[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; Ac@VGT:9
} _)8s'MjA:&
int i1=l; jp,4h4C^)
int i2=mid+1; K0~rN.C!0
for(int cur=l;cur<=r;cur++){ ?4,T}@P
if(i1==mid+1) 1?}T=)3+$
data[cur]=temp[i2++]; A^g(k5M*
else if(i2>r) dN q$}
data[cur]=temp[i1++]; &~CI<\o P
else if(temp[i1] data[cur]=temp[i1++]; ];m_4
else h`q1
data[cur]=temp[i2++]; s;e\ pt
} 3`g^
} 1Mzmg[L8
[JiH\+XLPs
} f|5co>Hk
6Mf0`K
改进后的归并排序: ?9/G[[(
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package org.rut.util.algorithm.support; .*oU]N%K=
i5Ggf"![
import org.rut.util.algorithm.SortUtil; e ,(mR+a8
**%37
/** =cI(d ,
* @author treeroot P pb\6|*
* @since 2006-2-2 fhiM U8(&
* @version 1.0 V gWRW7Se
*/ Ml_^ `vn
public class ImprovedMergeSort implements SortUtil.Sort { 79gT+~z
N8jIMb'<
private static final int THRESHOLD = 10; Cdn J&N{
TjH][bH5
/* Y2AJ+ |
* (non-Javadoc) [n@] r2g)3
* x5Bk/e'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SUiOJ[5,
*/ >:-$+I
public void sort(int[] data) { 6P3*Z
int[] temp=new int[data.length]; oJ^P(]dw
mergeSort(data,temp,0,data.length-1); X?O[r3<
} K;?+8(H
H_a[)DT
private void mergeSort(int[] data, int[] temp, int l, int r) { 1EK*g;H
int i, j, k; ytImB`'\
int mid = (l + r) / 2; 5m@V#2^P
if (l == r) j2k"cmsKh
return; )lkjqFQ(
if ((mid - l) >= THRESHOLD) M`_0C38
mergeSort(data, temp, l, mid); @ArSC
else Jy)/%p~
insertSort(data, l, mid - l + 1); O.? JmE
if ((r - mid) > THRESHOLD) rI\FI0zIp_
mergeSort(data, temp, mid + 1, r); {}9a6.V;}
else 3";q[&F9y
insertSort(data, mid + 1, r - mid); MgZ/(X E
4#D,?eA7
for (i = l; i <= mid; i++) { dtDFoETz
temp = data; /ZX}Nc g
} '1[Ft03
for (j = 1; j <= r - mid; j++) { \bXa&Lq
temp[r - j + 1] = data[j + mid]; =;L|gtH"
} 4W75T2q#
int a = temp[l]; \z$= K
int b = temp[r]; j 7B!h|
for (i = l, j = r, k = l; k <= r; k++) { )%TmAaj9d
if (a < b) { F,kZU$
data[k] = temp[i++]; F59 TZI
a = temp; &=[WIG+rk
} else { Qs!5<)6
data[k] = temp[j--]; w0. u\
b = temp[j]; +{]j]OP
} WJi]t93
} ]Ljf?tk
} %d@z39-;
[),ige
/** C!gZN9-
* @param data F|8&
* @param l Py<}S-:
* @param i gGYKEq{j(
*/ +`4A$#$+y
private void insertSort(int[] data, int start, int len) { T{"(\X$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6]N.%Y[(
} kZ~~/?B
} 9r9NxKuAO
} Z+SRXKQ
} \U0Q<ot/7
S:}7q2:
堆排序： +T ?NH9
}V>T M{
package org.rut.util.algorithm.support; Om&Dw|xG8
~DWl s.
