[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; =IsmPQKi
} xBTx`+%WS
int i1=l; D`a6D
int i2=mid+1; }]o8}$&(
for(int cur=l;cur<=r;cur++){ Nbd4>M<
if(i1==mid+1) <lf692.3
data[cur]=temp[i2++]; 'lA}E
else if(i2>r) oR2?$KF
data[cur]=temp[i1++]; {k_\1t(/
else if(temp[i1] data[cur]=temp[i1++]; `K.C>68
else x'x5tg
data[cur]=temp[i2++]; xj>P5\mW#
} fe/;U=te
} .b3h?R*&
JVX)>2&$
} 8O'bCBhv
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改进后的归并排序: : x&R'wX-
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package org.rut.util.algorithm.support; H@1'El\9
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import org.rut.util.algorithm.SortUtil; x:MwM?
s"=TM$Vb
/** SZ9Oz-?
* @author treeroot >^jBE''
* @since 2006-2-2 $45|^.b
* @version 1.0 l'EO@D/M
*/ \DQu!l@1U
public class ImprovedMergeSort implements SortUtil.Sort { @Z ==B%`
1Q(KZI
private static final int THRESHOLD = 10; l2St)`K8
Z&Ob,Ru
/* A4,{ep'Z!
* (non-Javadoc) *gwlW/%Fz
* ]{6/6jl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u>fMO9X}2
*/ wkx9@?2*
public void sort(int[] data) { RQQ'Wg
int[] temp=new int[data.length]; D#&9zR86F
mergeSort(data,temp,0,data.length-1); LVB wWlJ
} Hh^ "c}
'/u|32
private void mergeSort(int[] data, int[] temp, int l, int r) { #MA6eE'R
int i, j, k; (`dz37@*
int mid = (l + r) / 2; B<SE|~\2
if (l == r) Ux=~-}<-w
return; #("M4}~
if ((mid - l) >= THRESHOLD) ,yGbMOV
mergeSort(data, temp, l, mid); YQN:&Cls
else E,6|-V;?
insertSort(data, l, mid - l + 1); $M)i]ekm
if ((r - mid) > THRESHOLD) U=~?ca
mergeSort(data, temp, mid + 1, r); *0>`XK$mWo
else [WR"#y
insertSort(data, mid + 1, r - mid); !YAX.e
k5Cy/gR
for (i = l; i <= mid; i++) { D5c 8sB
temp = data; u @Ze@N%
} S=r0tao,!v
for (j = 1; j <= r - mid; j++) { TxPFl7,r
temp[r - j + 1] = data[j + mid]; &RZO\ZT
} ) 1AAL0F\B
int a = temp[l]; F9j@KC(yg
int b = temp[r]; tC'E#2
for (i = l, j = r, k = l; k <= r; k++) { =6dAF"b)
if (a < b) { NF8<9
data[k] = temp[i++]; )%@7tx
a = temp; %JE>Z]
} else { xkDK5&V
data[k] = temp[j--]; \PxT47[@e
b = temp[j]; N=\zx^w,
} eTp|!T
} }"TQ\v$
} v=@y7P1
r5~W/eE
/** @bA5uY!
* @param data $@'BB=i
* @param l X3}eq|r9
* @param i cOV9g)7^O
*/ M)oKtiav*
private void insertSort(int[] data, int start, int len) { 'd$RNqe
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ts,r,{
} */M`KPW
} {nwoJ'-V
} {jO+N+Ez9
} F `o9GLxM}
1GK.:s6.f
堆排序： /X_L>or
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package org.rut.util.algorithm.support; z+yq%O
kZG.Id
import org.rut.util.algorithm.SortUtil; d MR?pbD
33DP?nI}
/** 5=C?,1F$A
* @author treeroot !Sn|!:N4
* @since 2006-2-2 x\G%
* @version 1.0 v%qOW)].
