[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; gLL\F1|0x
} nPkZHIxuD
int i1=l; -Z^4L
int i2=mid+1; CkRX>)=py
for(int cur=l;cur<=r;cur++){ 1j\aH&)GH
if(i1==mid+1) _ jAo:K_Z
data[cur]=temp[i2++]; =C f(B<u
else if(i2>r) E4D (,s
data[cur]=temp[i1++]; ~SjZk|
else if(temp[i1] data[cur]=temp[i1++]; nMoWOP'
else Ra3ukYG[
data[cur]=temp[i2++]; !7U\J]
} ,}C8;/V
} }4nT.!5
A%vsno!
} AaN"7.Z/
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改进后的归并排序: PK&2h,Cu+
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package org.rut.util.algorithm.support; 4Z)DDz-}V
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import org.rut.util.algorithm.SortUtil; ACjf\4Q
GIv){[i
/** ]v5-~E!
* @author treeroot Y'Z+, CNf
* @since 2006-2-2 ~]8p_;\
* @version 1.0 ^ft]b2i
*/ l[/q%Ca'>
public class ImprovedMergeSort implements SortUtil.Sort { 6U,fz#<,}
d `j?7Z
private static final int THRESHOLD = 10; {5Eyr$
c-5jYwV
/* E/za@W
* (non-Javadoc) 8,o17}NY,
* 3AlqBXE"Z<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MFg'YA2/
*/ C%ytkzG_
public void sort(int[] data) { 5@XV6
int[] temp=new int[data.length]; hkW{88
mergeSort(data,temp,0,data.length-1); qSQ@p\O~
} ^p_u.P
zfjTQMaxh
private void mergeSort(int[] data, int[] temp, int l, int r) { &-GuKH(Y<
int i, j, k; (G4'(6
int mid = (l + r) / 2; <]8^J}8T{D
if (l == r) ?An,-N-ezf
return; [U_[</L7
if ((mid - l) >= THRESHOLD) 0k?Sq#7q
mergeSort(data, temp, l, mid); >$F:*lO
else XKq@]=\F
insertSort(data, l, mid - l + 1); Qa$NBNxKl
if ((r - mid) > THRESHOLD) v_sm
mergeSort(data, temp, mid + 1, r); 7aQcP
else 7nz!0I^
insertSort(data, mid + 1, r - mid); BDpF}
NygI67
for (i = l; i <= mid; i++) { >IR$e=5$
temp = data; *`KrVu 6s
} bV3lE6z
for (j = 1; j <= r - mid; j++) { Yjup
temp[r - j + 1] = data[j + mid]; wO"GtVd
} q{X T
int a = temp[l]; 7<yp"5><)
int b = temp[r]; {(\(m/!Z
for (i = l, j = r, k = l; k <= r; k++) { PZ34*q
if (a < b) { 7Qh_8M
data[k] = temp[i++]; K&UE0JO'
a = temp; B <+K<,S
} else { k!doIMj
data[k] = temp[j--]; (^H5EeGV{
b = temp[j]; m1e b8yX
} 9bn2UiJk
} ;,0lUcV
} 9Q@*0-
S?,_<GD)w
/** "2mFC!
* @param data +5*vABvCu
* @param l y`b\;kd
* @param i +v[O
*/ ?`A9(#ySM
private void insertSort(int[] data, int start, int len) { :^G%57NX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0VIZ=-e
} k_Tswf3
} <bdyAUeFw
} 9d"5wx
} l^,qO3ES
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堆排序： Qcgu`]7}
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package org.rut.util.algorithm.support; 6_U|(f
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import org.rut.util.algorithm.SortUtil; 2 `5=0E1k
n4>cERfa
/** gUGOHd(A
* @author treeroot S'?fJ.
* @since 2006-2-2 NQ!<f\m4n
* @version 1.0 J"bD\%
*/ ;\s~%~\
public class HeapSort implements SortUtil.Sort{ _:5=|2-E
6To:T[ z#
/* (non-Javadoc) DVzssPg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q5?L1
*/ 966<I56+
public void sort(int[] data) { JmjxGcG
MaxHeap h=new MaxHeap(); \ 522,n`
h.init(data); O!];_q/
for(int i=0;i h.remove(); ss; 5C:*y
System.arraycopy(h.queue,1,data,0,data.length); S*rO0s:
} `r]TA]DR
)]A9~H
private static class MaxHeap{ M1(9A>|nF
0h:G4
void init(int[] data){ K6(.KEW
this.queue=new int[data.length+1]; #7\b\~5
for(int i=0;i queue[++size]=data; ;[caiMA-
fixUp(size); 8{@`kyy|
} IM$0#2\
} j=Q$K#sBt
od(:Y(4
private int size=0; b=_{/F*b?
