[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; ?5%0zMC
} Jgf73IX[
int i1=l; ^'UJ&UfX
int i2=mid+1; J9tQ@3{f
for(int cur=l;cur<=r;cur++){ L5E|1T
if(i1==mid+1) t-xw=&!w
data[cur]=temp[i2++]; MZpG1
else if(i2>r) l'_P]@*
data[cur]=temp[i1++]; YQB.3
else if(temp[i1] data[cur]=temp[i1++]; %&c+}m
else KUr}?sdz
data[cur]=temp[i2++]; ;ew3^i.du
} l7{Xy_66
} t)yWQV
I?).D?o
} Z#-:zD7_
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改进后的归并排序: 8s,B,s.
U!GG8;4
package org.rut.util.algorithm.support; H.8f-c-4we
m=Z1DJG
import org.rut.util.algorithm.SortUtil; R7/"ye:7J
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/** c,$ >u,4
* @author treeroot Us4ijR d
* @since 2006-2-2 hFDY2Cp]D
* @version 1.0 sqAZjfy@
*/ .A: #l?
public class ImprovedMergeSort implements SortUtil.Sort { pRt=5WZ
vJX3fE}F
private static final int THRESHOLD = 10; ;C1]gJZ,
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/* 7XE |5G
* (non-Javadoc) Q:.q*I!D<4
* S7tc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _N4G[jQLJ
*/ /cPezX
public void sort(int[] data) { WU:~T.Su
int[] temp=new int[data.length]; uG1)cm B}
mergeSort(data,temp,0,data.length-1); f'hrS}e
} Mlr\#BO"9
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private void mergeSort(int[] data, int[] temp, int l, int r) { M.|@|If4?
int i, j, k; jhd&\z-
int mid = (l + r) / 2; ;\P\0pI50
if (l == r) 5iE-$,7#L
return; BDW%cs
if ((mid - l) >= THRESHOLD) +|#lUXC
mergeSort(data, temp, l, mid); PU0Ha
else h J*2q"
insertSort(data, l, mid - l + 1); 0w'%10"&U+
if ((r - mid) > THRESHOLD) _*d8:|qw
mergeSort(data, temp, mid + 1, r); @dl{.,J
else [O) Q\|k
insertSort(data, mid + 1, r - mid); s-V5\Lip,
9#K,@X5 j
for (i = l; i <= mid; i++) { idWYpU>gC
temp = data; fi5x0El
} ZWZRG-:&H
for (j = 1; j <= r - mid; j++) { .h!oo;@
temp[r - j + 1] = data[j + mid]; Czj]jA(0f
} ,e6n3]W8
int a = temp[l]; [ML%u$-
int b = temp[r]; ^Ht!~So
for (i = l, j = r, k = l; k <= r; k++) { *VJT]^_
if (a < b) { PuKT0*_ 7
data[k] = temp[i++]; vM_UF{a$=
a = temp; dso6ZRx
} else { V)[ta`9
data[k] = temp[j--]; ,(h:0L2v7d
b = temp[j]; }m!L2iK4qk
} q J)[2:.G
} Q\WH2CK
} AfU~k!4`
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/** SFKfsb!C
* @param data i98>=y~
* @param l mB.ybrig
* @param i 5](-(?k}~
*/ 8ZmU(m
private void insertSort(int[] data, int start, int len) { N~c Y~a
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \UBTNY,
} `:=af[n
} rCOH*m&
} X~m*`UH
} +M@,CbqD
PtfxF]%H
堆排序： ="~yD[S
HF(pC7/a:
package org.rut.util.algorithm.support; u"WqI[IV
$~$NQe!/
import org.rut.util.algorithm.SortUtil; ]+C;C
3>Ne_kY
/** *@2+$fgz
* @author treeroot [SnnOqWw
* @since 2006-2-2 a]JQZo1$
* @version 1.0 Me*woCos'
*/ ]3u$%vc
public class HeapSort implements SortUtil.Sort{ @-^jbmu^ P
<=1nr@L
/* (non-Javadoc) ,{tz%\,%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PWavq?SR
*/ 6),U(e%
public void sort(int[] data) { e}F1ZJz
MaxHeap h=new MaxHeap(); =g]Ln)jc
h.init(data); Kx8>
for(int i=0;i h.remove(); m%?+;V
System.arraycopy(h.queue,1,data,0,data.length); _'CYS3-P3
} S,I|8 YE
lWiC$
private static class MaxHeap{ hxt,%al
1[? xU:;9
void init(int[] data){ \{g;|Z1
this.queue=new int[data.length+1]; F.N4Q'2Z
for(int i=0;i queue[++size]=data; @<^_ _."
fixUp(size); Cob<N'.
