[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; )%I2#Q"Nt-
} 1^jGSB.%A
int i1=l; yHsmX2s
int i2=mid+1; ,3=|a|p
for(int cur=l;cur<=r;cur++){ INZsDM 9
if(i1==mid+1) A\X?Aq-^'
data[cur]=temp[i2++]; ~dg7c{o5
else if(i2>r) D6fry\
data[cur]=temp[i1++]; OrNi<TY>
else if(temp[i1] data[cur]=temp[i1++]; ~bC{R&p
else Yi1lvB?m
data[cur]=temp[i2++]; kaqH.e(
} jvv3;lWDL.
} dI};l
V.?N29CA|
} ~.;+uH<i
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改进后的归并排序: qbrY5;U
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package org.rut.util.algorithm.support; ZCVwQ#Xe+
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import org.rut.util.algorithm.SortUtil; %5Q5xw]w3
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/** =:Ahg 9
* @author treeroot d^p af
* @since 2006-2-2 %&w 8E[
* @version 1.0 845a%A$
*/ w/&)mm{
public class ImprovedMergeSort implements SortUtil.Sort { :p%G+q2
Y>W$n9d&G2
private static final int THRESHOLD = 10; 8`~M$5!
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/* P@lDhzd
* (non-Javadoc) u_ou,RF
* )IQ5Qu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bS7rG$n [
*/ >ka*-8?
public void sort(int[] data) { b|jdYJbol&
int[] temp=new int[data.length]; qRi;[`
mergeSort(data,temp,0,data.length-1); J8IdQ:4^l
} P5-1z&9O
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private void mergeSort(int[] data, int[] temp, int l, int r) { #y;TSHx/
int i, j, k; DD5S R
int mid = (l + r) / 2; X)6}<A
if (l == r) '9d<vWg
return; [Ume^
if ((mid - l) >= THRESHOLD) ML eo3
mergeSort(data, temp, l, mid); g2)jd[GM
else vz$-KT4e^
insertSort(data, l, mid - l + 1); YvA@I|..~
if ((r - mid) > THRESHOLD) k%2woHSu&
mergeSort(data, temp, mid + 1, r); l}w9c`f
else RgTm^?Ex
insertSort(data, mid + 1, r - mid); Q5Yy \M
ygI81\D
for (i = l; i <= mid; i++) { rFn%e
temp = data; Z8mSm[w
} DNTkv_S
for (j = 1; j <= r - mid; j++) { pAK7V;sJ
temp[r - j + 1] = data[j + mid]; $U. >]i
} 9rD6."G
int a = temp[l]; 3X|7 R
int b = temp[r]; XL=Y~7b
for (i = l, j = r, k = l; k <= r; k++) { f[r?J/;P9
if (a < b) { F/8="dM
data[k] = temp[i++]; I'sq0^
a = temp; `eZ +Pf".
} else { -!_\4
data[k] = temp[j--]; 1=o|[7
b = temp[j]; m 0jm$>:Z
} ''.P=
} Q#gzk%jL@
} CB!5>k+mC
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/** AlPk o($E*
* @param data MZPXI{G
* @param l ?so=k&I-M
* @param i l rRRRR
*/ g<b(q|
private void insertSort(int[] data, int start, int len) { [-Xz:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Uw`YlUT\
} J)kH$!csi
} yLFZo"r
} $RASpM
} Nj5V" c
X6h@K</c^:
堆排序： s*XE
UYw_k\
package org.rut.util.algorithm.support; $~^Y4 } m
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import org.rut.util.algorithm.SortUtil; k 'CM^,F&
P }BU7`8
/** fC4#b?Q
* @author treeroot }^b7x;O|
* @since 2006-2-2 h eR$j
* @version 1.0 |M;tAG$,"y
*/ 6x]x>:8
public class HeapSort implements SortUtil.Sort{ An.Qi=Cv
V?[dg^*0
/* (non-Javadoc) r:.ydr@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EdH;P\c
*/ PQ0l<]Y
public void sort(int[] data) { ,V`zW<8
MaxHeap h=new MaxHeap(); [<0\v<{`L
h.init(data); \N|ma P
for(int i=0;i h.remove(); #.j[iN :+
System.arraycopy(h.queue,1,data,0,data.length); JXhHitUD
} (7zdbJX
K-<kp!v
private static class MaxHeap{ ^Fop/\E
o)B`K."
