[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; @exey
} gJN0!N'
int i1=l; {^)70Vz>PE
int i2=mid+1; Pn.bVV:
for(int cur=l;cur<=r;cur++){ K+\nC)oG
if(i1==mid+1) AEirj /
data[cur]=temp[i2++]; "d/s5sP|S
else if(i2>r) jR ~DToQ
data[cur]=temp[i1++]; {Bvj"mL]j
else if(temp[i1] data[cur]=temp[i1++]; F?+3%>/A@
else {BBw$m,o
data[cur]=temp[i2++]; RrrK*Fk8=
} unl1*4e+
} ;E;To\NCYF
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} C2U~=q>>
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改进后的归并排序: Pf_F59"
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package org.rut.util.algorithm.support; q(o/yx{bm
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import org.rut.util.algorithm.SortUtil; l*aj#%ha
yGBQ0o7E
/** jF ^5}5U
* @author treeroot od<b!4k~s
* @since 2006-2-2 <~emx'F|
* @version 1.0 }3 m0AQ;K
*/ [onqNp
public class ImprovedMergeSort implements SortUtil.Sort { BbOu/i|
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private static final int THRESHOLD = 10; @`"AHt
%u\26[/
/* 9-1#( Y6S
* (non-Javadoc) v9RW5
* I+ l%Sn#\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8^^[XbH
*/ /c#`5L[
public void sort(int[] data) { !eR3@%4
int[] temp=new int[data.length]; S0/usC[r
mergeSort(data,temp,0,data.length-1); $P o}
} V3N0Og3
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private void mergeSort(int[] data, int[] temp, int l, int r) { ~,6b_W p/
int i, j, k; zoDZZ%{
int mid = (l + r) / 2; [U =Uo*
if (l == r) l.)}t)my}
return; *4Fr&^M\
if ((mid - l) >= THRESHOLD) -4#2/GXNO
mergeSort(data, temp, l, mid); ^n.WZUk
else ws/63d*
insertSort(data, l, mid - l + 1); EpPf_ \o
if ((r - mid) > THRESHOLD) ^4Am %yyT
mergeSort(data, temp, mid + 1, r); `b5 @}',
else >RI>J.~
insertSort(data, mid + 1, r - mid); GyI-)BlDC
~ AQp|
for (i = l; i <= mid; i++) { 3:/'n
temp = data; 9%)=`W
} O09ke-lC
for (j = 1; j <= r - mid; j++) { ,1{Ep`
temp[r - j + 1] = data[j + mid]; hqSJ(gs{
} :6kjEI
int a = temp[l]; h~Q)Uy5N(D
int b = temp[r]; >-<8N-@"n
for (i = l, j = r, k = l; k <= r; k++) { R>@uY(>dJ
if (a < b) { Vn=qV3OE]
data[k] = temp[i++]; KLQTKMNv
a = temp; B@v\eF;
} else { ,3DXFV'uxb
data[k] = temp[j--]; Fig&&b a
b = temp[j]; `D5HC
} I3S9Us-\
} oS,I~}\kQ
} NVV}6TUV
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/** JWP*>\P
* @param data V:NI4dv/R
* @param l =ziwxIo6
* @param i U!w1AY|
*/ nQK|n^AU/
private void insertSort(int[] data, int start, int len) { hv$yV%.`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m#H3:-h,
} Ei>m0 ~<\
} C_:k8?
} xvLn'8H.
} N6QVt f.
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堆排序： u0`o A
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package org.rut.util.algorithm.support; ~vdkFc(8B
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import org.rut.util.algorithm.SortUtil; }A$WO{2
s Wjy6;
/** ({}(qm
* @author treeroot ewsKH\#
* @since 2006-2-2 ]LPQYL
* @version 1.0 !hxIlVd{
*/ X*oMFQgP
public class HeapSort implements SortUtil.Sort{ *DI)?
v`q\6i[-
/* (non-Javadoc) XkKC!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QvPD8B
*/ wt}9B[
public void sort(int[] data) { 5-u=o)>
MaxHeap h=new MaxHeap(); u<ySd?
