[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; fN;y\!q5
} u]-$]zIH
int i1=l; \!Pm^FD .
int i2=mid+1; wvY$s;
for(int cur=l;cur<=r;cur++){ T8k oP
if(i1==mid+1) &[xJfL
data[cur]=temp[i2++]; NU"X*g-x^
else if(i2>r) EY(4<;)
data[cur]=temp[i1++]; 0jMrL\>C
else if(temp[i1] data[cur]=temp[i1++]; Ft7l/
else DoA f,9|_
data[cur]=temp[i2++]; IFe[3mB5
} -#h \8Xl
} lU3wIB
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} J<D =\
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改进后的归并排序: ! >V1zk
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package org.rut.util.algorithm.support; na>B{6
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import org.rut.util.algorithm.SortUtil; >"b"K{t
O4{&B@!
/** O1PdM52
* @author treeroot [ q}WS5Cp
* @since 2006-2-2 7O j9~3o4
* @version 1.0 |tkmO:
*/ ,;g:qe3D$
public class ImprovedMergeSort implements SortUtil.Sort { l\)Q3.w
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private static final int THRESHOLD = 10; Fwtwf{9I
~Km8-b(&
/* Z2r\aZ-d`
* (non-Javadoc) `1dr$U
* b`' ;`*AN+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Mmn[ol
*/ ) PtaX|U
public void sort(int[] data) { +4 dHaj6
int[] temp=new int[data.length]; e3.TGv7=
mergeSort(data,temp,0,data.length-1); ;6Z?O_zp4
} SJfsFi?n
ZWv$K0agu
private void mergeSort(int[] data, int[] temp, int l, int r) { ;1WclQ!(
int i, j, k; UA^E^$f:
int mid = (l + r) / 2; 7G(X:!
if (l == r) E^s>S,U[y
return; Nz8iU@!a
if ((mid - l) >= THRESHOLD) Pj$a$C`Z
mergeSort(data, temp, l, mid); =0A{z#6
else M&L"yQA
insertSort(data, l, mid - l + 1); ]pb3 Fm{
if ((r - mid) > THRESHOLD) *|'k
mergeSort(data, temp, mid + 1, r); '5IJ;4k
else "o`( kYSF
insertSort(data, mid + 1, r - mid); YV9%^ZaN7
p[RD[&#b
for (i = l; i <= mid; i++) { B{Rig5Sc
temp = data; iJcl0)|
} rW6LMkt72
for (j = 1; j <= r - mid; j++) { QH;aJ(>$
temp[r - j + 1] = data[j + mid]; =1D*K%
} 0x84 Ah)
int a = temp[l]; }w$/x<Q[
int b = temp[r]; '(Pbz
for (i = l, j = r, k = l; k <= r; k++) { p^2pv{by
if (a < b) { ~0`Pe{^*
data[k] = temp[i++]; Z`[j;=[
a = temp; 0xsvxH"*
} else { 3x#G SS
data[k] = temp[j--]; zx^)Qb/EL6
b = temp[j]; IQ\`n|
} 7Sokn?~i
} $iV3>>;eh
} IBR;q[Dj}
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/** .!&YO/
* @param data i^=an?}/
* @param l 1oC/W?l^
* @param i uzsR*x%s-
*/ 6rk/74gI,a
private void insertSort(int[] data, int start, int len) { `ul"D%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8`*(lKiL
} #)XO,^s.
} r`lgK2r\
} sbgRl%
} ;qvZ*
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堆排序： >$}nKPC,Y
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package org.rut.util.algorithm.support; ;$Wa=wHb
gxJ(u{2
import org.rut.util.algorithm.SortUtil; X(bb1
&Zov9o:gx
/** :QN,T3i'/3
* @author treeroot \4V'NTjB
* @since 2006-2-2 vWow^g
* @version 1.0 MjHeUf
*/ ]TGJ|X
public class HeapSort implements SortUtil.Sort{ :D&QGw(n
bju0l[;=
/* (non-Javadoc) fY>\VY$>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,u$$w
*/ |%$d/<<PZ
public void sort(int[] data) { p/@z4TCNX
MaxHeap h=new MaxHeap(); Yd]f}5F
h.init(data); b\}`L"
for(int i=0;i h.remove(); "|f;
System.arraycopy(h.queue,1,data,0,data.length); m|p}Jf!
