUtil.swap(queue,j,k); <n`|zQ
k = j; "M*\,IH
} '/p5tw8
} I%s/h4x^B[
private void fixUp(int k) { E|fPI u
while (k > 1) { G37_ `C
int j = k >> 1; -J6}7>4^8}
if (queue[j]>queue[k]) g+CHF?O
break; }gn0bCJy
SortUtil.swap(queue,j,k); -FPl",f=r
k = j; F%|(pHk
} kR_[p._
} PRUGUHY
CRf^6k_;(
} {M$8V~8D
%q!nTGU~
} @rdC/=Y[
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SortUtil： 4@Qq5kpk*
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package org.rut.util.algorithm; }Ag2c; aaq
lwB!ti
import org.rut.util.algorithm.support.BubbleSort; s-DtkO
import org.rut.util.algorithm.support.HeapSort; l;C_A;y\
import org.rut.util.algorithm.support.ImprovedMergeSort; BdYh:
import org.rut.util.algorithm.support.ImprovedQuickSort; 4q~E\l|.5
import org.rut.util.algorithm.support.InsertSort; &KB{,:)?
import org.rut.util.algorithm.support.MergeSort; U9q*zP_jV
import org.rut.util.algorithm.support.QuickSort; c*W$wr
import org.rut.util.algorithm.support.SelectionSort; 5u8Sxfm",
import org.rut.util.algorithm.support.ShellSort; YJ0[BcZ
[+1 i$d
/** G@(7d1){
* @author treeroot R3<+z
* @since 2006-2-2 $200?[
* @version 1.0 Ylf4q/-
*/ S&0x:VW
public class SortUtil { =osj}(
public final static int INSERT = 1; ^m7PXY
public final static int BUBBLE = 2; ,s)H%
public final static int SELECTION = 3; ~E\CAZ
public final static int SHELL = 4; ^q6~xC,/
public final static int QUICK = 5; x{- caOH
public final static int IMPROVED_QUICK = 6; +1y#=iM{
public final static int MERGE = 7; 83n: h08
public final static int IMPROVED_MERGE = 8; N$+"zJmw&
public final static int HEAP = 9; 0Nfj}sXCWE
%|I|Mc
public static void sort(int[] data) { t Z%?vY~!
sort(data, IMPROVED_QUICK); 4>W`XH
} L9.#/%I\
private static String[] name={ izxCbbg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )<|TEp4r-
}; Q&J,"Vxw
^/+sl-6/F
private static Sort[] impl=new Sort[]{ g[$B90
new InsertSort(), x<l1s
new BubbleSort(), }B5I#Af7
new SelectionSort(), PX'LN
new ShellSort(), Dz{e@+>M
new QuickSort(), a !IH-XJ2
new ImprovedQuickSort(), ZUu^==a
new MergeSort(), :U9R 1^}A
new ImprovedMergeSort(), yV8).4
new HeapSort() _pS%tPw
}; 0b4OJ[
t'J fiGM
public static String toString(int algorithm){ }:%pOL n
return name[algorithm-1]; /F_ :@#H
} JVkawkeX
y AWDk0bx
public static void sort(int[] data, int algorithm) { 5c"kLq6r
impl[algorithm-1].sort(data); B'Wky>5)
} X=3@M_Jzo
#^9;<@M
public static interface Sort { cC4T3]4l'
public void sort(int[] data); )>fi={!=c
} e-VLU;
7'|PHQ?S
public static void swap(int[] data, int i, int j) { j#&
int temp = data; >=V+X"\Z
data = data[j]; ueR42J%s
data[j] = temp; 3\{Sf /#
} ,B2-'O
} zgqw*)C~