[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; w1G(s$;C
} dQ8RrD=$&
int i1=l; |4mvB2r
int i2=mid+1; fLe~X!#HF
for(int cur=l;cur<=r;cur++){ vntJe^IaFd
if(i1==mid+1) \!\:p/f
data[cur]=temp[i2++]; J|BElBY
else if(i2>r) zhw*Bed<
data[cur]=temp[i1++]; ~Y/A]N86,
else if(temp[i1] data[cur]=temp[i1++]; 6nk}k]Ji
else kK=VG< :M
data[cur]=temp[i2++]; 8QTry%
} ipn-HUrE@
} Be|! S_Y P
|Ml~Pmpp
} K(?V]Mxl6
9;L4\
改进后的归并排序: jOV6%
MZz9R*_VS
package org.rut.util.algorithm.support; G^ GIHdo
%f'pAc|#
import org.rut.util.algorithm.SortUtil; 5$=[x!x
9Q1%+zjjMq
/** #1%@R<`
* @author treeroot 6!]@S|vDX
* @since 2006-2-2 @m5J%8>k
* @version 1.0 6>)fNCe`
*/ aA4RC0'
public class ImprovedMergeSort implements SortUtil.Sort { j9k:!|(2'
%:~Ah6R1
private static final int THRESHOLD = 10; a Y)vi$;]
OH>.N"IG
/* }K)AjZ
* (non-Javadoc) TIJH}Ri
* QT+kCN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1vo3aF
*/ Hpix:To
public void sort(int[] data) { \Hp!NbnF$
int[] temp=new int[data.length]; T)e2IXGN
mergeSort(data,temp,0,data.length-1); !U?C_
} J~KO#`
.h <=C&Yg
private void mergeSort(int[] data, int[] temp, int l, int r) { 4vL\t uoz
int i, j, k; igQzL*X
int mid = (l + r) / 2; ,C6(
if (l == r) _t-6m2A
return; fL|9/sojz
if ((mid - l) >= THRESHOLD) drAJ-ii
mergeSort(data, temp, l, mid); -Cvd3%Jje
else Zw)=Y.y!
insertSort(data, l, mid - l + 1); UhJS=YvT
if ((r - mid) > THRESHOLD) 3_@IE2dA
mergeSort(data, temp, mid + 1, r); R>"pJbS;L
else ^JxVs 7
insertSort(data, mid + 1, r - mid); f=91 Z_M
J <z ^C
for (i = l; i <= mid; i++) { imADjBR]
temp = data; 06HU6d,
} b6S"&hs
for (j = 1; j <= r - mid; j++) { Srw`vql{(
temp[r - j + 1] = data[j + mid]; GdC=>\]
} \ 3E%6L
int a = temp[l]; lFuW8G,-f@
int b = temp[r]; c@,1?q1bv
for (i = l, j = r, k = l; k <= r; k++) { c k[uvH
if (a < b) { L__{U_p
data[k] = temp[i++]; gGNo!'o
a = temp; R}(Rv3>Xx
} else { WMKxGZg"
data[k] = temp[j--]; rk%pA-P2
b = temp[j]; ug}u>vQ>
} a:P+HU:
} 4NRj>y
} UK'8cz9
I5j|\ /Ht
/** lw8t#_P
* @param data <>5n;-
* @param l <b~~X`Z
* @param i 7&etnQJ{
*/ F+5 5p8
private void insertSort(int[] data, int start, int len) { kb$Yc)+R4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 43=)akJi
} OtAAzc!dQ
} Z!q$d/1
} dM}c-=w`
} pQZ`dS\
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堆排序： BQ,749^S
P7X3>5<;q
package org.rut.util.algorithm.support; qz)KCEs
Ta3* G
import org.rut.util.algorithm.SortUtil; 1.,KN:qe
kxrYA|x
/** +i /4G.=*
* @author treeroot y]!#$C /
* @since 2006-2-2 nql{k/6
* @version 1.0 YajAz5N
*/ $<VH~Q<
public class HeapSort implements SortUtil.Sort{ \ %xku:
mDt!b6N/
/* (non-Javadoc) Dm?:j9o]g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b5~p:f-&4B
*/ E>|fbaN-%
public void sort(int[] data) { `uDOIl
MaxHeap h=new MaxHeap(); Ke[`zui@?