} Mk:k0,z
} zB/)_AW
p3e_:5k
private int size=0; AK$h SM
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private int[] queue; Ym]Dlz,o
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public int get() { |._9;T-Yde
return queue[1]; QTy xx
} {[ E7Cf
z_gjC%(y
public void remove() { +Jf45[D
SortUtil.swap(queue,1,size--); |i/Iv
fixDown(1); Xp_3EQl
} U]8 @
file://fixdown Xa=M{x
private void fixDown(int k) { lZ\Si
int j; dg(fD>+
while ((j = k << 1) <= size) { nVSuvq|S
if (j < size %26amp;%26amp; queue[j] j++; ?;q
if (queue[k]>queue[j]) file://不用交换 |=\w b^l+
break; z?b[ 6DLV;
SortUtil.swap(queue,j,k); PkqOBU*|=
k = j; b*AL,n?
} RhL!Zz
} J&vmW}&
private void fixUp(int k) { ! u4'1jd[d
while (k > 1) { Za5bx,^
int j = k >> 1; mbZS J
if (queue[j]>queue[k]) S8zc1!
break; {H\(H_X
SortUtil.swap(queue,j,k); KRL9dD,&
k = j; Msk^H7
} eM>f#M
} *.+Eg$'~V
UNc[h&@_
} =9LeFrz
\Y?ByY
} _NkVi_UX
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SortUtil： G#|`Bjv"aP
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package org.rut.util.algorithm; C}7c:4c
oD@~wcMIT0
import org.rut.util.algorithm.support.BubbleSort; A.D@21py
import org.rut.util.algorithm.support.HeapSort; 1TuN
import org.rut.util.algorithm.support.ImprovedMergeSort; 2$Fy?08q
import org.rut.util.algorithm.support.ImprovedQuickSort; RCgn\
import org.rut.util.algorithm.support.InsertSort; ;q3"XLV(T[
import org.rut.util.algorithm.support.MergeSort; l9zkx'xt.-
import org.rut.util.algorithm.support.QuickSort; Z2%ySO
import org.rut.util.algorithm.support.SelectionSort; App9um3:
import org.rut.util.algorithm.support.ShellSort; S<-e/`p=H
|k3^ eeLk
/** Bq20U:f
* @author treeroot ~.dmfA{
* @since 2006-2-2 T&/ ]|4
* @version 1.0 H J8rb
*/ iaq+#k@V
public class SortUtil { {cYS0%Go
public final static int INSERT = 1; ?xb4y=P7
public final static int BUBBLE = 2; -=+@/@nV
public final static int SELECTION = 3; ;(Xig$k
public final static int SHELL = 4; >7fNxQ
public final static int QUICK = 5; u=U.+\f5
public final static int IMPROVED_QUICK = 6; ly8IrgtKy
public final static int MERGE = 7; LzS)WjEN
public final static int IMPROVED_MERGE = 8; |#)S`Ua1
public final static int HEAP = 9; @_+B'<2
g aq"+@fH
public static void sort(int[] data) { 8,l~e8&
sort(data, IMPROVED_QUICK); Pf4b/w/
} AMm)E
private static String[] name={ XITh_S4fs=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H/v|H}d;
}; 15/lX
_tJm0z!
private static Sort[] impl=new Sort[]{ pI>[^7
new InsertSort(), +W8L^Wl
new BubbleSort(), q\`0'Z,
new SelectionSort(), IGtpL[.;/
new ShellSort(), _@gd9Fi7J
new QuickSort(), WqHsf1?N
new ImprovedQuickSort(), V/8"@C
new MergeSort(), @C?.)#
new ImprovedMergeSort(), O\"k[V?.V
new HeapSort() s_p\ bl.
}; (sfy14>\
bS!4vc1`2
public static String toString(int algorithm){ J'=iEI
return name[algorithm-1]; {?zBc E:
} ~kJ}Z<e
jnu!a.H
public static void sort(int[] data, int algorithm) { 4dgo*9
impl[algorithm-1].sort(data); [PI!.9H
} DMcH, _(
u@{z xYn
public static interface Sort { c=52*&
public void sort(int[] data); 7@6B\':
} 'T7=.Hq<4
!UV1OU
public static void swap(int[] data, int i, int j) { )yj:P
int temp = data; PE\.JU
data = data[j]; gI/#7Cr
data[j] = temp; B}&9+2M
} ~hk;OB;
} X;vfbF