[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; &Ky_v^
} T.qNCJmB
int i1=l; ?|ZTaX6A
int i2=mid+1; 6O}`i>/6M
for(int cur=l;cur<=r;cur++){ Z"uY}P3
if(i1==mid+1) ]TyisaT
data[cur]=temp[i2++]; )uqA(R>
else if(i2>r) qvv2O1c"A
data[cur]=temp[i1++]; 8{Fsm;UsY
else if(temp[i1] data[cur]=temp[i1++]; -G|G_$9
else w#g#8o>'
data[cur]=temp[i2++]; \l@,B +)
} HuVJ\%.
} ;Yg{zhJX~
//4Xq8y
} "^1L'4'S
kGN+rHo
改进后的归并排序: gL3"Gg3
-k7X:!>QHC
package org.rut.util.algorithm.support; Q(\4]i< S
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import org.rut.util.algorithm.SortUtil; <fs2fTUeqF
U2%.S&wS,e
/** 3dDX8M?
* @author treeroot ]$,UPR/3
* @since 2006-2-2 %=BMZRn
* @version 1.0 bl'z<S, '
*/ YLVPAODY
public class ImprovedMergeSort implements SortUtil.Sort { s|NjT
UDL RCS8i
private static final int THRESHOLD = 10; 5P'p2x#U
oy;K_9\
/* LvEnXS
* (non-Javadoc) !XzF67
* po}F6m8bX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C*G=cs\i
*/ -<_Ww\%8M
public void sort(int[] data) { U5r7j
int[] temp=new int[data.length]; N72Yq)(
mergeSort(data,temp,0,data.length-1); 0V!l,pg
} yA3wtm/?
<u=4*:QE
private void mergeSort(int[] data, int[] temp, int l, int r) { _fwb!T}$
int i, j, k; <Tot|R;
int mid = (l + r) / 2; ]K*8O<
if (l == r) sQ8s7l0D
return; 7K{Nb
if ((mid - l) >= THRESHOLD) 84{Q\c
mergeSort(data, temp, l, mid); A%2:E^k(s
else _A0mxq
insertSort(data, l, mid - l + 1); oY=q4D
if ((r - mid) > THRESHOLD) 1* ]Ev
mergeSort(data, temp, mid + 1, r); 8x[YZ@iM-
else /NFz4h=>
insertSort(data, mid + 1, r - mid); bTSL<"(]N
=GXu 5 8
for (i = l; i <= mid; i++) { aIXdV2QS
temp = data; )$Z=t-q
} wWXD\{Hk
for (j = 1; j <= r - mid; j++) { 2+Wzf)tB
temp[r - j + 1] = data[j + mid]; `4 y]Z)
} 8#&q$kE
int a = temp[l]; s-ZI ^I2\
int b = temp[r]; K2<~(78C
for (i = l, j = r, k = l; k <= r; k++) { z~\t|Z]G,|
if (a < b) { )H}#A#ovj7
data[k] = temp[i++]; SZ_V^UX_
a = temp; 4&cL[Ny
} else { |G/7_+J6
data[k] = temp[j--]; lW 81q2n
b = temp[j]; P%MfCpyj
} 3! ~K^Z]
} Mzd[fR5a8
} $@i"un;
4R8G&8b
/** _pH{yhA
* @param data T{}fHfM
* @param l &''WRgZ}
* @param i K]xa/G(
*/ Cb:gH}j
private void insertSort(int[] data, int start, int len) { WGAXIQ
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !7d*v3)d
} %5*@l vy
} U'*t~x<
} BtY%r7^o
} UgN28YrW
-!({BH-M_
堆排序： pDhse2
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package org.rut.util.algorithm.support; }!i`0p
&J!aw
import org.rut.util.algorithm.SortUtil; 6q>+!kXh
[/_+>M
/** =\t /u
* @author treeroot dXn%lJ
* @since 2006-2-2 5TUNX^AW
* @version 1.0 )J(q49
*/ |~<N -~.C
public class HeapSort implements SortUtil.Sort{ 0ji q-3V)
*U#m+@\0
/* (non-Javadoc) tMj1~ R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0L^u2HZYL
*/ KTEZ4K^o=
public void sort(int[] data) { S.|FL%;
MaxHeap h=new MaxHeap(); #;#3%?
h.init(data); ^ZTGJ(j7~
for(int i=0;i h.remove(); 19q{6X`x
System.arraycopy(h.queue,1,data,0,data.length); j6ut}Uq
} !q"CV
k8]O65t|
private static class MaxHeap{ 2-0$FQ@/
smQVWs>
void init(int[] data){ +{53a_q
this.queue=new int[data.length+1]; AD('=g J
for(int i=0;i queue[++size]=data; 4FMAz^
fixUp(size); 3_5XHOdE
} !8tS|C#2
} O''y>N9
SNT5Amz!
