[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; ~-vCY
} $Z)u04;&@
int i1=l; +r"}@8/\1
int i2=mid+1; QSF0?Puf
for(int cur=l;cur<=r;cur++){ rtAPkXJFM
if(i1==mid+1) >(P(!^[f
data[cur]=temp[i2++]; ~3M4F^
else if(i2>r) RYCiO,+
data[cur]=temp[i1++]; j17h_ a;
else if(temp[i1] data[cur]=temp[i1++]; vW eg1
else =cV|o]
data[cur]=temp[i2++]; Z4Q]By:/L
} %2dzx[s
} u3qxG3
`,SL\\%u
} ,*W~M&n"m
RN 4?]8
改进后的归并排序: *_I`{9~'
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package org.rut.util.algorithm.support; U)f('zD
j"6|$Ze8
import org.rut.util.algorithm.SortUtil; #b*4v&<
jC[_uG
/** [c=P)t7 V
* @author treeroot :qxWANUa
* @since 2006-2-2 s?;8h &]=
* @version 1.0 5FJLDT2Lg
*/ yfV]f LZ
public class ImprovedMergeSort implements SortUtil.Sort { roc DO8f
"9'3mmZm=?
private static final int THRESHOLD = 10; N{bg-%s10i
KE"6I
/* 8<}=f4vUj5
* (non-Javadoc) AJ6l#j-
* Kw"e4 a
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `Gv\"|Gn
*/ N9|J\;fzT
public void sort(int[] data) { .?s jr4
int[] temp=new int[data.length]; v\dQjQu8m
mergeSort(data,temp,0,data.length-1); Tk[]l7R~
} eb`3'&zV&)
&c!6e<o[p
private void mergeSort(int[] data, int[] temp, int l, int r) { W7A!QS
int i, j, k; DgcS@N
int mid = (l + r) / 2; G7CkP
if (l == r) U&6A)SW,k
return; h[qZM
if ((mid - l) >= THRESHOLD) ?7wcv$K5
mergeSort(data, temp, l, mid); k^|z.$+
else ]@Y!,bw&
insertSort(data, l, mid - l + 1); ppn 8
if ((r - mid) > THRESHOLD) <QvVPE}z
mergeSort(data, temp, mid + 1, r); >3D1:0Sg
else 67&IaDts
insertSort(data, mid + 1, r - mid); I)1ih
Mj1f;$
for (i = l; i <= mid; i++) { :(ql=+vDb4
temp = data; D$4GNeB+#
} 'z,kxra|n
for (j = 1; j <= r - mid; j++) { \5&Mg81
temp[r - j + 1] = data[j + mid]; R98YGW_ dT
} ^@8XJ[C,_
int a = temp[l]; `},:dDHI
int b = temp[r]; :k?`gm$
for (i = l, j = r, k = l; k <= r; k++) { ;UgwV/d
if (a < b) { @k;65'"Q
data[k] = temp[i++]; VD&wO'U
a = temp; @yb'h`f]
} else { M2ex 3m
data[k] = temp[j--]; f_O|
b = temp[j]; 8D`+3
} Xj+_"0 #
} iCpm^XT
} |MKR&%Na
kwUUvF7w
/** 9Br+]F_i
* @param data g7?[}?]3"p
* @param l 8K9HFT@yV
* @param i w^8Q~3|7
*/ |sr\SCx
private void insertSort(int[] data, int start, int len) { 9^g8VlQdT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); r3?8nQ$
} +|bmUm<2
} `^{G`es
} 5'f_~>1Wt
} H0inU+Ih
=7TWzUCO#
堆排序： Trh t2Iv
b+:mV7eX
package org.rut.util.algorithm.support; eCKm4l'BZ
Eh;Ia6}
import org.rut.util.algorithm.SortUtil; $:5h5Y#z
zUJXA:L9
/** wuY-f4
* @author treeroot :_i1gY)
* @since 2006-2-2 5P #._Em
* @version 1.0 T_2'=7
*/ 3(J>aQZuI
public class HeapSort implements SortUtil.Sort{ uY)4y0
7Fpa%N/WL
/* (non-Javadoc) EwG+' nlE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?MSZO]Q4+
*/ HLz<C
public void sort(int[] data) { ha|2u(4
MaxHeap h=new MaxHeap(); X~m57bj
h.init(data); :CM-I_6
for(int i=0;i h.remove(); 9$v\D3<Z
System.arraycopy(h.queue,1,data,0,data.length); *-]k([wV
} i| cA)
|%8t.Z
private static class MaxHeap{ vh"';L_*37
gYbvCs8O!