void init(int[] data){ v,eTDgw
this.queue=new int[data.length+1]; jsp)e=
for(int i=0;i queue[++size]=data; 7RpAsLH=
fixUp(size); 'B"A*!"b
} &x mYpQ
} AiDV4lHr
=cP7"\
private int size=0; BH;7CK=7R
~ZxFL$<'3
private int[] queue; )8,)&F
vG2&qjY1
public int get() { :c?}~a~JO(
return queue[1]; ^7p>p8
} g!![%*' b
S.)+C2g,@
public void remove() { =Rw-@*#l
SortUtil.swap(queue,1,size--); s/+k[9l2
fixDown(1); PV(TDb:0
} q@+#CUa&n
file://fixdown $~G=Hcl9
private void fixDown(int k) { _yH=w'8.
int j; rzk-_AFR
while ((j = k << 1) <= size) { {y\5 9
if (j < size %26amp;%26amp; queue[j] j++; _=g;K+%fb
if (queue[k]>queue[j]) file://不用交换 yG/_k!{9
break; =QG0:z)K<v
SortUtil.swap(queue,j,k); {=Y3[
k = j; 'P`L?/_3
} wI{ED
} KD(}-zUs
private void fixUp(int k) { <\6<-x(H5
while (k > 1) { .29y3}[PO
int j = k >> 1; tR{@NFUcu
if (queue[j]>queue[k]) =7l'3z8
break; {E3329t|'
SortUtil.swap(queue,j,k); lYq/ n&@_1
k = j; lk[BS*
} %uUQBZ4
} s9\HjK*+
jb'AOs
} No(p:Snbo
q33Z.3R
} $Y3mO~
#ouE,<
SortUtil： cy%S5Rz
}b$W+/M\
package org.rut.util.algorithm; nyRQ/.3
2cu?2_,
import org.rut.util.algorithm.support.BubbleSort; H}f}Y8J{
import org.rut.util.algorithm.support.HeapSort; kCVO!@yZz
import org.rut.util.algorithm.support.ImprovedMergeSort; I<}<!.Bc!
import org.rut.util.algorithm.support.ImprovedQuickSort; ?E2$
import org.rut.util.algorithm.support.InsertSort; h+"UK=
import org.rut.util.algorithm.support.MergeSort; c&]nAn(
import org.rut.util.algorithm.support.QuickSort; &}."sGK
import org.rut.util.algorithm.support.SelectionSort; EZw<)Q
import org.rut.util.algorithm.support.ShellSort; [(d))(M$|
PSR21;
/** B{dR/q3;@
* @author treeroot fEgwQ-]
* @since 2006-2-2 c:OFBVZ
* @version 1.0 cZFG~n/
*/ s<hl>vY_'
public class SortUtil { =VFPZ
public final static int INSERT = 1; ~MZEAY9
public final static int BUBBLE = 2; *$6dNx
public final static int SELECTION = 3; wBaIN]Y,
public final static int SHELL = 4; D>>?8a
public final static int QUICK = 5; rd\:.
public final static int IMPROVED_QUICK = 6; ji] H|
public final static int MERGE = 7; &X`zk
public final static int IMPROVED_MERGE = 8; [>#@?@x`P
public final static int HEAP = 9; rq]zt2
#l<un<
public static void sort(int[] data) { 9irT}e
sort(data, IMPROVED_QUICK); %j7HIxZh
} jVxX! V
private static String[] name={ 9% wVE]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NKX62 ZC
}; *l9Wj$vja
ZPO+ #,
private static Sort[] impl=new Sort[]{ $eQf5)5
new InsertSort(), ynQ+yW74Z
new BubbleSort(), 83[gV@LW0m
new SelectionSort(), :@=;WB*0
new ShellSort(), ijuIf9!
new QuickSort(), u}~jNV
new ImprovedQuickSort(), |9&bkojo
new MergeSort(), ]A%S&q
new ImprovedMergeSort(), +"8-)'
new HeapSort() OMM5p=2Q
}; >$ok3-tuU
a*GiLq
public static String toString(int algorithm){ )h>H}wDs
return name[algorithm-1]; ~;ZT<eCIA
} QswbIP/>:'
Lo-\;%y
public static void sort(int[] data, int algorithm) { iFBH;O_~
impl[algorithm-1].sort(data); /'<Qk'
} S9@2-Oc
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public static interface Sort { !L|PDGD
public void sort(int[] data); <^v-y)%N:A
} Hp}dm93T
NBaXfWh
public static void swap(int[] data, int i, int j) { 7sglqf>
int temp = data; {S*:pG:+q
data = data[j]; X`' @G
data[j] = temp; C(jUM!m
} 7!kbe2/]'
} t,4'\nv*