[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; <G={Vfr
} aryr
int i1=l; ak zb<aT
int i2=mid+1; ]3G2mY;`"%
for(int cur=l;cur<=r;cur++){ t@\0$V \X
if(i1==mid+1) p5\b&~ g
data[cur]=temp[i2++]; [(XKqiSV
else if(i2>r) X%sc:V
data[cur]=temp[i1++]; 4Bz~_
else if(temp[i1] data[cur]=temp[i1++]; Y]PZ| G)
else d{&z^
data[cur]=temp[i2++]; 4-MA!&
} +?8nY.~,'
} o,L!F`W
WW.=>]7;
} 2rk_ ssvs
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改进后的归并排序: %PpB$
%/7`G-a.B
package org.rut.util.algorithm.support; B^ h!F8DC
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import org.rut.util.algorithm.SortUtil; yI!K quMC
fXN;N&I
/** Xs`/q}R
* @author treeroot dFlx6H+R!0
* @since 2006-2-2 YeQX13C"Z
* @version 1.0 &^Io\
*/ H5n"!!
public class ImprovedMergeSort implements SortUtil.Sort { ][Kj^7/
kF?\p`[a
private static final int THRESHOLD = 10; UU_k"D~
lPH]fWt<
/* *m2:iChY
* (non-Javadoc) {r"HR%*u
* Cpl\}Qn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lH[N*9G(
*/ e>[QF+e)y
public void sort(int[] data) { %}@^[E)
int[] temp=new int[data.length]; &\A$Rj)
mergeSort(data,temp,0,data.length-1); F[lHG,g-
} ?w.Yx$Z"
U;_;_
private void mergeSort(int[] data, int[] temp, int l, int r) { g)zy^aDf
int i, j, k; I$YF55uB
int mid = (l + r) / 2; n%Fa;!S
if (l == r) \(Iy>L.
return; Ut<_D8Tzx
if ((mid - l) >= THRESHOLD) 3KGDS9I
mergeSort(data, temp, l, mid); _\[Zr.y
else )gE:@3
insertSort(data, l, mid - l + 1); 5i0<BZDTef
if ((r - mid) > THRESHOLD) B!:(*lF
mergeSort(data, temp, mid + 1, r); _M?:N:e
else !cfn%+0
insertSort(data, mid + 1, r - mid); n[<Vj1n
)|:|.`H
for (i = l; i <= mid; i++) { 1\1o65en
temp = data; mesR)fTI
} ,E_hG3}}
for (j = 1; j <= r - mid; j++) { ]5^u^
temp[r - j + 1] = data[j + mid]; F](kU#3"S
} "*UHit;"+{
int a = temp[l]; 1iUy*p65:
int b = temp[r]; BQm H9g|2
for (i = l, j = r, k = l; k <= r; k++) { ^T^fowt=r
if (a < b) { M$w^g8F27H
data[k] = temp[i++]; aw(P@9]
a = temp; DY1o!thz)
} else { bygwoZ<E
data[k] = temp[j--]; kWWb<WRW:
b = temp[j]; hI"I#(*jA%
} s3q65%D
} _:{XL c
} N-suBRnW
q*2ljcb55
/** il*bsnwpZv
* @param data h4V.$e<T&
* @param l c|E
* @param i k1X<jC]P
*/ )+{'p0
private void insertSort(int[] data, int start, int len) { rXA7<_Vg
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); UlyX$f%2
} $Cte$jg{;
} *'Ch(c:rtH
} 7-)Y\D
} )=~1m85+5B
!x>P]j7A}Y
堆排序： +&|WC2#
zF{5!b
package org.rut.util.algorithm.support; srUpG&Bcx
K{N#^L!
import org.rut.util.algorithm.SortUtil; mI}'8.
@L`t/OD
/** ) ><{A
* @author treeroot .t\5H<z
* @since 2006-2-2 4%B${zP(.}
* @version 1.0 #[IQmU23
*/ zc(-dMlK
public class HeapSort implements SortUtil.Sort{ *8Gx_$t&
d"$ \fL
/* (non-Javadoc) R:11w#m7w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HdVGkv/
*/ B6,"S5@
public void sort(int[] data) { 9v^MZ^Y{
MaxHeap h=new MaxHeap(); 8%Pjx7'<
h.init(data); zL1H[}[z+
for(int i=0;i h.remove(); fY\QI =
System.arraycopy(h.queue,1,data,0,data.length); _uL m!ku
} Uc\\..Cf
<UeO+M(
private static class MaxHeap{ UA}k"uM
Aj-}G^>#
void init(int[] data){ an.)2*u
this.queue=new int[data.length+1]; je.mX/Lpj
for(int i=0;i queue[++size]=data; JIDE]f
fixUp(size); +.{_n(kU
} C%l~qf1n
} H=EvT'g
pkhZW8O
private int size=0; Aqq%HgY:t
\S3C"P%w
private int[] queue; IeE+h-3p
eo"6 \3z
public int get() { l1a=r:WhH
return queue[1]; ~,.Agx
} TR|G4l?
