[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; 7^<{aE:
} Nay&cOz
int i1=l; S:YQVj
int i2=mid+1; dHO8 bYBH
for(int cur=l;cur<=r;cur++){ .sBwJZ
if(i1==mid+1) W^8MsdM
data[cur]=temp[i2++]; ^=.QQo||B
else if(i2>r) 8%Eemk>G{
data[cur]=temp[i1++]; Ax{C ^u
else if(temp[i1] data[cur]=temp[i1++]; 7%)KB4(\_
else BH3%dh:9
data[cur]=temp[i2++]; ;'i>^zX`
} <yg!D21Y
} B$D7}=|kc
8lZB3p]X
} @F/yc
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改进后的归并排序: :ND e<6?u
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package org.rut.util.algorithm.support; kPvR ,
8H@]v@Z2
import org.rut.util.algorithm.SortUtil; W"[Q=$2<<
RTQtXv6mD
/** -F~"W@9r
* @author treeroot 4uy:sCmu
* @since 2006-2-2 9ymx;
* @version 1.0 W\1V`\gF
*/ 2uT"LW/(H
public class ImprovedMergeSort implements SortUtil.Sort { 8D:0Vhx\I
Y:#nk.}>
private static final int THRESHOLD = 10; kT12
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/* Ra)AQ n
* (non-Javadoc) _/[}PQC6G
* ,qu7XFYrY
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z;Yo76P
*/ L{F[>^1Sb
public void sort(int[] data) { E E^lw61
int[] temp=new int[data.length]; DNu-Ce%
mergeSort(data,temp,0,data.length-1); HD!2|b~@
} eo&^~OVT
dBb &sA-A
private void mergeSort(int[] data, int[] temp, int l, int r) { 5lrjM^E|
int i, j, k; H63?Erh>a
int mid = (l + r) / 2; F1GFn|OA
if (l == r) p:?h)'bA<
return; r(OH
if ((mid - l) >= THRESHOLD) .8]buM5_G
mergeSort(data, temp, l, mid); ./@C
else K*9~g('
insertSort(data, l, mid - l + 1); q~6a$8+t
if ((r - mid) > THRESHOLD) }CGA)yK~3
mergeSort(data, temp, mid + 1, r); PfjD!=yS=h
else H84Zg/ ^
insertSort(data, mid + 1, r - mid); _X)`S"EsJ
|YcYWok
for (i = l; i <= mid; i++) { !$pnE:K
temp = data; 32z2c:G
} 8/"R&yAh
for (j = 1; j <= r - mid; j++) { #I}w$j i
temp[r - j + 1] = data[j + mid]; &hu3A)%
} ,R[<+!RS
int a = temp[l]; 6(8zt"E
int b = temp[r]; ZO8r8 [
for (i = l, j = r, k = l; k <= r; k++) { 'BX U'
if (a < b) { D $&6 8
data[k] = temp[i++]; r<OqI*7
a = temp; p>h}k_s
} else { #&,~5
data[k] = temp[j--]; ]=G dAW
b = temp[j]; ?%ei+
} TH>7XK<90M
} KmpKyc[
} =z*SzG
N~vK8j@
/** OICH:(t_
* @param data MmH(dp+
* @param l <Gj]XAoe%
* @param i avy@)iO7
*/ yW@YW_2;4
private void insertSort(int[] data, int start, int len) { @S)p{T5G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4|h>.^
} 8SOfX^;o
} hh8U/dVk*
} Q5 =
} [PH56f
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堆排序： CF]#0*MI
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package org.rut.util.algorithm.support; >A>_UT_"
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import org.rut.util.algorithm.SortUtil; I/_,24[
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/** (V<pz2\
* @author treeroot &I7T?
