[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; qL 5>o>J
} 4JMiyiW&
int i1=l; gH7z
int i2=mid+1; !I8f#'p
for(int cur=l;cur<=r;cur++){ H3O@9YU
if(i1==mid+1) z2 hFn&
data[cur]=temp[i2++]; %SA!p;
else if(i2>r) O)#U ^
data[cur]=temp[i1++]; yoS? s
else if(temp[i1] data[cur]=temp[i1++]; Tlsa%pn
else wk$,k
data[cur]=temp[i2++]; K+d2m9C=
} ]<trA$ 0
} JUt7En;XE
x` /)g(
} "(TkJbwC[
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改进后的归并排序: M$S]}
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package org.rut.util.algorithm.support; :T@r*7hNT
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import org.rut.util.algorithm.SortUtil; Mr3-q
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/** @,OT/egF4:
* @author treeroot LN^f1/b*
* @since 2006-2-2 1wn&js C
* @version 1.0 [r-}bp'Gp
*/ Q!'qC*Gyfn
public class ImprovedMergeSort implements SortUtil.Sort { !xK=#pa
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private static final int THRESHOLD = 10; 0^l%j8/
77,oPLSn
/* 0kDBE3i#
* (non-Javadoc) wWjG JvJ
* #1/}3+=5B
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H3KTir"on
*/ "v]%3i.* -
public void sort(int[] data) { h5~n 1qX
int[] temp=new int[data.length]; vNDu9ovs-
mergeSort(data,temp,0,data.length-1); c$H+g,7xQ-
} Le#spvV3J|
j,-C{ K
private void mergeSort(int[] data, int[] temp, int l, int r) { 3YL l;TP_
int i, j, k; K`6z&*
int mid = (l + r) / 2; AHbZQulC
if (l == r) _eQ-`?
return; Jfhk@27T
if ((mid - l) >= THRESHOLD) `'4)q}bB
mergeSort(data, temp, l, mid); LJTo\^*
else ?vtX"Fdz
insertSort(data, l, mid - l + 1); jgu*Y{ocm
if ((r - mid) > THRESHOLD) v;2CU
mergeSort(data, temp, mid + 1, r); LBlN2)\@
else /bVZ::A&_
insertSort(data, mid + 1, r - mid); >,5i60Q
n! h7
for (i = l; i <= mid; i++) { X@wm1{!
temp = data; +s[\g>i
} /n5n )P@L
for (j = 1; j <= r - mid; j++) { DVp5hR_$
temp[r - j + 1] = data[j + mid]; ]N)DS+V/
} @w9{5D4
int a = temp[l]; \=2m7v#E
int b = temp[r]; onei4c>@
for (i = l, j = r, k = l; k <= r; k++) { 9U_ks[Qa
if (a < b) { G=/k>@Di
data[k] = temp[i++]; </~ 6f(mg
a = temp; OM83S|1s
} else { x~DLW1I
data[k] = temp[j--]; =?Fkn4t
b = temp[j]; `}gbc69
} :7.Me;RA
} S;\R!%t_
} ^krk&rW3
,[rPe\w.z
/** jA(vTR.`
* @param data k3Cz9Vt%
* @param l b~Y%gC)FR
* @param i h1D?=M\9
*/ cu9Qwm
private void insertSort(int[] data, int start, int len) { 7L(eh7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); n> w`26MMp
} &Z("D7.G
} 9.OA, 6
} P }7zE3V
} y0bq;(~X~
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堆排序： " {dek
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package org.rut.util.algorithm.support; 1+kE!2b;b
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import org.rut.util.algorithm.SortUtil; uXZg1F)
&m^@9E)S/
/** (GKpA}~R
* @author treeroot $9!D\N,}]C
* @since 2006-2-2 XFwLz
* @version 1.0 WY
*/ f>9s!Hpu_
public class HeapSort implements SortUtil.Sort{ sp9W?IJ 6c
K|S:{9Q
/* (non-Javadoc) @\P4/+"9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w|Cx>8P8@
*/ <v 0*]NiX
public void sort(int[] data) { `u'bRp
MaxHeap h=new MaxHeap(); =Ufr^naA
h.init(data); C|-pD
for(int i=0;i h.remove(); u eb-2[=
System.arraycopy(h.queue,1,data,0,data.length); .10y0FL4
} L5fuM]G`
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private static class MaxHeap{ n| !@1sd
_Q(g(p&
void init(int[] data){ `RRE(SiKU
this.queue=new int[data.length+1]; E;Y;r"
for(int i=0;i queue[++size]=data; }CGSEr4'w~
fixUp(size); s0u{dqP
} \Gp*x\<^Z
} gN6rp(?y
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private int size=0; <W)u{KS#TY
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private int[] queue; R,2P3lv1v@
W-~n|PX8+
public int get() { 25y6a|`
return queue[1]; rNOES3[~
} `YBkF
#uCB)n&.
