[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; Z\$HgG
} uL'f8Pqg
int i1=l; f^%3zWp|-
int i2=mid+1; PSrx!
for(int cur=l;cur<=r;cur++){ &\zYbGU
if(i1==mid+1) A`c22Ls]
data[cur]=temp[i2++]; ,"qCz[aDN1
else if(i2>r) "EW8ll7r
data[cur]=temp[i1++]; IQQv+af5
else if(temp[i1] data[cur]=temp[i1++]; [|\6AIoS
else GR,2^]<{
data[cur]=temp[i2++]; [hJ1]RW8
} 6fwNlC/9
} 01bCP
{sTf4S\S
} n}p G&&;q
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改进后的归并排序: <,.$U\W
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package org.rut.util.algorithm.support; b#2)"V(
uLms0r\@!
import org.rut.util.algorithm.SortUtil; zal]t$z>
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/** #-az]s|N
* @author treeroot d[9,J?'OQ
* @since 2006-2-2 s"L&y <?)
* @version 1.0 uH_KOiF
*/ '.}}k!#
public class ImprovedMergeSort implements SortUtil.Sort { mY|c7}>V;
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private static final int THRESHOLD = 10; zI88IM7/
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/* KbJ6U75|f
* (non-Javadoc) Fwm$0=BXL
* z*3b2nV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o'Bd. B
*/ ZvY"yl?e
public void sort(int[] data) { ,%i Scr,z
int[] temp=new int[data.length]; T2{e1 =Z7
mergeSort(data,temp,0,data.length-1); h yrPu_
} 0 _!0\d#c
?pL|eS7
private void mergeSort(int[] data, int[] temp, int l, int r) { tX*@r
int i, j, k; B=Hd:P|
int mid = (l + r) / 2; UlXm4\@
if (l == r) 31n"w;
return; :J;U~emq
if ((mid - l) >= THRESHOLD) ~Nh6po{
mergeSort(data, temp, l, mid); F`}'^>
else )! [B(
insertSort(data, l, mid - l + 1); #83
if ((r - mid) > THRESHOLD) ]+lT*6P*
mergeSort(data, temp, mid + 1, r); (6%T~|a
else 3j#VKj+Uc
insertSort(data, mid + 1, r - mid); H4i}gdR
B'/U#>/
for (i = l; i <= mid; i++) { ]#~J[uk
temp = data; 1eXMMZ/?
} 3=S|U,
for (j = 1; j <= r - mid; j++) { vgW(l2,@
temp[r - j + 1] = data[j + mid]; bLT3:q#s
} z/Lb1ND8
int a = temp[l]; =lNW1J\SW
int b = temp[r]; ]4rmQAS7"
for (i = l, j = r, k = l; k <= r; k++) { Q`CuZkP(
if (a < b) { 3G// _f
data[k] = temp[i++]; mR}8}K]L
a = temp; Rtf<UhUn
} else { u5CSx'h]
data[k] = temp[j--]; I0-1Hr
b = temp[j]; Kq7r+A
} L5hF-Ek! 3
} NF$6yv9C
} %Tp9GGt
#rHMf%0
/** ^Ks1[xc*`
* @param data @`.4"*@M
* @param l 0+&WIs
* @param i &_)P)L
*/ UG vIHm
private void insertSort(int[] data, int start, int len) { R ENCk(
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [gzaOP`f
} bbL\xq^
} =i~ = |K!
} @= <{_p
} l,n_G/\
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堆排序： DLwlA!z
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package org.rut.util.algorithm.support; t%@iF U;}
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import org.rut.util.algorithm.SortUtil; Ust +g4
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/** ;LS.
* @author treeroot -6MPls+
* @since 2006-2-2 -=-^rQx9
* @version 1.0 sBlq)h;G?6
*/ rEr=Mi2
public class HeapSort implements SortUtil.Sort{ % :G78.
