[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; FxeDjAP
} "^Y)&<J&
int i1=l; ra2sYH1wr
int i2=mid+1; 9.)*z-f$
for(int cur=l;cur<=r;cur++){ Y">m g=B
if(i1==mid+1) QhR.8iS
data[cur]=temp[i2++]; 2O;Lw@W
else if(i2>r) :Yeo*v9
data[cur]=temp[i1++]; T%zCAfx m
else if(temp[i1] data[cur]=temp[i1++]; 5P'o+Vwz
else Va"H.]
data[cur]=temp[i2++]; lOB*M!8
} Av6=q=D
} trlZ^K
ts|dk%
} 742sqHx
'9d<vWg
改进后的归并排序: :buH\LB*P
$$'a
package org.rut.util.algorithm.support; su:~Xd
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import org.rut.util.algorithm.SortUtil; RgTm^?Ex
2yB)2n#ut
/** [=/Yo1:v
* @author treeroot rFn%e
* @since 2006-2-2 =T7lv%u
* @version 1.0 uT1xvXfqP
*/ bzj9U>eY
public class ImprovedMergeSort implements SortUtil.Sort { 8d4:8}
5~8FZ-x
private static final int THRESHOLD = 10; tFj[>_d7
}enS'Fpf`
/* MC\rx=cR\
* (non-Javadoc) pX 4:WV
* Ei$?]~ &
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CB!5>k+mC
*/ *aem5E`c
public void sort(int[] data) { MZPXI{G
int[] temp=new int[data.length]; I7=g8/JD
mergeSort(data,temp,0,data.length-1); hKx*V"7/#\
} {Tr5M o
X6h@K</c^:
private void mergeSort(int[] data, int[] temp, int l, int r) { 1UHlA8w7Q
int i, j, k; &Hl*Eg f
int mid = (l + r) / 2; 5Yxs_t4
if (l == r) uDe%M
return; &<Iyb}tA?
if ((mid - l) >= THRESHOLD) ng0tNifZ;
mergeSort(data, temp, l, mid); n8K FP
else ?v5OUmFM
insertSort(data, l, mid - l + 1); W~W`fm
if ((r - mid) > THRESHOLD) EdC^L`::
mergeSort(data, temp, mid + 1, r); ;~^9$Z@%Q
else 5u:{lcC.X
insertSort(data, mid + 1, r - mid); jWUpzf)q=T
wO-](3A-8P
for (i = l; i <= mid; i++) { \c1NIuJR
temp = data; 0`H)c) pP
} DQ08dP((v
for (j = 1; j <= r - mid; j++) { )NjxKSiU@
temp[r - j + 1] = data[j + mid]; <w1#3Mu'
} :c?}~a~JO(
int a = temp[l]; 0b3z(x!O
int b = temp[r]; fR^aFT
for (i = l, j = r, k = l; k <= r; k++) { q8=hUD%5C
if (a < b) { )ZHo7X
data[k] = temp[i++]; [V2`t'
a = temp; /4xp?Lo:
} else { j34L*?
data[k] = temp[j--]; .ou#BWav/
b = temp[j]; &pk&8_=f
} :enmMB#%
} WF&?OHf2
} ]A.tauSW
xlHC?d0}
/** %fzZpd]v=,
* @param data qiyX{J7Z
* @param l F,)\\$=,
* @param i iH;IXv,b3
*/ i|/EA7
private void insertSort(int[] data, int start, int len) { o)U4RY*
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Up*.z\|'y
} h+"UK=
} jjTb:Z=.'
