[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; C4 Wdt
} 3Vw%[+lY9
int i1=l; J1R%w{
int i2=mid+1; &-b=gnT
for(int cur=l;cur<=r;cur++){ -|)[s[T~m
if(i1==mid+1) (6h7'r $
data[cur]=temp[i2++]; JyB>,t)
else if(i2>r) bLV@Ts
data[cur]=temp[i1++]; 4uftx1o
else if(temp[i1] data[cur]=temp[i1++]; t&P5Zw*B
else _)_XO92~
data[cur]=temp[i2++]; l?FNYvL
} C>K/C!5?
} s}z,{Y$-t
X!2|_
} <BU|?T6~
'h= >ej*
改进后的归并排序: q!ZmF1sU
]#:xl}'LS
package org.rut.util.algorithm.support; HJcZ~5jf
>8JvnBFx=
import org.rut.util.algorithm.SortUtil; Bp/8 >EO`
GzB%vsv95
/** "V^jAPDXb
* @author treeroot %[Ds-my2
* @since 2006-2-2 X^.r@tT
* @version 1.0 s lI)"+6
*/ &pba~X.u
public class ImprovedMergeSort implements SortUtil.Sort { rSJ}qRXwU
=VY4y]V
private static final int THRESHOLD = 10; {VNeh
,3n}*"K
/* ffB]4
* (non-Javadoc) xK y<o
* A&M/W'$s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >u/yp[Ky
*/ (w^&NU'e
public void sort(int[] data) { `q@~78`
int[] temp=new int[data.length]; EV(/@kN2
mergeSort(data,temp,0,data.length-1); A!Yqj~
} eoL)gIM%
ttKfZ0
private void mergeSort(int[] data, int[] temp, int l, int r) { b,`\"'1
int i, j, k; nWl0R=
int mid = (l + r) / 2; $U0(%lIU
if (l == r) MnS"M[y3
return; (,TO|
if ((mid - l) >= THRESHOLD) f7W=x6Z4
mergeSort(data, temp, l, mid); C`#N Q*O
else .^NV e40O
insertSort(data, l, mid - l + 1); (\I =v".
if ((r - mid) > THRESHOLD) }I10hy~W
mergeSort(data, temp, mid + 1, r); qB:`tHy
else tQ|I$5jNJ
insertSort(data, mid + 1, r - mid); Y~:7l5C
kL3=7t^ 1
for (i = l; i <= mid; i++) { & vIKNGJ^
temp = data; a,E;R$[!
} MmK\|CtV
for (j = 1; j <= r - mid; j++) { $-0u`=!
temp[r - j + 1] = data[j + mid]; %51pfuL
} >I!(CM":s$
int a = temp[l]; zc{C+:3$^
int b = temp[r]; "D/ fB%h`
for (i = l, j = r, k = l; k <= r; k++) { 8`~]9ej
if (a < b) { Tc*PDt0C
data[k] = temp[i++]; W6iIL:sp
a = temp; GkC88l9z
} else { S-H3UND"
data[k] = temp[j--]; W!(Q_B
b = temp[j]; Xm-63U`w5
} zKutx6=aj
} ={Hbx>p
} Sce9R?II
Zk[#BUA
/** 5jLDe~
* @param data t(yv
* @param l #n7{ 3)
* @param i \[&]kPcDl
*/ ')aYkO{%sb
private void insertSort(int[] data, int start, int len) { X<{m;T `
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &Xav$6+Z1J
} Ll`apKr
} $d=lDN
} r=`>'3 } x
} # 9t/j`{
@e7+d@O<
堆排序： 3IkG*enI
!:8!\gE^P
package org.rut.util.algorithm.support; 21[F%,{.),
IW#(ICeb
import org.rut.util.algorithm.SortUtil; #n"/9%35f`
?xet:#R'
/** Txh;r.1e
* @author treeroot O+N-x8W{
* @since 2006-2-2 <gy'@w?
