[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; g6MK~JG$?h
} BVU>M*k
int i1=l; q9|'!m5K
int i2=mid+1; `5:b=^'D/
for(int cur=l;cur<=r;cur++){ RAPR-I;{
if(i1==mid+1) mSr(PIH{\
data[cur]=temp[i2++]; PCtf&U
else if(i2>r) "5,'K~hz
data[cur]=temp[i1++]; '_>8_
else if(temp[i1] data[cur]=temp[i1++]; 'Y`or14E
else qi!+Ceo}
data[cur]=temp[i2++]; 5NHNnDhuL
} T@Mrbravc
} lG6P+ Z/nf
'a[|'
} yJNQO'wcv
@X5F$=aqZr
改进后的归并排序: @#rF8;
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package org.rut.util.algorithm.support; l]C#bL>i
P9c!
import org.rut.util.algorithm.SortUtil; br`cxgZ0"
~qT5F)$B-
/** b"iPuN!p
* @author treeroot Dn~c
* @since 2006-2-2 yH/m@#
* @version 1.0 _TEjB:9eY
*/ R.^ Y'TLyc
public class ImprovedMergeSort implements SortUtil.Sort { dg-nv]7
b@`h]]~:
private static final int THRESHOLD = 10; Bq@_/*'*Y
bi~1d"j
/* gM>geWB<
* (non-Javadoc) v[57LB
* ebfT%_N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 05hjC
*/ LD/NMb
public void sort(int[] data) { a]\l:r
int[] temp=new int[data.length]; 4h~CDy%_
mergeSort(data,temp,0,data.length-1); ip8%9fG\>
} _Fkz^B*
B63puX{u#
private void mergeSort(int[] data, int[] temp, int l, int r) { 07b=Zhh
int i, j, k; "RcNy~
int mid = (l + r) / 2; i24t$7q
if (l == r) eCFMWFhC
return; Q,v/]bXd
if ((mid - l) >= THRESHOLD) 9lqH
mergeSort(data, temp, l, mid); %[B^b)2
else /xq^]0xy
insertSort(data, l, mid - l + 1); \:y oS>G
if ((r - mid) > THRESHOLD) QNWGUg4*&
mergeSort(data, temp, mid + 1, r); z*k(` '
else h>k[
insertSort(data, mid + 1, r - mid); < #FxI
Nux
for (i = l; i <= mid; i++) { 4]G J+a
temp = data; FJQ=611@
} Uhs/F:E[A
for (j = 1; j <= r - mid; j++) { 4Dy|YH$>S
temp[r - j + 1] = data[j + mid]; *\gYs{,
} TAB'oLNp
int a = temp[l]; 1 K(0tG:5
int b = temp[r]; 0#Ae<
for (i = l, j = r, k = l; k <= r; k++) { 717S3knlv
if (a < b) { O#MaZ.=
data[k] = temp[i++]; N1iP!m9Q
a = temp; )5Wt(p:T6_
} else { 1Be/(pSc
data[k] = temp[j--]; m941 Y
b = temp[j]; vB<9M-sa0
} {:]u 6l
} \Vb|bw'e(
} q{Ao j
P"[\p|[U
/** owviIZFe
* @param data X{Ij30Bmv
* @param l DrK@y8
* @param i n{$! ]^>
*/ A3^_'K
private void insertSort(int[] data, int start, int len) { L.2!Q3&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y6G`p
} 3!M|Sf<s
} 'C7$,H'
} 70-nAv
} twMDEw#VL
u+ b `aB
堆排序： Z\r?>2
O\F$~YQ
package org.rut.util.algorithm.support; go9tvK
Yz)+UF,
import org.rut.util.algorithm.SortUtil; 4OeH}@a
v`hn9O
/** [nA1WFfM
* @author treeroot |"g+p)A
* @since 2006-2-2 R0~w F>
* @version 1.0 !LM9
*/ FQBE1h@k0u
public class HeapSort implements SortUtil.Sort{ ~^bf1W[
BdrYc^?JL]
/* (non-Javadoc) (<2!^v0.M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y!8m7a
*/ E(F?o.b
public void sort(int[] data) { jP#I](\eG
MaxHeap h=new MaxHeap(); `*WzHDv5p
h.init(data); IY hwFw 5O
for(int i=0;i h.remove(); hx!:F"#
System.arraycopy(h.queue,1,data,0,data.length); .cm9&&"Z
} o-<XR9,N*
&'k:?@J[
private static class MaxHeap{ 6<fcG
\1sWmN6
void init(int[] data){ n"w>Y)C(X)
this.queue=new int[data.length+1]; 0YZ66VN!
