[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; Di=9mHC
} ~fzuwz
int i1=l; dl l%4Sd
int i2=mid+1; noNm^hFL
for(int cur=l;cur<=r;cur++){ q]<xMg#nu
if(i1==mid+1) UP2.]B!d
data[cur]=temp[i2++]; */OI*{Q
else if(i2>r) %85Icg
data[cur]=temp[i1++]; W7UtA.2LT
else if(temp[i1] data[cur]=temp[i1++]; FA>1x*;c
else 6J%iZ
data[cur]=temp[i2++]; u/AT-er;
} |V`S>m%N
} Sl~x$9`
X QbNH~
} L2-^!'
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改进后的归并排序: (TSqc5^H
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package org.rut.util.algorithm.support; \&A+s4c")
w@]jpH;WX
import org.rut.util.algorithm.SortUtil; mVm4fHEYwU
'I/h(
/** hSqMaX%G
* @author treeroot 2HOe__Ns
* @since 2006-2-2 M?o{STt
* @version 1.0 FMu!z
*/ "dN< i
public class ImprovedMergeSort implements SortUtil.Sort { !Qu PG/=X
`?o=*OS7Y
private static final int THRESHOLD = 10; H`<?<ak6'M
sms1%%~
/* Li`hdrO'ii
* (non-Javadoc) ]TK=>;&
* 3n(*E_n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t]m!ee8*X<
*/ 02 f9 wV
public void sort(int[] data) { TGWdyIk
int[] temp=new int[data.length]; D6=HYqdj
mergeSort(data,temp,0,data.length-1); BpT"~4oV5
} qj?2%mK`
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private void mergeSort(int[] data, int[] temp, int l, int r) { c%<2z
int i, j, k; IUhp;iH
int mid = (l + r) / 2; (iDBhC;/B
if (l == r) b>q6:=((
return; 6S*zzJ.0K
if ((mid - l) >= THRESHOLD) zW'/2W.
mergeSort(data, temp, l, mid); 4DML
else b!~TAT&8
insertSort(data, l, mid - l + 1); *q"G }
if ((r - mid) > THRESHOLD) -qn[HXq
mergeSort(data, temp, mid + 1, r); ~%aJFs
else q]v,
insertSort(data, mid + 1, r - mid); aR(E7mXQ
&d 3HB=x
for (i = l; i <= mid; i++) { &|z544
temp = data; ag]*DsBt
} \8_V(lU
for (j = 1; j <= r - mid; j++) { ABWb>EZ8
temp[r - j + 1] = data[j + mid]; +rQg7a}
} URw!7bTz
int a = temp[l]; ZDlu1>Q
int b = temp[r]; 5LMj!)3
for (i = l, j = r, k = l; k <= r; k++) { !V(`ZH
if (a < b) { /Nqrvy=
data[k] = temp[i++]; OLFt;h
a = temp; ??TdrTS
} else { </w7W3F
data[k] = temp[j--]; y''0PSfb#
b = temp[j]; <lx^aakk!
} X\G)81Q.S
} wF;B@
} U(A4v0T
9 x [X<
/** LV=^jsQ5
* @param data -R@JIe_28f
* @param l ,^+#M{Z
* @param i 2E$i_jc
*/ s*{mT6s+T
private void insertSort(int[] data, int start, int len) { }B*,mn2N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9L=;KtE1
} |M _%QM.
} )=(n/vckM
} z[FI2jl
} 9d] tjT
T+BIy|O
堆排序： )v-Cj_W5]"
x#o?>5Qg?
package org.rut.util.algorithm.support; ;E2~L
(.oaMA"B
import org.rut.util.algorithm.SortUtil; [,\i[[<
?7rD42\8H
/** D3]@i&^B
* @author treeroot )T<D6l Lt
* @since 2006-2-2 ~"5C${~{
* @version 1.0 qV?sg
*/ 67ZYtA|t
public class HeapSort implements SortUtil.Sort{ v+7*R)/
9g+UJ\u^
/* (non-Javadoc) m\} =4b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !a)s`
*/ $*aE$O6l
public void sort(int[] data) { As p8qHS
MaxHeap h=new MaxHeap(); J{^n=X9M0J
h.init(data); q1<Fg.-r
for(int i=0;i h.remove(); o>$|SU!a
System.arraycopy(h.queue,1,data,0,data.length); 8q{1E];:q
} ${CYDD"mdy
%,Q;<axzi
private static class MaxHeap{ Yg|l?d"
$KH@,;Xz
void init(int[] data){ wC(XRqlE
this.queue=new int[data.length+1]; 0JrK/Ma3
for(int i=0;i queue[++size]=data; AAdD\%JZ
fixUp(size); _p$"NNFN
} HcDyD0;L.
