[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; &*JU N}86
} &Rp/y%9
int i1=l; )ZQ>h{}D
int i2=mid+1; X1C &;5
for(int cur=l;cur<=r;cur++){ ]_EJ "'x
if(i1==mid+1) \,ko'48@
data[cur]=temp[i2++]; Q`BK R]/
else if(i2>r) mWP1mc:M(
data[cur]=temp[i1++]; '| 6ZPv&N
else if(temp[i1] data[cur]=temp[i1++]; <Rb[0E$
else &<>NP?j}
data[cur]=temp[i2++]; Dga;GYx
} (X3}&aLF
} 11g_!X -g@
~ubcD6f
} v.q`1D1=t
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改进后的归并排序: |lG7/\A
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package org.rut.util.algorithm.support; w~%Rxdh?8W
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import org.rut.util.algorithm.SortUtil; c]+uj q
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/** w2(pgWed
* @author treeroot ^Mmsja5K
* @since 2006-2-2 unB`n'L
* @version 1.0 579<[[6~d2
*/ '~\\:37+
public class ImprovedMergeSort implements SortUtil.Sort { iRIO~XVo
)7jJ3G*
private static final int THRESHOLD = 10; xCYK"v6\
=A]*r9
/* sd,KB+)
* (non-Javadoc) ;xQNa}"V
* >>b <)?3Rv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c.eUlr_{
*/ Py~1xf/
public void sort(int[] data) { 5kx-s6`!
int[] temp=new int[data.length]; b9Mp@I7Q-
mergeSort(data,temp,0,data.length-1); r^v1_u,1I
} crbph.0
N!~5S`
private void mergeSort(int[] data, int[] temp, int l, int r) { %nV6#pr
int i, j, k; 1$#1
int mid = (l + r) / 2; n|N?[)^k
if (l == r) o FS2*u
return; oB$c-!&
if ((mid - l) >= THRESHOLD) L:_GpZ_
mergeSort(data, temp, l, mid); )jPIBzMys
else : =f!>_r+
insertSort(data, l, mid - l + 1); i1 >oRT{Z
if ((r - mid) > THRESHOLD) m|]:oT`M
mergeSort(data, temp, mid + 1, r); Ju@8_ ?8=
else A:4?Jd>
insertSort(data, mid + 1, r - mid); [aF"5G
%5ovW<E:
for (i = l; i <= mid; i++) { WS6;ad;|
temp = data; BS|$-i5L
} HDYWDp
for (j = 1; j <= r - mid; j++) { $z[@DB[
temp[r - j + 1] = data[j + mid]; ;u*I#)7
} %:!ILN
int a = temp[l]; <;lwvO
int b = temp[r]; ey@{Ng#
for (i = l, j = r, k = l; k <= r; k++) { TFG0~"4Cz
if (a < b) { `V2doV)
data[k] = temp[i++]; HJ+Q7)
a = temp; v83@J~
} else { dJF3]h Y
data[k] = temp[j--]; GCj[ySCD
b = temp[j]; FI"KJk'
} M3VTzwuf^S
} `>Ms7G9S~e
} -xVZm8y
tNG[|Bi#
/** BIXbdo5F
* @param data nt_FqUJ
* @param l W+I""I*mV
* @param i bk|?>yd
*/ !<vy!pXg
private void insertSort(int[] data, int start, int len) { /d*[za'0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p5aqlYb6r
} nIWY<Z"
} Vtv~jJ{m
} ]YrgkC35
} 9T_fq56Oh6
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堆排序： Pm"nwm
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package org.rut.util.algorithm.support; T,9pd;k
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import org.rut.util.algorithm.SortUtil; B8~bx%)3T
zyB>peAp6j
/** INEE 37%
* @author treeroot pnTz.)'46
* @since 2006-2-2 fXSuJ<G
* @version 1.0 u&Yd+');
*/ "$.B@[iY@
public class HeapSort implements SortUtil.Sort{ [0!*<%BgK'
_`lPLBr6
/* (non-Javadoc) TF?~vS%@P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "0Z5cQjg
*/ Zg9VkL6Z6
public void sort(int[] data) { CT/>x3o
MaxHeap h=new MaxHeap(); fRjp(m
h.init(data); AO,^v+$
for(int i=0;i h.remove(); vty:@?3\
System.arraycopy(h.queue,1,data,0,data.length); .cz7jD
} wpD}#LRfm
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private static class MaxHeap{ x^Zm:Jrw~
48_( 'z*>
void init(int[] data){ }.D adV
this.queue=new int[data.length+1]; x~ID[
for(int i=0;i queue[++size]=data; AquO#A[,#
fixUp(size); f\?1oMO\
} bO*hmDt
} n?QglN
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private int size=0; aF[#(PF
Sqx'nXgO
private int[] queue; Te`MIR
7- |N&u
public int get() { LRR)T: e}q
return queue[1]; kP1cwmZ7F
} ( 6ucA
|-TxX:O-
public void remove() { |S]T,`7u
SortUtil.swap(queue,1,size--); IdCE<Oj\
fixDown(1); ,n`S ,
} uR.`8s|
file://fixdown 4|UtE<<b
private void fixDown(int k) { &\ K
int j; }L @~!=q*
while ((j = k << 1) <= size) { Oq:$GME
if (j < size %26amp;%26amp; queue[j] j++; h0C>z2iH
if (queue[k]>queue[j]) file://不用交换 +R_s(2vz
break; _zkTx7H
SortUtil.swap(queue,j,k); *xN?5u%
k = j; +F~B"a
} :kC*<f\
} NU"L1dK @
private void fixUp(int k) { 4n*`%V
while (k > 1) { U|b)Bw<P
int j = k >> 1; ZAgtVbO7
if (queue[j]>queue[k]) >`<qa!9
break; o7^0Lo5Z?
