[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; ][rTQt m
} e7hO;=?b'
int i1=l; tbRE/L<
int i2=mid+1; SDJ;*s-
for(int cur=l;cur<=r;cur++){ eTT^KqE>&
if(i1==mid+1) $ #t|(\
data[cur]=temp[i2++]; XzN-slu!
else if(i2>r) xf[zEEt
data[cur]=temp[i1++]; @qpYDnJ:
else if(temp[i1] data[cur]=temp[i1++]; JYl\<Z' {
else ,Os7T 1>
data[cur]=temp[i2++]; O'@m4@L
} 0\ZaMu #
} oFwG+W/
widI s[ )
} nxf{PbHk
;4R=eI
改进后的归并排序: n8 GF8a
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package org.rut.util.algorithm.support; EK:Y2WZ
p5D5%B/
import org.rut.util.algorithm.SortUtil; IMw "eV
oMz/sL'u
/** 5_PWGaQa
* @author treeroot @yCW8]
* @since 2006-2-2 P7cge
* @version 1.0 ;!^ +N
*/ ./';P<)
public class ImprovedMergeSort implements SortUtil.Sort { (v|ixa
- a
private static final int THRESHOLD = 10; CL EpB2_
)#)nBM2\
/* V>1D1
* (non-Javadoc) y4 dp1<t%
* kT>r<`rt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J&n ^y
*/ 9$:QLE+t
public void sort(int[] data) { -MQZiq7H4
int[] temp=new int[data.length]; @*bvMEE
mergeSort(data,temp,0,data.length-1); ,*q#qW!!
} :,urb*
[vZfH!vLP
private void mergeSort(int[] data, int[] temp, int l, int r) { 0~(\lkh*!9
int i, j, k; &NlS =
int mid = (l + r) / 2; wxH(&CB-{
if (l == r) -B<O_*wOj
return; DN4fP-m-
if ((mid - l) >= THRESHOLD) E~rs11
mergeSort(data, temp, l, mid); :5$xh
else ( [K2:n\
insertSort(data, l, mid - l + 1); oqm
if ((r - mid) > THRESHOLD) bnAT,v{
mergeSort(data, temp, mid + 1, r); `wP/Zp{Hy
else <GbnPG?
insertSort(data, mid + 1, r - mid); W?SP .-I
HVtr,jg
for (i = l; i <= mid; i++) { R-=_z6<
temp = data; E1$Hu{
} 5xG|35Pj
for (j = 1; j <= r - mid; j++) { M"k3zK,
temp[r - j + 1] = data[j + mid]; Y\+(rC27
} # q0Ub-
int a = temp[l]; 7}2sIf[I
int b = temp[r]; Dq0-Kf,^
for (i = l, j = r, k = l; k <= r; k++) { bd@*vu}?}
if (a < b) { %s~NQ;Y
data[k] = temp[i++]; N1D6D$s0
a = temp; ORV}j,Ym
} else { V%X:1 8j
data[k] = temp[j--]; c^i"}2+
b = temp[j]; 3bT6W,J4T
} [[";1l
} ;zfQ3$@9
} < fojX\}3
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/** ZXFAuF
* @param data &:!ZT=
* @param l &4w\6IR
* @param i Verbmeg&n
*/ GnSgO-$"
private void insertSort(int[] data, int start, int len) { { r<(t#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W\ 1bE(AwZ
} o<C]+Nt,@
} |_hioMVz
} ~ LJ>WA
} !=~s/{$PE
.}L-c>o"o
堆排序： &cv@Kihq(
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package org.rut.util.algorithm.support; *`@XKK
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import org.rut.util.algorithm.SortUtil; 0%GqCg
CjC'"+[w
/** p=mCK@
* @author treeroot v!pj v%
* @since 2006-2-2 l|R<F;|
* @version 1.0 N$=(1`zM=
*/ ;~'cITL
public class HeapSort implements SortUtil.Sort{ 7G<KrKal
I]uOMWZs
/* (non-Javadoc) + d+hvwEM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5 WN`8?