private int size=0; $WW)bP d4^
'PWQnt_U
private int[] queue; jQj,q{eA
Z"I/ NGiU
public int get() { %zo= K}u
return queue[1]; l+y-Fo@
} xU9@$am
H]#Rg`~n
public void remove() { l)+:4N?iVv
SortUtil.swap(queue,1,size--); .>6 Wv0
fixDown(1); Z$KV&.=+
} @\Js8[wS9@
file://fixdown +K6szGP
private void fixDown(int k) { #NRh\Wj|
int j; dX )W0
while ((j = k << 1) <= size) { /2NSZO
if (j < size %26amp;%26amp; queue[j] j++; gmSQcN)
if (queue[k]>queue[j]) file://不用交换 0NO1M)HQv
break; RM*f|j
SortUtil.swap(queue,j,k); 0&fl#]oCE
k = j; /owO@~G
} PQj<[rY
} ]y1fM0
private void fixUp(int k) { -g`IH-B
while (k > 1) { J^3H7 ]
int j = k >> 1; vH?9\3
if (queue[j]>queue[k]) CP` XUpX`&
break; (xyS7q]m
SortUtil.swap(queue,j,k); 8TZENRzx-|
k = j; Lu>H`B7Q"
} nwM)K
} h ; kfh.
)%JD8;[Jq
} <`g3(?
GHN3PEJ>
} G{c#\?12C
.]76!(fWZ
SortUtil： =ak7ldA=2
9XV^z*E(J
package org.rut.util.algorithm; IjZ@U%g@;
!Ua&0s%
import org.rut.util.algorithm.support.BubbleSort; 0\a8}b||
import org.rut.util.algorithm.support.HeapSort; [N|xzMe
import org.rut.util.algorithm.support.ImprovedMergeSort; {0's~U+@
import org.rut.util.algorithm.support.ImprovedQuickSort; g*-2* \
import org.rut.util.algorithm.support.InsertSort; N\R=cwk
import org.rut.util.algorithm.support.MergeSort; YL5>V$i
import org.rut.util.algorithm.support.QuickSort; y@apJ;_R-
import org.rut.util.algorithm.support.SelectionSort; v:d9o.h
import org.rut.util.algorithm.support.ShellSort; Q~ 0Dfow?
68x}w Ae
/** MTmO>V&O
* @author treeroot qa!RH]B3
* @since 2006-2-2 dbO#
* @version 1.0 YBSl-G'
*/ d\Jji 6W
public class SortUtil { lfS;?~W0k
public final static int INSERT = 1; !dv-8C$U
public final static int BUBBLE = 2; +{rJ[J/g
public final static int SELECTION = 3; C{Blqf3V0
public final static int SHELL = 4; D@vMAW
public final static int QUICK = 5; #@_1fE
public final static int IMPROVED_QUICK = 6; ^Rmoz1d
public final static int MERGE = 7; ndOfbu;mf
public final static int IMPROVED_MERGE = 8; Tb#
public final static int HEAP = 9; w:Q|?30
2a[9h#
public static void sort(int[] data) { ac6*v49
sort(data, IMPROVED_QUICK); ~Fx&)kegTo
} iVeQ]k(u
private static String[] name={ ="B n=>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .5g}rxO8
}; 7c::Qf[|
QHQj/)J8
private static Sort[] impl=new Sort[]{ %3,xaVN
new InsertSort(), ?~)Ak`=
new BubbleSort(), 0>Fqx{!heq
new SelectionSort(), B| Q6!
new ShellSort(), rl|Q)A{
new QuickSort(), ~t9Mh^gij
new ImprovedQuickSort(), ? ICDIn
new MergeSort(), /J;]u3e|
new ImprovedMergeSort(), k!13=Gh
new HeapSort() fq Y1ggL
}; 3'@&c?Fye
$Q4=37H+
public static String toString(int algorithm){ nW&$~d
return name[algorithm-1]; rv?!y8\
} d;g-3Pf
:r39wFi
public static void sort(int[] data, int algorithm) { 2v\W1VF
impl[algorithm-1].sort(data); 9Dq.lr^
} U_*3>Q
yqBa_XPV8
public static interface Sort { l"L+e!B~
public void sort(int[] data); 'bm:u
} IHVMHOq}'
yiO31uQt
public static void swap(int[] data, int i, int j) { qvTKfIl{
int temp = data; Ws>i)6[
data = data[j]; 6!RikEAh
data[j] = temp; -aN":?8(G
} irmwc'n]
} cUC17z2D