[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; uM'n4oH
} k+[oYd
int i1=l; uy2~<)
int i2=mid+1; =C$"e4%Be
for(int cur=l;cur<=r;cur++){ TXYO{
if(i1==mid+1) ,k.")
data[cur]=temp[i2++]; uDG>m7(}/h
else if(i2>r) rhOxyY0
data[cur]=temp[i1++]; 7p'pz8n`X
else if(temp[i1] data[cur]=temp[i1++]; Hj`'4
else |^Yz*r?BJ
data[cur]=temp[i2++]; \'g7oV;>cI
} yT<"?S>D
} ,^ ,R .T
u)EtEl7Wq
} N4qBCBr(
U7U&^s6`
改进后的归并排序: Edc3YSg%;
}Uj-R3]}K
package org.rut.util.algorithm.support; Vq#0MY)2gS
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import org.rut.util.algorithm.SortUtil; SefF Ci%4
xv>8rW(Np5
/** )RFY2}
* @author treeroot |2TH[J_a
* @since 2006-2-2 {pXX%>
* @version 1.0 G?~Yw'R^8
*/ 4j+M<g
public class ImprovedMergeSort implements SortUtil.Sort { !+Cc^{
Tl"r#
private static final int THRESHOLD = 10; $5ea[nc
<aFB&Fm
/* `:ZaT('h
* (non-Javadoc) fi'zk
* ;O>zA]Z8r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p;zT #%
*/ Ao\OU}
public void sort(int[] data) { DcRoW
int[] temp=new int[data.length]; &`!H1E^
mergeSort(data,temp,0,data.length-1); FS)C<T]t
} ooa"Th<
6R3/"&P(/#
private void mergeSort(int[] data, int[] temp, int l, int r) { P"Q6wdm
int i, j, k; w?fq%-6f*
int mid = (l + r) / 2; %Y.@AiViz
if (l == r) _Nz?fJ:$@
return; g("[wqgG
if ((mid - l) >= THRESHOLD) n[a%*i6x
mergeSort(data, temp, l, mid); k^q~2
else T.{]t6t$U
insertSort(data, l, mid - l + 1); +:C.G[+
if ((r - mid) > THRESHOLD) Ly`.~t(~l
mergeSort(data, temp, mid + 1, r); gi_f8RP=2a
else K.?S,qg
insertSort(data, mid + 1, r - mid); ? R[GSS1
PM:u~D$Jd
for (i = l; i <= mid; i++) { D_z&G)
temp = data; Y!u">M#@
} T-oUcuQB
for (j = 1; j <= r - mid; j++) { maQDD*
temp[r - j + 1] = data[j + mid]; {oo(HD;5
} Hnvs{KC`
int a = temp[l]; ?[5_/0L,=
int b = temp[r]; cKwmtmwB
for (i = l, j = r, k = l; k <= r; k++) { Hs.5@l
if (a < b) { ,I f9w$(z
data[k] = temp[i++]; sPX~>8}|VP
a = temp; VRv.H8^{
} else { ]>(pQD
data[k] = temp[j--]; UPuG&A#VV
b = temp[j]; RDqQ6(e"
} $4CsiZ6
} ]A_A4=[w
} 2+\@0j[q
f1Gyl
/** Zr!CT5C5
* @param data w4uY/!~k
* @param l N?s5h?
* @param i ALR`z~1
*/ C #@5:$
private void insertSort(int[] data, int start, int len) { S#ud<=@!9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2s`~<EF N
} _7-P8"m
} <;E>1*K}8
} aD?ySc}
} KSl@V>!_
^;mGOjS
堆排序： G]>P!]