*/ . Ce&9l
public void sort(int[] data) { }skRlC
MaxHeap h=new MaxHeap(); m>Yo9/XpZ
h.init(data); 7dM6;`V^
for(int i=0;i h.remove(); 1_33;gP
System.arraycopy(h.queue,1,data,0,data.length); '[M^f+H|
} H|rX$P
uu WY4j6
private static class MaxHeap{ K$37}S5
o+"0.B
void init(int[] data){ t?du+:
this.queue=new int[data.length+1]; `wn<3#
for(int i=0;i queue[++size]=data; 0i5T] )r
fixUp(size); a=:{{\1o
} 5vUz
} |1<]o;:
xzMeKC`
private int size=0; > hDsm;,/
K#JabT
private int[] queue; Cu ['&_@
+qh< Fj>
public int get() { !BvTJ-e)F
return queue[1]; ,E/Y@sajn+
} r{/ G\
(_i vN
public void remove() { _v~D{H&}
SortUtil.swap(queue,1,size--); ')~Y
fixDown(1); M<#)D
} q5'yD;[hE
file://fixdown `lu"yF
private void fixDown(int k) { 8XS{6<
int j; w$(0V$l_
while ((j = k << 1) <= size) { c5wkzY h
if (j < size %26amp;%26amp; queue[j] j++; 'Tru?y\
if (queue[k]>queue[j]) file://不用交换 YP$*;l
break; |;U}'|6
SortUtil.swap(queue,j,k); #^4>U&?
k = j; MW",r;l<aM
} #2lvfR|
} fbzKO^Ub
private void fixUp(int k) { UpszCY4
while (k > 1) { R+kZLOE
int j = k >> 1; )D"G3g.
if (queue[j]>queue[k]) NrI5uC7
break; xM'S ;Sg
SortUtil.swap(queue,j,k); N?2#YTjR
k = j; evg7d
} eF8aB?&"
} z|DA _dG
8[`^(O#\E
} +/~\b/
|peMr#
} z[|PsC3i:
|0%4Gk);
SortUtil： $!l2=^\3
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package org.rut.util.algorithm; rjpafGCp
ExOB P
import org.rut.util.algorithm.support.BubbleSort; ]"7DV3_
import org.rut.util.algorithm.support.HeapSort; yhkQFB%gv
import org.rut.util.algorithm.support.ImprovedMergeSort; _/sf@R
import org.rut.util.algorithm.support.ImprovedQuickSort; ?lET45'
import org.rut.util.algorithm.support.InsertSort; G2yUuyAZ
import org.rut.util.algorithm.support.MergeSort; "{ry 9?z
import org.rut.util.algorithm.support.QuickSort; rlO%%Qn`
import org.rut.util.algorithm.support.SelectionSort; Dt~}9HrU
import org.rut.util.algorithm.support.ShellSort; mBpsgm:g^
WRcFE<
/** `6BS-AVO7
* @author treeroot FbCZV3Y
* @since 2006-2-2 vN%j-'D\A4
* @version 1.0 'j"N2NJ
*/ P8,{k
public class SortUtil { 6JFDRsX>)?
public final static int INSERT = 1; Lx:N!RDw
public final static int BUBBLE = 2; lPFdQ8M
public final static int SELECTION = 3; (15Yw9Mv
public final static int SHELL = 4; YqY6\mo
public final static int QUICK = 5; jC Kt;lj
public final static int IMPROVED_QUICK = 6; q*y9/HnI
public final static int MERGE = 7; ]6VUqFO)
public final static int IMPROVED_MERGE = 8; t0V_ c'm
public final static int HEAP = 9; Q@ )rw0$
-g[*wN8
public static void sort(int[] data) { )[M<72
sort(data, IMPROVED_QUICK); *liPJ29C[
} 0h@%q;g
private static String[] name={ 0)`lx9&h
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #HnyE+tD
}; zIQc#F6\5
im?XXsH'
private static Sort[] impl=new Sort[]{ Bc|x:#`C\{
new InsertSort(), :56lzsWUE<
new BubbleSort(), 6pn@`UK
new SelectionSort(), WGG) mh&-
new ShellSort(), ^? {kj{v
new QuickSort(), A%m`LKV~@
new ImprovedQuickSort(), J,=E5T}U^
new MergeSort(), hTtp-e`
new ImprovedMergeSort(), ='bmjXu
new HeapSort() k+R?JWC:
}; x"wM_hl5L
\lbiz4^>
public static String toString(int algorithm){ \IZ4(Z
return name[algorithm-1]; Tvx8l m'
} (&]15 FJ$1
&G,o guo
public static void sort(int[] data, int algorithm) { {5tEsv
impl[algorithm-1].sort(data); / ?[gB:s
} wCTR-pL^
iBiA0 W
public static interface Sort { 5B.??;xtaV
public void sort(int[] data); W7[S7kd
} 7fzyD
oJ@PJvmR&a
public static void swap(int[] data, int i, int j) { 9]F&Fz/G
int temp = data; i+x6aQ24
data = data[j]; [ 6o:v8&3
data[j] = temp; q\HBAry
} 8}#Lo9:,d
} ylxfh(