[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; ;'Vipj
} 6v2RS
int i1=l; 3{I=#>;
int i2=mid+1; .";tnC!e
for(int cur=l;cur<=r;cur++){ x [{q&N!"`
if(i1==mid+1) vu'!-K=0
data[cur]=temp[i2++]; SL\y\GaV
else if(i2>r) XAULD]Q
data[cur]=temp[i1++]; lF}$`6
else if(temp[i1] data[cur]=temp[i1++]; >upXt?
else Aiks>Cyi23
data[cur]=temp[i2++]; ~ut& U
} *CPB5s
} xlPcg7
oA3W {
} k"^t?\Q%vI
%L\{kUam
改进后的归并排序: lgjoF_D
o S:vTr+$
package org.rut.util.algorithm.support; b6WC@j`*T
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import org.rut.util.algorithm.SortUtil; 3e!Yu.q:
&DbGyV8d"|
/** 0q>NE<L
* @author treeroot fCt\2);a
* @since 2006-2-2 djy:
* @version 1.0 leb^,1/D6
*/ MNf@HG
public class ImprovedMergeSort implements SortUtil.Sort { fBWJ%W
5Du>-.r
private static final int THRESHOLD = 10; hDD~,/yVxs
y5AXL5
/* c2\rjK
* (non-Javadoc) &t*8oNwSs
* n2y/zP>TC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z*vpQBbu
*/ l`M5'r]l
public void sort(int[] data) { d[>N6?JA/
int[] temp=new int[data.length]; +zVcOS*-
mergeSort(data,temp,0,data.length-1); +.gf]|
} sQ>B_Y!
@^:7UI_
private void mergeSort(int[] data, int[] temp, int l, int r) { j_6`s!Yw
int i, j, k; _sf#J|kQ
int mid = (l + r) / 2; ~g K-5}%!
if (l == r) 94'k7_q
return; )S wG+k,
if ((mid - l) >= THRESHOLD) V$Xl^#tN
mergeSort(data, temp, l, mid); uku}Mr"p
else lEyG9Xvi
insertSort(data, l, mid - l + 1); WK_y1(v>
if ((r - mid) > THRESHOLD) Oj4u!SY\j
mergeSort(data, temp, mid + 1, r); Dc&9emKI
else _r<zSH%
insertSort(data, mid + 1, r - mid); _,Rsl$Tk'
-e`oW.+
for (i = l; i <= mid; i++) { C$'D]fX
temp = data; fZw9zqg
} z3vsz
for (j = 1; j <= r - mid; j++) { #A|D\IhF
temp[r - j + 1] = data[j + mid]; L)R[)$2(g
} Q2[prrk%j
int a = temp[l]; :p\(y
int b = temp[r]; zU4V^N'
for (i = l, j = r, k = l; k <= r; k++) { Mg a@JA"
if (a < b) { 'Ffy8z{&3
data[k] = temp[i++]; OZ>)sL
a = temp; _[$T29:8\]
} else { (/"K+$8'
data[k] = temp[j--]; t> x-1vf%
b = temp[j]; =$)4:
} 6=G~6Qu
} 5M<'A=
} ^8';8+$
$IxU6=ajn
/** #90[PASx
* @param data mX<Fuu}E*Z
* @param l AK@`'$
* @param i m{bZRkt
*/ jSwtf
private void insertSort(int[] data, int start, int len) { 5q(]1|Sei
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); |P,zGy
} !^)wPmk
} `?zg3GD_
} o[bE
} 96"yNqBf
M1/M}~
堆排序： +{")E)
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package org.rut.util.algorithm.support; S' (cqO}=F
@)W(q5)}9"
import org.rut.util.algorithm.SortUtil; .pS&0gBo\
PcHSm/d0e
/** jb|mip@` <
* @author treeroot %1-K);SJ
* @since 2006-2-2 kCaO\#ta
* @version 1.0 93W
*/ T3USNc51
public class HeapSort implements SortUtil.Sort{ W_[|X}lWP
]>R`;"(
/* (non-Javadoc) JmU<y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g.B%#bfg
*/ j4~7akG
public void sort(int[] data) { m,W) N9 M
MaxHeap h=new MaxHeap(); >lD;0EN
h.init(data); 7BL|x
for(int i=0;i h.remove(); Q00R<hu@F
System.arraycopy(h.queue,1,data,0,data.length); uipq=Yp.