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package org.rut.util.algorithm.support; V34]5
Dj{t[z]$k
import org.rut.util.algorithm.SortUtil; IlP@a[:_
oIY@xuj
/** [JX=<a)U
* @author treeroot ]0@ J)Z09
* @since 2006-2-2 - z"D_5
* @version 1.0 G2_l}q~
*/ q+Qrc]>-f
public class HeapSort implements SortUtil.Sort{ )@.6u9\
T#G (&0J5
/* (non-Javadoc) P'CDV3+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0%hOB:
*/ ]g0\3A
public void sort(int[] data) { <-a6'g2y
MaxHeap h=new MaxHeap(); 75#&hi/~
h.init(data); 6 g`Y~ii
for(int i=0;i h.remove(); &H@OLyC
System.arraycopy(h.queue,1,data,0,data.length); /M8&`
} E6y ?DXWH
/N(Ol WEp
private static class MaxHeap{ O'<cEv'B*
J |TA12s
void init(int[] data){ =L?(mNHT
this.queue=new int[data.length+1]; Sg}]5Mn`
for(int i=0;i queue[++size]=data; C Ejf&n
fixUp(size); =WP`i29j9}
} `}9jvR5
} hA_Y@&=W
} h0 )
private int size=0; LZG~1tf
vT>ki0P_;
private int[] queue; X$4 5<oz
/iekww^54
public int get() { C 9:5c@G
return queue[1]; 6S2v3
} .TTXg,8#D
?~>#(Q
public void remove() { ]ZOzqh_0C
SortUtil.swap(queue,1,size--); &7\q1X&Rr
fixDown(1); *q.qO )X}3
} OAiip,
file://fixdown D.\s mk
private void fixDown(int k) { Nn;p1n dN
int j; Q]}aZ4L
while ((j = k << 1) <= size) { $'2yPoR
if (j < size %26amp;%26amp; queue[j] j++; Gf{FFIe(
if (queue[k]>queue[j]) file://不用交换 L:g!f
break; ^SouA[
SortUtil.swap(queue,j,k); 9"YOj_z
k = j; wKq-|yf,
} P|OjtI
} ,\BGxGNAmV
private void fixUp(int k) { HjO-6F#s
while (k > 1) { )./%/ _*K
int j = k >> 1; i$A0_ZJKjZ
if (queue[j]>queue[k]) z5G$'
break; KF"&9nB
SortUtil.swap(queue,j,k); *y;(c)_w/%
k = j; J\@yP
} 3UBg"1IC
} iS{8cN3R
tDl1UX
} }!-K)j.
<XV\8Y+n
} p-=+i
|X6]#&g7
SortUtil： /OpVr15
S;vE%
package org.rut.util.algorithm; {/x["2a1
fBptjt_
import org.rut.util.algorithm.support.BubbleSort; XujVOf
import org.rut.util.algorithm.support.HeapSort; ?2b*FQe
import org.rut.util.algorithm.support.ImprovedMergeSort; rH9wRY(
import org.rut.util.algorithm.support.ImprovedQuickSort; +K3SAGm
import org.rut.util.algorithm.support.InsertSort; {o?+T);Z
import org.rut.util.algorithm.support.MergeSort; a_UVb'z
import org.rut.util.algorithm.support.QuickSort; 6[<*C?
import org.rut.util.algorithm.support.SelectionSort; 6O^'J~wiI
import org.rut.util.algorithm.support.ShellSort; 2\xv Yf-
*;~*S4/P
/** &J)q_Z8
* @author treeroot LCrE1Q%VP
* @since 2006-2-2 w !N;Y0
* @version 1.0 5YlY=J
*/ q][{?
public class SortUtil { kMGK8y
public final static int INSERT = 1; :&#HrD[KT
public final static int BUBBLE = 2; k\T,CZ<
public final static int SELECTION = 3; tdTD!'
public final static int SHELL = 4; ;* vVucx
public final static int QUICK = 5; GbC-6.~
public final static int IMPROVED_QUICK = 6; '2u(fLq3h
public final static int MERGE = 7; =(f+geA"hm
public final static int IMPROVED_MERGE = 8; 47R4gs#W
public final static int HEAP = 9; I*/?*p/I
&C eG4_Mi
public static void sort(int[] data) { pSQ)DqW
sort(data, IMPROVED_QUICK); ?*}^xXI/
} WxE4r
private static String[] name={ <_HK@E<_HO
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N;XaK+_2F
}; ,~ D_T
x.rOP_rs
private static Sort[] impl=new Sort[]{ mC P*v-
new InsertSort(), ;\@co5.=
new BubbleSort(), 3:Aw.-,i\
new SelectionSort(), 'iM;e K
new ShellSort(), 8Wn;U!qT
new QuickSort(), (U"Ub;[7
new ImprovedQuickSort(), z~TG~_s
new MergeSort(), {Mc^[}9
new ImprovedMergeSort(), ~n:dHK`
new HeapSort() &Q>)3]|p
}; RbUhLcG5
5"4O_JQ
public static String toString(int algorithm){ Y6T1_XG
return name[algorithm-1]; <}~`YU>=v
} H6ff b)&
8r^~`rL
public static void sort(int[] data, int algorithm) { Mp=2}d%P
impl[algorithm-1].sort(data); Oj<.3U[C
} wYtL1D(
<qD/ #$
public static interface Sort { ITj0u&H:
public void sort(int[] data); zGrUl|j
} [#y/`
o9)pOwk7;
public static void swap(int[] data, int i, int j) { E DuLgg@
int temp = data; 14TA( v]T
data = data[j]; 90)0\i+P
data[j] = temp; {C>.fg%t
} PI>PEge!&
} $x,?+N