:p&IX"Hh
private int[] queue; <c\]Ct
NGj"ByVjx
public int get() { [Gf{f\O
return queue[1]; fwH`}<o
} ?k::tNv0
_iq2([BpL
public void remove() { JE9>8+
SortUtil.swap(queue,1,size--); U,38qKE
fixDown(1); \2Xx%SX
} vQy$[D*
file://fixdown 08O7F
private void fixDown(int k) { 3/l\ <{
int j; u6p5:oJj,
while ((j = k << 1) <= size) { ,,}sK
if (j < size %26amp;%26amp; queue[j] j++; ,wlbIl~
if (queue[k]>queue[j]) file://不用交换 1wbTqc
break; f^u^-l
SortUtil.swap(queue,j,k); J& )#G@fRX
k = j; Db,= 2e
} XW^8A77H
} Wk,6) jS=}
private void fixUp(int k) { i[8NO$tN1)
while (k > 1) { b^%?S8]h
int j = k >> 1; gjQ=8&i
if (queue[j]>queue[k]) vi<X3G6Xh
break; }/49T
SortUtil.swap(queue,j,k); ?n&$m
k = j; /_HwifRQ
} d>;2,srUf
} .P8-~?&M
) (+)Q'*
} }R`Irxv4
2H3(HZv
} K Ka c6Zj
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SortUtil： ^~, ndH{
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package org.rut.util.algorithm; KCl &H
hc6.#~i
import org.rut.util.algorithm.support.BubbleSort; @Mzz2&(dU
import org.rut.util.algorithm.support.HeapSort; ^J0zXe -d
import org.rut.util.algorithm.support.ImprovedMergeSort; l`G(O$ct
import org.rut.util.algorithm.support.ImprovedQuickSort; =p5?+3"@
import org.rut.util.algorithm.support.InsertSort; erXy>H[;
import org.rut.util.algorithm.support.MergeSort; Esb?U|F4
import org.rut.util.algorithm.support.QuickSort; y%2%^wF
import org.rut.util.algorithm.support.SelectionSort; D7M0NEY
import org.rut.util.algorithm.support.ShellSort; ^t`f1rGR
)&XnM69~b
/** q%DVDq( z
* @author treeroot Mq76]I%
* @since 2006-2-2 xkF$D:sP
* @version 1.0 jzMhJ
*/ ~c!Rx'
public class SortUtil { ot]>}[
public final static int INSERT = 1; x3gwG)Sf
public final static int BUBBLE = 2; \ibCR~W4
public final static int SELECTION = 3; 32s5-.{c/f
public final static int SHELL = 4; Is<x31R
public final static int QUICK = 5; >1m)%zt
public final static int IMPROVED_QUICK = 6; xnT3^ #-h
public final static int MERGE = 7; " \`BPN
public final static int IMPROVED_MERGE = 8; W0C{~|e
public final static int HEAP = 9; HgYc@P*b
@l)\?IEF@f
public static void sort(int[] data) { (rAiDRQ[
sort(data, IMPROVED_QUICK); )\D2\1e(c
} dFx2>6AZt
private static String[] name={ fV*}c`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Go-wAJ>
}; Y+!Ouc!$
wH+FFXGJs
private static Sort[] impl=new Sort[]{ 4=~ 9v
new InsertSort(), >'eB2
new BubbleSort(), Z+r%_|kZ
new SelectionSort(), mVa?aWpez
new ShellSort(), Q@7l"8#[t
new QuickSort(), nt drXg
new ImprovedQuickSort(), ,tcP=fdk]
new MergeSort(), "3\oQvi.
new ImprovedMergeSort(), | A3U@>6
new HeapSort() MRjH40"2
}; +{5JDyh0
1XqIPiXJ
public static String toString(int algorithm){ @c6"RHG9
return name[algorithm-1]; s.VUdR"
} fEHh]%GT`
}A^1q5
public static void sort(int[] data, int algorithm) { 7fap*
impl[algorithm-1].sort(data); c9\B[@-q
} os}b?I*K
wy,Jw3
public static interface Sort { wCV>F-
public void sort(int[] data); #L_@s d
} NS7@8 #C
F9Ifw><XM
public static void swap(int[] data, int i, int j) { N|UBaPS|o
int temp = data; )`B -O::
data = data[j]; <P+G7!KZ&
data[j] = temp; 0\?_lT2
} Aqa6R+c
} `%FIgE^