} 1 Vq)& N
} 7wA.:$
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堆排序： c:OFBVZ
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package org.rut.util.algorithm.support; qTV;L-
gq`S`
import org.rut.util.algorithm.SortUtil; '^#=,+ A
_ !r]**
/** V W2+ Bs}
* @author treeroot na)-'
* @since 2006-2-2 nS$_VJ]~
* @version 1.0 rq]zt2
*/ 6!Z>^'6
public class HeapSort implements SortUtil.Sort{ DX\|*:,
Q.zE}ZS
/* (non-Javadoc) or)v:4PXW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f*HEw
*/ $eQf5)5
public void sort(int[] data) { i7#PYt
MaxHeap h=new MaxHeap(); f?P>P23
h.init(data); k __MYb
for(int i=0;i h.remove(); hP$v,"$
System.arraycopy(h.queue,1,data,0,data.length); {!]7=K)W9
} a|u&N:v7B
uNoP8U%*
private static class MaxHeap{ SAUfA5|e
6{8dv9tK
void init(int[] data){ [)S7`K;
this.queue=new int[data.length+1]; 5k]xi)%
for(int i=0;i queue[++size]=data; >x0)
fixUp(size); zc4l{+3
} b>_eD-
} N{<9Njmm
}]K^b1Fs5
private int size=0; P"k`h=>!4
"gQA|NHwV
private int[] queue; M"l<::z
FcI ZG _
public int get() { PS\n0
return queue[1]; 27CVAX ghV
} A!bH0=<I
4w<4\zT_U}
public void remove() { L32[IL|
SortUtil.swap(queue,1,size--); g71|t7Q
fixDown(1); RX6s[uQ
} wB0Ke
file://fixdown ~IIlCmMl,
private void fixDown(int k) { p*l]I*x'<
int j; WN`|5"?$
while ((j = k << 1) <= size) { !%,k]m'
if (j < size %26amp;%26amp; queue[j] j++; oD?c]}3
if (queue[k]>queue[j]) file://不用交换 Vh o3I[C
break; Z7:TPY$b
SortUtil.swap(queue,j,k); _U%fD|t
k = j; gXzp$#
} @jvF[wi;
} p"lTZ7c:Y
private void fixUp(int k) { W\W|v?r
while (k > 1) { 265sNaX
int j = k >> 1; K$K6,54y
if (queue[j]>queue[k]) k%[pZ5.!
break; nWd]P\a'V
SortUtil.swap(queue,j,k); Z[&7NJo(
k = j; OB&lq.r
} '=^$;3Z
} Z\@m_/g
<l,Kg 'v
} hj8S#
k;AV'r
} R"0fZENTG
V6.w=6:`X
SortUtil： k8~/lE.Wy
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package org.rut.util.algorithm; 5NT?A,r"
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import org.rut.util.algorithm.support.BubbleSort; 5V{ B,T
import org.rut.util.algorithm.support.HeapSort; GG KD8'j]
import org.rut.util.algorithm.support.ImprovedMergeSort; { 4(E @
import org.rut.util.algorithm.support.ImprovedQuickSort; >>'t7U##
import org.rut.util.algorithm.support.InsertSort; ?uq7K"B
import org.rut.util.algorithm.support.MergeSort; B<`'h
import org.rut.util.algorithm.support.QuickSort; jZ;dY~fE
import org.rut.util.algorithm.support.SelectionSort; rps2sXGr
import org.rut.util.algorithm.support.ShellSort; 2?)bpp$WZ
^3qo%=i
/** e!:/enQo
* @author treeroot m)]A$*`<
* @since 2006-2-2 (zm5 4 Vm
* @version 1.0 )kq3q5*_
*/ b.<>CG'
public class SortUtil { BgzER[g|q{
public final static int INSERT = 1; )Apg
public final static int BUBBLE = 2; x9c/;Q&m
public final static int SELECTION = 3; X)tf3M {J@
public final static int SHELL = 4; d_0r
public final static int QUICK = 5; axRzn:f
public final static int IMPROVED_QUICK = 6; |]<eJ|\=
public final static int MERGE = 7; eTV%+
public final static int IMPROVED_MERGE = 8; .>K):|Opv
public final static int HEAP = 9; $SP*hkU
b0~AN#Es
public static void sort(int[] data) { J5J$qCJq
sort(data, IMPROVED_QUICK); ;U +;NsCH
} Or0eY#c
private static String[] name={ kg>Ymo.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" D~;hIt*
}; k#4%d1O}
ON(H7
private static Sort[] impl=new Sort[]{ ^Ms)T3dM
new InsertSort(), >@2l/x8;
new BubbleSort(), T@n-^B!Xq
new SelectionSort(), <By6%<JTn
new ShellSort(), z)Y<@2V*C
new QuickSort(), SX{shM2
new ImprovedQuickSort(), }]pq&v!
new MergeSort(), Hno:"k?
new ImprovedMergeSort(), h[D"O6 y
new HeapSort() ]Dm'J%P0}
}; r\y~ :
XEF|B--,
public static String toString(int algorithm){ Epm\=s
return name[algorithm-1]; XqVhC):
} VGoD2,(b^
\(t.|
public static void sort(int[] data, int algorithm) { n*6b*fl
impl[algorithm-1].sort(data); .6%-Il
} [&n2 yt
@ 8yV15!
public static interface Sort { ;z;O}<8s
public void sort(int[] data); hKw4[wB]
} \ajy%$;$}
^Bw2y&nN
public static void swap(int[] data, int i, int j) { Cf`s:A5<J
int temp = data; =6b^j]1
data = data[j]; 8kQ >M
data[j] = temp; <d,Qi.G4
} Z~^)B8
} 1 dT1DcZ