[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; 1>*]jj}
} >5Zpx8W
int i1=l; ~^.&nph
int i2=mid+1; QD:0iD?
for(int cur=l;cur<=r;cur++){ xLZQ\2q
if(i1==mid+1) lxK_+fj q
data[cur]=temp[i2++]; g[;iVX^1&
else if(i2>r) \2<2&=h?
data[cur]=temp[i1++]; ISr~JQr
else if(temp[i1] data[cur]=temp[i1++]; r1FE$R~C=
else 5Ag>,>kJ6
data[cur]=temp[i2++]; Xl6)&
} 4[3T%jA
} @2_s;!K
+k"dN^K]D
} $Yz &x%Lb
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改进后的归并排序: kXC.rgal
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package org.rut.util.algorithm.support; b,a\`%m}
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import org.rut.util.algorithm.SortUtil; yT&bS\
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/** ^BM/K&7^
* @author treeroot %:o@IRTRU
* @since 2006-2-2 +^+wS`Y
* @version 1.0 (W/jkm
*/ DuvP3(K
public class ImprovedMergeSort implements SortUtil.Sort { U30)r+&
BHmA*3?
private static final int THRESHOLD = 10; ~rCnST
n@L!{zY
/* l7{hq}@;cC
* (non-Javadoc) +>qBK}`
* "tIf$z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /^[)JbgB
*/ LO61J_J<
public void sort(int[] data) { &SN$D5U'
int[] temp=new int[data.length]; d L%E0o
mergeSort(data,temp,0,data.length-1); i`]M2Q
} ,:\2Lf
*Kzs(O
private void mergeSort(int[] data, int[] temp, int l, int r) { r-YQsu&
int i, j, k; Vd<= y
int mid = (l + r) / 2; [bPE?_a,
if (l == r) \Di~DN1
return; pjj 5
if ((mid - l) >= THRESHOLD) G^mk<pH
mergeSort(data, temp, l, mid); J+*rjdI
else 6 qKIz{;
insertSort(data, l, mid - l + 1); !v;r3*#Nky
if ((r - mid) > THRESHOLD) %yw*!A1
mergeSort(data, temp, mid + 1, r); Sw1]]-Es
else N~>?w#?J
insertSort(data, mid + 1, r - mid); CJKH"'u3^
Z `\7B e
for (i = l; i <= mid; i++) { ^}1RDdQ"U
temp = data; oh@r0`J]x
} 3`9*Hoy0c
for (j = 1; j <= r - mid; j++) { PYHm6'5BtB
temp[r - j + 1] = data[j + mid]; $PS5xD~@
} b"FsT
int a = temp[l]; yL Q&<\
int b = temp[r]; <Z8] W1)
for (i = l, j = r, k = l; k <= r; k++) { 8]?1gDS|9O
if (a < b) { d7^XP
data[k] = temp[i++]; f[}SS]d:E
a = temp; @$+[IiP
} else { ?ha}&##
data[k] = temp[j--]; : m5u=:t
b = temp[j]; EhFhL4Xdn
} 93WYZNpX
} Ba+OoS
} BWPYHWW}E
NUnP'X=J,
/** a+~o: 5
* @param data lwg.'<
* @param l ;W+-x]O
* @param i Z],"<[E
*/ _5m }g!
private void insertSort(int[] data, int start, int len) { 4P~<_]yf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); \~)573'
} GO)rpk9
} /MU<)[*Ro
} >(*jbL]p
} Fp]8f&l8
-.*\J|S@g
堆排序： M<p)@p
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package org.rut.util.algorithm.support; p 5o;Rvr
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import org.rut.util.algorithm.SortUtil; Q~@8t"P
9bNIaC*M
/** cY"^3Ot%^
* @author treeroot *tO<wp&
* @since 2006-2-2 B)Q'a3d#
* @version 1.0 (;j7{(
*/ @iP6N
public class HeapSort implements SortUtil.Sort{ hrL<jcv|
_N:h&uw
/* (non-Javadoc) 4By-+C*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _[phs06A
*/ eLYFd,?9
public void sort(int[] data) { YQ)m?=+J
MaxHeap h=new MaxHeap(); ~/x42|t
h.init(data); P&tK}Se^V
for(int i=0;i h.remove(); )g --=w3
System.arraycopy(h.queue,1,data,0,data.length); aOD"z7}U
} Ax^'unfQ:
Ji!-G4.n"
private static class MaxHeap{ ^"l$p,P+
Qm.kXlsDI
void init(int[] data){ 0\#Q;Z2
this.queue=new int[data.length+1]; % *G)*n
for(int i=0;i queue[++size]=data; lewDR"0Kx
fixUp(size); 'AAY!{>
} f5a](&
} Fq9[:
9vbh5xX
private int size=0; 7xc<vl#:q7
Xdq, =;
private int[] queue; *YtNt5u
UH.cn|R
public int get() { bevT`D
return queue[1]; }m H>lN
} Vw*x3>`
Ax0,7,8y
public void remove() { W*<]`U_.
