[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; =6Ihk
} 7ae8nZ3&
int i1=l; t[XxLG*
int i2=mid+1; ;gu_/[P
for(int cur=l;cur<=r;cur++){ &ScADmZP^d
if(i1==mid+1) oyiEOC
data[cur]=temp[i2++]; MyXgp>?~T
else if(i2>r) X~T"n<:a>
data[cur]=temp[i1++]; Yw vXSA
else if(temp[i1] data[cur]=temp[i1++]; C2<!.l
else '!I^Lfz-Z
data[cur]=temp[i2++]; m\)z& hv<r
} D4?5%s
} M8oI8\6[
RU|{'zC\v
} i"p)%q~ z
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改进后的归并排序: _p"nR
hS/oOeG<Y
package org.rut.util.algorithm.support; 8A~5@
b7^VWX%
import org.rut.util.algorithm.SortUtil; J]^)vxm3
$*tq$DZ4&
/** h/j+b.|
* @author treeroot PMebn$(
* @since 2006-2-2 Q-k{Lqa-
* @version 1.0 mFC0f?nr
*/ mzLDZ#=b
public class ImprovedMergeSort implements SortUtil.Sort { I9-vV>:z
Y9F!HM-`
private static final int THRESHOLD = 10; |W];8
n[H3b}
/* hiZE8?0+~N
* (non-Javadoc) eQbDs_
* q$(@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L1 1/XpR
*/ (,#Rj$W
public void sort(int[] data) { '8R5?9"
int[] temp=new int[data.length]; wuSp+?{5k
mergeSort(data,temp,0,data.length-1); AL74q[>
} .H {
2"*7HS
private void mergeSort(int[] data, int[] temp, int l, int r) { K+5S7wFDZ
int i, j, k; po~V{>fUm
int mid = (l + r) / 2; S-&[Tp+N
if (l == r) q-P$ \":
return; uDJi2,|n
if ((mid - l) >= THRESHOLD) rnz9TmN:*1
mergeSort(data, temp, l, mid); - |n\
else .{%~4$yu7
insertSort(data, l, mid - l + 1); X YO09#>&
if ((r - mid) > THRESHOLD) &^KmfT5C
mergeSort(data, temp, mid + 1, r); n>T1KC%
else 484lB}H
insertSort(data, mid + 1, r - mid); mojD
>DeG//rv
for (i = l; i <= mid; i++) { P$?3\`U;
temp = data; 20h|e+3
} (=cR;\s<
for (j = 1; j <= r - mid; j++) { +`O8cHx
temp[r - j + 1] = data[j + mid]; :oh(M|;/2
} u4*7n-(
int a = temp[l]; BQq,,i8H
int b = temp[r]; bU9B2'%E
for (i = l, j = r, k = l; k <= r; k++) { ;gfY_MXnF
if (a < b) { JDrh-6Zgj
data[k] = temp[i++]; RLBjl%Q>
a = temp; PYX]ld.E
} else { m22M[L(q
data[k] = temp[j--]; 28J ;9
b = temp[j]; 4)./d2/E
} x;ym_UZ6e
} \' (_r
} {Bk9]:'$5
H-$)@
/** y1z<{'2x
* @param data T|dQY~n~
* @param l +`4`OVE_#
* @param i 1sKKmtgH
*/ b<o Uy
private void insertSort(int[] data, int start, int len) { ,&[2z!
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); d:jD
} yG -1g0
} eq+t%
} 1~/?W^ir
} {a-bew
lIPy)25~
堆排序： Sp8Xka~5*#
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package org.rut.util.algorithm.support; fZ!fwg$
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import org.rut.util.algorithm.SortUtil; ^c",!Lp}{
Mr'P0^^
/** [!9dA.tF
* @author treeroot +NL^/y<;
* @since 2006-2-2 qd\5S*Z1
* @version 1.0 Cj^:8 ?%
*/ )vVt{g
public class HeapSort implements SortUtil.Sort{ Ln/6]CMl
>Hb>wlYR
/* (non-Javadoc) <8#Q5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IH|PdVNtg
*/ )QS4Z{)U
public void sort(int[] data) { uJ;7]
MaxHeap h=new MaxHeap(); 1d)wE4c=Z
h.init(data); dER#)bGj
for(int i=0;i h.remove(); z<2!|
System.arraycopy(h.queue,1,data,0,data.length); t}r`~AEa!