import org.rut.util.algorithm.SortUtil; MV"=19]
#yen8SskB
/** 4-w{BZuS
* @author treeroot ZCw]m#lS
* @since 2006-2-2 e20-h3h+
* @version 1.0 $G>.\t
*/ ]:;&1h3'7
public class HeapSort implements SortUtil.Sort{ iU-j"&L5
'w/hw'F6
/* (non-Javadoc) ]9-\~Mwh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2oW"'43X
*/ XW9!p.*.U
public void sort(int[] data) { ,4rPg]r@
MaxHeap h=new MaxHeap(); }Jw,>}
h.init(data); ]n~V!hl?A
for(int i=0;i h.remove(); a*;b^Ze`v
System.arraycopy(h.queue,1,data,0,data.length); ?2a$*(
} /reX{Y
u2I Cl
private static class MaxHeap{ @HW*09TG
Efe 7gE'
void init(int[] data){ & kIFcd@
this.queue=new int[data.length+1]; iLT}oKF2N;
for(int i=0;i queue[++size]=data; 9mgIUjz
fixUp(size); ^Cmyx3O^
} $>gFf}#C
} H]s.=.Ki
6@o*xK7L
private int size=0; POW>~Tof1
QJNFA}*>
private int[] queue; mOSv9w#,
4Hg9N}
public int get() { kza5ab
return queue[1]; `/g UV
} VQI3G
NI5``BwpO
public void remove() { zi:BF60]=
SortUtil.swap(queue,1,size--); <#.g=ay
fixDown(1); YqG7h,F
} 5xde;
file://fixdown Ymgw-NJ;(
private void fixDown(int k) { wzaV;ac4K
int j; ,Q,^3*HX9}
while ((j = k << 1) <= size) { Q?T]MUY(L
if (j < size %26amp;%26amp; queue[j] j++; hph4`{T
if (queue[k]>queue[j]) file://不用交换 h![#;>(
break; f?b"iA(6
SortUtil.swap(queue,j,k); P2!C|SLK
k = j; CARzO7b\w
} *=n:-
} l~.-e^p?
private void fixUp(int k) { JRFtsio*
while (k > 1) { +V+a4lU14
int j = k >> 1; /=h` L,
if (queue[j]>queue[k]) p'fYULYE
break; {$r[5%L\H
SortUtil.swap(queue,j,k); 5IN(|B0
k = j; F?cK-.
} }Lv;!
} 2tLJU Z1
eQ"E
} hcc/=_hA
N7_"H>O$0U
} S$3JMFA
:KN-F86i
SortUtil： 7.T?#;'3
C?Ucu]cW
package org.rut.util.algorithm; :LTN!jj
nm+s{
import org.rut.util.algorithm.support.BubbleSort; -hV*EPQ/
import org.rut.util.algorithm.support.HeapSort; ]?)TdJ`
import org.rut.util.algorithm.support.ImprovedMergeSort; Ah<+y\C
import org.rut.util.algorithm.support.ImprovedQuickSort; $"&JWT!#
import org.rut.util.algorithm.support.InsertSort; {)"vN(mX
import org.rut.util.algorithm.support.MergeSort; xpI wrJO
import org.rut.util.algorithm.support.QuickSort; P$sxr
import org.rut.util.algorithm.support.SelectionSort; AEuG v}#
import org.rut.util.algorithm.support.ShellSort; Y~Ifj,\
IAEAhqp
/** Ug`djIL
* @author treeroot ^&)|sP
* @since 2006-2-2 b2]Kx&!
* @version 1.0 bfO=;S]b!
*/ `kr?j:g
public class SortUtil { a>)f=uS
public final static int INSERT = 1; w:l"\Tm
public final static int BUBBLE = 2; <or2
public final static int SELECTION = 3; W l16`9
public final static int SHELL = 4; -DCbko
public final static int QUICK = 5; yBRC*0+Vy
public final static int IMPROVED_QUICK = 6; <X5fUU"+U
public final static int MERGE = 7; <1pEwI~
public final static int IMPROVED_MERGE = 8; }i2V.tVB-
public final static int HEAP = 9; E e]-qN*8
B;WCTMy}
public static void sort(int[] data) { d"NLE'R
sort(data, IMPROVED_QUICK); �{x7,
} L]Mo;kT<Q
private static String[] name={ *qMY22X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v}(WaO#S
}; s79r@])=
{PmZ9
private static Sort[] impl=new Sort[]{ aoTP[Bp
new InsertSort(), f-2c0Bi
new BubbleSort(), 1U\z5$V
new SelectionSort(), "mNq&$
new ShellSort(), ^t"'rD-I
new QuickSort(), \Roz$t-R|f
new ImprovedQuickSort(), x`?3C"N:<
new MergeSort(), 4fzZ;2sl}
new ImprovedMergeSort(), FC*[*
new HeapSort() >3_Gw4S*H
}; !by\9 ?n
kW (Bkuc)
public static String toString(int algorithm){ j7c3(*Pl
return name[algorithm-1]; wPl%20t
} pmilrZmm]
\;-|-8Q
public static void sort(int[] data, int algorithm) { 4X$Qu6#i
impl[algorithm-1].sort(data); -^57oU
} qw8Rlws%
bF(f*u
public static interface Sort { 03(4 x'z
public void sort(int[] data); \4#W xZ
} EP+J N
Lp7SLkwh3M
public static void swap(int[] data, int i, int j) { m`_ONm'T&
int temp = data; 4aY|TN/|
data = data[j]; :@)>r9N
data[j] = temp; XrPfotj1
} r9lR|\Ax2U
} A9JdU&