h.init(data); eHg3}b2r
for(int i=0;i h.remove(); "](6lB1Oe
System.arraycopy(h.queue,1,data,0,data.length); 7XrfuG*L$
} cvsz%:Vs
z+2V4s=
private static class MaxHeap{ wgeNs9L
Zc&&[g
void init(int[] data){ >:sUL<p
this.queue=new int[data.length+1]; tS# `.F~y
for(int i=0;i queue[++size]=data; 5 +9Ze9
fixUp(size); :bU(S<%M
} Ac k}QzXO
} :HViX:]H
+~Cy$MCX
private int size=0; Fr?z"
DmqX"x%P
private int[] queue; Doze8pn
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public int get() { I~eSZ?$s#
return queue[1]; Z-=YM P ]Q
} <S"~vKD'
De *7OC
public void remove() { ["<nq`~
SortUtil.swap(queue,1,size--); ~!6K]hB4
fixDown(1); JeH;v0
} t/i5,le
file://fixdown C2e.2)y
private void fixDown(int k) { %n0;[sD0A
int j; UnWW/]E
while ((j = k << 1) <= size) { a.F Al@Br
if (j < size %26amp;%26amp; queue[j] j++; )8gGv
if (queue[k]>queue[j]) file://不用交换 Aez2*g3
break; 8Ad606
SortUtil.swap(queue,j,k); %6j)=IOts
k = j; Q<tu)Qo
} 4NEq$t$Jn
} Z*{] ,
private void fixUp(int k) { ye6H*K
while (k > 1) { YL^=t^!4
int j = k >> 1; 6w3R'\9
if (queue[j]>queue[k]) pz^<\
break; XP[uF ;w
SortUtil.swap(queue,j,k); K5Wg"^AHY/
k = j; I lR\ #
} u}hF8eD
} ,M !tm7
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} |Q~cX!;
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} ^:, l\Y
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SortUtil： c2l_$p
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package org.rut.util.algorithm; mbl]>JsQD
y2HxP_s?P?
import org.rut.util.algorithm.support.BubbleSort; =64r:E
import org.rut.util.algorithm.support.HeapSort; Eq%@"-mo
import org.rut.util.algorithm.support.ImprovedMergeSort; =?0lA_ 0
import org.rut.util.algorithm.support.ImprovedQuickSort; $L4/I!Yf
import org.rut.util.algorithm.support.InsertSort; 5vzceQE}
import org.rut.util.algorithm.support.MergeSort; E&$_`m;
import org.rut.util.algorithm.support.QuickSort; v'2[[u{7*
import org.rut.util.algorithm.support.SelectionSort; vZ7gS
import org.rut.util.algorithm.support.ShellSort; FaTa(3$%
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/** ".*x!l0y7
* @author treeroot co4h*?q
* @since 2006-2-2 RNVbcd
* @version 1.0 `D7C?M#j]
*/ w^k;D,h
public class SortUtil { "tit\a6\(
public final static int INSERT = 1; \h<BDk*
public final static int BUBBLE = 2; 89}Y5#W
public final static int SELECTION = 3; gE/Tj$
public final static int SHELL = 4; Fh7'[>onw
public final static int QUICK = 5; 0Y=![tO8
public final static int IMPROVED_QUICK = 6; oj,lz?
public final static int MERGE = 7; FX<b:#
public final static int IMPROVED_MERGE = 8; }!#gu3
public final static int HEAP = 9; W" "*ASi
`L;eba
public static void sort(int[] data) { @\_x'!R
sort(data, IMPROVED_QUICK); ` >!n
} {npcPp9
private static String[] name={ _#e&t"@GS
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" v ]Sl<%ry
}; gJt`?8t
*="8?Z
private static Sort[] impl=new Sort[]{ jdeV|H} u
new InsertSort(), }G46g#_6d>
new BubbleSort(), Q "r_!f
new SelectionSort(), `?\tUO2_T
new ShellSort(), TZir>5
new QuickSort(), ^62|d
new ImprovedQuickSort(), &}mw'_ I
new MergeSort(), (oK^c-x
new ImprovedMergeSort(), iyZZ}M
new HeapSort() r9 y.i(j
}; kyh_9K1
u D 5%E7
public static String toString(int algorithm){ TfxwVPX
return name[algorithm-1]; 8 S`9dSc
} .N4
egR9AEJvz
public static void sort(int[] data, int algorithm) { jkAAqRR
impl[algorithm-1].sort(data); "yziXT@V
} d&cU*
SQsSa1
public static interface Sort { %,@vWmn
public void sort(int[] data); R`Aj|C z
} ? Q@kg
~cAZB9Fa
public static void swap(int[] data, int i, int j) { ub0zJTFJ#
int temp = data; k@>\LR/v
data = data[j]; yDb'7(3-
data[j] = temp; >e5 *prx+
} !U_K&f
} - N>MBn