* @since 2006-2-2 '<1Q;3Ho
* @version 1.0 6F; |x
*/ 4$^rzAi5
public class HeapSort implements SortUtil.Sort{ :RDQP
d;v<rw
/* (non-Javadoc) .(Tf$V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4XNkto
*/ seiE2F[
public void sort(int[] data) { `teaE7^Wm
MaxHeap h=new MaxHeap(); %ZTI ?a
h.init(data); ?6_U>d{
for(int i=0;i h.remove(); pGP$2
System.arraycopy(h.queue,1,data,0,data.length); u&<NBxY
} \4Z"s[8}
EfqC_,J*3
private static class MaxHeap{ 4\y>pXML-U
DAQozhP8
void init(int[] data){ :~\ y<
this.queue=new int[data.length+1]; p!7(ayu
for(int i=0;i queue[++size]=data; S4D~`"4$/
fixUp(size); 8X)1bNGqhe
} ,lQfsntk'
} cB_3~=fV
9 =D13s(C
private int size=0; 3Y=uBl
I&>5b7Uf
private int[] queue; cdTG ]n
ALt^@|!d
public int get() { uO4R5F|tL
return queue[1]; Y0g6zHk7
} zv~b-Tp
<ELqj2`c
public void remove() { O6]X\Cwj%
SortUtil.swap(queue,1,size--); `3L?x8g
fixDown(1); Qk8YR5K
} 8_{XrTw(
file://fixdown {jo"@&2S
private void fixDown(int k) { ZmZ7E]c
int j; r?}L^bK
while ((j = k << 1) <= size) { -z'6.IcO
if (j < size %26amp;%26amp; queue[j] j++; # N'_~:H
if (queue[k]>queue[j]) file://不用交换 vjd;*ORB
break; [t"#4[
SortUtil.swap(queue,j,k); )w0K2&)A
k = j; hSXZu?/
} UB7C,:"
} Xagz(tm/
private void fixUp(int k) { VV"1IR
while (k > 1) { \= Wrh3
int j = k >> 1; !uN_<!
if (queue[j]>queue[k]) c1h?aP
break; L87=*_!B;
SortUtil.swap(queue,j,k); %i@Jw
k = j; ~i=5NUE
} X@Yl<9|i
} !==C@cH<N
zqm/<]A*l
} ;c|G
4n/CSAT1
} 8[d6 s
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SortUtil： I=|}%WO#
H#B97IGT
package org.rut.util.algorithm; P|;=dX#-
(z^987G
import org.rut.util.algorithm.support.BubbleSort; J(kC
import org.rut.util.algorithm.support.HeapSort; ZCDcf
import org.rut.util.algorithm.support.ImprovedMergeSort; gkld}t*U
import org.rut.util.algorithm.support.ImprovedQuickSort; m ?jF:]^
import org.rut.util.algorithm.support.InsertSort; E\XD~
import org.rut.util.algorithm.support.MergeSort; |1UJKJwX
import org.rut.util.algorithm.support.QuickSort; 92g&,Wb
import org.rut.util.algorithm.support.SelectionSort; kXW$[R
import org.rut.util.algorithm.support.ShellSort; W)2ZeH*
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/** CxJH)H$
* @author treeroot mH7Mch| m
* @since 2006-2-2 h;t5v6["
* @version 1.0 Kr74|W=
*/ rB.LG'GG]
public class SortUtil { W(jP??up
public final static int INSERT = 1; ItwJL`
public final static int BUBBLE = 2; )k&!&
public final static int SELECTION = 3; "U iv[8B
public final static int SHELL = 4; \-RVPa8k
public final static int QUICK = 5; kcZz WG|n
public final static int IMPROVED_QUICK = 6; 5 DvD
public final static int MERGE = 7; #<gD@Jybu
public final static int IMPROVED_MERGE = 8; nHIW_+<Mf
public final static int HEAP = 9; Schvwlm~i
7=pJ)4;ZA
public static void sort(int[] data) { kT4Oal+4
sort(data, IMPROVED_QUICK); a'YK1QX
} |v= */e
private static String[] name={ |Whkq/Zg
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !T1)tGrH
}; H(ds
~19&s~
private static Sort[] impl=new Sort[]{ 9Xeg&Z|!
new InsertSort(), ?V(h@T
new BubbleSort(), $s!2D"wl n
new SelectionSort(), K)TMr"j\
new ShellSort(), NEcE-7aT
new QuickSort(), zn/b\X/
new ImprovedQuickSort(), Q5/BEUkC
new MergeSort(), gshgl3
new ImprovedMergeSort(), b[ .pD3
new HeapSort() ]B9Ut&mF;
}; #mH4\s
Oh/2$72
public static String toString(int algorithm){ '{:lP"\,L
return name[algorithm-1]; 75RQ\_zDu
} Hy#<fKz`!
P> ilRb
public static void sort(int[] data, int algorithm) { d/&~IR
impl[algorithm-1].sort(data); SMbhJ}\O
} y<*/\]t9L[
V"Y-|R
public static interface Sort { +4m~D`fqt[
public void sort(int[] data); uz[5h0c
} mNnt9F3Eq
d9yfSZ
public static void swap(int[] data, int i, int j) { ,|Lf6k
int temp = data; 7Un5Y[FZo
data = data[j]; _J-3{a
data[j] = temp; `T~~yM)q
} kc}&\y
} S$1dXXT