[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; R$:-~<O
} DGTLlBkT
int i1=l; cC*WZ]
int i2=mid+1; 7P{= Pv+
for(int cur=l;cur<=r;cur++){ 6r~9$IM
if(i1==mid+1) b^W&-Hh
data[cur]=temp[i2++]; IL@yGuO,
else if(i2>r) P27Ot1px
data[cur]=temp[i1++]; ,HjJ jpE
else if(temp[i1] data[cur]=temp[i1++]; P y'BMk
else Z518J46o
data[cur]=temp[i2++]; [+[W\6
} y_WC"
} Oc)n,D)0
:,8y8z$+
} ]j&m\'-s
ioi/`iQR
改进后的归并排序: wkt4vE87
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package org.rut.util.algorithm.support; >k @t.PeoV
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import org.rut.util.algorithm.SortUtil; RRO@r}A!y
01n!T2;yW}
/** D^r g-E[L
* @author treeroot +Nn >*sz
* @since 2006-2-2 @[^ 3yC#
* @version 1.0 eu(Fhs
*/ ]5'*^rz ^
public class ImprovedMergeSort implements SortUtil.Sort { _c]}m3/
]TrJ*~
private static final int THRESHOLD = 10; 30h[&Oc
Jk.x^
/* UN?tn}`!
* (non-Javadoc) D4$b-?y
* %<yW(s9{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r`"_D%kc
*/ r'i99~
public void sort(int[] data) { Rxy|Ag/I;V
int[] temp=new int[data.length]; &OU.BR>
mergeSort(data,temp,0,data.length-1); rVabkwYD
} %jAc8~vW?
LNL}R[1(
private void mergeSort(int[] data, int[] temp, int l, int r) { *RY}e
int i, j, k; 'bfxQ76@sa
int mid = (l + r) / 2; m0G"Aj
if (l == r) xbiprhdv
return; ?"b __(3
if ((mid - l) >= THRESHOLD) >Iij,J5i
mergeSort(data, temp, l, mid); v8-szW).
else UB@(r86d
insertSort(data, l, mid - l + 1); J.~@j;[2
if ((r - mid) > THRESHOLD) c<1$zQY!
mergeSort(data, temp, mid + 1, r); 1^k}GXsWmE
else l<_v3/3
insertSort(data, mid + 1, r - mid); !+$qSD,%x
hx^@aI
for (i = l; i <= mid; i++) { #o&T$D5
temp = data; P.(UbF d'
} n l5+#e*\
for (j = 1; j <= r - mid; j++) { %\it4 r3
temp[r - j + 1] = data[j + mid]; $I5|rB/4?
} &Hw:65O
int a = temp[l]; ^aaj=p:cV
int b = temp[r]; *42KLns
for (i = l, j = r, k = l; k <= r; k++) { `_ ^I 2
if (a < b) { P#pb48^-
data[k] = temp[i++]; ^(Gl$GC$Mu
a = temp; HtN:v
} else { @Hj]yb5
data[k] = temp[j--]; |(~IfSE2
b = temp[j]; r%: :q^b3
} Xp;'Wa"@
} 6~ET@"0uK
} ,5 ,r.
<,Gjo]z
/** ['(qeS@5O
* @param data ?~ybFrc
* @param l Q*1Avy6]
* @param i uJ"#j X
*/ drCL7.j#L
private void insertSort(int[] data, int start, int len) { %~eu&\os
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); o5],c9R9b
} ~,W|i
} ''2:ZXX
} 6@Q; LV+
} .WglLUJ:Z
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堆排序： "P5,p"k:)
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package org.rut.util.algorithm.support; `~axOp9N
@>`N%wH'
import org.rut.util.algorithm.SortUtil; FkMM>X
OfLj 4H6Q
/** 6T"5,Q</h
* @author treeroot FkaQVT
* @since 2006-2-2 <a CzB7x
* @version 1.0 *4 m]UK
*/ iLdUus!
public class HeapSort implements SortUtil.Sort{ x+sSmW
C B;j[.
