[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; "f3KE=cUm
} ?ne!LDlE|
int i1=l; wO3K2I]>0
int i2=mid+1; /e4#DH
for(int cur=l;cur<=r;cur++){ ?jRyw(Q
if(i1==mid+1) ?UV^6
data[cur]=temp[i2++]; J t,7S4JL
else if(i2>r) rCFTch"
data[cur]=temp[i1++]; x:WxEw>R
else if(temp[i1] data[cur]=temp[i1++]; +jpC%o}C
else QW1d&Gb.(
data[cur]=temp[i2++]; b=j]tb,
} O.~@V(7ah
} .3*VkAs
m1(cN%DBd
} NK0hT,_
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改进后的归并排序: ?{M!syD<
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package org.rut.util.algorithm.support; a?QDf5Cq
6 w:@i_2^
import org.rut.util.algorithm.SortUtil; @C fxPA
8ncgTCH:
/** t?R=a-ZI
* @author treeroot "7tEk<x
* @since 2006-2-2 7Vxe]s
* @version 1.0 + s snCr
*/ Mb0cdK?hA
public class ImprovedMergeSort implements SortUtil.Sort { 9Ucn 6[W
MOEB{~v`;
private static final int THRESHOLD = 10; HJ,sZ4*]]
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/* ooPH [p
* (non-Javadoc) 34P5[j!h
* !^*I?9P
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <r{ )*]#l
*/ k(v8zDq*
public void sort(int[] data) { 4?a!6
int[] temp=new int[data.length]; 1@Zjv>jy[
mergeSort(data,temp,0,data.length-1); K?o}B
} Ghgo"-,#
"nK(+Z
private void mergeSort(int[] data, int[] temp, int l, int r) { `kP (2b
int i, j, k; %Pb 5PIk4
int mid = (l + r) / 2; n|oAfJUk,
if (l == r) @#%rTKD9F
return; F+@E6I'g
if ((mid - l) >= THRESHOLD) @Pc]qu
mergeSort(data, temp, l, mid); i-EFq@xl
else c=T^)~$$
insertSort(data, l, mid - l + 1); o(/(`/
if ((r - mid) > THRESHOLD) 3eg<)
mergeSort(data, temp, mid + 1, r); 3 TN?yP)
else >Rbgg1^]5
insertSort(data, mid + 1, r - mid); *YFe
r4~Bn7j2
for (i = l; i <= mid; i++) { 2\z"6
temp = data; Pe !eID8
} i7[CqObzc
for (j = 1; j <= r - mid; j++) { Q\~4J1
temp[r - j + 1] = data[j + mid]; [k9aY$baT^
} $z+iB;x
int a = temp[l]; $3!j1
int b = temp[r]; k]Y#-Q1p~
for (i = l, j = r, k = l; k <= r; k++) { `1NxS35u
if (a < b) { h !~u9
data[k] = temp[i++]; J(\"\Z
a = temp; xi=qap=S^9
} else { 4><b3r;T'
data[k] = temp[j--]; )-9G*3
b = temp[j]; :ji_dQ8k
} ~7!J/LHg
} b\%=mN
} [ed%"f
G^F4c{3c~
/** 'r%`(Z{~
* @param data ;C%D+"l1g
* @param l NBR6$n
* @param i '!!w|kd
*/ | %af}# FQ
private void insertSort(int[] data, int start, int len) { ctOC.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <GShm~XD2
} k3[ ~I'
} uKqN
} &G@*/2A
} r+;C}[E
6:B[8otQ
堆排序： {W}.z
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package org.rut.util.algorithm.support; g?M\Z";
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import org.rut.util.algorithm.SortUtil; >.PLD} zE_
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/** v|jBRKU99
* @author treeroot .F.4fk
* @since 2006-2-2 !wvP24"y
* @version 1.0 /Z>#lMg\.
*/ ReP7c3D>p
public class HeapSort implements SortUtil.Sort{ F5.Vhg
!O)Ruwy
/* (non-Javadoc) !$St=!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gyieSXz[
*/ i}RxTmG<
public void sort(int[] data) { #:z.Br`
MaxHeap h=new MaxHeap(); DI9x]CR
h.init(data); HPpKti7g
for(int i=0;i h.remove(); 0<Px2/
System.arraycopy(h.queue,1,data,0,data.length); @g""*T1:$
} v%V$@MF
^o|igyS9
private static class MaxHeap{ /bVU^vo
+"T?.,
void init(int[] data){ 6+FmYp
this.queue=new int[data.length+1]; mN_RB{g{
for(int i=0;i queue[++size]=data; ]m(Uv8/6
fixUp(size); (ui"vLk8PP
} Z KnEg2a
} eUVE8pZl
F)lDK.
