[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; ]y>)es1
} -Mx"ox
int i1=l; +pZ, RW.D
int i2=mid+1; q{HfT d
for(int cur=l;cur<=r;cur++){ s9>f5u?dK
if(i1==mid+1) Q0i.gEwe
data[cur]=temp[i2++]; iY1%"x
else if(i2>r) H'Bor\;[>
data[cur]=temp[i1++]; Ol1[o
else if(temp[i1] data[cur]=temp[i1++]; fpJM)HU
else vyP3]+n
data[cur]=temp[i2++]; 1P:r=Rt/
} AC@WhL
} o7)<pfif
obKWnet
} 9bRlSb@
U:ggZ`.
改进后的归并排序: (=}cc
Mo\LFxx>4{
package org.rut.util.algorithm.support; :p0|4g
:'9%~q.D4
import org.rut.util.algorithm.SortUtil; aN?{MA\
~CgKU8
/** {L5!_]6
* @author treeroot hqIYo .<
* @since 2006-2-2 N=^{FZ
* @version 1.0 r63_|~JVB<
*/ `mXbF
public class ImprovedMergeSort implements SortUtil.Sort { [`nY/g:
")'o5V
private static final int THRESHOLD = 10; YhYcqE8
17AJT
/* Dj}n!M`2I
* (non-Javadoc) mr dG-t(k
* +b"RZ:tKp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r|wB& PGW
*/ Q?-HU,RBO
public void sort(int[] data) { y|f`sBMM
int[] temp=new int[data.length]; aG.j0`)%
mergeSort(data,temp,0,data.length-1); 7p%W)=v
} qq"&Bc>
S=H<5*]g
private void mergeSort(int[] data, int[] temp, int l, int r) { ++n"` ]o,
int i, j, k; g+;)?N*j
int mid = (l + r) / 2; ,#3u.=IR[
if (l == r) {WQH
return; 20750G
if ((mid - l) >= THRESHOLD) Oa~|a7`o
mergeSort(data, temp, l, mid); F(c~D0
else ~V&4<=r`
insertSort(data, l, mid - l + 1); gpW3zDJ
if ((r - mid) > THRESHOLD) JRt^YX
mergeSort(data, temp, mid + 1, r); Pw i6Ly`
else q"xIW0Pc
insertSort(data, mid + 1, r - mid); c`}-i6
y`O !,kW
for (i = l; i <= mid; i++) { P=PcO>
temp = data; wQbN5*82
} 2g5Ft
for (j = 1; j <= r - mid; j++) { ^HYmi\`
temp[r - j + 1] = data[j + mid]; UQ6UZd37
} tZ,vt7
int a = temp[l]; u3)Oj7cX
int b = temp[r]; ],CJSA!5F
for (i = l, j = r, k = l; k <= r; k++) { #U45;idp
if (a < b) { 'zCJK~x`x
data[k] = temp[i++]; r2A%.bL#
a = temp; ,CqJ((
} else { 37GJ}%Qs
data[k] = temp[j--]; EN6a? }5
b = temp[j]; np3$bqm
} g&9E>wT
} ;/+VHZP;
} e+jp03m\W
09z%y[z
/** 7|4hs:4mD
* @param data !R*%F
* @param l i(R&Q;{E^
* @param i q] g'rO'
*/ vJ5`:4n"
private void insertSort(int[] data, int start, int len) { w#.Tp-AZ;\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \pI)tnu6'U
} AffVah2o:
} %zj;~W;qPH
} 2,,zN-9mt
} 9Fb|B
fFP>$
堆排序： T \%{zz_(
s`"o-w\$>
package org.rut.util.algorithm.support; [DrG;k?
Ei!t#'*D<
import org.rut.util.algorithm.SortUtil; vzD3_ ?D
Q`mw2$zv
/** 3C'`c=
* @author treeroot /3|uU
* @since 2006-2-2 '5xf?0@s.
* @version 1.0 ;%"YA
*/ c@u)m}V
public class HeapSort implements SortUtil.Sort{ `H+~LVH
_22;hnG<iy
/* (non-Javadoc) me]O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z-(#}(HD
*/ ,Q|[Yr
public void sort(int[] data) { H|8vW
MaxHeap h=new MaxHeap(); KV1zx(WI
h.init(data); ly`p)6#R=
for(int i=0;i h.remove(); C =fs[
System.arraycopy(h.queue,1,data,0,data.length); Y4*ezt:;Q
} +g36,!q
'Okitq+O
private static class MaxHeap{ ! K? o H
9>~UqP9
void init(int[] data){ hKq <e%oVH
this.queue=new int[data.length+1]; W\09hZ6
for(int i=0;i queue[++size]=data; Ju5<wjQR\
fixUp(size); e='bc7$
} lK;/97Ze
} BLxtS
gQy{OU
private int size=0; x`N_tWZ
""`>v`\
private int[] queue; e*5TZ7.
