[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; 5}^08Xl
} i2R]lE8
int i1=l; UU~;B
int i2=mid+1; K~~*M?.Z
for(int cur=l;cur<=r;cur++){ cw-JGqLx
if(i1==mid+1) ia.B@u1/
data[cur]=temp[i2++]; [&}<!:9'
else if(i2>r) ;%.k}R%O@
data[cur]=temp[i1++]; |q b92|?
else if(temp[i1] data[cur]=temp[i1++]; ?|rw=%
else w I 7
data[cur]=temp[i2++]; ,7nb;$]
} *E q7r>[
} 0J,d9a [1
G/;aZ
} zgOwSg8
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改进后的归并排序: M@ZpgAfq
E0%Y%PQ**{
package org.rut.util.algorithm.support; jl%eO.
?BZ`mrH^
import org.rut.util.algorithm.SortUtil; X1QZEl
k#G7`dJl
/** 48*pKbbM4
* @author treeroot QL!+.y%
* @since 2006-2-2 _[Wrd?Z
* @version 1.0 6D]G*gwk[
*/ 4!W?z2ly~R
public class ImprovedMergeSort implements SortUtil.Sort { t-m,~IoW
!x /Z"
private static final int THRESHOLD = 10; Pb&+(j
@MH]s [{o\
/* Z 2jMBe
* (non-Javadoc) N28?JQha
* D_kzR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mP+yjRw
*/ on&=%tCAL
public void sort(int[] data) { n&&U9sf?
int[] temp=new int[data.length]; 6? ly.h$
mergeSort(data,temp,0,data.length-1); :rc[j@|pH
} X51$5%
4gt "dfy+
private void mergeSort(int[] data, int[] temp, int l, int r) { ON!G{=7
int i, j, k; l'8wPmy%N
int mid = (l + r) / 2; i_^NbC
if (l == r) lD=j/
return; 5!fW&OiY
if ((mid - l) >= THRESHOLD) @a3v[}c*
mergeSort(data, temp, l, mid); SytDo (_=W
else &Y2P!\\2
insertSort(data, l, mid - l + 1); -zkL)<7
if ((r - mid) > THRESHOLD) ``CADiM:S
mergeSort(data, temp, mid + 1, r); vK~KeZ\,p=
else 4?uG> ;V
insertSort(data, mid + 1, r - mid); UwT$IKR
[`dipLkr
for (i = l; i <= mid; i++) { _qNLy/AY
temp = data; '0rwNEg
} -{mq\GvGn
for (j = 1; j <= r - mid; j++) { nit7|T@^
temp[r - j + 1] = data[j + mid]; *dgNpJ 9
} |.W;vc<
int a = temp[l]; l[{}ZKZ
int b = temp[r]; bncFrzp#o
for (i = l, j = r, k = l; k <= r; k++) { ="E V@H?U
if (a < b) { (ZsR=:9(
data[k] = temp[i++]; HKw4}FC*
a = temp; a$&6a
} else { %*}f<k{6
data[k] = temp[j--]; <7) 6*u
b = temp[j]; Lxrn#Z eM
} 2 -8:qmP(
} fbkjK`_q
} "b7C0NE
IV*$U7~
/** b;ZAz
* @param data nP5fh_/
* @param l 1OS3Gv8jc~
* @param i POs~xaZ`H
*/ %W@IB8]Vr
private void insertSort(int[] data, int start, int len) { ( "z;Q?(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S3wH M
} 9hpM*wt
} YJsi5
} RjHpC7b*%
} Jx?>1q=M
wB"Gw` D
堆排序： 5(Oc"0''H
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package org.rut.util.algorithm.support; AW68'G*m
hKYPH?b%
import org.rut.util.algorithm.SortUtil; I%xJ)fIK
IBsn>*ja<
/** W{aNS@1
* @author treeroot +2O_LPV$,
* @since 2006-2-2 4N: ;Mo&B
* @version 1.0 6>J#M
*/ _gh7_P^H=d
public class HeapSort implements SortUtil.Sort{ 3/05ee;|
Bk<P~-I
/* (non-Javadoc) *h9vMks o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s50ln&2
*/ }C}_ I:=C
public void sort(int[] data) { ^123.Ru|t
MaxHeap h=new MaxHeap(); w7u >|x!
h.init(data); `$- Ib^
for(int i=0;i h.remove(); )FPbE^s(
System.arraycopy(h.queue,1,data,0,data.length); d5hE!=
} s~G{-)*
OK(d&
private static class MaxHeap{ 4y.[tk5
"<#:\6aym
void init(int[] data){ Df^S77&c!
