[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; +I3j2u8L
} i0nu5kD+d
int i1=l; nT :n>ja
int i2=mid+1; W#&BU-|2
for(int cur=l;cur<=r;cur++){ X'{o/U.
if(i1==mid+1) ?U+nR/H:6
data[cur]=temp[i2++]; DGbEQiX$\
else if(i2>r) !?)aZ |r
data[cur]=temp[i1++]; I;Pd}A_}=_
else if(temp[i1] data[cur]=temp[i1++]; qh|fq b
else 6t=)1T
data[cur]=temp[i2++]; .WLwAL
} RiG]-K:
} #+&"m7 s
} `Cc-X7
} <!=:{&d%
GC`/\~TM
改进后的归并排序: ;Wgkf_3
MzMVs3w|
package org.rut.util.algorithm.support; wEZieHw
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import org.rut.util.algorithm.SortUtil; bgeJVI
MFn\[J`Ra
/** qnFg7X>C,
* @author treeroot c+{ ar^)*
* @since 2006-2-2 ` ZBOaN^if
* @version 1.0 ^EJ]LNk}
*/ @ 3rJ$6W
public class ImprovedMergeSort implements SortUtil.Sort { 3"Zc|Ck <?
O"}O~lZ[6T
private static final int THRESHOLD = 10; +w?-#M#
ka@yQV
/* %$_Y"82
* (non-Javadoc) QtA@p
* MxOIe|=&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F9k}zAY\J
*/ 4C[kj
public void sort(int[] data) { ?$MO!
int[] temp=new int[data.length]; Rrrq>{D
mergeSort(data,temp,0,data.length-1); 4-BrE&2f
} {A~3/M%74;
87F]a3
private void mergeSort(int[] data, int[] temp, int l, int r) { e=+q*]>
int i, j, k; G\R6=K:f7
int mid = (l + r) / 2; %Z8wUG
if (l == r) jx'hxC'3
return; 1{Ik.O)
if ((mid - l) >= THRESHOLD) @=OX7zq\h-
mergeSort(data, temp, l, mid); _7b4+ L
else dVMLn4[,MA
insertSort(data, l, mid - l + 1); >>c%Ic
if ((r - mid) > THRESHOLD) (coaGQ@d
mergeSort(data, temp, mid + 1, r); cv;2zq=T
else Yfx?3
insertSort(data, mid + 1, r - mid); &14xYpD<
)-m/(-
for (i = l; i <= mid; i++) { ,#bT
temp = data; ^fV-m&F)K*
} 85q!FpuH
for (j = 1; j <= r - mid; j++) { `_sKR,LhB
temp[r - j + 1] = data[j + mid]; XqGa]/;}
} cSjX/%*!m
int a = temp[l]; xt6%[)
int b = temp[r]; cd`P'GDF
for (i = l, j = r, k = l; k <= r; k++) { g'Wr+(A_
if (a < b) { Z5g*'
data[k] = temp[i++]; U] P{~
a = temp; <kJ`qbOU
} else { |9Y~k,rF
data[k] = temp[j--]; hY/qMK5
b = temp[j]; Kpkpr`:)]
} 9VMk?
} >3,}^`l
} @YVla!5O@
(G~ME>
/** _C=01 %/
* @param data _88X-~.
* @param l OKAmw>{
* @param i 21my9Ui]
*/ wb%4f6i
private void insertSort(int[] data, int start, int len) { Ce~Pms]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V+zn` \a
} +Ht(_+To1
} ~>Y^?l
} {L \TO,
} sX]gL
zCv)%y
堆排序： (1[Z#y[
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package org.rut.util.algorithm.support; XtE O)
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import org.rut.util.algorithm.SortUtil; nkz<t
Z{gDEo)
/** |WNI[49
* @author treeroot F$'po#
* @since 2006-2-2 KO/#t~
* @version 1.0 6\Tq,I7
*/ @V&HE:P
public class HeapSort implements SortUtil.Sort{ _Ea1;dJmq
IpM"k)HR
/* (non-Javadoc) )NTpb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iVo-z#
*/ eep/96G ?
