[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; I^NDJdxd
} !T6R[
int i1=l; Oa|c ?|+
int i2=mid+1; 9*qwXU_aV
for(int cur=l;cur<=r;cur++){ c=m'I>A
if(i1==mid+1) D#;7S'C
data[cur]=temp[i2++]; *2AD#yIKC
else if(i2>r) Pv -4psdw
data[cur]=temp[i1++]; FI.te3i?7
else if(temp[i1] data[cur]=temp[i1++]; O?uICnmi6
else 4~fYG|a
data[cur]=temp[i2++]; NL21se
} 5pQpzn=
} .. `I<2
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} Ailq,c
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改进后的归并排序: HC iRk1
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package org.rut.util.algorithm.support; uibmQ|AQ
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import org.rut.util.algorithm.SortUtil; 'l*X?ccKy
Q}BMvR 9w
/** z^bS+0S5x!
* @author treeroot VAPeMO ck
* @since 2006-2-2 U]PB)
* @version 1.0 !~#zd]0x;
*/ pH'_k k
public class ImprovedMergeSort implements SortUtil.Sort { ^<I(
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private static final int THRESHOLD = 10; @16GF!.
p9v:T1?
/* 7=-Yxt
* (non-Javadoc) 8>KUx]AN
* m:@y_:X0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )+.=z
*/ zPt<b!q
public void sort(int[] data) { Be6Yh~m
int[] temp=new int[data.length]; mU5Ox4>&9
mergeSort(data,temp,0,data.length-1); t.P@Ba^
} ,!orD1,'
yl[I'fX66
private void mergeSort(int[] data, int[] temp, int l, int r) { abo=v<mR
int i, j, k; .}IW!$ dq
int mid = (l + r) / 2; K[[~G1Z
if (l == r) |UTajEL
return; (W}F\P
if ((mid - l) >= THRESHOLD) WZQ2Mi<&1'
mergeSort(data, temp, l, mid); c'oiW)8;A
else X^\D"fmE.
insertSort(data, l, mid - l + 1); P6+ B!pY
if ((r - mid) > THRESHOLD) nI:M!j5s`
mergeSort(data, temp, mid + 1, r); 5(>=};r+
else -.Wcz|
insertSort(data, mid + 1, r - mid); nCQtn%j't
=%<=Bn
for (i = l; i <= mid; i++) { hGtz[u#p
temp = data; PR8nJts W5
} >|taU8^|G}
for (j = 1; j <= r - mid; j++) { *5)UIRd
temp[r - j + 1] = data[j + mid]; bP18w0>,
} ,`geOJn'
int a = temp[l]; s%)f<3=a
int b = temp[r]; ;Y7'U rn
for (i = l, j = r, k = l; k <= r; k++) { #Y7jNrxE
if (a < b) { '1mk;%
data[k] = temp[i++]; O= S[n
a = temp; VLXA6+
} else { ddQ+EY@!
data[k] = temp[j--]; k]m ~DVS
b = temp[j]; P$EiD+5#z
} jVff@)_S
} Kg%9&l
} P:{Aqn~zR
JduO^Fit
/** J"aw 1
* @param data ZHTi4JY
* @param l 1T!o`*
* @param i A \/~u"Y
*/ }0'LKwIR
private void insertSort(int[] data, int start, int len) { |]7c&`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); -1Q24jrO-
} Xm#W}Y'
} D{(}&8a9
} [F6)Z[uG
} +|/0sPW(
M%E<]H2;S
堆排序： M<-Q8a~
;,77|]<XE
package org.rut.util.algorithm.support; Oiib2Ov
#b^6>
import org.rut.util.algorithm.SortUtil; UarLxPQ
\F|)w|v
/** '+9<[]
* @author treeroot DzVCEhf
* @since 2006-2-2 VrIN.x
* @version 1.0 <^YvgQ,m
*/ Yq ]sPE92
public class HeapSort implements SortUtil.Sort{ 1jKpLTSs
^lp=4C9
/* (non-Javadoc) Q.N!b7r7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~.T|n =
*/ w)7y{ya$
public void sort(int[] data) { ;W- A2g
MaxHeap h=new MaxHeap(); 2 7)IfE
h.init(data); 505c(+
for(int i=0;i h.remove(); mG~kf]Y
System.arraycopy(h.queue,1,data,0,data.length); "rBB&l
} TAG@Ab
wV )\M]@
private static class MaxHeap{ Ph^1Ko"2
u+8"W[ZULq
void init(int[] data){ \,13mB6
this.queue=new int[data.length+1]; '8 .JnCg
