[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; g](m& O
} #GWQ]r?
int i1=l; *D4H;P#
int i2=mid+1; >4h4t/G
for(int cur=l;cur<=r;cur++){ `kekc.*-[@
if(i1==mid+1) Sn0?_vH4
data[cur]=temp[i2++]; 8 ehC^Cg
else if(i2>r) Xk7zXah
data[cur]=temp[i1++]; zoUW}O
else if(temp[i1] data[cur]=temp[i1++]; TuaT-Z~U{
else zYls>fbp,
data[cur]=temp[i2++]; r9b`3yr=
} K''b)v X4
} azE>uEsE
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} zQ)[re)
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改进后的归并排序: 8d Ftp3(
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package org.rut.util.algorithm.support; N3x}YHFF
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import org.rut.util.algorithm.SortUtil; rWbL_1Eq
?I7H ):
/** d%]7:
* @author treeroot h[XGFz
* @since 2006-2-2 _10#rucr
* @version 1.0 J4S2vBe16
*/ 78 UT]<Q;K
public class ImprovedMergeSort implements SortUtil.Sort { J~c]9t
<D&75C#
private static final int THRESHOLD = 10; Q{$2D&
*&5G+d2
/* 8,B9y D
* (non-Javadoc) Nc;7KMOIA
* m m`:ci
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xmVK{Q YT$
*/ 8,['q~z
public void sort(int[] data) { 8|J%IE
int[] temp=new int[data.length]; }>tUkXlhJ<
mergeSort(data,temp,0,data.length-1); -Tz9J4xU&
} -nHc52,
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private void mergeSort(int[] data, int[] temp, int l, int r) { 2V~Yb1P
int i, j, k; u$a%{46
int mid = (l + r) / 2; ]?<uf40Mm
if (l == r) y<;#*wB
return; {ifYr(|p`
if ((mid - l) >= THRESHOLD) l@Ml8+
mergeSort(data, temp, l, mid); <m)@~s?D
else :!r_dmJ
insertSort(data, l, mid - l + 1); PDGh\Y[AK,
if ((r - mid) > THRESHOLD) 'etCIl3
mergeSort(data, temp, mid + 1, r); ;)clCm46
else yq&]>ox
insertSort(data, mid + 1, r - mid); ?!A{n3\<
JFZZ-t;*
for (i = l; i <= mid; i++) { e@I?ESZ5
temp = data; IHB{US1G
} gZvl D
for (j = 1; j <= r - mid; j++) { S B'.
temp[r - j + 1] = data[j + mid]; 2QBq
} X1" `0r3
int a = temp[l]; x$A5Ved
int b = temp[r]; 8E$KR:/:4
for (i = l, j = r, k = l; k <= r; k++) { A4SM@ry
if (a < b) { O #0:6QX
data[k] = temp[i++]; !5{t1 oJ
a = temp; Hi|Oeu
} else { .c BJA&/
data[k] = temp[j--]; pX2 Ki^)]
b = temp[j]; a{H~>d<?
} o3uv"# C
} 2I#fwsb
} mNuv>GAb
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/** &d6'$h:kHb
* @param data IcaF4#
* @param l ,?`$~8
* @param i .CmwR$u&
*/ .Mm8\].
private void insertSort(int[] data, int start, int len) { M6g!bK2l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N4$0ptz#}G
} M)-+j{<
} w#-rl@JQ4
} $TR[SMj
} OcIJT1
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堆排序： bup;4~g
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package org.rut.util.algorithm.support; O":x$>'t
:~`E@`/
import org.rut.util.algorithm.SortUtil; LqU]&AAh
!d"J,.)
/** 9ft7
* @author treeroot *^QfTKN
* @since 2006-2-2 g*!2.P
* @version 1.0 ,V|>nkQ
*/ pU}>}
public class HeapSort implements SortUtil.Sort{ -3bl!9h^
KuFDkT!