} &E|2-)
gx+bKGB`
private static class MaxHeap{ wBlfQ w-N
$U=E7JO
void init(int[] data){ ZNb;24
this.queue=new int[data.length+1]; <-KHy`u
for(int i=0;i queue[++size]=data; F&?55@b
fixUp(size); {B^V_TX2
} u%n6!Zx
} 9+<%74|,
ds@X%L;_
private int size=0; g=w,*68vuy
A$*#n8,
private int[] queue; O%RkU?ME
jSa9UD
public int get() { TS0x8,'$q
return queue[1]; X"QIH|qx-
} 0uX"KL]Elf
sjh>i>t
public void remove() { P(OgT/7A
SortUtil.swap(queue,1,size--); &6!~Q,;K-
fixDown(1); vd>K=! J
} |X&.+RI
file://fixdown hT:+x3
private void fixDown(int k) { o!.\+[
int j; 7w}D2|+
while ((j = k << 1) <= size) { x:'M\c7
if (j < size %26amp;%26amp; queue[j] j++; ~3k& =3d]
if (queue[k]>queue[j]) file://不用交换 l|#WQXs*c{
break; OU)~ 02|\
SortUtil.swap(queue,j,k); ;A^0="x&
k = j; jwsl"zL
} w`Q"mx*
} !: e(-
private void fixUp(int k) { c)H(w
while (k > 1) { 4dy2m!
int j = k >> 1; a^yBtb~,P
if (queue[j]>queue[k]) lZT9 SDtS
break; h{zE;!+)D
SortUtil.swap(queue,j,k); @\-i3EhR
k = j; J6x#c`Y
} yn&AMq ]o
} Z4YQ5O5
]3.Un,F
} Cj~45)r
v(ABZNIn
} Q`$Q(/
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SortUtil： LxqK@Q<B
,(aOTFQS
package org.rut.util.algorithm; 7U=|>)Q0s
G9?6qb:
import org.rut.util.algorithm.support.BubbleSort; kOfq6[JC
import org.rut.util.algorithm.support.HeapSort; HI}$Z=C
import org.rut.util.algorithm.support.ImprovedMergeSort; BR8W8nRb
import org.rut.util.algorithm.support.ImprovedQuickSort; $HjKELoJ<
import org.rut.util.algorithm.support.InsertSort; ?Y6MC:l<
import org.rut.util.algorithm.support.MergeSort; CPRv"T;?
import org.rut.util.algorithm.support.QuickSort; ,:yv T6)p
import org.rut.util.algorithm.support.SelectionSort; =n $@
import org.rut.util.algorithm.support.ShellSort; uP,{yna(
s|3@\9\
/** ) V}q7\G~
* @author treeroot k+k&}8e
* @since 2006-2-2 $'$#Xn,hU
* @version 1.0 _4E . P
*/ W}+f}/&l
public class SortUtil { =GO/r;4
public final static int INSERT = 1; )c9]}:W&
public final static int BUBBLE = 2; 5`:+NwXS2
public final static int SELECTION = 3; U3SF'r8
public final static int SHELL = 4; ">b~k;M?
public final static int QUICK = 5; P3[+c4
public final static int IMPROVED_QUICK = 6; bkmW[w:M
public final static int MERGE = 7; -VK6Fq
public final static int IMPROVED_MERGE = 8; -w41Bvz0
public final static int HEAP = 9; o`^GUY}
RG(m:N
public static void sort(int[] data) { s3m]rC
sort(data, IMPROVED_QUICK); ?h`Ned0P
} ?3:OPP`s
private static String[] name={ e@k`C{{C]o
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /m,0H)w1
}; _!FM^N}|
TmS;ybsG
private static Sort[] impl=new Sort[]{ aQax85
new InsertSort(), 7mulNq
new BubbleSort(), S@suPkQ<>
new SelectionSort(), wn*z*
new ShellSort(), x?Wt\<|h!
new QuickSort(), UN`F|~@v
new ImprovedQuickSort(), c"ukV_6~J
new MergeSort(), y^; =+Z
new ImprovedMergeSort(), ]+\@_1<ZI
new HeapSort() /BWJ)6#H
}; MWSx8R)PN
?f+w:FO
public static String toString(int algorithm){ G?-27Jk8
return name[algorithm-1]; U_a)g X
} 8kZ~
&fBLPF%6
public static void sort(int[] data, int algorithm) { %gd=d0vm
impl[algorithm-1].sort(data); 5,:tjn
} !O$*/7
a!"81*&4#
public static interface Sort { )c@I|L
public void sort(int[] data); $[VeZ-
} DM6oMT
o/I<)sa
public static void swap(int[] data, int i, int j) { fShf4G_w\
int temp = data; ')#E,Y%Hq
data = data[j]; dfB#+wh
data[j] = temp; T:0X-U
} 2G"mm(
} bhXH<=