[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; w.\&9]P3~
} ~,i-8jl,
int i1=l; lLF-{
int i2=mid+1; (aH'h1,G
for(int cur=l;cur<=r;cur++){ 9R7A8
if(i1==mid+1) "$2y-|
data[cur]=temp[i2++]; n:{qC{D-qS
else if(i2>r) 'coV^~qy
data[cur]=temp[i1++]; ;,?KI$K
else if(temp[i1] data[cur]=temp[i1++]; t},/}b
else %>g3~yl
data[cur]=temp[i2++]; `#;e)1
} 2(#7[mgPI
} .~l=zu
34Kw!
} BZ?.D_bu
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改进后的归并排序: ' <@3i[M
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package org.rut.util.algorithm.support; Z|lqb=
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import org.rut.util.algorithm.SortUtil; f)^_|8
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/** Ljp%CI[i
* @author treeroot K|:@Z
* @since 2006-2-2 w%JTTru
* @version 1.0 e,Uo#T6J
*/ =5(>q5Z*
public class ImprovedMergeSort implements SortUtil.Sort { $w);5o
yFtd=AI'E
private static final int THRESHOLD = 10; %nV]ibp2)
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/* Q+W1lv8R
* (non-Javadoc) LC'{p
* q)^Jj?W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A m>cd;
*/ Fd[zDz
public void sort(int[] data) { 4}eepJOn
int[] temp=new int[data.length]; qa0 yg8,<
mergeSort(data,temp,0,data.length-1); $>u*}X9
} Yd#/1!A7u
fR*q?,
private void mergeSort(int[] data, int[] temp, int l, int r) { &i$ldR
int i, j, k; ".<DAs j
int mid = (l + r) / 2; aPm`^ q
if (l == r) ,v';>.]
return; $**r(HV
if ((mid - l) >= THRESHOLD) Ljx(\Cm
mergeSort(data, temp, l, mid); d ysC4DS
else 'U\<IL#U
insertSort(data, l, mid - l + 1); X ><?F|#7T
if ((r - mid) > THRESHOLD) HLV2~5Txc
mergeSort(data, temp, mid + 1, r); !3*(N8_|#
else [&#/]Ul'
insertSort(data, mid + 1, r - mid); 3< 2}V
P dhEQ}H
for (i = l; i <= mid; i++) { n8".XS
temp = data; BA%pY|"Q
} '<ZlGFt'n
for (j = 1; j <= r - mid; j++) { 'gPzm|f|t@
temp[r - j + 1] = data[j + mid]; iX2]VRNxl
} 5yzv|mrx
int a = temp[l]; gT#&"aP5S
int b = temp[r]; \ytJ=0r
for (i = l, j = r, k = l; k <= r; k++) { S&b*rA02zp
if (a < b) { =Q+= f
data[k] = temp[i++]; (}EB2V9Hh
a = temp; k=4N.*#`y
} else { o .qf _A
data[k] = temp[j--]; O4^8jK}
b = temp[j]; {:]9Q Tq
} e=.njMqW5
} Od5JG .]
} }L#_\
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/** CB/D4j;
* @param data 9Bw|(J
* @param l 5 ({t4dm
* @param i .MJofE;Jn
*/ ^wc"&;=c|
private void insertSort(int[] data, int start, int len) { EuyXgK>g
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); OG~6L4"
} <F`>,Pm
} G}:lzOlMH
} m6[0Kws&
} Od%"B\
7,lq}a8z
堆排序： #7q7PYG4
j+["JXy
package org.rut.util.algorithm.support; @++.FEf
}A7j/uy}s
import org.rut.util.algorithm.SortUtil; iTAx=SG
sSi6wO$
/** Ft;^g3N
* @author treeroot f'VX Y-
* @since 2006-2-2 ~nG(5:A5g/
* @version 1.0 +E.GLn2/
*/ <oX7P69
public class HeapSort implements SortUtil.Sort{ !WpBfd>v.I
h >s!K9
/* (non-Javadoc) }Hxd*S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4bn(zyP
*/ HY%i`]4X
public void sort(int[] data) { % <qw
MaxHeap h=new MaxHeap(); Y#lk6
h.init(data); 7U2J xE
for(int i=0;i h.remove(); Ooq! 0g
System.arraycopy(h.queue,1,data,0,data.length); Bb}fj28
} A3iFI9Iv
}`,t$NV`
private static class MaxHeap{ h?;T7|^
dK2p7xo
void init(int[] data){ 4*cU<
this.queue=new int[data.length+1]; #[`:'e
for(int i=0;i queue[++size]=data; vWf; 'j
fixUp(size); li 6%)
} @qnD=mE
} 6w(6}m.L^
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private int size=0; x*nSHb
!qN||mCH
private int[] queue; "G@g" gP
OSf}Q=BL
public int get() { *Ie7{EhJ'
return queue[1]; $+3}po\
} X7i/fm{l'
kT!9`S\
public void remove() { /O^RF}
SortUtil.swap(queue,1,size--); 7El[ >
fixDown(1); t[oT-r
} .On|uC)!