} t0I>5#*WU
lxCX-a`@p
private int size=0; zv|M*Wu
b3P9Yoj-
private int[] queue; GW:\l~ d
8_+vb#M
public int get() { oFwG+W/
return queue[1]; ,?t}NZY&
} 1riBvBT
D@}St:m}
public void remove() { PGMv(}%;
SortUtil.swap(queue,1,size--); % Mw'e/?
fixDown(1); T&mbXMN
} e%'z=%(
file://fixdown vx PDC~3;
private void fixDown(int k) { #?A]v>I;C
int j; CF,8f$:2
while ((j = k << 1) <= size) { /bu'6/!`
if (j < size %26amp;%26amp; queue[j] j++; KuU3DTS85Z
if (queue[k]>queue[j]) file://不用交换 65;|cmjv
break; zuUQ."#i
SortUtil.swap(queue,j,k); `X3Xz!
k = j; X9DM^tt
} 0P3j+? N%
} 8H&_,;
private void fixUp(int k) { $hyqYp"/;
while (k > 1) { #?L(#a$k
int j = k >> 1; :,urb*
if (queue[j]>queue[k]) J2)-cY5G
break; #>MO]
SortUtil.swap(queue,j,k); 87&KQ_
k = j; 9k(*?!\;
} 3"HGEUqA
} )[e%wPu4e
Y]D7i?3N
} lNq:JVJ#\r
mOwWg
} !G+n"-h9'
}<6oFUZ
SortUtil： oV%( 37W9=
CsJ)Z%4_
package org.rut.util.algorithm; UY?i E=
#a|6Q 8
import org.rut.util.algorithm.support.BubbleSort; stf,<W
import org.rut.util.algorithm.support.HeapSort; "3U{h]
import org.rut.util.algorithm.support.ImprovedMergeSort; va`l*N5
import org.rut.util.algorithm.support.ImprovedQuickSort; Qx6,>'Qk'
import org.rut.util.algorithm.support.InsertSort; m1~qaD<DZ$
import org.rut.util.algorithm.support.MergeSort; ^8o_Iz)r,
import org.rut.util.algorithm.support.QuickSort; $[HcHnf
import org.rut.util.algorithm.support.SelectionSort; "N?%mCPI
import org.rut.util.algorithm.support.ShellSort; v>x {jZkFL
zhVa.r A
/** .g6PrhzFbk
* @author treeroot [4K9|/J
* @since 2006-2-2 $V`KrA~]
* @version 1.0 1YF+(fk
*/ ``2QOu 1
public class SortUtil { QN{}R;s
public final static int INSERT = 1; r`&2-]
public final static int BUBBLE = 2; p=mCK@
public final static int SELECTION = 3; RTgQ#<W8
public final static int SHELL = 4; d- Z+fz
public final static int QUICK = 5; I,CAFq
public final static int IMPROVED_QUICK = 6; 78^UgO/
public final static int MERGE = 7; Zq\RNZ}
public final static int IMPROVED_MERGE = 8; Z1)jRE2dl
public final static int HEAP = 9; z*NC?\
#Lhj0M;a
public static void sort(int[] data) { ;Sx'O
sort(data, IMPROVED_QUICK); Xh7~MU~X
} 'XZI{q2i
private static String[] name={ h a,=LV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" a=:{{\1o
}; }rj C_q
k *G!.
private static Sort[] impl=new Sort[]{ K#JabT
new InsertSort(), yKe*<\
new BubbleSort(), Kc2OLz#
new SelectionSort(), r{/ G\
new ShellSort(), /A[oj2un
new QuickSort(), [G'!`^V,
new ImprovedQuickSort(), <y\ Z#z
new MergeSort(), !%Hl#Pv}
new ImprovedMergeSort(), YvxMA#
new HeapSort() ^sf[dr;BA
}; YP$*;l
B:6sVJ
public static String toString(int algorithm){ #iRyjD
return name[algorithm-1]; !CVBG*E^l
} v8U1uOR,%
/BjGAa(
public static void sort(int[] data, int algorithm) { .5KC'?
impl[algorithm-1].sort(data); \AtwO
} U Qi^udGFD
z|DA _dG
public static interface Sort { }{kTh%^
public void sort(int[] data); |U#w?eE=
} fa+W9
Z$#ZYD
public static void swap(int[] data, int i, int j) { i_E#cU
int temp = data; ]"7DV3_
data = data[j]; e??{&[
data[j] = temp; LL$,<q%(P
} 4MtqQq4%
} io+7{B=u$