[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; CS:"F) at
} |<,!K;@
int i1=l; 3NEbCILF
int i2=mid+1; 2#sJ`pdQ
for(int cur=l;cur<=r;cur++){ @O;gKFx
if(i1==mid+1) "V|1w>s
data[cur]=temp[i2++]; =Q % F~
else if(i2>r) ,S|v>i,@
data[cur]=temp[i1++]; QLq^[>n
else if(temp[i1] data[cur]=temp[i1++]; r!qr'Ht<
else &_q&TEi
data[cur]=temp[i2++]; 82w='~y
} &E@8 z&
} H /E.R[\+x
u$7od$&S
} e8HGST`
<NV[8B#k]
改进后的归并排序: ;&|MNN^
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package org.rut.util.algorithm.support; lyBae?%&
f'hrS}e
import org.rut.util.algorithm.SortUtil; /8Sg<
o%ZtE
/** Z.a`S~U
* @author treeroot PcXz4?Q$
* @since 2006-2-2 _]SV@q^
* @version 1.0 z(sfX}%
*/ +{Qk9Z
public class ImprovedMergeSort implements SortUtil.Sort { VdrqbZ
WoP5[.G
private static final int THRESHOLD = 10; OH2Xxr[bQ
]>E)0<t
/* 3)jFv7LAU
* (non-Javadoc) _#6_7=g@s6
* sdk%~RN0T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /%E X4 W
*/ F iZe4{(p
public void sort(int[] data) { (vX+ Yw
int[] temp=new int[data.length]; )<_e{_h
mergeSort(data,temp,0,data.length-1); !(:R=J_h
} ZPrL)']
D6cqON0a.
private void mergeSort(int[] data, int[] temp, int l, int r) { vrr&Ve
int i, j, k; )bJS*#
int mid = (l + r) / 2; MeD}S@H
if (l == r) X,m6#vLK2
return; dso6ZRx
if ((mid - l) >= THRESHOLD) xcBV,[E{
mergeSort(data, temp, l, mid); 84xA/BRW
else p.(8ekh
insertSort(data, l, mid - l + 1); &e2|]C4
if ((r - mid) > THRESHOLD) T#ktC0W]h
mergeSort(data, temp, mid + 1, r); HYd&.*41rE
else oMM+af
insertSort(data, mid + 1, r - mid); |y,%dFNLf
zcF`Z{&+
for (i = l; i <= mid; i++) { O=2"t%Gc
temp = data; 74Fv9
} N~c Y~a
for (j = 1; j <= r - mid; j++) { !Ee#jCXS
temp[r - j + 1] = data[j + mid]; : ,0F_["3
} in>Os@e#
int a = temp[l]; >A'Q9Tia;
int b = temp[r]; *>m,7} L
for (i = l, j = r, k = l; k <= r; k++) { ;,d^=:S6@
if (a < b) { 6N7^`ghTf
data[k] = temp[i++]; qnFi./
a = temp; "x;|li3;
} else { ]/G~ L
data[k] = temp[j--]; T7F)'Mx<
b = temp[j]; 5somoV B
} :Nry |
} 2P&KU%D)0s
} adi^*7Q] )
ssf.ef$
/** <a=,{O
* @param data uT")j,tz
* @param l rn$LZE %
* @param i ],!7S"{97
*/ -w>2!@8
private void insertSort(int[] data, int start, int len) { 2u B66i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); M/!5r
} G@Jl4iHug"
} J5i$D0K[
} #CRAQ#:45(
} &:]ej6V'[
1[? xU:;9
堆排序： **RW 9FU
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package org.rut.util.algorithm.support; 8y9`xRy
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import org.rut.util.algorithm.SortUtil; e!eUgD
5eP0W#
/** be@\5
* @author treeroot [{K
* @since 2006-2-2 fo$5WTY
* @version 1.0 y2_^lW%
*/ |._9;T-Yde
public class HeapSort implements SortUtil.Sort{ l(o;O.dLt
">-mZ'$#L
/* (non-Javadoc) 4>JDo,AWy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !623;
*/ =|Q7k+b
public void sort(int[] data) { [@"7qKd1
MaxHeap h=new MaxHeap(); ~|FKl%
h.init(data); NWNPq"
for(int i=0;i h.remove(); dg(fD>+
System.arraycopy(h.queue,1,data,0,data.length); sKIpL(_I$
} YtQsSU
#3+-vyZm
private static class MaxHeap{ ^GS,4[)H
\G+uK:PC,
void init(int[] data){ 2c%*u {=:
this.queue=new int[data.length+1]; J&vmW}&
for(int i=0;i queue[++size]=data; `S&$y4|Vs
fixUp(size); _QS+{
} ,(D:cRN
} !awsQ!e|
CyWaXp65
private int size=0; Gtyy^tz[
*irYSTA$
private int[] queue; [6$n
x|TLMu=3=
public int get() { 5os(.