SortUtil.swap(queue,1,size--); <C$<(Dw5
fixDown(1); jyGVbno`
} 2 QmUg
file://fixdown }SV3PdE
private void fixDown(int k) { v/czW\z
int j; fI1;&{f
while ((j = k << 1) <= size) { DOerSh_0W
if (j < size %26amp;%26amp; queue[j] j++; zFtGc
if (queue[k]>queue[j]) file://不用交换 OVyy}1Hx
break; 88>Uu!M=f
SortUtil.swap(queue,j,k); Z~(XyaN
k = j; JLu0;XVK
} Ln_l>X6j51
} j1F+,
private void fixUp(int k) { _")h %)f
while (k > 1) { |&Pl4P
int j = k >> 1; OD]J@m
if (queue[j]>queue[k]) "AouiZkh
break; a+/|O*>#
SortUtil.swap(queue,j,k); X6.O;
k = j; :xPvEK[B7
} uB1!*S1f
} C.E>)
{{3H\ rR
} S7a6ntei
C):d9OI?
} @(c<av?
@S7=6RKa[
SortUtil： =BS'oBn^6
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package org.rut.util.algorithm; F?} *ovy
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import org.rut.util.algorithm.support.BubbleSort; UWp8I)p!\O
import org.rut.util.algorithm.support.HeapSort; l _O~v?
import org.rut.util.algorithm.support.ImprovedMergeSort; DH9?2)aR
import org.rut.util.algorithm.support.ImprovedQuickSort; ~Ls I<z
import org.rut.util.algorithm.support.InsertSort; -^H5z+"^
import org.rut.util.algorithm.support.MergeSort; ~{YgM/c|dt
import org.rut.util.algorithm.support.QuickSort; :WIf$P?X
import org.rut.util.algorithm.support.SelectionSort; ZPsY0IzLo
import org.rut.util.algorithm.support.ShellSort; &t/<yq}{
9yo[T(8
/** <88}+j
* @author treeroot eH
* @since 2006-2-2 T(UYlLe
* @version 1.0 )95yV;n
*/ j{R|]SjW2H
public class SortUtil { 9!HMQ
public final static int INSERT = 1; Zfv(\SI
public final static int BUBBLE = 2; GFdJFQio
public final static int SELECTION = 3; sK-|xU.
public final static int SHELL = 4; jL+}F/~r
public final static int QUICK = 5; 'uACoME@
public final static int IMPROVED_QUICK = 6; hav?mnVJ
public final static int MERGE = 7; N#['fg'
public final static int IMPROVED_MERGE = 8; +N$7=oGC
public final static int HEAP = 9; /v)!m&6]>
}r~l72 `
public static void sort(int[] data) { 'Y{ux>
sort(data, IMPROVED_QUICK); wT~;tOw~
} ,DuZMGg
private static String[] name={ s<_LcQbt{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [RFK-E
}; ?VZXJO{^
qb>r\bc
private static Sort[] impl=new Sort[]{ }0*ra37z>
new InsertSort(), ilp;@O6
new BubbleSort(), 3ZL7N$N}7
new SelectionSort(), tW.>D;8
new ShellSort(), d)1sP0Z_@
new QuickSort(), 0 ,Qj:
new ImprovedQuickSort(), y?z_^ppj
new MergeSort(), gVA}?t;
new ImprovedMergeSort(), tD7C7m
new HeapSort() 8^/Ek<Qb|
}; O;BMwg_7
6a]f&={E
public static String toString(int algorithm){ oB06{/6
return name[algorithm-1]; 0/P-> n~
} bC4*w O
QGv:h[b_
public static void sort(int[] data, int algorithm) { B%rr}Ro1e
impl[algorithm-1].sort(data); H"GE\
} Sd$]b>b4O
5f&{!N
public static interface Sort { , HI%Xn
public void sort(int[] data); ym*#ZE`B!
} M |Q
2@m(XT (
public static void swap(int[] data, int i, int j) { -~O;tJF2
int temp = data; 9g&)6,<
data = data[j]; fo\J \
data[j] = temp; ?Y6la.bc{
} <x0uO
} F `pyhc>1;