file://fixdown 5_z33,q2
private void fixDown(int k) { OPx`u
int j; 2U:H545]]
while ((j = k << 1) <= size) { p-/|mL
if (j < size %26amp;%26amp; queue[j] j++; (3#Cl 1]f
if (queue[k]>queue[j]) file://不用交换 4W)B'+ZK8
break; K?zH35f$
SortUtil.swap(queue,j,k); )l[M Q4vWW
k = j; ;Mpy#yIU.
} $W9{P;
} j"|=C$Kn/
private void fixUp(int k) { !/3B3cG
while (k > 1) { !cAyTl(_
int j = k >> 1; \&iP`v`K
if (queue[j]>queue[k]) D0#x Lh
break; !H irhDN
SortUtil.swap(queue,j,k); 0 rXxRQ
k = j; }c}| $h^Y
} [h34d5'w
} d~:!#uWyFk
QZ:8+[oy
} PV/77{'
\a6^LD}B
} 'b#0t#|TM
I9mvte
SortUtil： EVVP]ND
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package org.rut.util.algorithm; },>pDeX^P
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import org.rut.util.algorithm.support.BubbleSort; qLT>Mz)$%
import org.rut.util.algorithm.support.HeapSort; 3`ELKq
import org.rut.util.algorithm.support.ImprovedMergeSort; `^FGwx@
import org.rut.util.algorithm.support.ImprovedQuickSort; bV$)!]V
import org.rut.util.algorithm.support.InsertSort; G1"zElug
import org.rut.util.algorithm.support.MergeSort; 0DmMG
import org.rut.util.algorithm.support.QuickSort; OVko+X`
import org.rut.util.algorithm.support.SelectionSort; 8rMX9qTO@
import org.rut.util.algorithm.support.ShellSort; I>[RqG
!2'jrJGc
/** -sjd&)~S[
* @author treeroot pm\x~3jHs
* @since 2006-2-2 \CXQo4P
* @version 1.0 :I:!BXQT$
*/ 4x;/HEb7?
public class SortUtil { bLQ ^fH4ww
public final static int INSERT = 1; `>?ra-
public final static int BUBBLE = 2; { Q`QX`#
public final static int SELECTION = 3; f3Hed
public final static int SHELL = 4; Ju3*lk/j-
public final static int QUICK = 5; 1QU:?_\6@t
public final static int IMPROVED_QUICK = 6; c=L2%XPP
public final static int MERGE = 7; Jnna$6G)B
public final static int IMPROVED_MERGE = 8; L\&<sy"H
public final static int HEAP = 9; MwR0@S}*
?I[8'
public static void sort(int[] data) { .Y3pS/VI
sort(data, IMPROVED_QUICK); ywb4LKD
} ae*Mf7
private static String[] name={ z[cyA.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" f~dd3m('
}; rSHpS`\ou
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private static Sort[] impl=new Sort[]{ |d*&y#kV
new InsertSort(), ewfP G,S
new BubbleSort(), PB/IFsJ
new SelectionSort(), Qum9A
new ShellSort(), :L1dyVA{
new QuickSort(), Q`rF&)Q5
new ImprovedQuickSort(), VGceD$<
new MergeSort(), |ZCn`9hvn
new ImprovedMergeSort(), ltgc:&=|@
new HeapSort() *r=:y{!Yd
}; Gu'rUo3Do
Pj4/xX
public static String toString(int algorithm){ YQpSlCCo 3
return name[algorithm-1]; h~p>re
} o4%y>d)
g"?Y+j
public static void sort(int[] data, int algorithm) { 59%tXiO
impl[algorithm-1].sort(data); +> WM[o^I
} AwTJJ0>
\uXcLhXN
public static interface Sort { Z7_ zMM
public void sort(int[] data); )E,\H@A
} y-j\zK
1xbK'i:-S
public static void swap(int[] data, int i, int j) { 8:#rA*Y
int temp = data; Pp|*J^U 4
data = data[j]; ;Wl+zw
data[j] = temp; *_KFW@bC:
} ,Vh{gm1
} ^ mS o1?<