[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; xU *:a[g
} !-gU~0
int i1=l; 8fR(y~_gF
int i2=mid+1; K*6"c.D
for(int cur=l;cur<=r;cur++){ k[=qx{Osx%
if(i1==mid+1) 0lw>mxN
data[cur]=temp[i2++]; X/!_>@`7?
else if(i2>r) PnsBDf%v
data[cur]=temp[i1++]; Jh[0xb
else if(temp[i1] data[cur]=temp[i1++]; GK?ual1
else HpwMm^
data[cur]=temp[i2++]; 74s{b]jN'-
} |<%!9Z
} KKeMi@N
{]vD@)k
} >1y6DC
jDzQw>TX
改进后的归并排序: 1Pf(.&/9_
S_}`'Z )
package org.rut.util.algorithm.support; en<mm#Ab
Lu.zc='\
import org.rut.util.algorithm.SortUtil; *kr/,_K
>rG>Bz^Pu
/** Io6/Fv>!
* @author treeroot yNu_>!Cp5
* @since 2006-2-2 {.Tx70kn
* @version 1.0 18g_v"6o
*/ :_{8amO
public class ImprovedMergeSort implements SortUtil.Sort { UD I{4+z
.UyE|t4
private static final int THRESHOLD = 10; HL)!p8UHJ
V35Vi6*p
/* 7y=>Wa?T[
* (non-Javadoc) !^J;S%MB:K
* sXKkZ+2q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lU WXXuO]
*/ 7Z-j'pq
public void sort(int[] data) { -@TY8#O#-
int[] temp=new int[data.length]; 9tiZIm93]
mergeSort(data,temp,0,data.length-1); g40Hj Y
} P<<$o-a"
]5!3|UYS
private void mergeSort(int[] data, int[] temp, int l, int r) { ?H{[u rLn
int i, j, k; N(/)e
int mid = (l + r) / 2; QV4|f[Ki%
if (l == r) @SQsEq+A?\
return; z*@eQauA
if ((mid - l) >= THRESHOLD) b0P3S!E
mergeSort(data, temp, l, mid); tjdPia
else A2 l?F
insertSort(data, l, mid - l + 1); |Q?h"5i"(
if ((r - mid) > THRESHOLD) 6Z\aJ
mergeSort(data, temp, mid + 1, r); 'o$j~Mr
else Z:4/lx7Bq
insertSort(data, mid + 1, r - mid); ,GbmL8P7Y
56.!L
for (i = l; i <= mid; i++) { 0.GFg${v`
temp = data; z2=bbm:
} V>6klA}o
for (j = 1; j <= r - mid; j++) { $ {yct
temp[r - j + 1] = data[j + mid]; 4vhf!!1
} MlO OB
int a = temp[l]; -Cf)`/
int b = temp[r]; }$6L]
for (i = l, j = r, k = l; k <= r; k++) { oOFTQB_6
if (a < b) { nep#L>LP$x
data[k] = temp[i++]; ttP7-y
a = temp; gt kV=V
} else { ^W |YE72Y
data[k] = temp[j--]; %"RJi?
b = temp[j]; ]lWqV
} X+vKY
} I8H3*DE
} ^z,3#gK
uU d"l,V
/** *_V+K
* @param data rYUIFPN
* @param l $H:!3-/
* @param i Szo'[/ [R
*/ xATx2*@X2
private void insertSort(int[] data, int start, int len) { ">V&{a-C4
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); (*-wiL
} /ViY:-8s
} J,W<ha*
} +{UY9_~\3
} "ubp`7%67
#~0Nk6*u
堆排序： L*z=!Dpo
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package org.rut.util.algorithm.support; :X>Wd+lY:_
Q_mphW:[
import org.rut.util.algorithm.SortUtil; -jH|L{Iyq}
dPUe5k)G_
/** 1M ?BSH{
* @author treeroot Rv1W&s&
* @since 2006-2-2 Y@,iDQ
* @version 1.0 a~}q]o?j
*/ $4bc!
public class HeapSort implements SortUtil.Sort{ F:j@JMpQ
osC?2.