Ehy(;n)\
/* (non-Javadoc) jLFaf#G]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;&lXgC^*
*/ (~|)Gmq2
public void sort(int[] data) { lU 9o"2
MaxHeap h=new MaxHeap(); \^1^|a"
h.init(data); c coi
for(int i=0;i h.remove(); ~HY)$Yp;
System.arraycopy(h.queue,1,data,0,data.length); e_-g|ukC
} 51:5rN(_
#jbC@A9Pe
private static class MaxHeap{ l@4pZkdq
e"@r[pq-{u
void init(int[] data){ G-CL \G\n
this.queue=new int[data.length+1]; D(z#)oDr
for(int i=0;i queue[++size]=data; U& GPede
fixUp(size); (~@.9&cBD
} S1k*"><
} Q_T,=y
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private int size=0; %<~EwnoT
[,bJKz)a
private int[] queue; kwi$%
J5b3r1~D"[
public int get() { pyf'_
return queue[1]; mR.j8pi
} =u0=)\0@r
ZW M:Wj192
public void remove() { 5ncW s)
SortUtil.swap(queue,1,size--); ,WdSJ BK'a
fixDown(1); +s}!+I8P
} D[W` q#W
file://fixdown s=$xnc}mf
private void fixDown(int k) { $%U}k=-
int j; hl[<o<`Q
while ((j = k << 1) <= size) { yXkQ ,y
if (j < size %26amp;%26amp; queue[j] j++; l>jrY1u
if (queue[k]>queue[j]) file://不用交换 %n]jsdE^|
break; J^t0M\
SortUtil.swap(queue,j,k); Qfeu3AT
k = j; [,&g46x22
} aT/2rMKPF
} BTsvL>Wy
private void fixUp(int k) { xb7!!PR
while (k > 1) { bLTX_ R
int j = k >> 1; W'Gh:73'}
if (queue[j]>queue[k]) \*PE#RB#6
break; ||2%N/?
SortUtil.swap(queue,j,k); qY&(O`?m&
k = j; Cpzdk~+H
} tzl,r"k3
} [1~3\-Y
-/3h&g
} vkLt#yj~
=Q"thsR
} <S_0=U
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SortUtil： VK9E{~0=
bO6z;D#
package org.rut.util.algorithm; "-fyX!
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import org.rut.util.algorithm.support.BubbleSort; 0"-H34M<D
import org.rut.util.algorithm.support.HeapSort; SFzoRI=qG
import org.rut.util.algorithm.support.ImprovedMergeSort; x1 LI&
import org.rut.util.algorithm.support.ImprovedQuickSort; AsS~TLG9p
import org.rut.util.algorithm.support.InsertSort; 'bv(T2d~~
import org.rut.util.algorithm.support.MergeSort; 4o''C |ND
import org.rut.util.algorithm.support.QuickSort; .yzXw8~S
import org.rut.util.algorithm.support.SelectionSort; :wzbD,/M
import org.rut.util.algorithm.support.ShellSort; ?@A@;`0Y
@#"K6
/** :A#'8xE/
* @author treeroot b5p;)#
* @since 2006-2-2 }+ W5Snx
* @version 1.0 =M{&g
*/ wQ-BY"cK\
public class SortUtil { ")boY/ P/w
public final static int INSERT = 1; q89yW)XG
public final static int BUBBLE = 2; a"+VP>4
public final static int SELECTION = 3; b6g9!
public final static int SHELL = 4; 9~,!+#
public final static int QUICK = 5; GNG.N)q#C
public final static int IMPROVED_QUICK = 6; : Q,O:
public final static int MERGE = 7; Z(E.F,k
public final static int IMPROVED_MERGE = 8; bz&9]%S<
public final static int HEAP = 9; ,0L< wa
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public static void sort(int[] data) { R^E-9S\@
sort(data, IMPROVED_QUICK); WUDXx %
} PC=s:`Y}R
private static String[] name={ PVKq&Q?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N}|1oQkjf
}; Q<osYO{l
<!u(_Bxw/
private static Sort[] impl=new Sort[]{ G4F~V't
new InsertSort(), #.j:P#
new BubbleSort(), 9Up>e
new SelectionSort(), Rlr[uU_
new ShellSort(), Cn9MboXX
new QuickSort(), ht:L L#b*(
new ImprovedQuickSort(), ,!~U5~
new MergeSort(), 4[0.M
new ImprovedMergeSort(), ']Km%uwL
new HeapSort() 8W.-Y|[5?
}; z ISy\uka
/Wjf"dG}
public static String toString(int algorithm){ < Lrd(b;
return name[algorithm-1]; .bMU$O1
} +w?1<Z
bF@iO316H
public static void sort(int[] data, int algorithm) { ^w RD|
impl[algorithm-1].sort(data); P.|g4EdND
} ~fA H6FdZ\
zpcm`z
public static interface Sort { lVb;,C%K
public void sort(int[] data); KrECAc
} @0:mP
}>Lz\.Z/+[
public static void swap(int[] data, int i, int j) { FLlL0Gu
int temp = data; P[cGCmM
data = data[j]; *u<@_Oa
data[j] = temp; "jl`FAu)q
} 3TD!3p8
} l5k]voG