[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; `wG&Cy]v
} 55|$Imnf
int i1=l; g(;ejKSR
int i2=mid+1; N=L urXv
for(int cur=l;cur<=r;cur++){ }mJ)gK5b 6
if(i1==mid+1) B "}GAk}V
data[cur]=temp[i2++]; I`KN8ll
else if(i2>r) 9p$q@Bc
data[cur]=temp[i1++]; `^N;%[c`z
else if(temp[i1] data[cur]=temp[i1++]; J5rR?[i{
else WCWBvw4&"{
data[cur]=temp[i2++]; bm7$DKp#
} r*3XM{bZ/@
} QnOa?0HL/
p|bpE F=U
} ]g+(#x_.?
IweQB}d
改进后的归并排序: qx? lCz a"
Cw^)}23R
package org.rut.util.algorithm.support; EGMcU|yL
wy&*6>.
import org.rut.util.algorithm.SortUtil; O "h+i>|l
#QDV_ziE5
/** XJ NKM~
* @author treeroot CC87<>V
* @since 2006-2-2 nocH~bAf2
* @version 1.0 !kKKJ~,;
*/ )DLK<10
public class ImprovedMergeSort implements SortUtil.Sort { y! 1NS
rC*nZ*
private static final int THRESHOLD = 10; (c*Dvpo1
SI(8.$1
/* )*JTxMQ
* (non-Javadoc) \)"qN^we
* ?%0i,p@<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -jw=Iyv
*/ "7 4L
public void sort(int[] data) { Cw2+@7?|
int[] temp=new int[data.length]; ,^,J[F
mergeSort(data,temp,0,data.length-1); bU,&|K/
} LtvyWc`
Gsh2
private void mergeSort(int[] data, int[] temp, int l, int r) { 3a S>U #
int i, j, k; -T(V6&'Qi
int mid = (l + r) / 2; f3h9CV
if (l == r) nb!m>0*/
return; Qqaf\$X
if ((mid - l) >= THRESHOLD) QtzHr
mergeSort(data, temp, l, mid); K^vMIoh
else g?+P&FL#I
insertSort(data, l, mid - l + 1); +]_} \
if ((r - mid) > THRESHOLD) Zj0&/S
mergeSort(data, temp, mid + 1, r); dk ?0r
else ,J#5Y.
insertSort(data, mid + 1, r - mid); x[kdQj2[&
zC^Ib&gm>,
for (i = l; i <= mid; i++) { 8vP)qy8
temp = data; /L8=8
} D.GSl
for (j = 1; j <= r - mid; j++) { u!S{[7 FY
temp[r - j + 1] = data[j + mid]; A|+{x4s`
} 8YJ({ Ou_
int a = temp[l]; Y#5S;?bR
int b = temp[r]; ]_,~q@r$
for (i = l, j = r, k = l; k <= r; k++) { *]=)mM#
if (a < b) { BW;u?1Xa
data[k] = temp[i++]; _B[(/wY
a = temp; yiUdUw/
} else { 32Z4&~I
data[k] = temp[j--]; dA~6{*)
b = temp[j]; h 2zCX
} y%y#Pb|
} q.t5L=l^ r
} mB~&nDU
6bn-NY:i
/** b +_E)4
* @param data }1P
* @param l yC5|"+ A$
* @param i *$1)&2i
*/ 5%$#3LT|
private void insertSort(int[] data, int start, int len) { 3WYW])
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m}E$6E^~O
} koU.`l.
} td~3N,S
} !]nCeo
} cG'Wh@
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堆排序： `xr%LsNn
+1%6-g4"
package org.rut.util.algorithm.support; 7$;$4.'
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import org.rut.util.algorithm.SortUtil; {1+H$v
FRW.
/** #wyS?FP-
* @author treeroot UTt#ltun?
