[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; I 8 Ls_$[
} e!P]$em|1E
int i1=l; ni-4~k
int i2=mid+1; VL2ACv(
for(int cur=l;cur<=r;cur++){ $O,IXA
if(i1==mid+1) S<>u
data[cur]=temp[i2++]; tx]!|x" F
else if(i2>r) 4_w{~
data[cur]=temp[i1++]; Eg0qY\'
else if(temp[i1] data[cur]=temp[i1++]; =z9FjK
else Z(hRwIOF
data[cur]=temp[i2++]; ?}<Wmy2A
} 2fG[q3`
} )P9&I.a8
E[tEW0ub
} 9On(b|mT
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改进后的归并排序: J#Agk^Y 5
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package org.rut.util.algorithm.support; A~#w gLGn
y])z,#%ED
import org.rut.util.algorithm.SortUtil; kRB2J3Nt.
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/** xB,(!0{`
* @author treeroot nj7\vIR7
* @since 2006-2-2 zwdi$rM5
* @version 1.0 U&L?IT=x
*/ yA^+<uz}
public class ImprovedMergeSort implements SortUtil.Sort { JV;-P=o1B
;(;{~1~
private static final int THRESHOLD = 10; ){"-J&@?
FoGSCg%
/* AHdh]pfH
* (non-Javadoc) SAN/fnM
* v9l|MI15V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )U:W 9%
*/ xkmqf7w
public void sort(int[] data) { Uf<IXx&;
int[] temp=new int[data.length]; ( 2i{8
mergeSort(data,temp,0,data.length-1); 0uS6F8x@
} }yMAs
ZR@PqS+O/
private void mergeSort(int[] data, int[] temp, int l, int r) { Un{9reX5
int i, j, k; k{.`=j
int mid = (l + r) / 2; o;7_*=i
if (l == r) U$AV"F&!&}
return; *)um^O
if ((mid - l) >= THRESHOLD) c~{)vL0K
mergeSort(data, temp, l, mid); P> ilRb
else p^?]xD(
insertSort(data, l, mid - l + 1); *N3X"2X:
if ((r - mid) > THRESHOLD) ^RE("'+
mergeSort(data, temp, mid + 1, r); 4%,E;fB?=
else GB` G(a
insertSort(data, mid + 1, r - mid); 0j(/N
z*OQ4_
for (i = l; i <= mid; i++) { qn#f:xltu
temp = data; v="2p8@F
} Yb Dz{m
for (j = 1; j <= r - mid; j++) { 2^T`> ?{X
temp[r - j + 1] = data[j + mid]; LM?UV)
} EmubpUS;
int a = temp[l]; ylBjuD+
int b = temp[r]; @/0-`Y@?
for (i = l, j = r, k = l; k <= r; k++) { Q:sw*7"F
if (a < b) { V~_aM@q1
data[k] = temp[i++]; [{cMEV&
a = temp; ucgp=bye
} else { g=_@j`
data[k] = temp[j--]; !(-S?*64l
b = temp[j]; 0ntf%#2{
} D}6~2j
} B kWoK/f4
} ,]qTJ`J
)H`1CcT
/** kPg| o3H
* @param data sQ>L3F;A`
* @param l Zh,{e/j
* @param i FT+[[9i
*/ QeZK&^W
private void insertSort(int[] data, int start, int len) { (2fWJ%7VG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FCMV1,
} 13KfI
} Aq:1
} ^YwTO/Q|
} Zcg@]Sx(I
)Me$BK>
堆排序： ^-GzWT
u AmDXqJ3
package org.rut.util.algorithm.support; qKL mL2O
Y}Gf%Xi,
import org.rut.util.algorithm.SortUtil; '#p2v'A
RNB ha&
/** oUG!=.1}K5
* @author treeroot oz[: T3oE>
* @since 2006-2-2 qH1&tW$
* @version 1.0 B6gn(w3
*/ F2#s^4Ii
public class HeapSort implements SortUtil.Sort{ sp'f>F2]
c^s%t:)K
/* (non-Javadoc) -AcVVK&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bw& U[|A0%
*/ MX\v2["FoV
public void sort(int[] data) { "Gh5 ^$w?j
MaxHeap h=new MaxHeap(); c.;}e:)s
h.init(data); :$J4T;/{
for(int i=0;i h.remove(); >wOqV!0<
System.arraycopy(h.queue,1,data,0,data.length); OELh6R
} o+j~~P
9yt)9f
private static class MaxHeap{ /3pvq%i
AYnk.H-v
void init(int[] data){ \sZT[42
this.queue=new int[data.length+1]; ?1kXV n$
for(int i=0;i queue[++size]=data; *[SOz)
fixUp(size); z;#]xCV
} ?@uyqi~:U
} GjD^\d/
B{ptP4As-
private int size=0; Dq:>]4%
2LqJ.HH
private int[] queue; =Mby;wQ?|
7I0[Ii
public int get() { (m3 <)
return queue[1]; ZP}NFh%,u
} C@#KZ`c)
-m"9v%>Y
public void remove() { e[ 9
SortUtil.swap(queue,1,size--); ;[,r./XmH
fixDown(1); LI`H,2Km
} h.%)RW?
