[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; XgbGC*dQ
} MvW>ktkU
int i1=l; KF'M4P
int i2=mid+1; x3P@AC$\
for(int cur=l;cur<=r;cur++){ esHiWHAC
if(i1==mid+1) Lg?'1dg
data[cur]=temp[i2++]; &-*nr/xT
else if(i2>r) t#q>U%!
data[cur]=temp[i1++]; K+}Z6_:
else if(temp[i1] data[cur]=temp[i1++]; C1/jA>XW
else %C)JmaQ{9
data[cur]=temp[i2++]; VZ,T`8"
} +doT^&2u*
} 42u\Y_^ID
vhHMxOZ;
} H6I #Xj
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改进后的归并排序: Z]Y4NO;
Q#N+5<]J)#
package org.rut.util.algorithm.support; Kzb@JBIF
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import org.rut.util.algorithm.SortUtil; OGFKc#
{X$Mwqhpp;
/** [*G2wP[$
* @author treeroot X W)A~wPBs
* @since 2006-2-2 gp HwiFc
* @version 1.0 Q8x{V_Pot
*/ 4I*Mc%dD
public class ImprovedMergeSort implements SortUtil.Sort { !`_f\
j 7URg>i0
private static final int THRESHOLD = 10; DKl7|zG4
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/* {9".o,
* (non-Javadoc) \DqxS=o;
* !P$xh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .@Uz/j?>
*/ 5@$4.BGcF
public void sort(int[] data) { 8~E)gV+v
int[] temp=new int[data.length]; 1RbYPX
mergeSort(data,temp,0,data.length-1); n*~
} P@YL.'KU)
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private void mergeSort(int[] data, int[] temp, int l, int r) { <y!r~?
int i, j, k; .4>s2
int mid = (l + r) / 2; t5X lR]` w
if (l == r) J~3T8e#
return; Uob|Q=MQ
if ((mid - l) >= THRESHOLD) Xp6*Y1Y
mergeSort(data, temp, l, mid); %uVJLz
else r)(BT:2m
insertSort(data, l, mid - l + 1); *t{c}Y&@
if ((r - mid) > THRESHOLD) oxQID
mergeSort(data, temp, mid + 1, r); WG !t!1p
else %D(prA_w
insertSort(data, mid + 1, r - mid); 8$ZSF92C
qYZ7Zt;
for (i = l; i <= mid; i++) { F9P0cGDs
temp = data; h5rP]dbhXU
} F.pHL)37
for (j = 1; j <= r - mid; j++) { >B/&V|E
temp[r - j + 1] = data[j + mid]; A}bHfn|
} C2rj]t
int a = temp[l]; H r^15
int b = temp[r]; iWM7,=1+
for (i = l, j = r, k = l; k <= r; k++) { '0')6zW5s
if (a < b) { ^[}0&_L w
data[k] = temp[i++]; cJ##K/es
a = temp; 4Sstg57x~
} else { N~; khS]
data[k] = temp[j--]; {L4>2rF
b = temp[j]; o1X/<.0+
} !N8)C@=
} Fy@#r+PgWp
} Kwl qi]~
bI]UO)
/** 2r}uE\GN
* @param data $wYuH9(
* @param l I0w@S7
* @param i #EmffVtY
*/ pO/SV6N
private void insertSort(int[] data, int start, int len) { O<dZA=Oez
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ok3
} `@$"L/AJ
} $]%<r?MUb-
} I*W9VhIOV
} a\&(Ua
1R2o6`_
堆排序： g/l0}%
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package org.rut.util.algorithm.support; -?aw^du
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import org.rut.util.algorithm.SortUtil; <RoX|zJw
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/** }+{*, z
* @author treeroot *>GIk`!wM
* @since 2006-2-2 ayH% qp
* @version 1.0 68p\WheCal
*/ I|F~HUzA"
public class HeapSort implements SortUtil.Sort{ KkdG.c'
jMf 7J
/* (non-Javadoc) Ez/\bE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ZSF=
*/ KH2F#[ !Lw
public void sort(int[] data) { lPRdwg-
MaxHeap h=new MaxHeap(); t,=@hs hN
h.init(data); }\`(m\2xo
for(int i=0;i h.remove(); BrNG%%n
System.arraycopy(h.queue,1,data,0,data.length); mJ8{lXq3!
