[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; ^>.?kh9z
} MM|&B`v@;
int i1=l; o(]kI?`
int i2=mid+1; }=^YLu=
for(int cur=l;cur<=r;cur++){ $ENA$
if(i1==mid+1) wHWd~K_q
data[cur]=temp[i2++]; 6JmS9ho
else if(i2>r) ORs<<H.d
data[cur]=temp[i1++]; 0 !E* >
else if(temp[i1] data[cur]=temp[i1++]; E$ q/4
else G<4H~1?P
data[cur]=temp[i2++]; r|fJ~0z
} oPk2ac
} <uU AAHi
,'= Y
} 'dQ2"x?4
|bi"J;y
改进后的归并排序: 09_3`K.*
UB|Nx(V s
package org.rut.util.algorithm.support; y,DK@X
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import org.rut.util.algorithm.SortUtil; }LM^>M%
(5_l7hWY
/** uWG'AmK_#E
* @author treeroot isj<lnQ
* @since 2006-2-2 NlU:e}zGR
* @version 1.0 16keCG\
*/ J}i$ny_3OB
public class ImprovedMergeSort implements SortUtil.Sort { rxI?|}4
;pU9ov4)
private static final int THRESHOLD = 10; $A7[?Ai ?
b}9K"GT
/* M86v
* (non-Javadoc) @_FL,AC&m
* ykRKZYfsw(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4^w>An6
*/ hDl& KE
public void sort(int[] data) { bG^E]a/D
int[] temp=new int[data.length]; CmJI"
mergeSort(data,temp,0,data.length-1); G-Sw`HHo
} e3F)FTG&
|w>"oaLN|Q
private void mergeSort(int[] data, int[] temp, int l, int r) { W`eYd|+C
int i, j, k; 5ii`!y
int mid = (l + r) / 2; k^C;"awh
if (l == r) d{9rEB?
return; F{[2|u(4
if ((mid - l) >= THRESHOLD) [bJ"*^M)
mergeSort(data, temp, l, mid); 4eU};Pv
else TcpD*%wW
insertSort(data, l, mid - l + 1); >Hic tH
if ((r - mid) > THRESHOLD) _&XT =SW}
mergeSort(data, temp, mid + 1, r); {tu* ="d=
else 'iXjt MX
insertSort(data, mid + 1, r - mid); .<u<!fL2
_66zXfM<
for (i = l; i <= mid; i++) { =k2+VI
temp = data; H }uT'
} >pv~$
for (j = 1; j <= r - mid; j++) { +{]/ b%P
temp[r - j + 1] = data[j + mid]; HzQ6KYAMq
} @-qxNw
int a = temp[l]; kzLj1Ix2
int b = temp[r]; n1y#gC
for (i = l, j = r, k = l; k <= r; k++) { r7C m
if (a < b) { yHCQY4/
data[k] = temp[i++]; G+m|A*[>
a = temp; A}~hc&J
} else { h[C!cX
data[k] = temp[j--]; yf3%g\k
b = temp[j]; {Ylj]
} 9H1R0iWW
} \r324Bw>2
} k1$|vzMh
<Sm=,Sw
/** k:m~'r8z
* @param data f3y_&I+zl
* @param l I?4J69'
* @param i V F6OC4 K
*/ 7T_g?!sdMh
private void insertSort(int[] data, int start, int len) { @s/;y VVq
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x\3 ` W
} qoB
} O*H:CW
} MZ=U} &F
} xPQO}wKa
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堆排序： ;?=nr5;q
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package org.rut.util.algorithm.support; RNRMw;cT
E0ud<'3<
import org.rut.util.algorithm.SortUtil; /B|#GJ\\3
]=WJ%p1l
/** KKGAk\X
* @author treeroot YDi_Gl$
* @since 2006-2-2 @r+ErFI
* @version 1.0 dI>)4()
*/ SN?jxQ
public class HeapSort implements SortUtil.Sort{ 0AJ6g@t[
asQ pVP
/* (non-Javadoc) wy&VClT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) : 60PO
*/ xb8fV*RO8A
public void sort(int[] data) { }YU#}Ip@
MaxHeap h=new MaxHeap(); X2dTV}~i
h.init(data); u-OwL1S+
for(int i=0;i h.remove(); %+gze|J
System.arraycopy(h.queue,1,data,0,data.length); {'"A hiR/
} KOhy)h+ h
fa\<![8LAU
private static class MaxHeap{ o$d; Y2K
y\5V(Q\
void init(int[] data){ S,G=MI"
this.queue=new int[data.length+1]; +_:Ih,-
for(int i=0;i queue[++size]=data; n_$lRX5
fixUp(size); ?tqTG2!(
} e>nRJH8pK
} ,EcmMI^A
[ueT]%
private int size=0; ukS@8/eJ
a=p3oh?%-O
private int[] queue; %L/Wc,My
ppb]RN|)
public int get() { wA.YEI|CSj
return queue[1]; 4)JrOe&k
} *N\U{)b\
zclt2?