this.queue=new int[data.length+1]; P#PQ4uK \
for(int i=0;i queue[++size]=data; ?Pc3*.
fixUp(size); p7er04/}\
} BZ9iy~
} Bs}>#I
Q8i6kf!
private int size=0; {c;3$
dW68lVWq_
private int[] queue; ]+P&Y:
W9"I++~f
public int get() { =ndKG5
return queue[1]; ak[)+_k_
} @( l`_Wx
?f&I"\y
public void remove() { :~Y$\Ww(~
SortUtil.swap(queue,1,size--); R3A^VE;qP
fixDown(1); XT"c7]X
} RkzBn
file://fixdown T:$_1I $
private void fixDown(int k) { bk]|C!7$
int j; ,vPF=wq
while ((j = k << 1) <= size) { (P-<9y@
if (j < size %26amp;%26amp; queue[j] j++; Y{=@^4|]
if (queue[k]>queue[j]) file://不用交换 =d}3>YHS
break; 6Y^o8R
SortUtil.swap(queue,j,k); {J$aA6t:"T
k = j; $!Tw`O
} @@jdF-Utj;
} J7xmf,76w
private void fixUp(int k) { 1S.~-K*X
while (k > 1) { ':3KZ4/C
int j = k >> 1; FQ%mNowuj
if (queue[j]>queue[k]) 5FxU=M1gF
break; !=:c8V
SortUtil.swap(queue,j,k); ~A/_\-
k = j; r;z A `
} 5,C,q%2
} Df (6DuW
t=AR>M!w~
} M %~kh"
^>fs
} "L]_NST
`Z-`-IL
SortUtil： j$6}r
WmA578|l!
package org.rut.util.algorithm; <X?F :?Mk
}JD(e}8$!
import org.rut.util.algorithm.support.BubbleSort; Npqbxb
import org.rut.util.algorithm.support.HeapSort; %:*HzYf
import org.rut.util.algorithm.support.ImprovedMergeSort; 32yNEP{
import org.rut.util.algorithm.support.ImprovedQuickSort; eORt qX8*
import org.rut.util.algorithm.support.InsertSort; I?QKd@
import org.rut.util.algorithm.support.MergeSort; K@m^QioMj
import org.rut.util.algorithm.support.QuickSort; N"TD$NrK\
import org.rut.util.algorithm.support.SelectionSort; '#PT C,0UJ
import org.rut.util.algorithm.support.ShellSort; uZ+<
zlfm})+G
/** PBmt.yF
* @author treeroot 0*)79Sz
* @since 2006-2-2 U{EW +>
* @version 1.0 4%TC2Laii
*/ (P?9Jct
public class SortUtil { T (qu~}
public final static int INSERT = 1; cO:x{~
public final static int BUBBLE = 2; {\B!Rjt[T
public final static int SELECTION = 3; %[J( ,rm
public final static int SHELL = 4; |{ kB`
public final static int QUICK = 5; iwbjjQPr
public final static int IMPROVED_QUICK = 6; V~;YV]1Y
public final static int MERGE = 7; S4w/ kml3
public final static int IMPROVED_MERGE = 8; \ (,2^T'$J
public final static int HEAP = 9; H< j+-u4b
t(Uoi~#[
public static void sort(int[] data) { #XsqTK_nk
sort(data, IMPROVED_QUICK); 9L};vkYk#
} |NI0zd
private static String[] name={ ?@_dx=su
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rfjQx]3pB
}; O%r<I*T^r
nFqMS|EN
private static Sort[] impl=new Sort[]{ LdOB[W
new InsertSort(), Dng^4VRd
new BubbleSort(), >qE$:V"_5
new SelectionSort(), }49?Z3
new ShellSort(), uyj5}F+O
new QuickSort(), ;c`B'
new ImprovedQuickSort(), `d8TA#|`
new MergeSort(), /y}
new ImprovedMergeSort(), V+^\SiM
new HeapSort() g=)@yZ3>v
}; ;bX{7j
r$KDNa$/a
public static String toString(int algorithm){ xInWcQ
return name[algorithm-1]; mWh:,[o
} `JRdOe
CVm*Q[5s"
public static void sort(int[] data, int algorithm) { R:Lu)d>=
impl[algorithm-1].sort(data); 9cLKb
} M0|z^2
6R25Xfm_|
public static interface Sort { ?g'l/xuRe
public void sort(int[] data); 2,+H;Ypi!
} \21!NPXH2
bu]bfnYi9
public static void swap(int[] data, int i, int j) { GB#7w82
int temp = data; d^7<l_u~ !
data = data[j]; !Ej<J&e
data[j] = temp; Rh=h{O
} {?8rvAjY
} ?^dyQhb