[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; ]ed7Q3lq
} R^.c
int i1=l; [mF=<G"
int i2=mid+1; WK.,q>#
for(int cur=l;cur<=r;cur++){ (D+%*ax
if(i1==mid+1) 7j"B-k#
data[cur]=temp[i2++]; dhuIVBp!!e
else if(i2>r) @s\}ER3
data[cur]=temp[i1++]; Ae<;b Of
else if(temp[i1] data[cur]=temp[i1++]; clr]gib
else ^(:na6C
data[cur]=temp[i2++]; o/!a7>xO4
} l_fERp#y
} 2 xi@5;!
iT1HbAT]
} _$v$v$74^
/!y3ZzL
改进后的归并排序: WhV>]B2+"
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package org.rut.util.algorithm.support; 6|1#Prj
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import org.rut.util.algorithm.SortUtil; S7CD#Y[s
aQ)g7C
/** uJ,I6P~9
* @author treeroot -AKbXkc~\
* @since 2006-2-2 {7=k/Y*U
* @version 1.0 o2LUB)=R'
*/ %5<t3H"
public class ImprovedMergeSort implements SortUtil.Sort { tNW0 C]
]8opI\
private static final int THRESHOLD = 10; 5}_,rF?cX
'RCX6TKBnR
/* 2V*<J:;wb
* (non-Javadoc) (' i_Xe
* }$s._)a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iHyA;'!Os
*/ e#4 iue7U
public void sort(int[] data) { AFNE1q;{\
int[] temp=new int[data.length]; kC+dQ&@g{
mergeSort(data,temp,0,data.length-1); 1)M%]I4
} N,`<:'
8f#&CC!L
private void mergeSort(int[] data, int[] temp, int l, int r) { |7G=f9V
int i, j, k; ,An*w_
int mid = (l + r) / 2; :*lB86Ly
if (l == r) t`A5wqm
return; f.u[!T
if ((mid - l) >= THRESHOLD) %:.00F([r
mergeSort(data, temp, l, mid); ?I#zcD)w
else 'I)E.DoF
insertSort(data, l, mid - l + 1); p:^;A/D
if ((r - mid) > THRESHOLD) ed7Hz#Qc
mergeSort(data, temp, mid + 1, r); ehls:)F
else Z9 tjo1X
insertSort(data, mid + 1, r - mid); KP!ctlP~
G(y@Tor+
for (i = l; i <= mid; i++) { =nN&8vRH
temp = data; 9#niMv9
} :. a}pgh
for (j = 1; j <= r - mid; j++) { _}wy|T&7k&
temp[r - j + 1] = data[j + mid]; $+a2CZs!
} *Z"(K\1TH
int a = temp[l]; D'+kzb@
int b = temp[r]; &`[Dl(W
for (i = l, j = r, k = l; k <= r; k++) { pUaGrdGxzQ
if (a < b) { cLe659&
data[k] = temp[i++]; AW:WDNQh8n
a = temp; `;!v<@:i2
} else { c)fTI,.$
data[k] = temp[j--]; w">p 8
b = temp[j]; gb_k^wg~1'
} &U8W(NxN
} E`SFr
} NI136P
`7zNVYur8
/** rz%=qY
* @param data {!hA^[}|
* @param l we&g9j'
* @param i nAJ<@a
*/ s9Aq-N
private void insertSort(int[] data, int start, int len) { 0SBiMTm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OQON~&~
} 6uf+,F
} ;yO7!{_
} 438+zU
} T=w5FT
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堆排序： 3g]Sp/
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package org.rut.util.algorithm.support; @^$Xy<x
K?q1I<94
import org.rut.util.algorithm.SortUtil; =MqefV;-
zl j%v/9
/** \P_1@sH=
* @author treeroot J!o[/`4ib
* @since 2006-2-2 .)>DFGb>H
* @version 1.0 &Q[Y&vNn
*/ n^;:V8k
public class HeapSort implements SortUtil.Sort{ PZRm.vC)k
L+PrV y
/* (non-Javadoc) Q2)z1'Wv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zF2GW
*/ .4"9o%
public void sort(int[] data) { }F1|& A
MaxHeap h=new MaxHeap(); mT8($KQ
h.init(data); MeqW/!72$L
for(int i=0;i h.remove(); 40}8EP k)
System.arraycopy(h.queue,1,data,0,data.length); UJ_E&7,L
} uJ4RjLM`
|:s4#3
private static class MaxHeap{ "|S \J5-%
MmBM\Dnv
void init(int[] data){ cZN+D D
this.queue=new int[data.length+1]; *ws!8-)fH
for(int i=0;i queue[++size]=data; YB h:
fixUp(size); Oc;0*v[I
} gg(^:`+
} mKwhd} V
iXc-_V6
private int size=0; vIrLG1EK
ANy=f-V
private int[] queue; MC!K7ji
`J^J_s
public int get() { W :PGj0?