/* (non-Javadoc) KjA7x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w^~s4Q_>>
*/ ;&b=>kPlZ
public void sort(int[] data) { m%U=:u7#M
MaxHeap h=new MaxHeap(); .:-*89c
h.init(data); i39_( )X
for(int i=0;i h.remove(); k]4CN
System.arraycopy(h.queue,1,data,0,data.length); z'Bvjul
} |}l/6WHB
`[=/f=Q}
private static class MaxHeap{ mv<cyWp
?zo7.R-Vac
void init(int[] data){ }m!T~XR</
this.queue=new int[data.length+1]; pE1uD4lLb
for(int i=0;i queue[++size]=data; *R&77 o7
fixUp(size); 1\jj3Y'i'
} lfoPFJ Z
} 8yr-X!eF
tjZS:@3 Z
private int size=0; }Ej^"T:H_;
@ /e{-Q
private int[] queue; 8v)Z/R-
kaZcYuT.9
public int get() { yrzyus
return queue[1]; Dmtsu2o
} %)}_OXWf:
ZA4sEVHW
public void remove() { `=TJw,q
SortUtil.swap(queue,1,size--); S{cK~sZj
fixDown(1); 'pAq;2AA
} *XXa9z
file://fixdown k%RQf0`T
private void fixDown(int k) { WAr6Dv,8
int j; ?AQR\)P
while ((j = k << 1) <= size) { C-2#-{<
if (j < size %26amp;%26amp; queue[j] j++; eET1f8B=L
if (queue[k]>queue[j]) file://不用交换 5IG#-Q(6sp
break; o>M&C X+j$
SortUtil.swap(queue,j,k); `yXHb
k = j; %H"AHkge:a
} _hB7;N3
} <XpG5vV
private void fixUp(int k) { AQ-R^kT
while (k > 1) { O sIvW'$\
int j = k >> 1; &53LJlL Co
if (queue[j]>queue[k]) G*VcAJ[
break; Yu%ZwTvw
SortUtil.swap(queue,j,k); =HoA2,R)
k = j; M/6q ^*
} `?"[u"*
} *fDhNmQ `
L{1PCs36c
} .|6Wmn-uS
gdBH\K(\
} a '<B0'
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SortUtil： p-8x>dmP(
{NIE:MXX
package org.rut.util.algorithm; ~<_PjV
~ Q;qRx
import org.rut.util.algorithm.support.BubbleSort; l;JB;0<s"
import org.rut.util.algorithm.support.HeapSort; "CQ:<$|$
import org.rut.util.algorithm.support.ImprovedMergeSort; /;1h-Rc>
import org.rut.util.algorithm.support.ImprovedQuickSort; z!9w Lo^r
import org.rut.util.algorithm.support.InsertSort; gDsb~>rb|
import org.rut.util.algorithm.support.MergeSort; /9u12R*<
import org.rut.util.algorithm.support.QuickSort; \g;-q9g;O
import org.rut.util.algorithm.support.SelectionSort; [M.!7+$o
import org.rut.util.algorithm.support.ShellSort; _%aJ/Y0Cy
P_c9v/
/** .ktyA+r8v
* @author treeroot SnW>`
* @since 2006-2-2 _$qH\>se
* @version 1.0 &FzZpH
*/ #.W<[KZf
public class SortUtil { jTz~ V&^
public final static int INSERT = 1; %wux#"8
public final static int BUBBLE = 2; .{#J2}+[_}
public final static int SELECTION = 3; 20RISj
public final static int SHELL = 4; RC]-9gd3Q
public final static int QUICK = 5; Hn,;G`{
public final static int IMPROVED_QUICK = 6; ^&8xfI6?
public final static int MERGE = 7; w`K=J!5y2g
public final static int IMPROVED_MERGE = 8; [Gb8o'
public final static int HEAP = 9; r`CsR0[
OM7EmMa;
public static void sort(int[] data) { ~@Eu4ip)F
sort(data, IMPROVED_QUICK); Hk|wO:7Be
} |"EQyV
private static String[] name={ 4] I7t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ??`zW
}; ],ISWb
w57D qG>
private static Sort[] impl=new Sort[]{ L(qQ,1VY
new InsertSort(), r5aOQ
new BubbleSort(), *U^7MU0
new SelectionSort(), Wi{ jC?2Q
new ShellSort(), EJ`"npU
new QuickSort(), (\NZ)Ys
new ImprovedQuickSort(), OAZ5I)D>
new MergeSort(), >FM2T<.;
new ImprovedMergeSort(), ;V\l, u
new HeapSort() s8 0$
}; ":N EI
uz;z+Bd^
public static String toString(int algorithm){ <2{-ey]
return name[algorithm-1]; ?T <2Cl'C
} u IGeSd5B
dBMr%6tz
public static void sort(int[] data, int algorithm) { r5g:#mF"
impl[algorithm-1].sort(data); #Rcb iV*M
} DF!*S{)
0_faJjTbP;
public static interface Sort { <mdHca
public void sort(int[] data); :NPnwX8w
} Rz9IjL.Z
f& >[$zh
public static void swap(int[] data, int i, int j) { a$ FO5%o
int temp = data; K_sHZ
data = data[j]; "xKykSk
data[j] = temp; ?B~S4:9
} gG6j>%y
} o\;cXuh