public void remove() { j[wGR_EE
SortUtil.swap(queue,1,size--); 0u'2f`p*
fixDown(1); hS*3yCE"8
} zoC/Hm
file://fixdown >AN`L`%2
private void fixDown(int k) { Ulj2Py}
int j; $o/?R]h
while ((j = k << 1) <= size) { J:#B,2F+^
if (j < size %26amp;%26amp; queue[j] j++; oF]0o`U&a
if (queue[k]>queue[j]) file://不用交换 E`LML?
break; Fd5{pM3
SortUtil.swap(queue,j,k); K`(STvtM
k = j; d!G%n *
} NjYpNd?g
} KSh<_`j
private void fixUp(int k) { ll[U-v{
while (k > 1) { KDRIy@[e
int j = k >> 1; VH#]67
if (queue[j]>queue[k]) u;!CQ w/
break; 7k+UCiu>
SortUtil.swap(queue,j,k); qFe|$rVVIl
k = j; #jA|04w
} 3<m"z9$
} ~`T(mh',
f*W<N06EZ
} ln9MVF'!&
n U$Lp`
} %9{4g->
sKn>K/4JZ
SortUtil： :E4i@ O7%
e#FaK^V
package org.rut.util.algorithm; sw{EV0&>m
c!{.BgGN
import org.rut.util.algorithm.support.BubbleSort; 2NIK0%6
import org.rut.util.algorithm.support.HeapSort; a(d'iAU8^
import org.rut.util.algorithm.support.ImprovedMergeSort; r'{pTgm#
import org.rut.util.algorithm.support.ImprovedQuickSort; g 4Vt"2|
import org.rut.util.algorithm.support.InsertSort; Xw9,O8}C7
import org.rut.util.algorithm.support.MergeSort; ;Qk*h'}f
import org.rut.util.algorithm.support.QuickSort; zHDC8m
import org.rut.util.algorithm.support.SelectionSort; @_1$ <8
import org.rut.util.algorithm.support.ShellSort; ^a<=@0|
?#pL\1"E
/** Gp@Y=mU
* @author treeroot jpm}EOq<%
* @since 2006-2-2 47`{ e_YP0
* @version 1.0 2$qeNy
*/ pOIFO=k
public class SortUtil { +;FF0_
public final static int INSERT = 1; "Q2[A]4E
public final static int BUBBLE = 2; 6$fC R
public final static int SELECTION = 3; cl:*Q{(Cjk
public final static int SHELL = 4; AGK+~EjL@
public final static int QUICK = 5; g@B9i=
public final static int IMPROVED_QUICK = 6; #\%GrtM
public final static int MERGE = 7; t~sW]<qjp
public final static int IMPROVED_MERGE = 8; MT%ky
public final static int HEAP = 9; ,dZ 9=]
<`-"K+e!J
public static void sort(int[] data) { CEqfsKrsxE
sort(data, IMPROVED_QUICK); 1hi^
} \&ERSk2
private static String[] name={ GlQ=M)E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ;bP7|
}; V%Y.N4H
7dV^35 KP
private static Sort[] impl=new Sort[]{ 0S/&^
new InsertSort(), \ E[0KvN;O
new BubbleSort(), PCt&66F
new SelectionSort(), 8Q#&=]W$
new ShellSort(), 97F$$d54T
new QuickSort(), Br\/7F
new ImprovedQuickSort(), V&h,v%$
new MergeSort(), eA{,=,v)
new ImprovedMergeSort(), t m5>J)C
new HeapSort() 9L!Vj J
}; zx#d_SVi
<XCH{Te1
public static String toString(int algorithm){ 47$JN}qI0
return name[algorithm-1]; -?LSw
} Z#7HuAF{]
+1h^9Y'
public static void sort(int[] data, int algorithm) { >a_K:O|AJ
impl[algorithm-1].sort(data); 1;ZEuO
} ?em)om
<KHB/7
public static interface Sort { O}IS{/^7
public void sort(int[] data); F^A1'J
} +/x|P-
~X`vRSrH
public static void swap(int[] data, int i, int j) { f4!^0%l
int temp = data; 8b6:n1<fn
data = data[j]; F^`sIrZvs
data[j] = temp; P5] cEZ n
} *$^ME
} nU`vj`K