[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; D ^x-^6^
} w/kt3Lw
int i1=l; ](s'L8(x
int i2=mid+1; 6*3.SGUY
for(int cur=l;cur<=r;cur++){ RS^lKJ1 U
if(i1==mid+1) q,+yqrt
data[cur]=temp[i2++]; eN^qG 42
else if(i2>r) 43@{JK9G
data[cur]=temp[i1++]; ;S>])5<
else if(temp[i1] data[cur]=temp[i1++]; (Kv#m 3~
else [xGf,;Z
data[cur]=temp[i2++]; 7eiV{tYF
} %;rHrDP(>
} Wh.?j>vB
|b)Y#)C;
} tfGHea)M
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改进后的归并排序: <UQe.K"
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package org.rut.util.algorithm.support; XR;eY:89
&MCbYph,
import org.rut.util.algorithm.SortUtil; 1 =M ?GDc
7BJzMlJ1Y
/** BYMi6wts
* @author treeroot o<|P9#(U"
* @since 2006-2-2 }3OKC2K~
* @version 1.0 MZT23[+
*/ 6Q${U7%7
public class ImprovedMergeSort implements SortUtil.Sort { y$_eCmq
`nZ)>
private static final int THRESHOLD = 10; egq67S
1fZ(l"
/* u)~C;f)
* (non-Javadoc) 7*?}:
* E<Q f!2s$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RH&~+5
*/ i*@<y/&'
public void sort(int[] data) { iT%} $Lu~
int[] temp=new int[data.length]; G{6;>8h
mergeSort(data,temp,0,data.length-1); K5xX)oV
} ~1>.A(,=z
LyAn&h}
private void mergeSort(int[] data, int[] temp, int l, int r) { ce7CcHQ?B
int i, j, k; Yo|,]X>/
int mid = (l + r) / 2; w.\&9]P3~
if (l == r) ~,i-8jl,
return; `pGa~!vl
if ((mid - l) >= THRESHOLD) 23DiW#o'
mergeSort(data, temp, l, mid); OUhqMVX9C
else Kq;8=xP[
insertSort(data, l, mid - l + 1); _Nqt21sL
if ((r - mid) > THRESHOLD) /K.!sQ$
mergeSort(data, temp, mid + 1, r); "-+\R}q$
else 4#:W.]U8
insertSort(data, mid + 1, r - mid); ;{U@qQD7
O4og?h>
for (i = l; i <= mid; i++) { y9>ZwYN
temp = data; ~2gG(1%At9
} %3ICI
for (j = 1; j <= r - mid; j++) { 1f":HnLRM
temp[r - j + 1] = data[j + mid]; ]hFW73FV
} }#&#^ B#?O
int a = temp[l]; TztAZ2C
int b = temp[r]; ''0fF_P
for (i = l, j = r, k = l; k <= r; k++) { W7 #9jo
if (a < b) { p_${Nj
data[k] = temp[i++]; ~wkj&yVT
a = temp; ]zWon~
} else { 4X+ifZO
data[k] = temp[j--]; j,"@?Wt7
b = temp[j]; !'cl"\h
} 5'X ]k@m_
} @T'i/}nl
} kNobl
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/** *%S"eWb
* @param data -)RH5WGS
* @param l jAm3HI
* @param i MMx9(`t*.
*/ PqiB\~o@Z
private void insertSort(int[] data, int start, int len) { T^Ze3L]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9Ru8~R/\
} B4i!/@0s
} g.zEn/SM
} 3%%o?8ES
} fR*q?,
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堆排序： Stu4t==U
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package org.rut.util.algorithm.support; ,v';>.]
$**r(HV
import org.rut.util.algorithm.SortUtil; Ljx(\Cm
d ysC4DS
/** 'U\<IL#U
* @author treeroot &QGdLXOn
* @since 2006-2-2 HLV2~5Txc
* @version 1.0 !3*(N8_|#
*/ [&#/]Ul'
public class HeapSort implements SortUtil.Sort{ 3< 2}V
aD=A^ktx
/* (non-Javadoc) SU/BQ3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >VN5`Zlw\C
*/ '>' wK.