} Usa+b A
jOUK]>ox:
private static class MaxHeap{ DA<F{n.Z:
YSR mt/
void init(int[] data){ !_CX2|
this.queue=new int[data.length+1]; kzZDtI)
for(int i=0;i queue[++size]=data; q"gqO%Wb|
fixUp(size); :a_BD
} ?z2jk
} ?QCmSK=L
w)+wj[6 E
private int size=0; V]I:2k5
?PBa'g
private int[] queue; QGs1zfh*
:ozV3`%$(
public int get() { +hE',i.
return queue[1]; bA}AD`5
} {Ge+O<mD
X}ZlWJ
public void remove() { XDPL;(?
SortUtil.swap(queue,1,size--); :P3{Nxa
fixDown(1); +c^_^Z$_4o
} 4p.^'2m
file://fixdown PG{i,xq_B{
private void fixDown(int k) { ?b||Cr
int j; =43I1&_
while ((j = k << 1) <= size) { 0cHfxy3
if (j < size %26amp;%26amp; queue[j] j++; s}6+8fE"
if (queue[k]>queue[j]) file://不用交换 ze`1fO|%
break; 6iG(C.b
SortUtil.swap(queue,j,k); Zy^=fM
k = j; DH 6q7"@
} ^>C11v
} I*EJHBsQ5
private void fixUp(int k) { Q,{^S,s<
while (k > 1) { ,4[dLWU
int j = k >> 1; 4&Byl85q
if (queue[j]>queue[k]) !c%
break; tAF]2VV(e
SortUtil.swap(queue,j,k); PU W[e%
k = j; U^MuZ
} .%q$d d>>
} v=!YfAn
tR kF
} (a[.vw^g
&5?G-mn
} PgMbMH
[ `7%sn]$
SortUtil： 3UdU"d[75
v:E;^$6Vn
package org.rut.util.algorithm; Yu'a<5f
i[\w%(83Fi
import org.rut.util.algorithm.support.BubbleSort; r'/\HWNP
import org.rut.util.algorithm.support.HeapSort; Hkdf$$\
import org.rut.util.algorithm.support.ImprovedMergeSort; B`fH^N
import org.rut.util.algorithm.support.ImprovedQuickSort; 2nv[1@M
import org.rut.util.algorithm.support.InsertSort; x?#I4RJH;
import org.rut.util.algorithm.support.MergeSort; U&X2cR &a
import org.rut.util.algorithm.support.QuickSort; YutQ]zYA.
import org.rut.util.algorithm.support.SelectionSort; SxJ$b
import org.rut.util.algorithm.support.ShellSort; l3.
U@'F%nHw
/** owvS/"@
* @author treeroot (&jW}1D
* @since 2006-2-2 yub{8f;v
* @version 1.0 v5_7r%Hiw
*/ "+)K |9T#
public class SortUtil { OOnX`
public final static int INSERT = 1; g+xw$A ou
public final static int BUBBLE = 2; Ve}[XqdS^p
public final static int SELECTION = 3; 8'A72*dhX
public final static int SHELL = 4; >H>gH2qp
public final static int QUICK = 5; q/NY72tj0
public final static int IMPROVED_QUICK = 6; #EDEYEW7
public final static int MERGE = 7; 9Hd;353Q
public final static int IMPROVED_MERGE = 8; =.*98
public final static int HEAP = 9; `1Zhq+s
OR:[J5M)
public static void sort(int[] data) { qz!Ph5(
sort(data, IMPROVED_QUICK); ]dSK wxk
} p~&BChBl!=
private static String[] name={ iib
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5u r)uz]w8
}; UZGDdP
}g|nz8
private static Sort[] impl=new Sort[]{ 5{d\uE%'p
new InsertSort(), LH2PTW\b!6
new BubbleSort(), }u%"$[I}
new SelectionSort(), *FK`&(B+}
new ShellSort(), 0w %[
new QuickSort(), j(eFoZz,
new ImprovedQuickSort(), P`S@n/}
new MergeSort(), +f>cxA
new ImprovedMergeSort(), ]5' d&f
new HeapSort() ye%iDdf
}; _OMpIdY,R*
`S3>3
public static String toString(int algorithm){ z[C3
return name[algorithm-1]; 1D F/6y
} >xqM5#m`E$
(gwj)?:
public static void sort(int[] data, int algorithm) { "0CjP+1k
impl[algorithm-1].sort(data); rkB'Hf
} oFDz;6
";x+1R.d
public static interface Sort { tnz+bX26
public void sort(int[] data); Ub_4yN;
} yHeEobvb
4nqoZk^R
public static void swap(int[] data, int i, int j) { c>HK9z{
int temp = data; bc I']WgB-
data = data[j]; >Kivuc
data[j] = temp; sbj";h=E
} L?5f+@0.
} \( )#e