[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; N 8OPeY
} UY+~xzm
int i1=l; 8,R]R=
int i2=mid+1; *w _j;
for(int cur=l;cur<=r;cur++){ _)|!.r&)63
if(i1==mid+1) ?Cws25G
data[cur]=temp[i2++]; $5A XE;~{
else if(i2>r) :J"e{|g',
data[cur]=temp[i1++]; HCu1vjU(]
else if(temp[i1] data[cur]=temp[i1++]; >}9TdP/oT
else uODsXi{z
data[cur]=temp[i2++]; \DHCf4,
} =nsY[ s<
} <7p2OPD
d+^;kse
} YZk&'w
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改进后的归并排序: cO8;2u,Gvi
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package org.rut.util.algorithm.support; t5_`q(:
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import org.rut.util.algorithm.SortUtil; ]oY~8HW
k\[2o
/** 56)B/0=
* @author treeroot 0L6L_;o
* @since 2006-2-2 <7zpHSFBq
* @version 1.0 V_~wWuZ-
*/ l>G#+#{
public class ImprovedMergeSort implements SortUtil.Sort { t.w?OyO
9\xw}ph
private static final int THRESHOLD = 10; yG_#>3sD+%
'!0CwZ 7
/* jIl-}/2
* (non-Javadoc) x:2_FoQ
* BgRiJFa.d[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z+}SM]m
*/ +vuW9
public void sort(int[] data) { yT>T Vq/e
int[] temp=new int[data.length]; wEp/bR1=
mergeSort(data,temp,0,data.length-1); Txxc-$z
} \-B>']:R4
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private void mergeSort(int[] data, int[] temp, int l, int r) { vr;7p[~
int i, j, k; ge`J>2
int mid = (l + r) / 2; jm?mO9p~
if (l == r) qM`SN4C
return; ZTun{Dw{
if ((mid - l) >= THRESHOLD) 5 909O
mergeSort(data, temp, l, mid); (lm/S_U$
else XyIw5 9
insertSort(data, l, mid - l + 1); 'FVT"M~
if ((r - mid) > THRESHOLD) #:yZJS9f9
mergeSort(data, temp, mid + 1, r); <s:Xj
else HP8pEo0Y
insertSort(data, mid + 1, r - mid); O+yR+aXr'8
C{Zv.+F
for (i = l; i <= mid; i++) { 4e(@b3y
temp = data; Uag1vW,c
} oacY-&
for (j = 1; j <= r - mid; j++) { *Dn{MD7,M
temp[r - j + 1] = data[j + mid]; XkD_SaL}
} v ipmzg(S
int a = temp[l]; zb4g\H 0
int b = temp[r]; h~1QmEat
for (i = l, j = r, k = l; k <= r; k++) { 9W8Dp?:
if (a < b) { 8}0 D?
data[k] = temp[i++]; "~ `-Jkm
a = temp; fG{oi(T
} else { 07#!b~N
data[k] = temp[j--]; Hy6Np62
b = temp[j]; ,|H!b%ZW
} 5|b/G
} 1@ina`!1O
} zknD(%a
cnsGP*w
/** I|M*yObl6
* @param data `Ctj]t
* @param l =Dz[|$dV
* @param i -1o1k-8d
*/ :b=0_<G
private void insertSort(int[] data, int start, int len) { C+k>Ajr
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Bb o*
} N3?d?+A$
} . FruI#99
} !d^`YEfE
} |j+~Td3})&
}>w; +XU
堆排序： 7[)(;-
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package org.rut.util.algorithm.support; u|ZO"t
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import org.rut.util.algorithm.SortUtil; kel {9b=i
*" )[Srbg
/** %F~ dmA#:
* @author treeroot "duJl-
* @since 2006-2-2 Nm~#$orI|
* @version 1.0 p5KNqqZZ
*/ )&9RoW()?
public class HeapSort implements SortUtil.Sort{ SS`C0&I@p
l.BNe)1!22
/* (non-Javadoc) 2R!W5gs1<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RB"rx\u7K
*/ ?]z ._I`E
public void sort(int[] data) { ]Oy<zU
MaxHeap h=new MaxHeap(); -AE/,@\P
h.init(data); 8`2K=`]ES+
for(int i=0;i h.remove(); iCS/~[
System.arraycopy(h.queue,1,data,0,data.length); !xI![N^
} DkIFvsLK
9E^piLA
private static class MaxHeap{ Ba6xkEd
UU/|s>F
void init(int[] data){ g6V*wjC
this.queue=new int[data.length+1]; <G>PPf}
for(int i=0;i queue[++size]=data; N[-)c,O
fixUp(size); Fo#*_y5\
} b~gF,^w
} LPO" K"'w
S\A[Z&k0
private int size=0; hd~rC*I
rx/6x(3
private int[] queue; ;qMlGXW*q
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public int get() { wLbngO=VG
return queue[1]; =Ug_1w
} .p`'^$X^
q4{tH
public void remove() { Fn,|J[sC
SortUtil.swap(queue,1,size--); ;j=1 oW
fixDown(1); -+>am?
