[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; X*_ SHt
} :8GlyN<E
int i1=l; E=$7ieW
int i2=mid+1; niXHK$@5
for(int cur=l;cur<=r;cur++){ Iz 1*4@
if(i1==mid+1) l_UXrnm/N
data[cur]=temp[i2++]; rOs)B21/
else if(i2>r) u?F7L8q]
data[cur]=temp[i1++]; B.h0" vJ
else if(temp[i1] data[cur]=temp[i1++]; mvUVy1-c
else @hE7r-}]
data[cur]=temp[i2++]; kxcgOjrmI
} se4w~\/
} F! |TW6)gv
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} N )b|
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改进后的归并排序: gvow\9{|C
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package org.rut.util.algorithm.support; R^n* o
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import org.rut.util.algorithm.SortUtil; AT2NC6{M
8 /:X& &
/** mBYS"[S(
* @author treeroot JS<e`#c&
* @since 2006-2-2 okd ``vG
* @version 1.0 Dx9$H++6$X
*/ | 7t=\
public class ImprovedMergeSort implements SortUtil.Sort { )Mm;9UA
sa\|"IkD2
private static final int THRESHOLD = 10; Enq6K1@%G
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/* ,U} 5
* (non-Javadoc) @vVRF Z
* oyi7YRvwd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e<ism?WG
*/ (h'$3~
public void sort(int[] data) { [wXwKr
int[] temp=new int[data.length]; /6Jy'"+'0
mergeSort(data,temp,0,data.length-1); 3G:NZ)p
} ,"v)vTt
uIVTs9\
private void mergeSort(int[] data, int[] temp, int l, int r) { *!wO:<-
int i, j, k; D}k-2RM2k
int mid = (l + r) / 2; '#pMEVP
if (l == r) -(%ar%~Zd
return; p@!@^1j=
if ((mid - l) >= THRESHOLD) X#f+m) S
mergeSort(data, temp, l, mid); .=et{\
else USHlb#*
insertSort(data, l, mid - l + 1); $?CBX27AV
if ((r - mid) > THRESHOLD) qr<-eJf
mergeSort(data, temp, mid + 1, r); UH1S_:6
else &deZ
insertSort(data, mid + 1, r - mid); U{U:8==
RGx]DP$5G
for (i = l; i <= mid; i++) { ,6%hu|Y*
temp = data; .f?qUg
} L*SSv wSL
for (j = 1; j <= r - mid; j++) { vUodp#s
temp[r - j + 1] = data[j + mid]; O9Jx%tolF%
} YokZar2a0
int a = temp[l]; HL}sqcp
int b = temp[r]; o[Wagg.%
for (i = l, j = r, k = l; k <= r; k++) { G{&yzHAuae
if (a < b) { Mo?t[]L
data[k] = temp[i++]; D-2v>l_
a = temp; h1G*y
} else { Cnc\sMDJ\B
data[k] = temp[j--]; ,&zjOc_v
b = temp[j]; 01UR
} ^J*G%*
} {{4p{
} 1b %T_a
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/** p'uqh e X
* @param data t^bdi}[
* @param l S,)|~#5x
* @param i ` + n
*/ Zh fD`@>&
private void insertSort(int[] data, int start, int len) { ="'P=Xh!8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); J6^Ct
} &ttv4BC^r
} ^!v}
} XYxm8ee"j
} 4/-))F&s
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堆排序： r%m7YwXo
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package org.rut.util.algorithm.support; 4,*^QK
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import org.rut.util.algorithm.SortUtil; aJa^~*N/Aa
j~,LoGuPh
/** 8#d1}Y
* @author treeroot vwqN;|F
* @since 2006-2-2 kUaGok?
* @version 1.0 mC[U)` ey
*/ 9Qs"X7iH
public class HeapSort implements SortUtil.Sort{ _w5~/PbWt
PhI6dB`
/* (non-Javadoc) *3etxnQc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ek;&<Z_ ]
*/ BJ.8OU*9]S
public void sort(int[] data) { h<^:Nn
MaxHeap h=new MaxHeap(); U<,Kw6K
h.init(data); UmD-7Fd
for(int i=0;i h.remove(); %&=(,;d
System.arraycopy(h.queue,1,data,0,data.length); rJc)<OZjT
} G=bP<XF
8HRPJSO~g
private static class MaxHeap{ pJ*#aH[ySP
v(Zi;?c
void init(int[] data){ {i%xs#0h
this.queue=new int[data.length+1]; "aCb;2Rs
for(int i=0;i queue[++size]=data; CAo )v,f
fixUp(size); DP6{HR$L
} J PzQBc5e
} s eZ<52f2
*_).UAP.
private int size=0; gHh.|PysW
@;n$caw
private int[] queue; VgZaDd;
ID)gq_k[8,
public int get() { -C'X4C+
return queue[1]; c%LB|(@j{
} g<T`F
4{pemqS*
public void remove() { <%3SI.
