[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; Uyr3dN%*r
} fiN3xP]V
int i1=l; p/ >`[I
int i2=mid+1; $<|lE/_]
for(int cur=l;cur<=r;cur++){ ?cEskafb>
if(i1==mid+1) 3#45m+D
data[cur]=temp[i2++]; I]y.8~xs
else if(i2>r) %9#gB
data[cur]=temp[i1++]; :BGA.
else if(temp[i1] data[cur]=temp[i1++]; cl*PFQp9j
else @M8|(N%
data[cur]=temp[i2++]; 2JS`Wqy
} r]Ff{la5
} @hImk`&[N
#vqo -y7@
} KyO8A2'U
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改进后的归并排序: =FT98H2*|
z]bwnJfd
package org.rut.util.algorithm.support; {gaai
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import org.rut.util.algorithm.SortUtil; |fY/i] Ax
KB!|B.ChN(
/** ;eZ#bjw-d
* @author treeroot e~T@~(fft
* @since 2006-2-2 ;u(Du-Os!
* @version 1.0 OLj\-w^
*/ UYtuED
public class ImprovedMergeSort implements SortUtil.Sort { aRJ>6Q}
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private static final int THRESHOLD = 10; xlR2|4|8
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/* 2.X"f
* (non-Javadoc) UP{j5gR:_
* mG1IQ!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @MK"X}3
*/ rBN)a"
public void sort(int[] data) { G^1b>K
int[] temp=new int[data.length]; vkRi5!bR
mergeSort(data,temp,0,data.length-1); :p4"IeKs
} j9/-"dTL
1]T`n/d V
private void mergeSort(int[] data, int[] temp, int l, int r) { ,[nm_^R*\
int i, j, k; S-nlr@w8
int mid = (l + r) / 2; :9|W#d{o
if (l == r) j` /&r*zNq
return; [;b=A
if ((mid - l) >= THRESHOLD) kV Rn`n0
mergeSort(data, temp, l, mid); /+3a n9h
else V=:_d,
insertSort(data, l, mid - l + 1); pNE(n4v
if ((r - mid) > THRESHOLD) ~/tKMS6T
mergeSort(data, temp, mid + 1, r); Bfv.$u00p
else U^Tp6vN d
insertSort(data, mid + 1, r - mid); Pu>N_^ C
W];EKj,3W
for (i = l; i <= mid; i++) { &wetzC)
temp = data; r CRgzC
} k 2%S`/:
for (j = 1; j <= r - mid; j++) { G8Y+w
temp[r - j + 1] = data[j + mid]; cxYfZ4++m
} ]> Y/r-!
int a = temp[l]; lKEa)KF[
int b = temp[r]; Y#01o&f0n
for (i = l, j = r, k = l; k <= r; k++) { 8)\M:s~7&
if (a < b) { qOG}[%<^n7
data[k] = temp[i++]; [W,-1.$!dM
a = temp; n|4;Hn1V
} else { hD<f3_k
data[k] = temp[j--]; XL}<1-}
b = temp[j]; L6i|:D32p
} %E27.$E_
} ~-F?Mc
} uC]Z8&+obb
7=*VpX1
/** |H ;+1
* @param data 7XyOB+aQO
* @param l 4o9$bv
* @param i I2HT2c$
*/ Cj;/Uhs
private void insertSort(int[] data, int start, int len) { rFL$QC2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 396R$\q
} .%0ne:5
} Z]:BYX'
} u&TdWZe
} $X+u={]
u:`y]
堆排序： =<<3Pkv7@
e"+dTq8W
package org.rut.util.algorithm.support; hQgN9S5P
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import org.rut.util.algorithm.SortUtil; 3#<*k>1G?
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/** QlW=_Ymv{
* @author treeroot <kD#SV%"
* @since 2006-2-2 y?N Nz0
* @version 1.0 p#_[
*/ `!w^0kZ
public class HeapSort implements SortUtil.Sort{ 8t.dPy<
N)43};e
/* (non-Javadoc) =V^@%YIn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i|\{\d
*/ a]VGUW-
public void sort(int[] data) { @5}gsC
MaxHeap h=new MaxHeap(); S@:B6](D$
h.init(data); U 0ZB^`
for(int i=0;i h.remove(); :LV.G0)#
System.arraycopy(h.queue,1,data,0,data.length); <Ns &b.\h6
} >v0:qN7|
Uk-HP\C"7
private static class MaxHeap{ BGjb`U#%3
ZxS&4>.