} CJMaltPp&
r^w\9a_
private static class MaxHeap{ PPwxk;
H _Zo@y~J
void init(int[] data){ L.09\1?.n
this.queue=new int[data.length+1]; 1u"R=D9p,=
for(int i=0;i queue[++size]=data; F!OOrW]p0
fixUp(size); WFU?o[k-O
} ~K5Cr
} QL)>/%yU
H$~M`Y9I~
private int size=0; .k# N7[q=
:DZLjC
private int[] queue; S2J#b"Y
j~,h)C/v
public int get() { uY&=eQ_Cb
return queue[1]; hlAR[]
} w1wXTt
-W|*fKN`3
public void remove() { gB(9vhj$
SortUtil.swap(queue,1,size--); )^t!|*1LA
fixDown(1); wzD\8_;6N
} YHs?QsP
file://fixdown VDB$"T9#
private void fixDown(int k) { g~~m'^
int j; Q,zC_
while ((j = k << 1) <= size) { oJP<'l1
if (j < size %26amp;%26amp; queue[j] j++; x Z|&/Ci
if (queue[k]>queue[j]) file://不用交换 0-*Z<cu%l
break; sS C?io
SortUtil.swap(queue,j,k); 7<^'DOs
k = j; Y{,2X~ 7
} jMK3T
} 48wDf_<f5=
private void fixUp(int k) { ?sV[MsOsC
while (k > 1) { q#;BhPc
int j = k >> 1; <\h*Zy
if (queue[j]>queue[k]) {5SfE$r
break; / >%L[RJ4
SortUtil.swap(queue,j,k); ^rL,&rk
k = j; \0D$Mie
} ;U |NmC+
} d&hD[v
WS5A Y @(~
} pP3U,n
EY]a6@;
} >b'w'"
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SortUtil： Z #EvRC
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package org.rut.util.algorithm; UIn^_}jF`
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import org.rut.util.algorithm.support.BubbleSort; \4aKLr
import org.rut.util.algorithm.support.HeapSort; Khj=llo,
import org.rut.util.algorithm.support.ImprovedMergeSort; &RWM<6JP
import org.rut.util.algorithm.support.ImprovedQuickSort; .?f:Nb.O
import org.rut.util.algorithm.support.InsertSort; ^+M><jE9
import org.rut.util.algorithm.support.MergeSort; zHV|-R
import org.rut.util.algorithm.support.QuickSort; e[}],W
import org.rut.util.algorithm.support.SelectionSort; $R";
import org.rut.util.algorithm.support.ShellSort; C,.-Q"juH
>&1um5K
/** R3?:\d{
* @author treeroot @LcT-3u
* @since 2006-2-2 XoJgs$3B
* @version 1.0 $~=2{
*/ QhCY}Q?X
public class SortUtil { R>*g\}9Zh3
public final static int INSERT = 1; _#FIay\ahB
public final static int BUBBLE = 2; QNb>rLj52
public final static int SELECTION = 3; P% Q@9kO>
public final static int SHELL = 4; O4E(R?wd
public final static int QUICK = 5; ".E5t@ }?m
public final static int IMPROVED_QUICK = 6; dgslUg9z3g
public final static int MERGE = 7; kxh 5}eB
public final static int IMPROVED_MERGE = 8; o!utZmk$
public final static int HEAP = 9; .EG*+,
x{Sd P$
public static void sort(int[] data) { q`[K3p
sort(data, IMPROVED_QUICK); U. (Tl>K|0
} U{}!y3[wK
private static String[] name={ Px#$uU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]n5"Z,K
}; q & b5g !
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private static Sort[] impl=new Sort[]{ H|`R4hAk
new InsertSort(), FCiq?@
new BubbleSort(), } L <,eV
new SelectionSort(), G?/c/rG
new ShellSort(), 5B{k\H;
new QuickSort(), (Y2mmd
new ImprovedQuickSort(), .=XD)>$
new MergeSort(), Vho0eV=
new ImprovedMergeSort(), 9 mPIykAj8
new HeapSort() Mlj#b8
}; c#QFG1
N_G4_12(
public static String toString(int algorithm){ DjwQ`MA
return name[algorithm-1]; Hbk&6kS
} 6IP$n($2
mM5|K@0|
public static void sort(int[] data, int algorithm) { G52Z)^
impl[algorithm-1].sort(data); ]*;F. pZ
} M3(k'q7&:
c@(1:,R
public static interface Sort { s<&[\U
public void sort(int[] data); O!^; mhy"
} :<GfETIs
2+'|kt2
public static void swap(int[] data, int i, int j) { n3ZAF'
int temp = data; =Ndli>x}1
data = data[j]; -;pOh;WG
data[j] = temp; =nU/ [T.
} P^[/Qi}j
} 1b3(