SortUtil.swap(queue,j,k); </b_Rar
k = j; %pLqX61t=
} S263h(H
} (+}44Ldt
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} U?ZWDr"*`w
E)|Bl>
} "-\8Y>E
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SortUtil： @k\,XV`T~t
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package org.rut.util.algorithm; ^a$L9p(
Z*IW*f&0>1
import org.rut.util.algorithm.support.BubbleSort; a`zHx3Yg
import org.rut.util.algorithm.support.HeapSort; %r&36d'
import org.rut.util.algorithm.support.ImprovedMergeSort; 39d$B'"<1
import org.rut.util.algorithm.support.ImprovedQuickSort; 6n;? :./
import org.rut.util.algorithm.support.InsertSort; 4%4Yqx )
import org.rut.util.algorithm.support.MergeSort; nW`] =
import org.rut.util.algorithm.support.QuickSort; ^V7)V)Z;0
import org.rut.util.algorithm.support.SelectionSort; |pBvy1e4)
import org.rut.util.algorithm.support.ShellSort; t^2$ent
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/** wxN&k$`a
* @author treeroot S4rm K&
* @since 2006-2-2 DQ&\k'"\
* @version 1.0 Oc-ia)v1G
*/ T-]UAN"O
public class SortUtil { )P,pW?h$
public final static int INSERT = 1; cM\BEhh
public final static int BUBBLE = 2; mex@~VK
public final static int SELECTION = 3; P.jy7:dB,
public final static int SHELL = 4; %/BBl$~ji
public final static int QUICK = 5; WO6+r?0M2
public final static int IMPROVED_QUICK = 6; b;nqhO[f}
public final static int MERGE = 7; P76gJ@#m
public final static int IMPROVED_MERGE = 8; <sX_hIA^Fx
public final static int HEAP = 9; yZ]?-7
[[xnp;-;
public static void sort(int[] data) { g?K? Fn.}
sort(data, IMPROVED_QUICK); a-AA$U9hj
} *$3p3-
private static String[] name={ $M~`)UeV_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F"QJ)F
}; ;,7m
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private static Sort[] impl=new Sort[]{ c~}FYO$
new InsertSort(), BqM[{Kv
new BubbleSort(), =dmxE*C
new SelectionSort(), @H^\PH?pp
new ShellSort(), x=X&b%09
new QuickSort(), r?dkE=B
new ImprovedQuickSort(), bR$5G
new MergeSort(), J% ZM V
new ImprovedMergeSort(), F5OQM?J
new HeapSort() L0w2qF
}; 4G hg~0
L">m2/ HG
public static String toString(int algorithm){ c._!dq&#R
return name[algorithm-1]; j,Qb'|f5
} M:L-j{?y_
v- p8~u1N
public static void sort(int[] data, int algorithm) { >FJK$>[1:p
impl[algorithm-1].sort(data); Y![8-L|Q
} n57mh5mixM
ad9u;uS
public static interface Sort { =LEzcq>XO
public void sort(int[] data); ;bL?uL
} s.XxYXR\
~}SQLYy7Z
public static void swap(int[] data, int i, int j) { >GzH_]
int temp = data; T'9M
data = data[j]; !1@oZ(
data[j] = temp; c(Fo-4K
} lE!.$L*k
} OAEa+V