QuFcc}{<]
public int get() { w)I!q&`Y
return queue[1]; =6j4_+5mnH
} LL,&!KW[S
s8w7/*<d
public void remove() { -:9E+b
SortUtil.swap(queue,1,size--); @ yJ/!9?^
fixDown(1); fdr.'aMf%
} #PYTFB%
file://fixdown G<.p".o4
private void fixDown(int k) { :ie7HF
int j; n99>oh
while ((j = k << 1) <= size) { ',-4o-
if (j < size %26amp;%26amp; queue[j] j++; fuJ6 fmT
if (queue[k]>queue[j]) file://不用交换 $Yfm>4
break; EoLF7j<W
SortUtil.swap(queue,j,k); lhZWL}l
k = j; 1B~H*=t4h
} [ bv>(a_,
} oQJK}9QR
private void fixUp(int k) { 9vc3&r
while (k > 1) { arf`%9M
int j = k >> 1; {E!"^^0`
if (queue[j]>queue[k]) 1M&n=s _
break; $LUNA.
SortUtil.swap(queue,j,k); h>B>t/k?
k = j; 2^ 'X
} ;OW`(jC
} FG8genCH@
4xLU15C
} 3\eb:-B:@
iN%\wkx*N
} x#yL&+'?Mj
]9z{ 95
SortUtil： ;c73:'e
f:L%th
package org.rut.util.algorithm; uiq)?XUKv
i|u3Qt5
import org.rut.util.algorithm.support.BubbleSort; .v[8ie
import org.rut.util.algorithm.support.HeapSort; Te?UQX7Z}M
import org.rut.util.algorithm.support.ImprovedMergeSort; b;\qF&T
import org.rut.util.algorithm.support.ImprovedQuickSort; eK\ O>
import org.rut.util.algorithm.support.InsertSort; Ikiv+Fq(
import org.rut.util.algorithm.support.MergeSort; k>#,1GbNZy
import org.rut.util.algorithm.support.QuickSort; ,lm.~%}P*
import org.rut.util.algorithm.support.SelectionSort; CFD& -tED&
import org.rut.util.algorithm.support.ShellSort; $?p^ m`t_
N>;"r]Rl"
/** $x;wnXXXM
* @author treeroot _$/(l4\T[
* @since 2006-2-2 W&`_cGoP
* @version 1.0 JBQ,rX_Hw
*/ R{S{N2+p(
public class SortUtil { M@@"-dy
public final static int INSERT = 1; bG nBV7b
public final static int BUBBLE = 2; =g'7 xA
public final static int SELECTION = 3; Mj5=t:MI
public final static int SHELL = 4; YBQO]3f
public final static int QUICK = 5; P(fTlrb
public final static int IMPROVED_QUICK = 6; E@QsuS2&
public final static int MERGE = 7; }8 A]
public final static int IMPROVED_MERGE = 8; 88Yp0T<1
public final static int HEAP = 9; %w7J0p
cT^,[3i:c
public static void sort(int[] data) { eG26m_S=
sort(data, IMPROVED_QUICK); @V)k*h3r+
} 6TS+z7S81L
private static String[] name={ ewB&PR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %tM]|!yw
}; H@2JL.(k
SFKW"cP
private static Sort[] impl=new Sort[]{ Z[KXDQn8
new InsertSort(), B&|F9Z6D
new BubbleSort(), Sj{z
new SelectionSort(), ;<0Q<0G
new ShellSort(), bnLvJ]i)
new QuickSort(), &k(t_~m>
new ImprovedQuickSort(), [r_,BH\nu
new MergeSort(), m *8[I
new ImprovedMergeSort(), O?NAbxkp
new HeapSort() lwPK^)|}
}; I"*g-ji0
/HH5Mn*
public static String toString(int algorithm){ yNdtq\h
return name[algorithm-1]; _7.Wz7]b
} Sai_rNRWB
2;.7c+r0
public static void sort(int[] data, int algorithm) { -fVeE<[
impl[algorithm-1].sort(data); lY!`<_Am
} l/;OC
> taT;[Oa
public static interface Sort { Z 2Fm=88
public void sort(int[] data); $6atr-Pb
} q5:-?|jXJ
ON _uu]=
public static void swap(int[] data, int i, int j) { P"W$ZX
int temp = data; punc'~
data = data[j]; |{cdXbr
data[j] = temp; /ow/)\/}
} |//cA2@.
} <I'kJ{"