SortUtil.swap(queue,1,size--); I\uB"Z{9
fixDown(1); ?"8A^ ^
} WO(&<(?
file://fixdown C"Y]W-Mgg
private void fixDown(int k) { xjhAAM
int j; W6xjqNU
while ((j = k << 1) <= size) { #L IsL
if (j < size %26amp;%26amp; queue[j] j++; xm10
if (queue[k]>queue[j]) file://不用交换 % 6hw
break; Y7t{4P
SortUtil.swap(queue,j,k); hte9l)
k = j; c>i*HN}Z|
} `7qp\vYL
} r?yJ
private void fixUp(int k) { ;Y|~!%2~
while (k > 1) { 5fx,rtY2sQ
int j = k >> 1; > v!c\
if (queue[j]>queue[k]) BQ}.+T\
break; >wS:3$Q
SortUtil.swap(queue,j,k); E#2k|TpH4
k = j; `w=H'"Zv
} dK;\`>8
} jme5'FR
3 cW"VrFy9
} g\{! 21M
:k )<1ua
} eZod}~J8
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SortUtil： B?ob{K@
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package org.rut.util.algorithm; 4d._Hd='
6[|<
import org.rut.util.algorithm.support.BubbleSort; ,f0g|5yDf
import org.rut.util.algorithm.support.HeapSort; //u76nQ
import org.rut.util.algorithm.support.ImprovedMergeSort; 7(g&z%
import org.rut.util.algorithm.support.ImprovedQuickSort; |UDD/e
import org.rut.util.algorithm.support.InsertSort; X>GY*XU
import org.rut.util.algorithm.support.MergeSort; +j: Ld(
import org.rut.util.algorithm.support.QuickSort; _t;VE06Xjs
import org.rut.util.algorithm.support.SelectionSort; V =aoB Z
import org.rut.util.algorithm.support.ShellSort; Y7V&zF{
1gy}E=noP
/** cYwC,\uF
* @author treeroot gL}Y5U+s
* @since 2006-2-2 Q.2nUT`
* @version 1.0 ,Ho.O7H
*/ I.0P7eA-
public class SortUtil { 4x{ti5Y0
public final static int INSERT = 1; S1= JdN
public final static int BUBBLE = 2; fQ.>G+0I>
public final static int SELECTION = 3; zcWxyLifl0
public final static int SHELL = 4; "gikX/Co=
public final static int QUICK = 5; D:vUy*
public final static int IMPROVED_QUICK = 6; lvJ{=~u
public final static int MERGE = 7; I+d(r"N1
public final static int IMPROVED_MERGE = 8; %PdYv _5
public final static int HEAP = 9; MVv^KezD
M@X#[w:
public static void sort(int[] data) { rHBjR_L.2
sort(data, IMPROVED_QUICK); 2T%f~yQ^
} ^?]H$e
private static String[] name={ ftH%, /,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TIhzMW\/K
}; _%Ld Ez
J9=0?^v-:B
private static Sort[] impl=new Sort[]{ JIKxY$GS
new InsertSort(), EM w(%}8w
new BubbleSort(), })SdaZ
new SelectionSort(), T_%]#M
new ShellSort(), 5 ^z ,'C
new QuickSort(), $(L7/M
new ImprovedQuickSort(), sfPN\^k2
new MergeSort(), 71&+dC
new ImprovedMergeSort(), gG;W:vR}l
new HeapSort() to|9)\
}; RZh)0S>J
NP'DuzC
public static String toString(int algorithm){ 4"(zi5`e
return name[algorithm-1]; OLup`~
} G(\1{"!
[]3}(8yxGb
public static void sort(int[] data, int algorithm) { v!h-h&p O7
impl[algorithm-1].sort(data); y/6LMAI
} |B$\3,
A y[L{!)2{
public static interface Sort { KmOa^vY1.T
public void sort(int[] data); xLK0~|_#!
} 'R'a/ZR`B7
j4r,_lH^r
public static void swap(int[] data, int i, int j) { -86:PL(I"
int temp = data; FF!g9>
data = data[j]; qML*Kwg
data[j] = temp; .%Q Ea_\
} ,4W((OQ^
} -?1J+}?