* @version 1.0 0d2%CsMS"D
*/ tFQFpbI
public class HeapSort implements SortUtil.Sort{ $3ILVT
4HJrR^
/* (non-Javadoc) Qi61(lK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3C2>
*/ &M!:,B
public void sort(int[] data) { "mf;k^sqS
MaxHeap h=new MaxHeap(); Xy{+=UY
h.init(data); uE$o4X
for(int i=0;i h.remove(); On^#x]
System.arraycopy(h.queue,1,data,0,data.length); 8{YxUD
} V("1\
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private static class MaxHeap{ D/WS
{JgN^R<5<f
void init(int[] data){ p"@|2a
this.queue=new int[data.length+1]; X`b5h}c
for(int i=0;i queue[++size]=data; [oj"Tn(
fixUp(size); SXEiyy[7v
} ht|r+v-
} n3N"Ax
YUE[eD/
private int size=0; qo;\dp1
8(}sZ)6
private int[] queue; *`#,^p`j b
TRZ^$<AG
public int get() { vF&b|V+,
return queue[1]; Nz;;X\GI
} |@BN+o;`Om
UVK"%kW#(
public void remove() { pA'A<|)K0
SortUtil.swap(queue,1,size--); 4_<Uk
fixDown(1); * 5n:+Tw(
} 8=~>B@'
file://fixdown ShpnFuH
private void fixDown(int k) { lI 1lP 1
int j; lNb\^b
while ((j = k << 1) <= size) { ={^#E?
if (j < size %26amp;%26amp; queue[j] j++; oK6lCGM5
if (queue[k]>queue[j]) file://不用交换 tOw 0(-:iq
break; )a\h5nQI)
SortUtil.swap(queue,j,k); Kxn7sL$]=F
k = j; o3=kF
} u$#7W>R
} 1RA$hW@}
private void fixUp(int k) { )^TQedF
while (k > 1) { s/M~RB!w
int j = k >> 1; J~q+G
if (queue[j]>queue[k]) dI-5%Um
break; ydQS"]\g
SortUtil.swap(queue,j,k); 16|S 0 )
k = j; __j8jEV
} nY)Pxahm7
} `Tj}4f
3;NRW+
} 7VcVI? ?
n^N]iw{G
} M-N2>i#
ozLJ#eOE9
SortUtil： "N]o5d
wVDB?gy%#
package org.rut.util.algorithm; : qRT9n$
P~e$iBH'
import org.rut.util.algorithm.support.BubbleSort; dU6LB+A
import org.rut.util.algorithm.support.HeapSort; rzDJH:W{2
import org.rut.util.algorithm.support.ImprovedMergeSort; 4&e@>
import org.rut.util.algorithm.support.ImprovedQuickSort; ?LI9F7n
import org.rut.util.algorithm.support.InsertSort; p8l#=]\;
import org.rut.util.algorithm.support.MergeSort; L?x?+HPY.
import org.rut.util.algorithm.support.QuickSort; Z@!W?Ed
import org.rut.util.algorithm.support.SelectionSort; I&8m5F?$`
import org.rut.util.algorithm.support.ShellSort; I})t
s2~dmZ_B|_
/** *GP_ut%
* @author treeroot GDp p`'\
* @since 2006-2-2 !T#y r)
* @version 1.0 "Q{~Bj~
*/ 'V#ew\
public class SortUtil { N?0y<S ?!
public final static int INSERT = 1; C+XZDY(=Z
public final static int BUBBLE = 2; 4rG 7\
public final static int SELECTION = 3; .To:tN#
public final static int SHELL = 4; <C;>$kX
public final static int QUICK = 5; sdYj'e:N
public final static int IMPROVED_QUICK = 6; e oSM@Isu
public final static int MERGE = 7; |SKG4_wGe
public final static int IMPROVED_MERGE = 8; z\>X[yNpA
public final static int HEAP = 9; x9l0UD*+g
mo[<4Uks
public static void sort(int[] data) { 2F@)nh
sort(data, IMPROVED_QUICK); xc.D!Iav
} 9ox|.68q
private static String[] name={ Wxau]uix
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [P=[hj;
}; o!`O i5
><Z3<7K9
private static Sort[] impl=new Sort[]{ {@__%=`CCS
new InsertSort(), K#hYbDm
new BubbleSort(), qO{ ZZ*
new SelectionSort(), 2,V+?'^j
new ShellSort(), PMhhPw]
new QuickSort(), 1Dp@n
new ImprovedQuickSort(), _G #"B{7
new MergeSort(), ;+34g6
new ImprovedMergeSort(), ^z}lGu
new HeapSort() ~49N
}; /I'u/{KB
9+ l3$
public static String toString(int algorithm){ Y{vwOs
return name[algorithm-1]; QM_X2Ho
} r/hyW6e_
cO+Xzd;838
public static void sort(int[] data, int algorithm) { V<ApHb
impl[algorithm-1].sort(data); 5}bZs` C
} D%UZ'bHN*
q|i%)V`)-
public static interface Sort { $?J+dB
public void sort(int[] data); igBrmaY'
} o 7W Kh=
4:&qTY)H
public static void swap(int[] data, int i, int j) { 5b1uD>,;y
int temp = data; rjHIQC C
data = data[j]; uk[< 6oxz
data[j] = temp; nIQ&gbfO
} Fra>|;do
} 76A>^Bs\/