return queue[1]; qYwEPGa\
} ~EV7E F
GD]yP..
public void remove() { "b#L8kN
SortUtil.swap(queue,1,size--); @@])B#
fixDown(1); 5LIbHSK
} 0Ud.u
file://fixdown nw)yK%`;M
private void fixDown(int k) { R cz;|h8
int j; RV&=B%w+
while ((j = k << 1) <= size) { Ki8]+W37
if (j < size %26amp;%26amp; queue[j] j++; App9um3:
if (queue[k]>queue[j]) file://不用交换 %GY U$aA
break; YhZmyYamE
SortUtil.swap(queue,j,k); IpRdGT02
k = j; Z0(}doh
} 4dd]Ju
} 1pM"j!
private void fixUp(int k) { |KC!6<}T~9
while (k > 1) { ;1wRo`RD
int j = k >> 1; npJyVh47
if (queue[j]>queue[k]) Kc%GxD`
break; ) vKZs:
SortUtil.swap(queue,j,k); @5C!`:f
k = j; 0fpxr`
} pc=f,
} TsvF~Gdp
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} LRuB&4r8
q#mw#Uw-
} HZ+l){u
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SortUtil： H/v|H}d;
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package org.rut.util.algorithm; &rj)Oh2
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import org.rut.util.algorithm.support.BubbleSort; v'vYNh
import org.rut.util.algorithm.support.HeapSort; 1dl@2CVS
import org.rut.util.algorithm.support.ImprovedMergeSort; ?_VoO
import org.rut.util.algorithm.support.ImprovedQuickSort; j&c YRKpz
import org.rut.util.algorithm.support.InsertSort; 9CxFj)#5F
import org.rut.util.algorithm.support.MergeSort; T=kR!Gx
import org.rut.util.algorithm.support.QuickSort; OX r%b
import org.rut.util.algorithm.support.SelectionSort; zo^34wW^
import org.rut.util.algorithm.support.ShellSort; S=N3qBH6
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/** XuY#EJbZ
* @author treeroot k|SywATr
* @since 2006-2-2 Kz>Bw;R(
* @version 1.0 0?{Y6:d+
*/ Sp2<rI
public class SortUtil { T|L_+(M{
public final static int INSERT = 1; b":3J)Y6.
public final static int BUBBLE = 2; w|AHE
public final static int SELECTION = 3; ]m(C}}
public final static int SHELL = 4; )qL UHE=
public final static int QUICK = 5; \D<w:\P
public final static int IMPROVED_QUICK = 6; TGxmc37?
public final static int MERGE = 7; H E'1Wa0r
public final static int IMPROVED_MERGE = 8; Wt,t5
public final static int HEAP = 9; _?YP0GpU
U=G}@Y
public static void sort(int[] data) { xaSg'8-
sort(data, IMPROVED_QUICK); 68 *~5]
} 'Wv`^{y <^
private static String[] name={ WA$Ug
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" + bU*"5"
}; FB\lUO)U\c
z K+C&X
private static Sort[] impl=new Sort[]{ ?: XY3!{
new InsertSort(), ,+Bp>=pvs
new BubbleSort(), H/I1n\
new SelectionSort(), \H-,^[G3
new ShellSort(), f0h^ULd
new QuickSort(), 'ZUB:R@[
new ImprovedQuickSort(), bFv,.(h'
new MergeSort(), t'.oty=
new ImprovedMergeSort(), O9_S"\8]@
new HeapSort() \GFFPCi4D
}; M< 1rQW'
n-5@<y^
public static String toString(int algorithm){ yW!+:y_N_
return name[algorithm-1]; Z6F^p8O-
} |vI1C5e
(0cL! N;;
public static void sort(int[] data, int algorithm) { dPtQ Sa
impl[algorithm-1].sort(data); pp!>:%
} P\3$Y-id
rF*L@HI
public static interface Sort { 3ZhB 8 P
public void sort(int[] data); M*xt9'Yd
} r'GD
Naqz":%.
public static void swap(int[] data, int i, int j) { `Qg#`
int temp = data; `Qrrnq
data = data[j]; |*5QFp
data[j] = temp; yE80*C~d
} ':[:12y[
} GY[+HgT