for(int i=0;i queue[++size]=data; :{,k F
fixUp(size); cs9"0&JX
} ioBYxbY`
} ^+w1:C5
3tW}a`z9
private int size=0; ivg W[]
''($E/
private int[] queue; xwub-yz
RK/>5
public int get() { Vkfc&+
return queue[1]; OP|X-
} b,x$wP+
b#-=Dbe
public void remove() { E|3[$?=R
SortUtil.swap(queue,1,size--); / hg)=p
fixDown(1); @HE<\Z{ KI
} .P#t"oW}
file://fixdown uuQsK. S
private void fixDown(int k) { _ h/:r1
int j; =)}Yw)
while ((j = k << 1) <= size) { j-d542"
if (j < size %26amp;%26amp; queue[j] j++; woa|h"T
if (queue[k]>queue[j]) file://不用交换 %Z8wUG
break; T|p%4hH
SortUtil.swap(queue,j,k); r6&+pSA>
k = j; @^%YOorr
} g_@b- :$Yq
} h.\p+Qw.
private void fixUp(int k) { a4XK.[O
while (k > 1) { MoXai0d%
int j = k >> 1; jX.'G
if (queue[j]>queue[k]) YZAQt*x
break; +TAyCxfmt
SortUtil.swap(queue,j,k); ]c1#_MW
k = j; kzVK%[/
} wlQ @3RN>
} p+228K ;H
.l,]yWwfK
} =QIu3%&
*x_e] /}
} )X3 |[4R
]@m`bs_6
SortUtil： #\ECQF
7Y)i>[u3
package org.rut.util.algorithm; V/xjI<,
0+K<;5"63d
import org.rut.util.algorithm.support.BubbleSort; `a[ V_4wO
import org.rut.util.algorithm.support.HeapSort; ;Fd1:"1pP
import org.rut.util.algorithm.support.ImprovedMergeSort; /8 yv8
import org.rut.util.algorithm.support.ImprovedQuickSort; *TrpW?]Y&
import org.rut.util.algorithm.support.InsertSort; J3XG?' }
import org.rut.util.algorithm.support.MergeSort; MAp#1+k
import org.rut.util.algorithm.support.QuickSort; ..x2
import org.rut.util.algorithm.support.SelectionSort; P'<j<h6
import org.rut.util.algorithm.support.ShellSort; nt@uVwfQ
N;DE,[:<
/** G^Y^)pc]
* @author treeroot )LsUO#%DO
* @since 2006-2-2 *to#ZMR;!
* @version 1.0 i*8j|
*/ ]f5vk
public class SortUtil { K+d{R=s^
public final static int INSERT = 1; (:^YfG~e
public final static int BUBBLE = 2; {P3gMv;
public final static int SELECTION = 3; (Q.tH
public final static int SHELL = 4; sX]gL
public final static int QUICK = 5; K"!U&`T
public final static int IMPROVED_QUICK = 6; t qUBl?i
public final static int MERGE = 7; 8g=];@z
public final static int IMPROVED_MERGE = 8; cG(%P$
public final static int HEAP = 9; zcuz @
{b-SK5%]L
public static void sort(int[] data) { nkz<t
sort(data, IMPROVED_QUICK); xVrLoAw
} ]z2x`P^oI
private static String[] name={ 2&=CC4<!d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %q.5;L
}; |[p]]) o
B`w8d[cL7
private static Sort[] impl=new Sort[]{ a|DCpU}
new InsertSort(), t*fH&8(
new BubbleSort(), 3EH@tlTl
new SelectionSort(), qW /&.
new ShellSort(), Nrq/Pkmy
new QuickSort(), A"0Yn(awWu
new ImprovedQuickSort(), D~TlG@Pq
new MergeSort(), v?}rA%so
new ImprovedMergeSort(), ,Xg^rV~]
new HeapSort() (,|eE)+
}; Bc`L]<
a'?LC)^
public static String toString(int algorithm){ UR(i_T&w
return name[algorithm-1]; t0za%q!fK<
} xiL+s-
sGh TP/
public static void sort(int[] data, int algorithm) { JxKd
impl[algorithm-1].sort(data); /8u}VYE
} :H#D4O8UiH
"yl6WG#J
public static interface Sort { >jnx2$
public void sort(int[] data); :;IZ|hU
} "Z~@"JLb%
t3*.Bm:^
public static void swap(int[] data, int i, int j) { }2^qM^,0
int temp = data; We*uZ?+
data = data[j]; $@w,9J\
data[j] = temp; ^E)8Sb9t
} Galh _;=
} oTr,zRL