private int size=0; rjQV;kX>
&~G>pvZ
private int[] queue; \x)T_]Gcm
zXvAW7
public int get() { ;-@^G 3C:
return queue[1]; lW?}jzuo
} &iL"=\#
3yDa5q{
public void remove() { [1dlV/
SortUtil.swap(queue,1,size--); 6I72;e^!
fixDown(1); 4'?kyTO~
} pb}QP
file://fixdown kfg9l?R$I<
private void fixDown(int k) { D>~z{H%\
int j; 4&r^mGs,
while ((j = k << 1) <= size) { ed2QGTgR
if (j < size %26amp;%26amp; queue[j] j++; ~DhYiOSo
if (queue[k]>queue[j]) file://不用交换 uOs 8|pj,
break; %Ox*?l _
SortUtil.swap(queue,j,k); ?A2#V(4
k = j; 5X nA.?F^
} {G/4#r 2>
} ?H0 #{!s
private void fixUp(int k) { &I:5<zK{
while (k > 1) { mE%H5&VSI
int j = k >> 1; m/JpYv~
if (queue[j]>queue[k]) EP'2'51
break; zm9>"(H
SortUtil.swap(queue,j,k); d>)*!l2,C
k = j; ,S2D/Y^>
} l^%Ez?-:s
} K]oFV
7P?z{x':T
} {b"V7vn,
GG5wiN*2S
} #<S+E7uTs
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SortUtil： nxKV7d@R
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package org.rut.util.algorithm; ]P<u^ `{*
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import org.rut.util.algorithm.support.BubbleSort; ZTVX5"#Q
import org.rut.util.algorithm.support.HeapSort; 4W*52*'F,
import org.rut.util.algorithm.support.ImprovedMergeSort; 8{8J(~
import org.rut.util.algorithm.support.ImprovedQuickSort; fl!8\4
import org.rut.util.algorithm.support.InsertSort; AwAUm 2^
import org.rut.util.algorithm.support.MergeSort; A|I7R-
import org.rut.util.algorithm.support.QuickSort; ^9%G7J:vGO
import org.rut.util.algorithm.support.SelectionSort; c-z ,}`
import org.rut.util.algorithm.support.ShellSort; G}&B{Ir
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/** kKr7c4q
* @author treeroot ']4b}F:}
* @since 2006-2-2 0+}42g|_Z
* @version 1.0 ?"N,do
*/ D/'kYoAEO
public class SortUtil { 75u/'0~5
public final static int INSERT = 1; y$Sn3_9 V
public final static int BUBBLE = 2; S4aN7.'Q
public final static int SELECTION = 3; Kp'_lKW)]q
public final static int SHELL = 4; `|Pfa
public final static int QUICK = 5; szu!*wc9
public final static int IMPROVED_QUICK = 6; __fa,kK{?
public final static int MERGE = 7; 7IB<0
public final static int IMPROVED_MERGE = 8; ;!q _+P
public final static int HEAP = 9; eRKuy l
S}f3b N
public static void sort(int[] data) { NGcd
sort(data, IMPROVED_QUICK); :hr% 6K7
} N DZ :`D
private static String[] name={ +F.{:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T"xq^h1\
}; ?{[ISk)
V9&7K65-1
private static Sort[] impl=new Sort[]{ B9^@d
new InsertSort(), YRa{6*M
new BubbleSort(), y.(Yh1
new SelectionSort(), n}/?nP\%
new ShellSort(), 'APtY;x^{
new QuickSort(), _<s[HGA`z
new ImprovedQuickSort(), &YC Z L
new MergeSort(), (8T36pt~
new ImprovedMergeSort(), tIn dve
new HeapSort() `G7LM55
}; N^</:R
5x856RQ'
public static String toString(int algorithm){ .'foS>W=t
return name[algorithm-1]; tljZE)
} <LL+\kfTZO
Sk7l&B
public static void sort(int[] data, int algorithm) { cq:<,Ke
impl[algorithm-1].sort(data); zG-pqE6
} fy9mS
j3>0oe!
public static interface Sort { KYa}k0tVAp
public void sort(int[] data); qaJ$0,]H+
} &CBW>*B
E)w6ZwV
public static void swap(int[] data, int i, int j) { 1<|\df.
int temp = data; v~E\u
data = data[j]; X!H[/b:1O
data[j] = temp; :&SvjJR
} 4`E[WE:Q
} PL"u^G`