return queue[1]; 'g8~539{&
} l|`%FB^k
q#-szZQ
public void remove() { Dcq\1V.e`W
SortUtil.swap(queue,1,size--); M=$y_9#
fixDown(1); m&DDz+g
} :<w3.(Z
file://fixdown l tr=_
private void fixDown(int k) { wh:O"&qk
int j; 0s:MEX6w|
while ((j = k << 1) <= size) { XB-pOtVm
if (j < size %26amp;%26amp; queue[j] j++; _cx}e!BK#
if (queue[k]>queue[j]) file://不用交换 W?!(/`J]
break; gM20n^
SortUtil.swap(queue,j,k); ^u#!Yo.!(
k = j; |C@)#.nm[
} !mrB+<:
} %O;"Z`I
private void fixUp(int k) { -<a~kVv
while (k > 1) { vbmSbZ"y
int j = k >> 1; )'xTDi
if (queue[j]>queue[k]) u4NMJnX
break; _/ZIDIn
SortUtil.swap(queue,j,k); Nhn5 iN1*
k = j; ZVJbpn<lo)
} X%xX3e'
} ts3%cRN r
3x9O<H}
} dC_L~ }=
x`w 4LF
} ZrnZ7,!@
[kgT"?w=
SortUtil： 3Ec5:Caz
4s~YqP{K
package org.rut.util.algorithm; s2iR }<
1b E$x^P
import org.rut.util.algorithm.support.BubbleSort; #Oz<<G<
import org.rut.util.algorithm.support.HeapSort; g4P059
import org.rut.util.algorithm.support.ImprovedMergeSort; m;lwMrY\7>
import org.rut.util.algorithm.support.ImprovedQuickSort; vL{~?vq6
import org.rut.util.algorithm.support.InsertSort; D|,d_W
import org.rut.util.algorithm.support.MergeSort; \y{Bnp5h
import org.rut.util.algorithm.support.QuickSort; RS#)uC5/%
import org.rut.util.algorithm.support.SelectionSort; ]|( (&Y rl
import org.rut.util.algorithm.support.ShellSort; b{s_cOr/
EYd`qk3
/** ]]Ypi=<'
* @author treeroot 2BBGJE
* @since 2006-2-2 wt[MzpRP
* @version 1.0 bQow,vf
*/ 7w_`<b6
public class SortUtil { nZhL
public final static int INSERT = 1; X3#|9
public final static int BUBBLE = 2; .B{3=z^
public final static int SELECTION = 3; F*o{dLJ)
public final static int SHELL = 4; Cq?l>
public final static int QUICK = 5; Vc$x?=
public final static int IMPROVED_QUICK = 6; EE#4,d`J
public final static int MERGE = 7; /_l%Dm?
public final static int IMPROVED_MERGE = 8; .6+j&{WNo!
public final static int HEAP = 9; {N[IjY
9}iEEI
public static void sort(int[] data) { mQtGE[
sort(data, IMPROVED_QUICK); D)8&v`LS
} (]^9>3{|
private static String[] name={ NZ/gp"D?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `QXO+'j4
}; )t9<cJ=
DbP!wU lqR
private static Sort[] impl=new Sort[]{ Cy4@\X%W
new InsertSort(), di>"\On-
new BubbleSort(), f{FW7T}O2
new SelectionSort(), {=PO`1H
new ShellSort(), r#JE7uneT
new QuickSort(), D5Wo e&g,
new ImprovedQuickSort(), 2aX|E4F
new MergeSort(), m{x[q
new ImprovedMergeSort(), v*<hE>J0
new HeapSort() RmY5/IYR|:
}; AIR,XlD
3ox%1x NA
public static String toString(int algorithm){ 9Iq[@v
return name[algorithm-1]; U2
} 6!bVPIyYO
x5YW6R.<t
public static void sort(int[] data, int algorithm) { E?z3 D*U
impl[algorithm-1].sort(data); tisSj?+
} ?>cx;"xF
>N62t9Ll[
public static interface Sort { c [sydl
public void sort(int[] data); s]50Y-C
} {mrTpw
So{/V%
public static void swap(int[] data, int i, int j) { C$(US8:{
int temp = data; Q[kbEhv;
data = data[j]; #(F/P!qk
data[j] = temp; <{GpAf8-
} N4I`6uDgD
} >!848J