[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; 5EDM?G
} :0pxacD"!
int i1=l; Y3jb'S4(
int i2=mid+1; DUiqt09`~
for(int cur=l;cur<=r;cur++){ QnikgV
if(i1==mid+1) "V:B-q
data[cur]=temp[i2++]; "(ehf|%>%
else if(i2>r) }' `2C$
data[cur]=temp[i1++]; A(#hyb#
else if(temp[i1] data[cur]=temp[i1++]; b9HE #*d,
else =rS z>l
data[cur]=temp[i2++]; -nG3(n&wB
} O&]Y.Z9,A
} +ib72j%A
R,01.N( U
} %(b`i C9
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改进后的归并排序: Nzz" w_#
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package org.rut.util.algorithm.support; r?d601(fa
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import org.rut.util.algorithm.SortUtil; NMY~f (x
uD_|/(
/** 39?iX'*p
* @author treeroot T$13"?sr=
* @since 2006-2-2 '.oEyZA;o
* @version 1.0 "2(4?P
*/ Y+ P\5G
public class ImprovedMergeSort implements SortUtil.Sort { r: n^U#
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private static final int THRESHOLD = 10; ]t]s/;9]K
N. 3 x[%:
/* z (rQ6
* (non-Javadoc) YD$fN"}-
* ;7&RmIXKh'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~^=QBwDW8N
*/ lKEdpF<
public void sort(int[] data) { XbYW,a@w2
int[] temp=new int[data.length]; ro7\}O:I
mergeSort(data,temp,0,data.length-1); yL&F!+(/Ix
} ? e%Pvy<i
X:+;d8rCy
private void mergeSort(int[] data, int[] temp, int l, int r) { E N%cjvE
int i, j, k; 1p>5ZkHb
int mid = (l + r) / 2; Z<z(;)?c
if (l == r) UceZWtYa
return; XX~~SvSM
if ((mid - l) >= THRESHOLD) Lm"l*j4
mergeSort(data, temp, l, mid); |eWlB\ x8
else e.n&Os<|<
insertSort(data, l, mid - l + 1); N54U [sy
if ((r - mid) > THRESHOLD) %0@Jm)K^
mergeSort(data, temp, mid + 1, r); Lm"a3Nb
else fZH:&EP
insertSort(data, mid + 1, r - mid); )(b]- )
PoY+Y3
for (i = l; i <= mid; i++) { >F6'^9|
temp = data; pUZe.S>G
} '>_'gR0O
for (j = 1; j <= r - mid; j++) { nRN&u4
temp[r - j + 1] = data[j + mid]; {,|*99V
} Z ) qc-~S
int a = temp[l]; h djv/
int b = temp[r]; bTE%p0
for (i = l, j = r, k = l; k <= r; k++) { "'-f?kZ
if (a < b) { >}GtmnF
data[k] = temp[i++]; vL{sk|2&
a = temp; X*1vIs;[@
} else { G%-[vk#]
data[k] = temp[j--]; Af1mTbf=
b = temp[j]; i[@*b/A
} {e0cc1Up}
} v/\l
} $fV47;U'*
]$!-%pNv
/** {LVii}<
* @param data { :'#Ts<
* @param l `$SX%AZA
* @param i )FGm5-K@
*/ Y~hBVz2g
private void insertSort(int[] data, int start, int len) { gI6./;;x
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Vq2d+ ,fb
} E(*RtOC<W
} l_FttN
} }Zc.rk
} |"?0H#
[>Z~&cm
堆排序： ,*%%BTnR
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package org.rut.util.algorithm.support; ir-srVoXy
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import org.rut.util.algorithm.SortUtil; ie{9zO<d
*KN'0Z@W
/** ZGf R:a)wc
* @author treeroot 3|8\,fO?
* @since 2006-2-2 Z\D!'FX
* @version 1.0 LJ`*&J
*/ R2yiExw<
public class HeapSort implements SortUtil.Sort{ c#|!^gjf
XzgJ@
/* (non-Javadoc) <Qu]m.z[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q+5g+9
*/ ^.aFns{wv
public void sort(int[] data) { ;*5$xs&=_Z
MaxHeap h=new MaxHeap(); w,> ceu/
h.init(data); xDG8C39qrs
for(int i=0;i h.remove(); gUwg\>UC
System.arraycopy(h.queue,1,data,0,data.length); b/HhGA0
} D/^yAfI
ZH;VEX
private static class MaxHeap{ Lqq RuKi
;D&FZ|`(u
void init(int[] data){ [Nbs{f^J=
this.queue=new int[data.length+1]; vx62u29m
for(int i=0;i queue[++size]=data; |RS9N_eRt
fixUp(size); c+,F)i^`
} ozwPtF5
} "MQy>mD6
b(+M/O>I
private int size=0; "bZ%1)+
4qXO8T#~J=
private int[] queue; $!%/Kk4M
9`]Gosz
public int get() { ~VYZu=p
return queue[1]; cw|3W]
} {z>fe }
S#_g/3w
public void remove() { ;NQ9A &$)
SortUtil.swap(queue,1,size--); 9z6-HZG'~<
fixDown(1); u:JD
} T1 >xw4uo
file://fixdown ?XN=Er^
private void fixDown(int k) { 8'[g?