for(int i=0;i queue[++size]=data; U'=8:&
fixUp(size); 7r;16"
} J4+K)gWB
} ;"M6}5dQ4
~vXbh(MX
private int size=0; 8dR `T}
8&JB_%Gb
private int[] queue; ny KfM5s_
Z@s[8wrmPl
public int get() { vn}m-U XA*
return queue[1]; {0,b[
} t?"(Zb
J%?5d:iN+
public void remove() { d5^^h<'
SortUtil.swap(queue,1,size--); 9"#C%~=+
fixDown(1); v~>Bbe
} k2 Ju*W&
file://fixdown UF-&L:s[
private void fixDown(int k) { v~SM"ky#
int j; Bz/ba *
while ((j = k << 1) <= size) { ~cc }yDe
if (j < size %26amp;%26amp; queue[j] j++; 4EM+Ye
if (queue[k]>queue[j]) file://不用交换 xt}.0dC!/%
break; O}i+1
SortUtil.swap(queue,j,k); _eGYwBm
k = j; C:Jfrg`
} YrnC'o`
} DgT]Nty@b
private void fixUp(int k) { 5Npxs&Ea
while (k > 1) { ]hV!lG1_
int j = k >> 1; UOb`@#
if (queue[j]>queue[k]) ]@ruizb8
break; 1^|#QMT
SortUtil.swap(queue,j,k); #1-WiweO
k = j; x+cL(R
} o8X_uKEI
} _0+X32HjJ
Q/g!h}>(.
} P")I)>Q6
t*hy"e{*a
} \ ku5%y
hJ(vDv%
SortUtil： <|l}@\iRX
'Q=;I
package org.rut.util.algorithm; uE.BB#
_M%>Qm
import org.rut.util.algorithm.support.BubbleSort; Z3&}C h
import org.rut.util.algorithm.support.HeapSort; wp@_4Iq1$
import org.rut.util.algorithm.support.ImprovedMergeSort; (iq>]-=<
import org.rut.util.algorithm.support.ImprovedQuickSort; 9s<4`oa
import org.rut.util.algorithm.support.InsertSort; Cn/WNCzst&
import org.rut.util.algorithm.support.MergeSort; %T]$kF++&
import org.rut.util.algorithm.support.QuickSort; 1 tOslP@
import org.rut.util.algorithm.support.SelectionSort; lU doMm
import org.rut.util.algorithm.support.ShellSort; WkXgz6 P
_tHhS@
/** Mz&/.A
* @author treeroot l:'#pZ4T
* @since 2006-2-2 0h A:=r
* @version 1.0 =.z;:0]'n
*/ >e {1e
public class SortUtil { q;,lv3I
public final static int INSERT = 1; bkd`7(r
public final static int BUBBLE = 2; u@dvFzc
public final static int SELECTION = 3; <<!fA><W
public final static int SHELL = 4; 9)7$UQY
public final static int QUICK = 5; AJ%E.+@=r
public final static int IMPROVED_QUICK = 6; "AUSgVE+h
public final static int MERGE = 7; u9~5U9]O%6
public final static int IMPROVED_MERGE = 8; A1/@KC"&{G
public final static int HEAP = 9; :&wb+tV
xnMcxys~
public static void sort(int[] data) { !64Tx
sort(data, IMPROVED_QUICK); 0Agse)
} <yipy[D
private static String[] name={ F ,472H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wPM&N@Pf
}; s)- ;74(
wj6u,+
private static Sort[] impl=new Sort[]{ Hk*1Wrs*
new InsertSort(), e' M&Eh
new BubbleSort(), KhND pwO"
new SelectionSort(), K.xABKPVc
new ShellSort(), y.lWyH9
new QuickSort(), d%|l)JF*5
new ImprovedQuickSort(), v82wnP-~7
new MergeSort(), =sk[I0W
new ImprovedMergeSort(), p XXf5adl<
new HeapSort() r>(,)rs(l
}; vS\2zwb}
yD~,+}0)
public static String toString(int algorithm){ $6Q^ur:
return name[algorithm-1]; mcQL>7ts
} VaD+:b4
_CHzwNU
public static void sort(int[] data, int algorithm) { AtJ{d^
impl[algorithm-1].sort(data); u79- B-YW^
} f(pq`v^-n
_e@8E6#ce
public static interface Sort { #VrIU8Q7'
public void sort(int[] data); I6 ?(@,
} B,\VLX
t}eyfflZ
public static void swap(int[] data, int i, int j) { %]Z4b;W[Y
int temp = data; '{AB{)1
data = data[j]; ~uc7R/3ss
data[j] = temp; qA GjR!=^
} w*6b%h%ww
} 74M9z