file://fixdown V9dJNt'Ui
private void fixDown(int k) { @3_[NI%
int j; )] C"r_
while ((j = k << 1) <= size) { ~p* \|YC
if (j < size %26amp;%26amp; queue[j] j++; Q`{2yU:r
if (queue[k]>queue[j]) file://不用交换 5tG\5
break; [d^ [Y:I'\
SortUtil.swap(queue,j,k); ]?3-;D.eG
k = j; 2C59fXfd
} }3DZ`8u
} OoqA`%
private void fixUp(int k) { 4/J"}S
while (k > 1) { (l]_0-Z
int j = k >> 1; Ak'=/`+p
if (queue[j]>queue[k]) L7rH=gZ&!]
break; E-?@9!2 &
SortUtil.swap(queue,j,k); QGoBugU
k = j; OB5t+_s
} 6 #m:=
} 4u}jkd$]*
p1`")$
} sb"h:i>O4
7~ =r9-&G
} p/WE[8U
}*>xSb1
SortUtil： f~-qjEWm
2[QyH'"^E
package org.rut.util.algorithm; 4ynGXJmMlR
fB"It~ p
import org.rut.util.algorithm.support.BubbleSort; dm`:']?
import org.rut.util.algorithm.support.HeapSort; f C_H0h3
import org.rut.util.algorithm.support.ImprovedMergeSort; t}x^*I$*
import org.rut.util.algorithm.support.ImprovedQuickSort; vL ]z3
import org.rut.util.algorithm.support.InsertSort; Cak-J~=
import org.rut.util.algorithm.support.MergeSort; 2}xvM"k=k
import org.rut.util.algorithm.support.QuickSort; $dkkgsw7
import org.rut.util.algorithm.support.SelectionSort; Cj1nll8c
import org.rut.util.algorithm.support.ShellSort; 0Ma3
2'T uS?
/** &T&>4I!'M
* @author treeroot \VAm4
* @since 2006-2-2 w3E#v&"=Y
* @version 1.0 _<m yM2z
*/ B82SAV/O
public class SortUtil { ]3&BLq
public final static int INSERT = 1; W~Ae&gcn#
public final static int BUBBLE = 2; a=&{B'^G
public final static int SELECTION = 3; )7;E,m<:tO
public final static int SHELL = 4; (>M? iB
public final static int QUICK = 5; $-p#4^dg
public final static int IMPROVED_QUICK = 6; :/~TV
public final static int MERGE = 7; 6H'W]T&
public final static int IMPROVED_MERGE = 8; uB>OS1=
public final static int HEAP = 9; 3\E G
.g8db d
public static void sort(int[] data) { l0nm>ps'D
sort(data, IMPROVED_QUICK); D5$|vv1
} E9~}%&
private static String[] name={ PCs`aVZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l,@rB+u
}; #Zj3SfU~`
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private static Sort[] impl=new Sort[]{ {2=f,,|+f
new InsertSort(), i&Xjbcbp
new BubbleSort(), t~kh?u].j
new SelectionSort(), 'H8;(Rw
new ShellSort(), u)9YRMl
new QuickSort(), 716r/@y$6
new ImprovedQuickSort(), /M5R<rl
new MergeSort(), eYD-8*
new ImprovedMergeSort(), 6O| rI>D
new HeapSort() CA]u3bf~
}; 2kW*Z7@D
A| s\5"??
public static String toString(int algorithm){ ;nbbKQ]u
return name[algorithm-1]; 4"d'iY
} A40Q~X
i(an]%'v
public static void sort(int[] data, int algorithm) { 3fd?xhWbN
impl[algorithm-1].sort(data); 7;3;8Q FX
} $9rQ w1#e
D]NJ^.X
public static interface Sort { k4+Q$3"
public void sort(int[] data); Ux+UcBKm-
} 9`T2
qLa6c2o,
public static void swap(int[] data, int i, int j) { yP0XA=,Y
int temp = data; v]c+|nRs
data = data[j]; I08W I u
data[j] = temp; u`Abko<D
} ':#DROe!
} :)DvZxHE@