[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; ~8`r.1aUO
} e_g7E+6
int i1=l; *M/3 1qI
int i2=mid+1; FlD !?
for(int cur=l;cur<=r;cur++){ & @^|=>L
if(i1==mid+1) DDN#w<#
data[cur]=temp[i2++]; 5Tb93Q@c
else if(i2>r) }OI;M^5L
data[cur]=temp[i1++]; Jnb>u*7,
else if(temp[i1] data[cur]=temp[i1++]; VZb0x)w
else l *yml
data[cur]=temp[i2++]; H~J#!3
} AmRppbj/wO
} Th`IpxV
oVb6,Pn
} ]^VC@$\)+
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改进后的归并排序: ~(-B%Az
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package org.rut.util.algorithm.support; vov"60K
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import org.rut.util.algorithm.SortUtil; 4tCyd5u a8
7>wSbAR<
/** 6Ei>VcN4a
* @author treeroot $?(fiFC
* @since 2006-2-2 ss236&
* @version 1.0 x76<u:
*/ '2/48j X5
public class ImprovedMergeSort implements SortUtil.Sort { H;G*tje/M
5=.,a5
private static final int THRESHOLD = 10; wB?;3lTS
7od!:<v/
/* {#zJx(2yG
* (non-Javadoc) <{3VK
* :I+%v
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fHb0pp\[.
*/ Y=x]'3}^
public void sort(int[] data) { }Wn6r_:
int[] temp=new int[data.length]; or]8;eQ?
mergeSort(data,temp,0,data.length-1); ?%iAkV
} &( b\jyf
f<!eJO:<'
private void mergeSort(int[] data, int[] temp, int l, int r) { C*/d%eHD
int i, j, k; n$axqvG
int mid = (l + r) / 2; PLw;9^<
if (l == r) p(v+j_ak
return; ^E{~{
if ((mid - l) >= THRESHOLD) w~;1R\?|
mergeSort(data, temp, l, mid); %=]~5a9
else Cc]t*;nU_
insertSort(data, l, mid - l + 1); 55zimv&DV
if ((r - mid) > THRESHOLD) 4Xe3PdE
mergeSort(data, temp, mid + 1, r); 'X<R)E
else 0KHA5dt
insertSort(data, mid + 1, r - mid); SE;Jl[PgcL
Z[FSy-;"
for (i = l; i <= mid; i++) { 3O:Z;YP:<
temp = data; UKZsq5Q
} {&4+W=0 n
for (j = 1; j <= r - mid; j++) { R% l=NHB}
temp[r - j + 1] = data[j + mid]; = =cAL"Z
} 8qrE<RHU@
int a = temp[l]; 4@4$kro
int b = temp[r]; %_(e{Mf)
for (i = l, j = r, k = l; k <= r; k++) { k,0JW=Vh>|
if (a < b) { cIw)ScY
data[k] = temp[i++]; Ih{(d O;
a = temp; |*fGG?}
} else { H8mmmt6g
data[k] = temp[j--]; J3oH^
b = temp[j]; u0A.I_
} TC<_I0jCh
} y7u"a)T
} =BMON{K
]pzf{8%
/** f]qPxRw
* @param data {3i.U028]
* @param l 0AZ Vc
* @param i ido'<;4>
*/ ?N~rms e
private void insertSort(int[] data, int start, int len) { ~Ub'5M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~N;kF.q&>&
} y['$^T?oP
} {uM*.]
} jri=UGf
} gH,^XZe
P@`@?kMU
堆排序： kbN2dL
w+fsw@dK&
package org.rut.util.algorithm.support; 4@u*#Bp`|
Ty}'A(U
import org.rut.util.algorithm.SortUtil; %|I~8>m
N8@Fj!Zi
/** ==RYf*d
* @author treeroot ~dkS-6q~Q
* @since 2006-2-2 Z]@my,+Z;
* @version 1.0 ey_3ah3x
*/ ,ZHIXylZ
public class HeapSort implements SortUtil.Sort{ 7YV}F9h4
rUc2'Ct
/* (non-Javadoc) (OLjE]9;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4[44Eku\
*/ _s[ohMlh
public void sort(int[] data) { u3a"[DB9c
MaxHeap h=new MaxHeap(); ?xWO>#/
h.init(data); ': 87.8$
for(int i=0;i h.remove(); o+*YX!]#L
System.arraycopy(h.queue,1,data,0,data.length); p`fUpARA!