% `\8z
public void remove() { J7$5<
SortUtil.swap(queue,1,size--); RytQNwv3
fixDown(1); gZ:)l@ Wu
} .BuY[,I+
file://fixdown WC0@g5;1[
private void fixDown(int k) { v$lP?\P;}X
int j; (V}DPA
while ((j = k << 1) <= size) { s+9q:
if (j < size %26amp;%26amp; queue[j] j++; $}N'm
if (queue[k]>queue[j]) file://不用交换 HX?5O$<<N
break; EPW Iu)A
SortUtil.swap(queue,j,k); b>?X8)f2e
k = j; WnU"&XZ
} 76(&O
} >PfYHO
private void fixUp(int k) { uG~%/7Qt{
while (k > 1) { L3'o2@$
int j = k >> 1; 5YJLR;
if (queue[j]>queue[k]) Lr_+)l
break; @zW'!Ol
SortUtil.swap(queue,j,k); -TSn_XE
k = j; >cQ*qXI0
} qbpvTTF
} O]90F
USfOc
} Z'hW;^e%_z
BB>3Kj:|
} e=QnGT*b5
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SortUtil： >?'cZTNk]
~"iCx+pr
package org.rut.util.algorithm; (F +if
% =br-c
import org.rut.util.algorithm.support.BubbleSort; Hi|'
import org.rut.util.algorithm.support.HeapSort; %BC*h}KGH
import org.rut.util.algorithm.support.ImprovedMergeSort; GjfY
import org.rut.util.algorithm.support.ImprovedQuickSort; ?&j[Rj0pH
import org.rut.util.algorithm.support.InsertSort; JstX# z
import org.rut.util.algorithm.support.MergeSort; 6uOR0L
import org.rut.util.algorithm.support.QuickSort; 0'%R@|
import org.rut.util.algorithm.support.SelectionSort; 4L(axjMYU
import org.rut.util.algorithm.support.ShellSort; Cir==7A0
_\1wLcFj
/** \&n]W\
* @author treeroot KzG8K 6wZ
* @since 2006-2-2 Y6,< j|
* @version 1.0 T1LtO O
*/ [89#8|+
public class SortUtil { 1)X%n)2pr
public final static int INSERT = 1; A!x_R {,yH
public final static int BUBBLE = 2; NyFa2Ihd
public final static int SELECTION = 3; pg;agtI
public final static int SHELL = 4; S2@[F\|r
public final static int QUICK = 5; ZOi8)Y~
public final static int IMPROVED_QUICK = 6; |JtdCP{
public final static int MERGE = 7; FU E/uh
public final static int IMPROVED_MERGE = 8; OXK?R\ E+
public final static int HEAP = 9; ubjuuha"
H*?U@>UU
public static void sort(int[] data) { RgZBh04q
sort(data, IMPROVED_QUICK); &NL=Bd
} % Lhpj[C
private static String[] name={ r*OSEzGUz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" y9?BvPp+
}; o5-oQ_j
%e+hM $Q
private static Sort[] impl=new Sort[]{ ~6Vs>E4G
new InsertSort(), b`usRoD{+
new BubbleSort(), g>CF|Wj
new SelectionSort(), i-vhX4:bd
new ShellSort(), x~?,Wv|cm
new QuickSort(), x@;XyQq
new ImprovedQuickSort(), =\eM -"r
new MergeSort(), EgFV
new ImprovedMergeSort(), ;@Alr?y
new HeapSort() MMN2XxS
}; bW7tJ
v[q2OWcL
public static String toString(int algorithm){ ;oH17
return name[algorithm-1]; }3!83~Qbx
} snK$? 9vh
Zm>Q-7r9
public static void sort(int[] data, int algorithm) { 4/&Us
impl[algorithm-1].sort(data); ><mZOTn e;
} TxoMCN?7c
.9#4qoM'
public static interface Sort { )O#]Wvr
public void sort(int[] data); 4L85~l
} mVcpYyD|k
5?&k? v@
public static void swap(int[] data, int i, int j) { rbHrG<+7zO
int temp = data; {OL*E0
data = data[j]; u-=S_e
data[j] = temp; >k,bHGj?
} #I'W[\l~+
} `(vgBz`e[