void init(int[] data){ _5n2'\] H`
this.queue=new int[data.length+1]; FEhBhv|m
for(int i=0;i queue[++size]=data; rMWvW(@@D
fixUp(size); o/,%rA4
} 74 ptd,
} 0P$19TN
XdIno}pN
private int size=0; \I i#R
m8L %!6o
private int[] queue; \4$Nx/@Q}
?~.9:93
public int get() { E l.eK9L
return queue[1]; oIOeX1$V
} B> i^w1
N%:uOX8{
public void remove() { Hh](n<Bs
SortUtil.swap(queue,1,size--); 3@eI?(N
fixDown(1); !^L}LtqHI
} sR PQr?
file://fixdown _d~GY,WTdO
private void fixDown(int k) { |:(BI5&S
int j; k(>J?\iNW
while ((j = k << 1) <= size) { PNLlJlYlP
if (j < size %26amp;%26amp; queue[j] j++; :.H@tBi*E
if (queue[k]>queue[j]) file://不用交换 YVRE9
break; _`QMEr?
SortUtil.swap(queue,j,k); jyg>'"W
k = j; gHUW1E
} .w\4Th#
} a&[[@1OY
private void fixUp(int k) { yT3K 2A
while (k > 1) { ~O./A-l
int j = k >> 1; M[b~5L+S
if (queue[j]>queue[k]) (1{OQ0N+x
break; A+Je?3/.
SortUtil.swap(queue,j,k); ocW`sE?EED
k = j; cQh{z8Bf?<
} (ce)A,;
} zXGI{P0O
Q!~1Xc0S`p
} KYccjX
/s)It
} 25, [<Ao
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SortUtil： {QK9pZB
k]& I(VQ"
package org.rut.util.algorithm; w\t
.*FlB>1jy
import org.rut.util.algorithm.support.BubbleSort; /%?bO-
import org.rut.util.algorithm.support.HeapSort; >)+U^V
import org.rut.util.algorithm.support.ImprovedMergeSort; uTbMp~cYB
import org.rut.util.algorithm.support.ImprovedQuickSort; cEJ_z(\=hr
import org.rut.util.algorithm.support.InsertSort; &n6 |L8
import org.rut.util.algorithm.support.MergeSort; Z+J~moW `
import org.rut.util.algorithm.support.QuickSort; N9)ERW2`*
import org.rut.util.algorithm.support.SelectionSort; /$vX1T
import org.rut.util.algorithm.support.ShellSort; \<%FZT_4~
@J@bD+Q+0
/** K1<l/ s
* @author treeroot N/^[c+J[E
* @since 2006-2-2 l%2B4d9"v
* @version 1.0 1d.>?^uE
*/ |@-y+vbA*
public class SortUtil { Dhg/>@tw
public final static int INSERT = 1; Eh_[8:dK
public final static int BUBBLE = 2; A]V<K[9:b
public final static int SELECTION = 3; dnPr2oI?I
public final static int SHELL = 4; E\}Q9,Z$
public final static int QUICK = 5; '?fn} V
public final static int IMPROVED_QUICK = 6; g]}]/\
public final static int MERGE = 7; v g tJ+GjN
public final static int IMPROVED_MERGE = 8; [iSLn3XXRX
public final static int HEAP = 9; x~yd/ R
+fIyeX
public static void sort(int[] data) { S 1Ji\
sort(data, IMPROVED_QUICK); 1 gRR
} .fW`/BXE
private static String[] name={ V|0UwS\n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VKrKA71Z~
}; Z3T26Uk
7xT<|3 I
private static Sort[] impl=new Sort[]{ p@znmn-
new InsertSort(), ^h|'\-d\
new BubbleSort(), n_] OYG>U
new SelectionSort(), |om3*]7
new ShellSort(), QaEXk5>e
new QuickSort(), KQqQ@D&n
new ImprovedQuickSort(), tX}Fb0y
new MergeSort(), `+@%l*TQ
new ImprovedMergeSort(), [c6_6q As
new HeapSort() }KkH7XksF
}; F{<rIR
}@A~a`9g
public static String toString(int algorithm){ .~8IW,[
return name[algorithm-1]; t!Av[K
} Vk~}^;`Y
G}~b
public static void sort(int[] data, int algorithm) { d{GXFT;0
impl[algorithm-1].sort(data); WI'csM;M#
} 4]8PF
z#*GPA8Em:
public static interface Sort { CUw 9aH
public void sort(int[] data); 1r w>gR
} qOa-@MN
oq<#
public static void swap(int[] data, int i, int j) { Bp6Evi
int temp = data; WCWBvw4&"{
data = data[j]; _H3cqD
data[j] = temp; N4mQN90t
} aH$*Ue@Q
} DwTZ<H4