h.init(data); $Ups9pQ
for(int i=0;i h.remove(); :v45Ls4J
System.arraycopy(h.queue,1,data,0,data.length); =yRv*C
} <Pf4[q&wM
-:!Wds
private static class MaxHeap{ .|P :n'
pL*aU=FjQ
void init(int[] data){ K4RQ{fWpm
this.queue=new int[data.length+1]; y(a>Y! dgU
for(int i=0;i queue[++size]=data; C!1)3w|
fixUp(size); 'aeuL1mz
} '"hSX=
} zII^Ny8D
?{L'd
private int size=0; .Y!dO@$:
M`9|8f,!a
private int[] queue; sw:a(o&$
AnE] kq u
public int get() { 1<Uv4S
return queue[1]; BEAY}P(y3
} 6Xn9$C)
GUJ?6;
public void remove() { m}beT~FT_
SortUtil.swap(queue,1,size--); 8wkt9:
fixDown(1); ^%\MOjSN
} w%oa={x
file://fixdown SY}"4=M?l
private void fixDown(int k) { ZBQ@S
int j; qd'Z|'j
while ((j = k << 1) <= size) { &:}WfY!hX
if (j < size %26amp;%26amp; queue[j] j++; bx-:aC)]2
if (queue[k]>queue[j]) file://不用交换 cQ`0d3
break; gTLBR
SortUtil.swap(queue,j,k); @L 6)RF
k = j; xNRMI!yv
} <a+@4d;
} U{@2kg-
private void fixUp(int k) { d<m.5ECC}
while (k > 1) { *vqUOh
int j = k >> 1; ,sg\K>H=
if (queue[j]>queue[k]) >oi?aD%
break; =?\%E[j
SortUtil.swap(queue,j,k); wIWO?w2
k = j; ^nFP#J)_5
} uA t{WDHm
} g`2Oh5dA
^/}&z
} ;R@D
rz%^l1@-
} *q[;-E(fZ#
r{*BJi.b
SortUtil： wL>;_KdU`
]8'PLsS9<w
package org.rut.util.algorithm; _S-@|9\&#
ao|n<*}
import org.rut.util.algorithm.support.BubbleSort; bu08`P9
import org.rut.util.algorithm.support.HeapSort; 2,|;qFJY-@
import org.rut.util.algorithm.support.ImprovedMergeSort; `'pAiu
import org.rut.util.algorithm.support.ImprovedQuickSort; 7 Z? Hyv
import org.rut.util.algorithm.support.InsertSort; W|s";EAM
import org.rut.util.algorithm.support.MergeSort; eYu0")
import org.rut.util.algorithm.support.QuickSort; <:8Ew
import org.rut.util.algorithm.support.SelectionSort; )ac!@slb^7
import org.rut.util.algorithm.support.ShellSort; F'B0\v=
K(WKx7Kky^
/** }O| 9Qb
* @author treeroot *{\))Zmhd
* @since 2006-2-2 @*|T(068&
* @version 1.0 k;qWiYMV
*/ 2n-kJl`: O
public class SortUtil { [Q/kNK
public final static int INSERT = 1; 7lKatk+7K
public final static int BUBBLE = 2; }WBHuVcZG
public final static int SELECTION = 3; Bx5kqHp^1
public final static int SHELL = 4; }Fox
public final static int QUICK = 5; )%lPKp4]
public final static int IMPROVED_QUICK = 6; $2-_j)+
public final static int MERGE = 7; `82Dm!V
public final static int IMPROVED_MERGE = 8; /?Mr2!3N
public final static int HEAP = 9; 'G>9iw
v53|)]V
public static void sort(int[] data) { ibG>|hV
sort(data, IMPROVED_QUICK); |>.</68Z
} es=OWJt^
private static String[] name={ yO*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" JO90TP $
}; & Y2xO
=);@<Jp
private static Sort[] impl=new Sort[]{ )OVa7[-T
new InsertSort(), \<G"9w
new BubbleSort(), uU^iY$w
new SelectionSort(), ["4Tn0g ;
new ShellSort(), ]0j_yX
new QuickSort(), 1MT,A_L
new ImprovedQuickSort(), a;M{-G
new MergeSort(), gU NWM^n
new ImprovedMergeSort(), gx?r8
new HeapSort() pVrY';[,|
}; y\Utm$)j
6<R[hIWpZ}
public static String toString(int algorithm){ \j3dB tc
return name[algorithm-1]; 4z9lk^#"X
} .`V$j.a
$$"G1<EZ
public static void sort(int[] data, int algorithm) { VxARJ*4=Y
impl[algorithm-1].sort(data); >}W[>WReI
} cUdS{K&K
3eXIo=
public static interface Sort { `Pc<0*`a
public void sort(int[] data); %~gI+0HK
} $CX3P)% `
c %Cbq0+2
public static void swap(int[] data, int i, int j) { I0z7bx
int temp = data; +oq<}CNr{
data = data[j]; QCE7VV1Rw
data[j] = temp; Pnm$g;`P
} (/,l0
} 7]ysvSM