} F/tGk9v
bX Q*d_]WT
private static class MaxHeap{ W;4rhZEgd
}R=n!Y$F
void init(int[] data){ c$Z3P%aP'V
this.queue=new int[data.length+1]; b(Zh$86
for(int i=0;i queue[++size]=data; fa//~$#"{L
fixUp(size); 6ey{+8
} b}HLuX
} )\s{\u \
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private int size=0; g`i?]6c}jt
;.Zgt8/.
private int[] queue; n0bm 'qw
Hz) Xn\x
public int get() { 7hQXGY,q
return queue[1]; {0RwjPYp
} mEeD[dMN
0/5 a3-3{
public void remove() { Xia4I* *
SortUtil.swap(queue,1,size--); aZn]8jC%
fixDown(1); <tXk\cOg
} RL4J{4K
file://fixdown <'N"GLJ
private void fixDown(int k) { i/E"E7
int j; Y)H~*-vGu
while ((j = k << 1) <= size) { H(Pzo+k*
if (j < size %26amp;%26amp; queue[j] j++; `fMdO
if (queue[k]>queue[j]) file://不用交换 aO)Cq5
break; [U'I3x,
SortUtil.swap(queue,j,k); f8E,.$>
k = j; iY?J3nxD-:
} f@yInIzRJ
} WVyk?SBw
private void fixUp(int k) { _zt)c!
while (k > 1) { OIJNOuI
int j = k >> 1; PgIH(
if (queue[j]>queue[k]) Iz^h| n
break; 6i'GM`>w
SortUtil.swap(queue,j,k); o1lhVM`15
k = j; ;O8'vp
} O/Cwm;&t
} |`eHUtjH
zW#P ~zS
} ZZq]I
O:%s;p 5
} !-rG1VI_S*
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SortUtil： y/i{6P2`,D
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package org.rut.util.algorithm; c(Ws3
?, B4
import org.rut.util.algorithm.support.BubbleSort; K Q^CiX
import org.rut.util.algorithm.support.HeapSort; lldNIL6B%
import org.rut.util.algorithm.support.ImprovedMergeSort; M5 \flE2
import org.rut.util.algorithm.support.ImprovedQuickSort; C- 5QhD
import org.rut.util.algorithm.support.InsertSort; !=Scpo_
import org.rut.util.algorithm.support.MergeSort; Qe4O N3X!
import org.rut.util.algorithm.support.QuickSort; Rax]svc
import org.rut.util.algorithm.support.SelectionSort; {z#!3a
import org.rut.util.algorithm.support.ShellSort; g$f+X~Q
R*0]*\C z
/** 7<GC{/^T
* @author treeroot | KtI:n4d
* @since 2006-2-2 IVSOSl|
* @version 1.0 C(CwsdlP
*/ UOIB}ut V
public class SortUtil { 56w uk [)
public final static int INSERT = 1; W{A4*{
public final static int BUBBLE = 2; ^+p7\D/E(
public final static int SELECTION = 3; MHj RPh
public final static int SHELL = 4; 6a}
public final static int QUICK = 5; GHNw.<`l?
public final static int IMPROVED_QUICK = 6; }fO+b5U
public final static int MERGE = 7; #ZkT![`
public final static int IMPROVED_MERGE = 8; Upw`|$1S
public final static int HEAP = 9; 0\zY?UUww
)DB\du
public static void sort(int[] data) { BTc }Kfae
sort(data, IMPROVED_QUICK); 9*Q6/?v
} 9$k0
private static String[] name={ =E.!Ff4~(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" MB7`'W
}; ~Uw;6VXV1
y>^FKN/
private static Sort[] impl=new Sort[]{ 7+9o<j@@o
new InsertSort(), HK NT. a
new BubbleSort(), gFpub_
new SelectionSort(), "?%2`*\
new ShellSort(), TB}6iIe
new QuickSort(), 'uC=xG.*}
new ImprovedQuickSort(), @eJ6UML"
new MergeSort(), w**~k]In
new ImprovedMergeSort(), 3D;?X@
new HeapSort() t)|~8xpP
}; <@Z`<T6
R1$s1@3I|
public static String toString(int algorithm){ E$.fAIt
return name[algorithm-1]; UpaF>,kM
} `L LS|S]
\VpN:RI
public static void sort(int[] data, int algorithm) { }7*|s+F(f
impl[algorithm-1].sort(data); S=}1k,I
} _?>x{![
!He_f-eZ
public static interface Sort { j"hNkCF
public void sort(int[] data); dBw7l}
} dd=ca0c7e
a[Nm< qV05
public static void swap(int[] data, int i, int j) { =MU(!`
int temp = data; ]ur?i{S,
data = data[j]; {p.^E5&
data[j] = temp; %nRgHN>
} b)eoFc)lc
} 1etT."