[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; t"&qaG{
} ~8lB#NuN
int i1=l; L5]uT`Twa
int i2=mid+1; qI2&a$Zb$
for(int cur=l;cur<=r;cur++){ WG5)-;>q|
if(i1==mid+1) .DhB4v&
data[cur]=temp[i2++]; Xc G
else if(i2>r) R)]+>M-.
data[cur]=temp[i1++]; e1R<+`]
else if(temp[i1] data[cur]=temp[i1++]; }FkF1?C
else :-T[)Q+-3
data[cur]=temp[i2++]; VzuU0
} nS^,Sq\Ak
} QM=Y}
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} A+"'8%o9}
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改进后的归并排序: *HQ>tvUh
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package org.rut.util.algorithm.support; "Q1oSpF
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import org.rut.util.algorithm.SortUtil; zm=|#f
9f3rMPVh(
/** +!-U+W
* @author treeroot !<5Wi)*
* @since 2006-2-2 4 :M}Vz-
* @version 1.0 TmLfH d
*/ 1Zgv+.
public class ImprovedMergeSort implements SortUtil.Sort { %Lfy!]Ru
34aSRFsk*
private static final int THRESHOLD = 10; j=PM]
<*HsJwr)u
/* Rs "#gT
* (non-Javadoc) \{}5VVw-S?
* r]bG,?|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7n'Ww=ttI
*/ %u*HNo
public void sort(int[] data) { G~zP&9N|
int[] temp=new int[data.length]; "lBYn2W
mergeSort(data,temp,0,data.length-1); UH7FIM7kX
} |h2=9\:]
nm@.] "/
private void mergeSort(int[] data, int[] temp, int l, int r) { j k/-7/r
int i, j, k; 249DAjn+
int mid = (l + r) / 2; P,K^oz}
if (l == r) EnYEAjX
return; ^-qz!ib
if ((mid - l) >= THRESHOLD) ^J&}C
mergeSort(data, temp, l, mid); &MJ`rj[%
else cIXqnb
insertSort(data, l, mid - l + 1); cwI3ANV
if ((r - mid) > THRESHOLD) |DXi~
mergeSort(data, temp, mid + 1, r); )3)fq:[
else 9_J'P2e
insertSort(data, mid + 1, r - mid); d@+u&xrd
X->` ~-aj
for (i = l; i <= mid; i++) { dwUs[v
temp = data; .|2[!7CXH
} n@//d.T
for (j = 1; j <= r - mid; j++) { O|0,= 5
temp[r - j + 1] = data[j + mid]; c#8@>;
} fvZ[eJ
int a = temp[l]; jFwJ1W;?-
int b = temp[r]; lQ?_1H~4=
for (i = l, j = r, k = l; k <= r; k++) { \S)cVp)h
if (a < b) { _?;74VWA
data[k] = temp[i++]; fI-f Gx
a = temp; Eyg F,>.4
} else { v=?/c-J*
data[k] = temp[j--]; 7y=1\KW(
b = temp[j]; CjmF2[|
} :2AlvjvjZ
} Qsr+f~"W
} (bGk=q=M
#c`/ f6z
/** L?b;TjLe
* @param data x{,W<oXg
* @param l hU5_ dV
* @param i *\$ko)x?c
*/ l+<AM%U\ V
private void insertSort(int[] data, int start, int len) { >ToI$~84
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Lv:;}
} a]0hB:
} {R5_=MG
} NsL!AAN[V
} dp*E#XCr1
6MelN^\[7
堆排序： Q`z2SYz>
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package org.rut.util.algorithm.support; F&D,y-CQ
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import org.rut.util.algorithm.SortUtil; 5ih5=qX
$!\Z_:
/** }}4uLGu)
* @author treeroot q 7hoI]
* @since 2006-2-2 uUh6/=y
* @version 1.0 MUMB\K*$
*/ F2dwT
public class HeapSort implements SortUtil.Sort{ !>6`+$=U
\r-v]]_<d
/* (non-Javadoc) :<,tGYg/!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H.)J?3
*/ G PL^!_
public void sort(int[] data) { G(#EW+
MaxHeap h=new MaxHeap(); !r9~K^EI
h.init(data); 3tCT"UvTD
for(int i=0;i h.remove(); v'SqH,=d
System.arraycopy(h.queue,1,data,0,data.length); Cuo"6, M
} -5,+gakSk
sJm v{wM
private static class MaxHeap{ 6Bn}W ?