public void sort(int[] data) { %TO&
MaxHeap h=new MaxHeap(); VF+g+~
h.init(data); q^uCZnkb=
for(int i=0;i h.remove(); NZlCn:"
System.arraycopy(h.queue,1,data,0,data.length); [!Djs![O
} -0I&dG-
[x- 9m\h
private static class MaxHeap{ 1@}<CWE9
ftQ;$@
void init(int[] data){ HG)$W
this.queue=new int[data.length+1]; 'Hgk$Im+
for(int i=0;i queue[++size]=data; /`t}5U>S_
fixUp(size); 0X$2~jV>
} a/3yn9`sQ
} "yl6WG#J
>jnx2$
private int size=0; N8,g~?r^
"Z~@"JLb%
private int[] queue; t3*.Bm:^
F=PBEaX
public int get() { QIdml*Np?H
return queue[1]; %$bhg&}
} NBAOVYK
zn0%%x+!g
public void remove() { @:@5BCs<
SortUtil.swap(queue,1,size--); e.Q'l/g
fixDown(1); %s;5
} s2F[v:|Wq
file://fixdown /XNC^!z6Js
private void fixDown(int k) { -S&d5(R
int j; Zqv
while ((j = k << 1) <= size) { ,s6lB0
if (j < size %26amp;%26amp; queue[j] j++; B,` `2\B
if (queue[k]>queue[j]) file://不用交换 N7GZ'-t^Er
break; HdTB[(
SortUtil.swap(queue,j,k); b8[ ayy
k = j; -~*kAh
} !Q,Dzv"7
} cY+n 6k5
private void fixUp(int k) { /(9.Fqe(
while (k > 1) { bZZ_yc
int j = k >> 1; mnw(x#%P
if (queue[j]>queue[k]) J3/e;5w2Z
break; gc b8eB,
SortUtil.swap(queue,j,k); fp`m>} -
k = j; n?S)H=
} R*lq.7
} KM[&WT
G @]n(\7Y
} 'R#MH
]ki) (Bb
} dnM.
uH7!)LE#
SortUtil： Dc 84^>l
dKevhm)R"
package org.rut.util.algorithm; 5A%Uv*
]vw%J ^7:a
import org.rut.util.algorithm.support.BubbleSort; FTzc,6
import org.rut.util.algorithm.support.HeapSort; uTdz$Nh
import org.rut.util.algorithm.support.ImprovedMergeSort; !Q}Bz*Y
import org.rut.util.algorithm.support.ImprovedQuickSort; iQgr8[ SFf
import org.rut.util.algorithm.support.InsertSort; +(`.pa z@
import org.rut.util.algorithm.support.MergeSort; %WqUZ+yy
import org.rut.util.algorithm.support.QuickSort; vrh2}biCR
import org.rut.util.algorithm.support.SelectionSort; #WE lL2&
import org.rut.util.algorithm.support.ShellSort; i3)7Qa[
|Qpd<L
/** g6$\i m
* @author treeroot _s:5)
* @since 2006-2-2 ) bd`U
* @version 1.0 Yf1%7+V35
*/ 8M]QDgd.
public class SortUtil { }0>\%C
public final static int INSERT = 1; @Hr1.f
public final static int BUBBLE = 2; kLXa1^Lq
public final static int SELECTION = 3; J:IAs:e`
public final static int SHELL = 4; A6xN6{R!
public final static int QUICK = 5; tItI^]w2s
public final static int IMPROVED_QUICK = 6; B"`86qc
public final static int MERGE = 7; d6zq,x!cI
public final static int IMPROVED_MERGE = 8; %][zn$aa|
public final static int HEAP = 9; ;g?o~ev 8
x4`|[
public static void sort(int[] data) { k`\L-*:Ji
sort(data, IMPROVED_QUICK); +xU=7chA
} 7c<_j55(
private static String[] name={ >#`{(^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K]^Jl0
}; XAB/S8e
#8%~u+"N
private static Sort[] impl=new Sort[]{ 821 6_Qm
new InsertSort(), P` Gb}]rW
new BubbleSort(), 0OnqKgf
new SelectionSort(), }_Y\6fcd
new ShellSort(), a,:Nlr3
new QuickSort(), Sg(\+j=
new ImprovedQuickSort(), _+Uf5,.5yU
new MergeSort(), {>Qs+]
new ImprovedMergeSort(), Bi0&F1ZC!
new HeapSort() vCtnjWGX}/
}; \.F|c
1R]h>'
public static String toString(int algorithm){ q1A0-W#4
return name[algorithm-1]; "rrE_
} iE]^6i
@y|JIBBRc
public static void sort(int[] data, int algorithm) { :Yi 4Ia
impl[algorithm-1].sort(data); "msPH<D
} w-Q=oEt
R78P](1\>
public static interface Sort { !OOOc
public void sort(int[] data); /~g.j1g
} d:hX3
+('=RyoT
public static void swap(int[] data, int i, int j) { #-PUm0|
int temp = data; g{hbq[>X]
data = data[j]; D&6.> wt .
data[j] = temp; #* 8^ar<
} {!pYQ|#
} x139Ckn