} }V`Fz',lZ
Q&wBX%@^L
private static class MaxHeap{ S!rUdxO
7/Ew(X8Fs
void init(int[] data){ CvlAn7r,@
this.queue=new int[data.length+1]; )M1.>?b
for(int i=0;i queue[++size]=data; K":-zS
fixUp(size); XfB;^y=u8
} 2 !{P<
} y#r=^r]l)
qD2<-E&M/
private int size=0; U;ev3
#LF_*a0v
private int[] queue; 1`b?nX
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public int get() { G.L4l|%W
return queue[1]; {Ke3
} i^j{l_-JE
W&GDE
public void remove() { x'}{^'}/
SortUtil.swap(queue,1,size--); m`n51i{U
fixDown(1); !5x"d7
} F YcC2TM
file://fixdown |Y:T3hra61
private void fixDown(int k) { #[J..i/h
int j; AX[/S8|6
while ((j = k << 1) <= size) { G>cTqD6gT
if (j < size %26amp;%26amp; queue[j] j++; `lr\V;o!
if (queue[k]>queue[j]) file://不用交换 Jg^tr>I~
break; SxMh '
SortUtil.swap(queue,j,k); I#9A\.pO
k = j; UT"L5{c
} A9F Z`
} @"Do8p!*(6
private void fixUp(int k) { ]kc]YO7i%R
while (k > 1) { P%.9g
int j = k >> 1; z.#gpTXD
if (queue[j]>queue[k]) D4_D{\xhO
break; +BmA4/P$
SortUtil.swap(queue,j,k); df}B:?Ew.
k = j; fyT!/
} IiSO{
} 3vDV
;9d(GP}eE
} V.;0F%zks5
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} QTM+WD
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SortUtil： URY%+u
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package org.rut.util.algorithm; 3 nb3rHQ
!i{@B
import org.rut.util.algorithm.support.BubbleSort; nbhx2@Teqe
import org.rut.util.algorithm.support.HeapSort; n0nkv[
import org.rut.util.algorithm.support.ImprovedMergeSort; 9NKZE?5P|D
import org.rut.util.algorithm.support.ImprovedQuickSort; HH8a"Hq)
import org.rut.util.algorithm.support.InsertSort; _/7[=e}y
import org.rut.util.algorithm.support.MergeSort; tlG&PVvr
import org.rut.util.algorithm.support.QuickSort; ;v#~o*
import org.rut.util.algorithm.support.SelectionSort; fH}`
import org.rut.util.algorithm.support.ShellSort; m&b!\"0
.b5B7x}
/** d7P| x
* @author treeroot n8J';F =P
* @since 2006-2-2 [96|xe\s
* @version 1.0 7?b'"X"
*/ Kq{9:G
public class SortUtil { 4TUe*F@ ML
public final static int INSERT = 1; Z3"f7l6
public final static int BUBBLE = 2; Ix-FJF-
public final static int SELECTION = 3; {U7j
public final static int SHELL = 4; X2Y-TET
public final static int QUICK = 5; amgYr$)m
public final static int IMPROVED_QUICK = 6; NcRY Ch
public final static int MERGE = 7; SbrBlP:G
public final static int IMPROVED_MERGE = 8; >e"1a/2%>&
public final static int HEAP = 9; H?M8j] R-)
r's4-\
public static void sort(int[] data) { 8V.x%T
sort(data, IMPROVED_QUICK); 4e1Zyi!
} rQ.j$U
private static String[] name={ O zY&^:>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ytr~} M%
}; bQEQHqY5
/tx_I(6F?|
private static Sort[] impl=new Sort[]{ &&TQ0w&T
new InsertSort(), ad }^Dj/
new BubbleSort(), b[VP"KZ?
new SelectionSort(), .,UpI|b
new ShellSort(), rEz=\yY^j'
new QuickSort(), W/xb[w9v
new ImprovedQuickSort(), ,]1K^UeZ
new MergeSort(), !dStl:B
new ImprovedMergeSort(), (H0nO7Bk
new HeapSort() zd"o #(sv
}; ~{oM&I|d8
-0Y8/6](
public static String toString(int algorithm){ <wc=SMmO
return name[algorithm-1]; ?,TON5Fl-
} jats)!:
9Jaek_A`
public static void sort(int[] data, int algorithm) { X{<j%PdC
impl[algorithm-1].sort(data); OV Iu&6#
} p7Gs
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public static interface Sort { IgQW 5E#
public void sort(int[] data); &-s!ko4z
} [uW{Ap~2
@tRq(*(/:
public static void swap(int[] data, int i, int j) { 2U)H2%
int temp = data; k g0Z(T:&8
data = data[j]; 'l!tQD!
data[j] = temp; p8Ts5n
} WwPfz<I
} J*A<F'^F1