*/ ! eZls
public class HeapSort implements SortUtil.Sort{ i=#`7pt%'a
E\!X$
/* (non-Javadoc) \~*<[.8~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "M5
*/ CImp,k0
public void sort(int[] data) { 8Ij<t{Lps
MaxHeap h=new MaxHeap(); QZ&(e2z
h.init(data); [cnuK
for(int i=0;i h.remove(); o>8~rtl
System.arraycopy(h.queue,1,data,0,data.length); ;<garDf
} R278^E
N-upNuv
private static class MaxHeap{ [<53_2]~
Eto"B"
void init(int[] data){ YAc:QVT87
this.queue=new int[data.length+1]; <ZSXOh,'
for(int i=0;i queue[++size]=data; `w 6Qsah
fixUp(size); HMF2sc$N
} \eKXsO"d
} 1.+O2qB
}%Mdf6LS64
private int size=0; M v(Pp
nz?[
private int[] queue; xJ$uoy3+
zTcz+3x
public int get() { veq3t$sj
return queue[1]; A8&@Vxdz
} ! :]_-DX
#$BFTlm|
public void remove() { }eVDe(7_
SortUtil.swap(queue,1,size--); 3tf_\E+mIi
fixDown(1); ^!S4?<v
} ,pD sU@
file://fixdown `'s_5Ek
private void fixDown(int k) { DYf2V6'
int j; !tTv$L>
while ((j = k << 1) <= size) { ~frsgHW
if (j < size %26amp;%26amp; queue[j] j++; 68z#9}
if (queue[k]>queue[j]) file://不用交换 Sqn>L`Lz
break; nKGQU,C
SortUtil.swap(queue,j,k); @ 3=pFYW)
k = j; F[}#7}xjA
} x4v:67_^
} &)k=ccm
private void fixUp(int k) { 73X*|g[O
while (k > 1) { ^}~Q(ji7
int j = k >> 1; hOB<6Tm[
if (queue[j]>queue[k]) 7N 0Bj!
break; Hes!uy
SortUtil.swap(queue,j,k); o>M^&)Xs
k = j; myA;Y
} 9wR D=a
} t}R!i-D|HB
8j>V?'Szk
} S} UYkns*
R7Qj<,
} ~}b0zL
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SortUtil： Q$U.vF7BnP
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package org.rut.util.algorithm; >;Hx<FKxP
(X@\2M4@T#
import org.rut.util.algorithm.support.BubbleSort; qR cSB
import org.rut.util.algorithm.support.HeapSort; HjK8y@j
import org.rut.util.algorithm.support.ImprovedMergeSort; (5jKUQ8Q>
import org.rut.util.algorithm.support.ImprovedQuickSort; 5b"=m9{g
import org.rut.util.algorithm.support.InsertSort; FL\pgbI
import org.rut.util.algorithm.support.MergeSort; ^rfR<Q`
import org.rut.util.algorithm.support.QuickSort; UUfM7gq
import org.rut.util.algorithm.support.SelectionSort; q,ie)`
import org.rut.util.algorithm.support.ShellSort; <2]h$53y!
u;9iuc`*
/** c{Z "'t7
* @author treeroot 0\!Bh^++1
* @since 2006-2-2 Mi.2 >
* @version 1.0 I?D=Q$s
*/ q*lk9{>
public class SortUtil { P\Qvj7_
public final static int INSERT = 1; YMu#<ZG
public final static int BUBBLE = 2; c<_1o!68
public final static int SELECTION = 3; CfW#Wk:8J
public final static int SHELL = 4; _XZK2Q[
public final static int QUICK = 5; q}Po)IUT`5
public final static int IMPROVED_QUICK = 6; =*'yGB[x)
public final static int MERGE = 7; #6c,_!
public final static int IMPROVED_MERGE = 8; SHYekX
public final static int HEAP = 9; g"n>v c7
0Lj;t/mG
public static void sort(int[] data) { 9QP=
sort(data, IMPROVED_QUICK); h:bx0:O"
} s;P _LaIp)
private static String[] name={ fZf>>mu@r'
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H%m^8yW1
}; X$==J St
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private static Sort[] impl=new Sort[]{ VJ-t#q"
new InsertSort(), Po=:-Of:
new BubbleSort(), <9>L^GgXA
new SelectionSort(), ^e^-1s S
new ShellSort(), agfDx^,
new QuickSort(), L$c 1<7LU
new ImprovedQuickSort(), 5(#z)T
new MergeSort(), 8-+# !]
new ImprovedMergeSort(), 4wKCzPy
new HeapSort() Fb<'L5}i
}; 0(c,J$I]Z!
&kdW(;`
public static String toString(int algorithm){ S".|j$
return name[algorithm-1]; <P1nfH
} R5b,/>^'A
MMjewGxe
public static void sort(int[] data, int algorithm) { ):G+*3yb
impl[algorithm-1].sort(data); +>1Yp">?
} x3'ANw6E
2Ax(q&`9
public static interface Sort { dKPXs-5
public void sort(int[] data); "8a V~]~Dj
} ]NaH *\q
SLP$|E;
public static void swap(int[] data, int i, int j) { J",Cwk\
int temp = data; t_I-6`8o]
data = data[j]; nZj&Ma7R
data[j] = temp; pDP* 3
} 6$PQ$
} =^M Q 4