public void sort(int[] data) { 5sx1Zq7
MaxHeap h=new MaxHeap(); vM*($qpAy
h.init(data); q@nP}Pv&5
for(int i=0;i h.remove(); 5yzv|mrx
System.arraycopy(h.queue,1,data,0,data.length); gT#&"aP5S
} \ytJ=0r
c0;t4( &8
private static class MaxHeap{ 'VlDh`<W
4:dH]
void init(int[] data){ :$m}UA-9
this.queue=new int[data.length+1]; (}EB2V9Hh
for(int i=0;i queue[++size]=data; L.jh
fixUp(size); XbD4:i%
} ^`)) C;
} PGLplXb#[S
+KvU$9Ad>
private int size=0; RHO(?8"_
2E)wpgUc?e
private int[] queue; dVi!Q@y+
n1VaLD
public int get() { CB/D4j;
return queue[1]; 9Bw|(J
} 5 ({t4dm
&' Ne!o8
public void remove() { 9&_<f}ou
SortUtil.swap(queue,1,size--); (<}&DE
fixDown(1); /q5v"iX]T
} 37|&?||
file://fixdown ak |WW]R
private void fixDown(int k) { z2QP)150
int j; g'V>_u#(
while ((j = k << 1) <= size) { -1UD0(
if (j < size %26amp;%26amp; queue[j] j++; D-4f >
if (queue[k]>queue[j]) file://不用交换 7zSLAHW
break; or';A'k
SortUtil.swap(queue,j,k); Z^IPZF
k = j; #>mr[
} Qg[/%$x.
} bS"fkf9
private void fixUp(int k) { obNqsyc77R
while (k > 1) { p|&Yku=
int j = k >> 1; /5:bvg+
if (queue[j]>queue[k]) 7[5.> h
break; }7 c[Q($K
SortUtil.swap(queue,j,k); \V*xWS
k = j; .5y+fL
} 1r]IogI
} ;bLEL"x%
WzF !6n!h
} h9Y%{v
$l|qk z
} HLZ;8/|48m
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SortUtil： ZsOIH<}S
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package org.rut.util.algorithm; HFaj-~b
/x[jQM\
import org.rut.util.algorithm.support.BubbleSort; 7|[mz> "d
import org.rut.util.algorithm.support.HeapSort; vDxe/x%
import org.rut.util.algorithm.support.ImprovedMergeSort; B9H@e#[
import org.rut.util.algorithm.support.ImprovedQuickSort; 8'4S8DM
import org.rut.util.algorithm.support.InsertSort; "t_-f7fS7
import org.rut.util.algorithm.support.MergeSort; R]btAu;Z
import org.rut.util.algorithm.support.QuickSort; a8 mVFm
import org.rut.util.algorithm.support.SelectionSort; ?`#/ 8PN
import org.rut.util.algorithm.support.ShellSort; < !dqTJos
yRfSJbzaf\
/** KjE+QUa
* @author treeroot Y~(Md@!0S
* @since 2006-2-2 <c,u3cp
* @version 1.0 DFd%9*N
*/ NF0%}II&xK
public class SortUtil { o)2W`i&
public final static int INSERT = 1; )8UWhl=
public final static int BUBBLE = 2; AbYqf%~7`l
public final static int SELECTION = 3; .On|uC)!
public final static int SHELL = 4; o17ekML
public final static int QUICK = 5; /gu%:vq
public final static int IMPROVED_QUICK = 6; ykX/9y+-s
public final static int MERGE = 7; naw0$kXTA
public final static int IMPROVED_MERGE = 8; p-/|mL
public final static int HEAP = 9; Y5FbU
qh2ON>e;
public static void sort(int[] data) { \u>"s
sort(data, IMPROVED_QUICK); ^n"OL*ipG
} Bxfc}vC.
private static String[] name={ %ve:hym*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :9_L6
}; |Clut~G
'Ub g0"F(
private static Sort[] impl=new Sort[]{ HsHB!mQV
new InsertSort(), j.L-{6_s>~
new BubbleSort(), Ffv`kn@
new SelectionSort(), PUBWZ^63
new ShellSort(), 0 rXxRQ
new QuickSort(), [5MJwRM^!;
new ImprovedQuickSort(), P5#r,:zL
new MergeSort(), F>-B3x
new ImprovedMergeSort(), .G)(0z("s
new HeapSort() Q'YH>oGh^
}; '=G|Sq^aO
f/Hm{<BY
public static String toString(int algorithm){ 0;:.B j
return name[algorithm-1]; sh`s/JRf
} cnFI &,FM
\e'R@
public static void sort(int[] data, int algorithm) { <p\6AnkMr
impl[algorithm-1].sort(data); g)_e]&
} |*'cF-lp6v
MF'$~gxo
public static interface Sort { .Jrqm
public void sort(int[] data); ghX|3lI\q
} krC{ed
(h5'9r
public static void swap(int[] data, int i, int j) { G_k~X"
int temp = data; W81E!RyP`
data = data[j]; OZTPOz.
data[j] = temp; l#H#+*F
} 2GWMlI
} 'iGzkf}j