* @since 2006-2-2 Id0F2 [
* @version 1.0 ;a`X|N9
*/ ~83P09\T%
public class HeapSort implements SortUtil.Sort{ 5 $J
@6SSk=9_S
/* (non-Javadoc) ik*_,51Zj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,L;vN6~
*/ ^q`*!B9@
public void sort(int[] data) { Vmc)or*#
MaxHeap h=new MaxHeap(); ZJ(!jc$"*%
h.init(data); aBnbu vp
for(int i=0;i h.remove(); ccSSau5N
System.arraycopy(h.queue,1,data,0,data.length); v#FUD-Z
} G;;~xfE'
96avgyc
private static class MaxHeap{ luT8>9X^:a
u"jnEKN0y
void init(int[] data){ LayU)TIt
this.queue=new int[data.length+1]; 8gNEL+
for(int i=0;i queue[++size]=data; nmGHJb,$
fixUp(size); a5M>1&j/eC
} V]}b3Y!(
} Vvj]2V3
8rYK~Sz
private int size=0; }t'^Au`X
fL;p^t u3
private int[] queue; ULjzhy+(8
jHCKV
public int get() { |_*$+
return queue[1]; Kc0OLcu^d
} P+0xi
[4j;FN Fa
public void remove() { v3Yj2LSqx
SortUtil.swap(queue,1,size--); A$X&vR[6
fixDown(1); 3#[I_
} MV}]i@V
file://fixdown `%3p.~>
private void fixDown(int k) { p/~kw:I
int j; N3<Jh
while ((j = k << 1) <= size) { E6k&r}
if (j < size %26amp;%26amp; queue[j] j++; YC<I|&"
if (queue[k]>queue[j]) file://不用交换 K7c8_g*>4=
break; _O%p{t'q<
SortUtil.swap(queue,j,k); DG=Ap:sl*$
k = j; ]o$/xP
} df& |Lc1J
} 8A.7=C' z
private void fixUp(int k) { 'wrpW#
while (k > 1) { tqCg<NH.!m
int j = k >> 1; [@Y q^.6t
if (queue[j]>queue[k]) C6~dN&q
break; /p0LtUMu
SortUtil.swap(queue,j,k); us%RQ8=k
k = j; zQ}N mlk
} !++62Lf
} 8zWPb
[Gy'0P(EQ
} V?BVk8D};
5FI>T=QF
} iGLYM-
-d'|X`^nE
SortUtil： GNc|)$
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package org.rut.util.algorithm; z_@zMLs
FaE orQ
import org.rut.util.algorithm.support.BubbleSort; g"S+V#R
import org.rut.util.algorithm.support.HeapSort; V&v~kzLr+
import org.rut.util.algorithm.support.ImprovedMergeSort; T(^8ki
import org.rut.util.algorithm.support.ImprovedQuickSort; gq3OCA!cX
import org.rut.util.algorithm.support.InsertSort; GuvF
import org.rut.util.algorithm.support.MergeSort; |LE++t*X~
import org.rut.util.algorithm.support.QuickSort; mtddLd,
import org.rut.util.algorithm.support.SelectionSort; e622{dfVS
import org.rut.util.algorithm.support.ShellSort; v^fOT5\
lG>e6[Wc
/** :0/o?'s
* @author treeroot b]?;R
* @since 2006-2-2 4CT9-2UC
* @version 1.0 z,YUguc|
*/ .6o y>4
public class SortUtil { hP8&n9o
public final static int INSERT = 1; $4JX#lkt
public final static int BUBBLE = 2; }tO<_f))
public final static int SELECTION = 3; PM!t"[@&
public final static int SHELL = 4; $i~`vu*
public final static int QUICK = 5; y/hvH"f
public final static int IMPROVED_QUICK = 6; :~R Fy?xRa
public final static int MERGE = 7; i!x5T%x_
public final static int IMPROVED_MERGE = 8; @|%ICG c
public final static int HEAP = 9; eh4"_t
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public static void sort(int[] data) { [(EH
sort(data, IMPROVED_QUICK); %MZDm&f>Kk
} O \8G~V 5"
private static String[] name={ Ia:puks=
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \ZWmef
}; _J~ta.
ik0Q^^1?Y
private static Sort[] impl=new Sort[]{ ULmdt
new InsertSort(), {0WIDD
new BubbleSort(), 4Xk;Qd
new SelectionSort(), F6]!?@
new ShellSort(), oHd0 <TO
new QuickSort(), +gCy@_2;
new ImprovedQuickSort(), P Xn>x8z
new MergeSort(), 1'm`SRX#e
new ImprovedMergeSort(), i}F;fWZ`
new HeapSort() )h_7 2
}; !nBm}E7d
[k7N+W8
public static String toString(int algorithm){ fUKdC\WL
return name[algorithm-1]; LY:?OGh
} ?mfWm{QTt
qS}RFM5|
public static void sort(int[] data, int algorithm) { BBE1}V!u
impl[algorithm-1].sort(data); ^^3va)1{!
} x][9ptrh
gdFoTcHgO|
public static interface Sort { NG!cEo:2aa
public void sort(int[] data); 3nC#$L-
} cW\Y?x
Yk@s"qm3
public static void swap(int[] data, int i, int j) { ::Q);
int temp = data; G|oB'~{&
data = data[j]; &\lS
data[j] = temp; -L3 |9k
} pXj/6+^
} Q*&aC|b&