[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; O3w_vm'
} /YugQ.>| l
int i1=l; }Cq9{0by?a
int i2=mid+1; sh))[V"8
for(int cur=l;cur<=r;cur++){ @<w9fzi
if(i1==mid+1) xO9]yULgu
data[cur]=temp[i2++]; Zxxy1Fl#.[
else if(i2>r) XdIVMXLL\
data[cur]=temp[i1++]; kO`3ENN
else if(temp[i1] data[cur]=temp[i1++]; k.%W8C<Pa
else 1KIq$lG{ E
data[cur]=temp[i2++]; o YI=p3l
} 6L6~IXL>
} -JQg ~1
<sWcS; x
} @tv];t
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改进后的归并排序: {@K2WB
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package org.rut.util.algorithm.support; vL=--#
D@b<}J>0'
import org.rut.util.algorithm.SortUtil; T~~$=vP9
uI-76
/** @01D1A
* @author treeroot m)]fJ_
* @since 2006-2-2 Mb2 L32
* @version 1.0 ZEyGqCf3
*/ R#Nd|f<
public class ImprovedMergeSort implements SortUtil.Sort { oQjB&0k4
1PTu3o&3
private static final int THRESHOLD = 10; ~ GT\RAj[
xdBZ^Q
/* 5bznM[%xO
* (non-Javadoc) Gv+Tg/
* ?VN]0{JSp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) WoWM
*/ \A\yuJ=
public void sort(int[] data) { (R*jt,x
int[] temp=new int[data.length]; zQj%ds:
mergeSort(data,temp,0,data.length-1); {7~ $$AR(
} IweK!,:>dN
'St= izhd
private void mergeSort(int[] data, int[] temp, int l, int r) { 674oL,
int i, j, k; d|?(c~
int mid = (l + r) / 2; >8fz ?A
if (l == r) L9YwOSb.
return; k| cI!
if ((mid - l) >= THRESHOLD) 2=,Sz1`t
mergeSort(data, temp, l, mid); [oN> :
else I7z]%Z
insertSort(data, l, mid - l + 1); W*DIW;8p
if ((r - mid) > THRESHOLD) ZM^;%(
mergeSort(data, temp, mid + 1, r); Am?Hkh2
else #IrP"j^
insertSort(data, mid + 1, r - mid); lnC Wu@{
|tJ%:`DGw
for (i = l; i <= mid; i++) { #`L}.
temp = data; &eS70hq
} 6'*Uo:]
for (j = 1; j <= r - mid; j++) { |>}0? '/]
temp[r - j + 1] = data[j + mid]; WKJL< D ]:
} }nY^T&?`
int a = temp[l]; f]A6Mx6
int b = temp[r]; ST8/ ;S#c
for (i = l, j = r, k = l; k <= r; k++) { `"b7y(M
if (a < b) { ]j$p_s>
data[k] = temp[i++]; "PScM9)\
a = temp; F*].
} else { 4Hpu EV8Q
data[k] = temp[j--]; utl=O
b = temp[j]; GGL4<P7
} wfTv<WG,.E
} Nu2]~W&
} #!&R7/ KdD
)"Br,uIv:/
/** v*fc5"3eO
* @param data IS4K$Ac.
* @param l vrnj}f[h
* @param i o3=S<|V
*/ N3c)ce7[
private void insertSort(int[] data, int start, int len) { }=m?gF%3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jMWwu+w
} +U)|&1oa
} ]9< 9F ?
} UpseU8Wo
} FRQ("6(
jLS]^|
堆排序： WJ8vHPSM
'*;eFnmvs:
package org.rut.util.algorithm.support; |{IU<o x
u2O^3rG-
import org.rut.util.algorithm.SortUtil; `b`52b\6S
`"":
/** RkP|_Bf8)
* @author treeroot $5CY<,f
* @since 2006-2-2 9x^ /kAB
* @version 1.0 AbI*/|sY
*/ !3Z|!JY
public class HeapSort implements SortUtil.Sort{ L\b_,'I
A'-YwbY
/* (non-Javadoc) C{,] 1X6g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mf_'| WDs
*/ +pViHOJu&V
public void sort(int[] data) { (ai-n,y
MaxHeap h=new MaxHeap(); |A/_Qe|s2
h.init(data); |Pl{Oo+
for(int i=0;i h.remove(); [Q_|6Di
System.arraycopy(h.queue,1,data,0,data.length); Ul0<Zxv
} UZ3Aq12U}a
\bA'Furp
private static class MaxHeap{ d]~1.i
$<e .]`R
void init(int[] data){ gL"Q.ybA
this.queue=new int[data.length+1]; #&KE_n
for(int i=0;i queue[++size]=data; )mVYqlU"
fixUp(size); >t2)Z|1
} rWpfAE)!