/* (non-Javadoc) .7iRV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i_qY=*a?y
*/ \w9}O2lL
public void sort(int[] data) { E@VQxB7+
MaxHeap h=new MaxHeap(); (s8b?Ol/
h.init(data); zJQh~)
for(int i=0;i h.remove(); ;zCUx*{
System.arraycopy(h.queue,1,data,0,data.length); VcjbRpTy&
} Q14zc0N
ay"jWL-
private static class MaxHeap{ k1&9 bgI
`46~j
void init(int[] data){ g`fG84
this.queue=new int[data.length+1]; *s6x
for(int i=0;i queue[++size]=data; zs$r>rlO
fixUp(size); $6"sRI6u
} 9A|A@E#
} /=2aD5r
_p$/.~Xo9
private int size=0; \o<ucp\J
3,PR6a,b'
private int[] queue; U`v2Yw3E
IDct!53~
public int get() { k 9i W1
return queue[1]; s-p)^B
} HxI6_>n^I
J4bP(=w!
public void remove() { A?R`~*Q5
SortUtil.swap(queue,1,size--); 91OxUVd
fixDown(1); 2z>-H595az
} ;"dX]":
file://fixdown }*fBHzNN
private void fixDown(int k) { rPH7 ]]
int j; \Vc[/Qp7Bb
while ((j = k << 1) <= size) { rr#nBhh8
if (j < size %26amp;%26amp; queue[j] j++; 9r%fBiSk
if (queue[k]>queue[j]) file://不用交换 <':h/d
break; }`R,C~-|^
SortUtil.swap(queue,j,k); uq5?t
k = j; 4`O[U#?
} EN m%(G$
} Zue3Z{31T
private void fixUp(int k) { OP/DWf
while (k > 1) { JFv70rBe
int j = k >> 1; SxF'2ii
if (queue[j]>queue[k]) aH}/+Hu-
break; kn3w6]
SortUtil.swap(queue,j,k); RELNWr
k = j; <4rnOQ:
} p)biOG
} {-A|f
$dM_uSt
} BN*:*cmUl
[f+wP|NKL
} K0w}l" )A
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SortUtil： S:1[CNL;
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package org.rut.util.algorithm; Es>' N3A z
1$Hou
import org.rut.util.algorithm.support.BubbleSort; Q4XlYgIV2A
import org.rut.util.algorithm.support.HeapSort; oh5'Isb$
import org.rut.util.algorithm.support.ImprovedMergeSort; sL@\,]Y
import org.rut.util.algorithm.support.ImprovedQuickSort; SZGR9/*^
import org.rut.util.algorithm.support.InsertSort; BX_yC=S
import org.rut.util.algorithm.support.MergeSort; ns~]a:1yh
import org.rut.util.algorithm.support.QuickSort; 2u.0AG
import org.rut.util.algorithm.support.SelectionSort; ^ITF*
import org.rut.util.algorithm.support.ShellSort; rHKO13WF
d(IJ-qJN
/** bi8_5I[
* @author treeroot qU26i"GHp
* @since 2006-2-2 v_KO xV:<`
* @version 1.0 _[rFnyC+0V
*/ { ^o.f
public class SortUtil { l~Jd>9DwY
public final static int INSERT = 1; !Yof%%m$;
public final static int BUBBLE = 2; X>I3N?5
public final static int SELECTION = 3; U["0B8
public final static int SHELL = 4; h$5[04.Q
public final static int QUICK = 5; U7WYS8
public final static int IMPROVED_QUICK = 6; y[N0P0r l:
public final static int MERGE = 7; )rEl{a
public final static int IMPROVED_MERGE = 8; kN=&"
public final static int HEAP = 9; ,I"T9k-^
!!\}-r^y%
public static void sort(int[] data) { @}y.
sort(data, IMPROVED_QUICK); HOx4FXPs
} oq7G=8gTp
private static String[] name={ 88HqP!m%P:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <::lfPP
}; jG>W+lq
Zn9tG:V
private static Sort[] impl=new Sort[]{ 8-#kY}d.
new InsertSort(), 3ijPm<wn
new BubbleSort(), ^ ]9K>}
new SelectionSort(), _}R9!R0O
new ShellSort(), Vn5T Jw
new QuickSort(), 7y$\|WG?!r
new ImprovedQuickSort(), 0?54 8yH
new MergeSort(), ?^VPO%
new ImprovedMergeSort(), ZR1U&<0c@
new HeapSort() FKO2UY#&7
}; `D;*.zrA
pGD@R=8
public static String toString(int algorithm){ xMr,\r'+
return name[algorithm-1]; g}MUfl-L
} tWn dAM(U7
~| j eNT
public static void sort(int[] data, int algorithm) { Q:b0M11QR
impl[algorithm-1].sort(data); qfsPX6]
} d+,!>.<3
|Gic79b
public static interface Sort { X['9;1Xr
public void sort(int[] data); 6f +aGz
} f<8Hvumw
lcl|o3yQ
public static void swap(int[] data, int i, int j) { y,5qY}P+
int temp = data; wPg/.N9H
data = data[j]; k[@P526
data[j] = temp; ]k!Xb
} '3S~QN
} 7^><Vh"qV