[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; 8;3I:z&muQ
} h,MaF<~
int i1=l; &sJ6k/l
int i2=mid+1; >ATccv
for(int cur=l;cur<=r;cur++){ QC1\Sn/
if(i1==mid+1) 2FN#63
data[cur]=temp[i2++]; {C%f~j
else if(i2>r) IKp/xj[!
data[cur]=temp[i1++]; mU>lm7'
else if(temp[i1] data[cur]=temp[i1++]; ]C-a[
else ]1q`N7
data[cur]=temp[i2++]; #V@vz#bo=
} fDChq[LAn
} :M@#.
X09i+/ICK
} byk9"QeY\
{@t6[g++
改进后的归并排序: '*K%\]
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package org.rut.util.algorithm.support; {t('`z
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import org.rut.util.algorithm.SortUtil; yM?jiy
c:-n0m'i
/** L,sXJ23.
* @author treeroot I\=&v^]
* @since 2006-2-2 9*(uJA
* @version 1.0 uA\KbA.c;U
*/ I%mGb$Q
public class ImprovedMergeSort implements SortUtil.Sort { 4CxU eq
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private static final int THRESHOLD = 10; <t,lq
wf~n>e^e
/* .h@bp1)l
* (non-Javadoc) U;Yw\&R,
* Tqx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <,&t}7M/:
*/ 2bOFH6g
public void sort(int[] data) { J>+~//C
int[] temp=new int[data.length]; zHXb[$Q
mergeSort(data,temp,0,data.length-1); pH396GFIW
} A/~^4DR
+ ;B K|([#
private void mergeSort(int[] data, int[] temp, int l, int r) { F^cu!-L
int i, j, k; 41i#w;ojI
int mid = (l + r) / 2; z[]8"C=
if (l == r) 3o_@3-Y%
return; [h0)V(1KR
if ((mid - l) >= THRESHOLD) n-CFB:L
mergeSort(data, temp, l, mid); /,+&O#SX
else |bk$VT4\
insertSort(data, l, mid - l + 1); =qww|B92
if ((r - mid) > THRESHOLD) 9y;zk$O8
mergeSort(data, temp, mid + 1, r); jjg[v""3|
else "X-"uIc
insertSort(data, mid + 1, r - mid); 4z^VwKH\j
&C6*"JZ4
for (i = l; i <= mid; i++) { S|_"~Nd=
temp = data; 5Qxm\?0J
} VW**N}1#C
for (j = 1; j <= r - mid; j++) { xsx0ZovhY
temp[r - j + 1] = data[j + mid]; C=DC g
} .s3y^1C
int a = temp[l]; D|/ 4),v
int b = temp[r]; ^7Z.~A y
for (i = l, j = r, k = l; k <= r; k++) { Y-]Ne"+vf
if (a < b) { vgKdhN2kI
data[k] = temp[i++]; >2#F5c67
a = temp; v<gve<]
} else { BBj>ML\X
data[k] = temp[j--]; 28lor&Cc
b = temp[j]; piAFxS<6
} v.>95|8
} [9~6, ;6
} nOU.=N v`
*YP;HL
/** H) q_9<;
* @param data uL=FK
* @param l k}e~xbh-y
* @param i #6 M3BF
*/ cTdX'5
private void insertSort(int[] data, int start, int len) { q)y<\cEO
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {br6*
} y2>AbrJ
} \!4_m8?
} gLWbd~
} pUeok+k_
gO_d!x*
堆排序： rC6{-42bb
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package org.rut.util.algorithm.support; US]I[Y6V
yzyK$WN\[3
import org.rut.util.algorithm.SortUtil; U;FJSy
b4>1UZGW-
/** Url8&.pw
* @author treeroot *^p^tK
* @since 2006-2-2 d{(NeTs
* @version 1.0 LDj*~\vsq
*/ BSyS DM
public class HeapSort implements SortUtil.Sort{ }}zY]A
h&:XO9dY
/* (non-Javadoc) ?GeMD /]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {w<"jw&2
*/ F;Bq[V)R
public void sort(int[] data) { SH6T\}X:
MaxHeap h=new MaxHeap(); i: VMCNH
h.init(data); IkgRZ{Y
for(int i=0;i h.remove(); x\K,@
System.arraycopy(h.queue,1,data,0,data.length); SF[}suL
} :[ll$5E.