} mf[79:90^
o? "@9O?
private int size=0; 9}$dwl(
D c.WvUM
private int[] queue; j=%-b]
3Il/3\
public int get() { afq +;Sh
return queue[1]; n(Op<
} )^#Zg8L
[y;ZbfMP|o
public void remove() { (MiOrzT
SortUtil.swap(queue,1,size--); }(}vlL
fixDown(1); s\FNKWQ
} T\CQ
file://fixdown @Hdg-f>y]
private void fixDown(int k) { > 0)`uJ
int j; Z@O e}\.$
while ((j = k << 1) <= size) { 6v)eM=
if (j < size %26amp;%26amp; queue[j] j++; ^F9zS`Yz2
if (queue[k]>queue[j]) file://不用交换 R*eM 1
break; 2#}IGZ`Yp/
SortUtil.swap(queue,j,k); zn$Ld,
k = j; Jiylrf`o
} 1Klu]J%
} ~6i mkv^ F
private void fixUp(int k) { &n kGdHX/a
while (k > 1) { .h^Ld,Chj
int j = k >> 1; u`,R0=<4
if (queue[j]>queue[k]) A_U0HVx_
break; K :ptfD
SortUtil.swap(queue,j,k); Bin&:%|9?
k = j; 3"D00~
} x+`3G.
} R:x04!}
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} Xb 1^Oj
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} sswAI|6ou
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SortUtil： 2DdLqZY#
?+o7Y1 k,
package org.rut.util.algorithm; T7_rnEOO
58U[r)/
import org.rut.util.algorithm.support.BubbleSort; )WJI=jl
import org.rut.util.algorithm.support.HeapSort; )3">%1R
import org.rut.util.algorithm.support.ImprovedMergeSort; oYx f((x
import org.rut.util.algorithm.support.ImprovedQuickSort; 98nLj9
import org.rut.util.algorithm.support.InsertSort; [/j-d
import org.rut.util.algorithm.support.MergeSort; GQxJ (f
import org.rut.util.algorithm.support.QuickSort; 0Hf-~6
import org.rut.util.algorithm.support.SelectionSort; 481u1
import org.rut.util.algorithm.support.ShellSort; PP|xIAc
$& gidz/w
/** Gfch|Q^INy
* @author treeroot !`E2O*g
* @since 2006-2-2 '-TFrNO;h
* @version 1.0 o|E(_Y4d
*/ fltcdA
public class SortUtil { u)>*U'bM
public final static int INSERT = 1; c{(%+
public final static int BUBBLE = 2; rn*VL(Yd(
public final static int SELECTION = 3; 824%]i3
public final static int SHELL = 4; MRu+:Y=K
public final static int QUICK = 5; cu|q&
public final static int IMPROVED_QUICK = 6; 'Q,<_L"
public final static int MERGE = 7; 8Wp1L0$B
public final static int IMPROVED_MERGE = 8; h0}-1kVT^
public final static int HEAP = 9; KJZY.7
_fw'c*j
public static void sort(int[] data) { lR^Qm|
sort(data, IMPROVED_QUICK); 6 VDF@V$E
} 'o9V0#$!
private static String[] name={ Y:BrAa[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 24l9/v'
}; 2b1:Tt9
Ut@)<N
private static Sort[] impl=new Sort[]{ `?m(Z6'
new InsertSort(), '11hIu=:
new BubbleSort(), Hb4rpAeP
new SelectionSort(), (b!DJ;(O9
new ShellSort(), "<b84?V5
new QuickSort(), Vdyx74xX
new ImprovedQuickSort(), H-lRgJdc
new MergeSort(), \/zS@fz
new ImprovedMergeSort(), B)*%d7=x
new HeapSort() NYRNop( N#
}; UkQocZdZ
1-<Xi-=^{t
public static String toString(int algorithm){ Rvo<ISp
return name[algorithm-1]; 8yl/!O,v
} tJ3s#q6
EB,>k1IJ
public static void sort(int[] data, int algorithm) { !{\c`Z<#
impl[algorithm-1].sort(data); [r'M_foga*
} B9\o:eY
$R4\jIewV
public static interface Sort { ktb.fhO
public void sort(int[] data); ^jA}*YP
} #{sb>^BF
I`1=VC]^8
public static void swap(int[] data, int i, int j) { O[5ti=W
int temp = data; @^@-A\7[KO
data = data[j]; p%'((!a2
data[j] = temp; cd#TKmh7re
} -`o:W?V$u
} X_2I4Jz]6