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void init(int[] data){ )C$1))
this.queue=new int[data.length+1]; MO *7:hI
for(int i=0;i queue[++size]=data; NX?6 (lO,
fixUp(size); dXDuO
} Q VWVZ >l
} -z>m]YDH
SHqz&2u
private int size=0; N`7+]T
/n3SE0Y
private int[] queue; P7;q^jlB
"QM2YJ55m`
public int get() { )H%RwV#
return queue[1]; #kAk d-QY6
} JgcMk]|'
c)SQ@B@q
public void remove() { Q,R|VI6Co
SortUtil.swap(queue,1,size--); M&0U@ r-
fixDown(1); [m9=e-KS$Q
} 4&H&zST//m
file://fixdown NP$ D9#
private void fixDown(int k) { $%5vJiuk
int j; G:Nwi=vN
while ((j = k << 1) <= size) { ._`?ZJ
if (j < size %26amp;%26amp; queue[j] j++; ]v0=jm5A
if (queue[k]>queue[j]) file://不用交换 3OJGBiDAr
break; 1b8}TG2
SortUtil.swap(queue,j,k); 10m`LG
k = j; &[$t%:`
} dSbz$Fct
} sUpSXG-W/@
private void fixUp(int k) { 6x@4gPy[
while (k > 1) { ~oeX0l>F
int j = k >> 1; jgT *=/GH2
if (queue[j]>queue[k]) K#]FUUnj=
break; Wfh+D[^
SortUtil.swap(queue,j,k); mxTuwx
k = j; 6#kK
} K]ds2Kp&
} Sh7ob2
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} /.:&9 c
k~qZ^9QB~
} q(}#{OO
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SortUtil： ?1Uq ud
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package org.rut.util.algorithm; r\m2Oo)]
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import org.rut.util.algorithm.support.BubbleSort; 8lF:70wia
import org.rut.util.algorithm.support.HeapSort; &e5,\TQ
import org.rut.util.algorithm.support.ImprovedMergeSort; P(i E"KH;
import org.rut.util.algorithm.support.ImprovedQuickSort; (+;%zh-
import org.rut.util.algorithm.support.InsertSort; Lg+cHaA
import org.rut.util.algorithm.support.MergeSort; >!#or- C
import org.rut.util.algorithm.support.QuickSort; Ej'N!d.
import org.rut.util.algorithm.support.SelectionSort; ]wV_xZ)l^A
import org.rut.util.algorithm.support.ShellSort; pY(S]i
9HD5A$
/** #;<dtw
* @author treeroot S5wkBdr{
* @since 2006-2-2 42wZy|oqp
* @version 1.0 H2E'i\
*/ -<^3!C >
public class SortUtil { kl#)0yqN0
public final static int INSERT = 1; oNRp
public final static int BUBBLE = 2; &p.7SPQ8/
public final static int SELECTION = 3; )Z63 cr/
public final static int SHELL = 4; els71t -
public final static int QUICK = 5; DcEGIaW
public final static int IMPROVED_QUICK = 6; _cQhT
public final static int MERGE = 7; BXLw
public final static int IMPROVED_MERGE = 8; kj'
public final static int HEAP = 9; iayxN5,
}K9Ji]tOK:
public static void sort(int[] data) { 7OLchf
sort(data, IMPROVED_QUICK); 8V+
} ;f2<vp;U
private static String[] name={ CV*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2yndna-
}; e)]DFP[n
/UiB1-*b
private static Sort[] impl=new Sort[]{ iI!g1
new InsertSort(), YG>6;g)Zm
new BubbleSort(), 0<]]q[pr
new SelectionSort(), -d6PXf5
new ShellSort(), #\MkbZc d
new QuickSort(), IdciGS6t
new ImprovedQuickSort(), >~@ABLp6
new MergeSort(), +<f!#4T
new ImprovedMergeSort(), avxI%%|
new HeapSort() QykHB k
}; pcPRkYT[M
Is}?:ET
public static String toString(int algorithm){ RH&}'4JE:
return name[algorithm-1]; BmCBC,j<v>
} qim|=
"oT]_WHqo
public static void sort(int[] data, int algorithm) { lsB.>NlU
impl[algorithm-1].sort(data); PF:E{_~
} :6}cczQE|O
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public static interface Sort { kk+:y{0V
public void sort(int[] data); "Kf4v|6;
} Q&?B^[N*Q
GlaZZ,
public static void swap(int[] data, int i, int j) { #oEq)Vq>g|
int temp = data; ()yOK$"
data = data[j]; <"x *ZT
data[j] = temp; Owm2/
} +c\uBrlZQ;
} jx8hh}C