/* (non-Javadoc) Grkj@Q*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b-~Gt]%>m
*/ 8$@gAlI^
public void sort(int[] data) { {{giSW'
MaxHeap h=new MaxHeap(); 4Tq%V|5"&
h.init(data); )Ax1?Nx$
for(int i=0;i h.remove(); }`*]&I[P
System.arraycopy(h.queue,1,data,0,data.length); l-M~e]
} Kb{
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private static class MaxHeap{ 9[8?'`m
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void init(int[] data){ ?p6+?\H
this.queue=new int[data.length+1]; 8Zwq:lV Q
for(int i=0;i queue[++size]=data; dG6Mo76
fixUp(size); Mi:$<fEX
} [NH[n#
} ZW*"Kok
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private int size=0; +tlTHK
m"jqHGFV
private int[] queue; I~#'76L[
hOw7"'# !
public int get() { [x,_0-_
return queue[1]; aS62S9nwX
} nq A> }A
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public void remove() { +vJ[k2d
SortUtil.swap(queue,1,size--); -l$]>J~
fixDown(1); -pcYhLIn
} !3d+"tL S
file://fixdown a o\+%s
private void fixDown(int k) { x|E$ f+
int j; J/ <[irC
while ((j = k << 1) <= size) { E!jM&\Zj
if (j < size %26amp;%26amp; queue[j] j++; ?][Mv`ST
if (queue[k]>queue[j]) file://不用交换 =>/aM7]
break; v#=-
SortUtil.swap(queue,j,k); !`Bb[BTf
k = j; !.x(lOqf
} %mh K1,
} zFwp$K>{QY
private void fixUp(int k) { IO|">a6
while (k > 1) { 4,TS1H
int j = k >> 1; /GfC/)1_
if (queue[j]>queue[k]) K)F;^)KDHf
break; [;#}BlbN
SortUtil.swap(queue,j,k); _s<eqCBV
k = j; |=,V,*"
} v0\2%PC
} >qCUs3}C{*
=U3!D;XP
} k`kmmb>
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} ADlPdkmym
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SortUtil： (g4.bbEm
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package org.rut.util.algorithm; B9Y "J
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import org.rut.util.algorithm.support.BubbleSort; u;;]S!:M
import org.rut.util.algorithm.support.HeapSort; ~Ui<y=d
import org.rut.util.algorithm.support.ImprovedMergeSort; g]z,*d
import org.rut.util.algorithm.support.ImprovedQuickSort; vU&gFEWg
import org.rut.util.algorithm.support.InsertSort; TfVB~"&
import org.rut.util.algorithm.support.MergeSort; 4k<4=E
import org.rut.util.algorithm.support.QuickSort; vsHY;[
import org.rut.util.algorithm.support.SelectionSort; {i`BDOaL
import org.rut.util.algorithm.support.ShellSort; g:O~1jq
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/** j<wWPv
* @author treeroot /dhw~|
* @since 2006-2-2 q"`1cFD
* @version 1.0 8H3|^J
*/ fMI4'.Od
public class SortUtil { 5;C+K~Y
public final static int INSERT = 1; 3($%AGKJ
public final static int BUBBLE = 2; q-X)tH_+w@
public final static int SELECTION = 3; IHMZE42
public final static int SHELL = 4; Z/6B[,V
public final static int QUICK = 5; 7*~ rhQ
public final static int IMPROVED_QUICK = 6; w\8grEj
public final static int MERGE = 7; Cf J@|Rh
public final static int IMPROVED_MERGE = 8; N>'1<i?
public final static int HEAP = 9; M[@).4h
(X QgOR#
public static void sort(int[] data) { & /UcFB
sort(data, IMPROVED_QUICK); ?L+@?fVN
} a]BnHLx
private static String[] name={ D />REC^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K zKHC
}; b.Z K1
e*Sv}4e=.
private static Sort[] impl=new Sort[]{ &ZClv"6
new InsertSort(), {&,a)h7&
new BubbleSort(), !7P 1%/
new SelectionSort(), V[uB0#Lp
new ShellSort(), %}x/fq
new QuickSort(), r,!7TuBl
new ImprovedQuickSort(), B&+V%~/
new MergeSort(), OjJKloy'
new ImprovedMergeSort(), #rF|X6P
new HeapSort() rhHX0+
}; -=s7Q{O8Z
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public static String toString(int algorithm){ #4Xe zj,g*
return name[algorithm-1]; wVP{R3
} w}K<,5I>
`BdZqXKG
public static void sort(int[] data, int algorithm) { :p%nQF,*f
impl[algorithm-1].sort(data); VfAIx]Fa
} vZq7U]RW
&d[&8V5S
public static interface Sort { u&9|9+"N
public void sort(int[] data); HhH[pE
} ;vc$;54K
4%aODr8
public static void swap(int[] data, int i, int j) { K%1'zSAyK
int temp = data; 2_ <
data = data[j]; 90Jxn'>^
data[j] = temp; `LEk/b1(P
} (iIJ[{[H4)
} # G0jMQ