void init(int[] data){ 3DoRE2}
this.queue=new int[data.length+1]; ~/`X*n&
for(int i=0;i queue[++size]=data; WSI Xj5R
fixUp(size); (Imp $
} jFj~]]j
} vg5NY =O
B2hfD-h,>
private int size=0; P&t;WPZ
H(\V+@~>AD
private int[] queue; b4~H3|
H,>#|F
public int get() { 'H=weH
return queue[1]; i;lE5
} &jJckT
=FBIrw{w
public void remove() { 6f}e+80
SortUtil.swap(queue,1,size--); )DZTB
fixDown(1); 1-$P0
} Tj,2r]g`<
file://fixdown v'nHFC+p
private void fixDown(int k) { b]`^KTYK
int j; Jqg3.2q
while ((j = k << 1) <= size) { aW@oE ~`
if (j < size %26amp;%26amp; queue[j] j++; PqhlXqX9
if (queue[k]>queue[j]) file://不用交换 VBx,iuaw
break; s-Y+x
SortUtil.swap(queue,j,k); A!;meVUs
k = j; MCAXt1sL&E
} Wg1tip8s
} ${e&A^h
private void fixUp(int k) { q$^<zY
while (k > 1) { M1uP\Sa
int j = k >> 1; ~.Q4c*_b
if (queue[j]>queue[k]) W#45a.v
break; 6`"ZsO
SortUtil.swap(queue,j,k); f8!l7{2%q
k = j; d8.ajeN]o
} p}8ratmN
} WTu{,Q
v>^jy8$
} |+/$ g.
)_O.{$ to
} Y\u_+CG*
/.-m}0h|W-
SortUtil： aL$j/SC
`GkRmv*
package org.rut.util.algorithm; 6bJ"$o
O<a3DyUa;
import org.rut.util.algorithm.support.BubbleSort; U]j&cFbn5_
import org.rut.util.algorithm.support.HeapSort; R1 qMg+
import org.rut.util.algorithm.support.ImprovedMergeSort; AJWLEc4XK
import org.rut.util.algorithm.support.ImprovedQuickSort; Vw?P.4
import org.rut.util.algorithm.support.InsertSort; Ty}R^cy{d
import org.rut.util.algorithm.support.MergeSort; bBFwx@
import org.rut.util.algorithm.support.QuickSort; ;8EjjF [>
import org.rut.util.algorithm.support.SelectionSort; Fc{((x s
import org.rut.util.algorithm.support.ShellSort; auA.6DQ
s7Qyfe&>
/** 0nT%Slbih
* @author treeroot ct.Bg)E
* @since 2006-2-2 b.(XS?4o
* @version 1.0 T]X{@_
*/ f<=^ 4a
public class SortUtil { sKCGuw(mh
public final static int INSERT = 1; $Q,n+ /
public final static int BUBBLE = 2; n%U9iwJ.
public final static int SELECTION = 3; UNY@w=]<
public final static int SHELL = 4; k7b(QADqUU
public final static int QUICK = 5; *p"O*zj
public final static int IMPROVED_QUICK = 6; _6J<YQK
public final static int MERGE = 7; 9H8=eJd
public final static int IMPROVED_MERGE = 8; DoTs9w|5
public final static int HEAP = 9; (>r|j4$
bN4d:0Y
public static void sort(int[] data) { T/5nu?v
sort(data, IMPROVED_QUICK); *<CxFy;|
} Obg@YIwn
private static String[] name={ %g5jY%dg.r
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @6[x%j/!bt
}; l^BEFk;
?PYNE
private static Sort[] impl=new Sort[]{ V!}L<cN
new InsertSort(), yx 7loy$[
new BubbleSort(), ;HT0w_,
new SelectionSort(), F94V5_[
new ShellSort(), L<"k7)k
new QuickSort(), Cea"qNq=k
new ImprovedQuickSort(), |H<|{{E
new MergeSort(), *\C}Ok=
new ImprovedMergeSort(), 0 c,bet{m
new HeapSort() dgm+U%E
}; &F86SrsI
*+&z|Pwv[^
public static String toString(int algorithm){ hxP6C6S
return name[algorithm-1]; w4`!Te
} zAu}hVcW
Ckw83X
public static void sort(int[] data, int algorithm) { S{Rh'x\B
impl[algorithm-1].sort(data); H.)fOctbO
} IS .g);Gj
t0+t9w/fTP
public static interface Sort { @],Z 2
public void sort(int[] data); `2sdZ/fO
} }3Df]
jf2y0W>6s
public static void swap(int[] data, int i, int j) { 8R BDJ
int temp = data; enWF7`
data = data[j]; yi&?d&rK
data[j] = temp; mMga"I9
} MyK^i2eD
} -Zttj/K