J{PNB{v
private static class MaxHeap{ G@o\D-$
$)VnHr `hy
void init(int[] data){ uS5ADh
this.queue=new int[data.length+1]; '_FxxLAO
for(int i=0;i queue[++size]=data; r|Q/:UV?w
fixUp(size); 1krSX2L
} :} DTK
} 4Xe8j55
iB5'mb*
private int size=0; %ZGG6Xgw
C\}M_MD
private int[] queue; f^G-ba
Er<!8;{?
public int get() { {EyWSf"
return queue[1]; X1^Q1?0
} !PJp()
sv+6#
public void remove() { E>bpq^;r
SortUtil.swap(queue,1,size--); c2fw;)j&X
fixDown(1); oe[f2?-
} :O]US)VSj
file://fixdown aJ J63aJ
private void fixDown(int k) { f;obK~b[
int j; =s,}@iqNO4
while ((j = k << 1) <= size) { ? w@)3Z=u
if (j < size %26amp;%26amp; queue[j] j++; 9~4@AGL
if (queue[k]>queue[j]) file://不用交换 QNGp+xUHJ9
break; kp^q}iS
SortUtil.swap(queue,j,k); 7 /XfPF
k = j; &M6Zsmo
} u4DrZ-v
} 3|4<SMm
private void fixUp(int k) { ?7A>|p?"
while (k > 1) { 96<0=
int j = k >> 1; Jo:S*D
if (queue[j]>queue[k]) 6T%5<I*&3s
break; ,z`* 1b8
SortUtil.swap(queue,j,k); Xx ou1l!
k = j; \hg%J/
} zB'_YwW
} Koc5~qUY]
Dfy=$:Q
} jt3=<&*Bm
_3q}K
} Zhc99L&K
m[s$)-T
SortUtil： DC2[g9S>8@
6bT>x5?
package org.rut.util.algorithm; ^m-w@0^z
'Ej+Jczzpp
import org.rut.util.algorithm.support.BubbleSort; 3|bbJ6*.<
import org.rut.util.algorithm.support.HeapSort; X u2+TK
import org.rut.util.algorithm.support.ImprovedMergeSort; 0e(4+:0
import org.rut.util.algorithm.support.ImprovedQuickSort; +6:jm54
import org.rut.util.algorithm.support.InsertSort; i'[! 'HY
import org.rut.util.algorithm.support.MergeSort; :jFZz%
import org.rut.util.algorithm.support.QuickSort; $0Un'"`S
import org.rut.util.algorithm.support.SelectionSort; R]4 h)"
import org.rut.util.algorithm.support.ShellSort; >LJ<6s[=
3;3 cTXR?=
/** .HPa\b\L>
* @author treeroot uj+{ tc
* @since 2006-2-2 -x-EU#.G
* @version 1.0 6_>(9&g`zV
*/ 2Mj_wc
public class SortUtil { M"yOWD~s~
public final static int INSERT = 1; o,{]<Sm
public final static int BUBBLE = 2; me$nP}%C&
public final static int SELECTION = 3; wxy@XN"/i+
public final static int SHELL = 4; -Sa-eWP
public final static int QUICK = 5; %uvA3N>
public final static int IMPROVED_QUICK = 6; $f+cd8j?o
public final static int MERGE = 7; 2Q;rSe._`
public final static int IMPROVED_MERGE = 8; C=JS]2W2
public final static int HEAP = 9; x|)pZa
^7YZ>^
public static void sort(int[] data) { Jv?EV,S/e
sort(data, IMPROVED_QUICK); S{N=9934_
} Ey{p;;H
private static String[] name={ SNSHX2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gi$'x^]#
}; #x \YA#~
2x~Pq_?y
private static Sort[] impl=new Sort[]{ M,<UnAVP-
new InsertSort(), 8WC_CAP
new BubbleSort(), 0bteI*L
new SelectionSort(), ZtY?X- 4_
new ShellSort(), ~Gl5O`w(
new QuickSort(), d '\^S}
new ImprovedQuickSort(), 0 gR_1~3
new MergeSort(), S}qGf%
new ImprovedMergeSort(), rA}mp]
new HeapSort() S_38U
}; 9U Hh#
*bUOd'vh
public static String toString(int algorithm){ gyxC)br
return name[algorithm-1]; 2?:'p[z"]
} LuVL<W
$@84nR{>
public static void sort(int[] data, int algorithm) { v>_83P`
impl[algorithm-1].sort(data); "^wIixOH5
} ;7*T6~tv
yw{r:fy
public static interface Sort { ~zVe?(W
public void sort(int[] data); /#zs
} oA3;P]~[
*:ErZ UyQM
public static void swap(int[] data, int i, int j) { V!NRBXg
int temp = data; wLNkXC
data = data[j]; ?} lqu7S
data[j] = temp; L nyow}
} Pk=0pHH8q
} -Ua&/Yd/}