public void remove() { ecJ6
SortUtil.swap(queue,1,size--); vdDludEv
fixDown(1); Y5q3T`xE
} ./6<r OW
file://fixdown F/d7q%I
private void fixDown(int k) { u"xJjS
int j; B@YyQ'
while ((j = k << 1) <= size) { _6@hTen`
if (j < size %26amp;%26amp; queue[j] j++; Y/ot3[
if (queue[k]>queue[j]) file://不用交换 UYP9c}_,4
break; UO Ug4
SortUtil.swap(queue,j,k); zvc`3
k = j; Os%n{_#8
} (h-*_a}F4
} D('2p8;2"7
private void fixUp(int k) { /\s}uSW
while (k > 1) { ,|?CU r9Y
int j = k >> 1; oPKr* `'
if (queue[j]>queue[k]) <bck~E
break; tMx}*l|]
SortUtil.swap(queue,j,k); L)QE`24
k = j; #L}+H!Myh
} (6p]ZY
} ?']h%'Q
rZPT89M6
} 7IlOG~DC
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} $h[QQ-
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SortUtil： >kZ57,
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package org.rut.util.algorithm; ,tH5e&=U01
G.'+-v=\]
import org.rut.util.algorithm.support.BubbleSort; IxR?'
import org.rut.util.algorithm.support.HeapSort; hG~reVNf
import org.rut.util.algorithm.support.ImprovedMergeSort; XZNY4/25G
import org.rut.util.algorithm.support.ImprovedQuickSort; 5l-mW0,MK
import org.rut.util.algorithm.support.InsertSort; vP@v.6gS,
import org.rut.util.algorithm.support.MergeSort; ^>y@4qB
import org.rut.util.algorithm.support.QuickSort; }U w&Ny
import org.rut.util.algorithm.support.SelectionSort; SHb(O<6
import org.rut.util.algorithm.support.ShellSort; $2DuB
~9\WFF/
/** ZPN roCK`
* @author treeroot ow=UtA-^O
* @since 2006-2-2 5m:i6,4
* @version 1.0 ]{~NO{0@Y
*/ 8;Fn7k_Uf
public class SortUtil { `cQo0{xK
public final static int INSERT = 1; s#Jh -+lM
public final static int BUBBLE = 2; :4S%'d7
public final static int SELECTION = 3; 7`IpBm<
public final static int SHELL = 4; t&Os;x?To?
public final static int QUICK = 5; \AUI|M;'
public final static int IMPROVED_QUICK = 6; R2L;bGI*J
public final static int MERGE = 7; 2jsw"aHW
public final static int IMPROVED_MERGE = 8; Lj\/Ji_
public final static int HEAP = 9; |sZ!
S_T^G` [
public static void sort(int[] data) { ,B&fFis
sort(data, IMPROVED_QUICK); depYqYK7G
} R:JX<Ba
private static String[] name={ GsbAlNP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" I-]>d;4.
}; "TV(H+1,z
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private static Sort[] impl=new Sort[]{ E Uar/
new InsertSort(), *tOG*hwdT
new BubbleSort(), 7J28JK
new SelectionSort(), C.^Ven
new ShellSort(), "!>DX1rsi
new QuickSort(), j#~Jxv%n
new ImprovedQuickSort(), ``,k5!a66\
new MergeSort(), ^[Ua46/"m
new ImprovedMergeSort(), ._wkj
new HeapSort() b96%")
}; B{oU,3U>
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public static String toString(int algorithm){ TvNY:m6.%
return name[algorithm-1]; MC0TaP
} fl Jp4-nx
cw&Hgjj2
public static void sort(int[] data, int algorithm) { y~ G.V,0
impl[algorithm-1].sort(data); ~'5
} PN~@
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public static interface Sort { 3ZTE<zRQ
public void sort(int[] data); [U#72+K
} -IlJ^Al4
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public static void swap(int[] data, int i, int j) { j` E +qk
int temp = data; Hv]7e|
data = data[j]; [ rNXQ`/
data[j] = temp; Kx"<J@
} NVIK>cT6
} <?D[9Mk$