int j; }5 ^2g!M
while ((j = k << 1) <= size) { n4\UoKq
if (j < size %26amp;%26amp; queue[j] j++; L"{qF<@V7&
if (queue[k]>queue[j]) file://不用交换 4v9jGwnzt
break; kk#%x#L[
SortUtil.swap(queue,j,k); R?Zv
k = j; EK`}?>'
} nb dm@
} w#mnab@
private void fixUp(int k) { 7.mY@
while (k > 1) { "`HkAW4GZa
int j = k >> 1; 4Bg"b/kF
if (queue[j]>queue[k]) [Z9 lxZ|
break; Tq{+9+
SortUtil.swap(queue,j,k); dZ}gf}.v
k = j; `Cq&;-u
} 9'+Eu)l:
} "g27|e?y
zGgPW
} p_%dH
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} 1oU/gm$7\q
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SortUtil： 9/2VU< K
AB(WK9o
package org.rut.util.algorithm; =2v/f_
z7TMg^9#
import org.rut.util.algorithm.support.BubbleSort; Io_bS+
import org.rut.util.algorithm.support.HeapSort; 8'XAZSd(
import org.rut.util.algorithm.support.ImprovedMergeSort; #C^)W/dP
import org.rut.util.algorithm.support.ImprovedQuickSort; @A32|p}
import org.rut.util.algorithm.support.InsertSort; fk%W07x!
import org.rut.util.algorithm.support.MergeSort; 1OI/!!t1$
import org.rut.util.algorithm.support.QuickSort; .5$"qb ?
import org.rut.util.algorithm.support.SelectionSort; ls[0X82F
import org.rut.util.algorithm.support.ShellSort; 3 UUOB.
(Yi1U~{:
/** DR]=\HQ
* @author treeroot >D]g:t@v
* @since 2006-2-2 ]90BIJ]*c
* @version 1.0 4^uQB(}Z
*/ +}3l$L'bY
public class SortUtil { u7||]|2
public final static int INSERT = 1; PY81MTv0;
public final static int BUBBLE = 2; (|O9L s7N
public final static int SELECTION = 3; %M)LC>c
public final static int SHELL = 4; rnAQwm-8O%
public final static int QUICK = 5; JR6r3W
public final static int IMPROVED_QUICK = 6; j-]`;&L
public final static int MERGE = 7; 7pPaHX8
public final static int IMPROVED_MERGE = 8; h;TN$ /
public final static int HEAP = 9; -sjyv/%_
)LC"rSNx%
public static void sort(int[] data) { /3Y\s&y
sort(data, IMPROVED_QUICK); |k.%e4
} }ejZk bP
private static String[] name={ tKS'#y!R
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $'*q]]
}; B^;"<2b*
+/+>:
private static Sort[] impl=new Sort[]{ P;8nC:zL
new InsertSort(), a gkw)#
new BubbleSort(), KBC?SxJSJc
new SelectionSort(), trx y3k;
new ShellSort(), ?Vre"6U
new QuickSort(), [D%(Y ~2
new ImprovedQuickSort(), ^(F@#zN}
new MergeSort(), 76oJCNY
new ImprovedMergeSort(), s5s'[<
new HeapSort() lcVZ 32MQ
}; uH{oJSrK
%eOO8^N
public static String toString(int algorithm){ gOy;6\/
return name[algorithm-1]; l+nT$IPF
} HPryq)z
<%4M\n
public static void sort(int[] data, int algorithm) { mNA=<O;i)'
impl[algorithm-1].sort(data); ;yu#Bs
} %T6 sm
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public static interface Sort { OLS/3c z
public void sort(int[] data); X aE;i57$l
} Z".Xroq~
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public static void swap(int[] data, int i, int j) { 6?(yMSKa
int temp = data; fI v?HD:j
data = data[j]; !!k^M"e2
data[j] = temp; p>N8g#G
} [$X^r<|P@
} emSky-{$u