} ui1m+
file://fixdown RHbwq]
private void fixDown(int k) { ks D1NB;9
int j; gL`SZr9
while ((j = k << 1) <= size) { 0^[6
if (j < size %26amp;%26amp; queue[j] j++; *$VurqLn
if (queue[k]>queue[j]) file://不用交换 6ZBD$1$A!
break; 7W"menw
SortUtil.swap(queue,j,k); w3>|mDA}I
k = j; vvxj{fxb)
} 4(82dmKO
} ny={V*m
private void fixUp(int k) { R 28*
while (k > 1) { Mk[`HEO
int j = k >> 1; _3a 5/IZ
if (queue[j]>queue[k]) 3iw9jhK!W
break; j&.BbcE45
SortUtil.swap(queue,j,k); 7krA+/Qr(
k = j; d}_c(
} 7w,FA
} L ]c9
S)yV51^B
} yxbTcZ
?W_U{=anl
} @g~sgE}#
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SortUtil： `'WLGQG
[<QWTMjR
package org.rut.util.algorithm; 'Aj>+H<B
99K+7G\{
import org.rut.util.algorithm.support.BubbleSort; n~j[Pw
import org.rut.util.algorithm.support.HeapSort; Sj?sw]3
import org.rut.util.algorithm.support.ImprovedMergeSort; R:?vY!
import org.rut.util.algorithm.support.ImprovedQuickSort; `x)bw
import org.rut.util.algorithm.support.InsertSort; U.OX*-Cd
import org.rut.util.algorithm.support.MergeSort; +`-a*U94
import org.rut.util.algorithm.support.QuickSort; /MH@>C _
import org.rut.util.algorithm.support.SelectionSort; Z"X*FzFo
import org.rut.util.algorithm.support.ShellSort; xQap44KPZ
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/** 0h4}RmS
* @author treeroot ^<0NIu}
* @since 2006-2-2 QaR.8/xV
* @version 1.0 NCt sx /C
*/ Xf9%A2 iB
public class SortUtil { RCXSz
public final static int INSERT = 1; bq-\'h f<
public final static int BUBBLE = 2; :* b4/qpYv
public final static int SELECTION = 3; =fK'Ep[
public final static int SHELL = 4; (L%q/$
public final static int QUICK = 5; u V7Hsg9l
public final static int IMPROVED_QUICK = 6; tYZGf xj
public final static int MERGE = 7; <9a_wGs
public final static int IMPROVED_MERGE = 8; /g'-*:a
public final static int HEAP = 9; <z2mNq
F*VMS
public static void sort(int[] data) { vp-7>Wj
sort(data, IMPROVED_QUICK); TZNgtR{q
} N'P,QiR,z<
private static String[] name={ .+}o'rU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [nIG_j>D-f
}; 9X9zIh]JV
L]N2rMM
private static Sort[] impl=new Sort[]{ 5l0rw)
new InsertSort(), O7'3}P;
new BubbleSort(), 2EwWV0BS
new SelectionSort(), gecT*^
new ShellSort(), -Jo :+].
new QuickSort(), Cnci%eo
new ImprovedQuickSort(), A5<Z&Y[
new MergeSort(), iLcadX
new ImprovedMergeSort(), {))S<_yN
new HeapSort() ZM`P~N1?)g
}; a9zph2o-
x9A ZS#e)[
public static String toString(int algorithm){ T,2Dr;
return name[algorithm-1]; 2%C5P0;QX
} 7u5\#|yL
u%T$XG
public static void sort(int[] data, int algorithm) { %yM' Z[-
impl[algorithm-1].sort(data); r5fkt>HZ
} 3H#/u! W
#r)1<}_e#
public static interface Sort { p]z54 ~
public void sort(int[] data); &d3'{~:
} I@Z*Nu1L
np\2sa`
public static void swap(int[] data, int i, int j) { *M<BPxh0w]
int temp = data; wx%nTf/Oa
data = data[j]; ^@lg5d3F
data[j] = temp; m:fouMS
} 124L3AG
} tr9Y1vxo{