[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; +Y$EZL.A
} 10bv%ZX7
int i1=l; _c}# f\ +_
int i2=mid+1; E@AV?@<sc
for(int cur=l;cur<=r;cur++){ HK%W7i/k@
if(i1==mid+1) j[dgY1yE:
data[cur]=temp[i2++]; )l`VE_(|
else if(i2>r) 0ZZ Wj%
data[cur]=temp[i1++]; wyLyPJv
else if(temp[i1] data[cur]=temp[i1++]; J6<O|ng::
else /Ba/gq0j
data[cur]=temp[i2++]; vTIRydg2b
} t >.=q:
} 1jaK N*
EG3u)}vI
} Ynp#3r
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改进后的归并排序: o%0To{MAF-
oa`7ClzD
package org.rut.util.algorithm.support; ~@T`0W-Py
i)$<j!L
import org.rut.util.algorithm.SortUtil; _~S[
W! J@30
/** 7<Y aw,G
* @author treeroot =F %lx[9Ye
* @since 2006-2-2 O%px>rdkY
* @version 1.0 ud"Kko Rt
*/ 'ud[#@2
public class ImprovedMergeSort implements SortUtil.Sort { #Jr4LQ@A9
O{Z${TC[
private static final int THRESHOLD = 10; Iv*u#]{t
wzBI<0]z
/* 9`M7 -{
* (non-Javadoc) sa"}9IE*8
* :H+8E5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MIh\z7gW
*/ z<.?8bd
public void sort(int[] data) { #&%>kfeJ)<
int[] temp=new int[data.length]; i?7?I
mergeSort(data,temp,0,data.length-1); "b%FkD
} <;Tr
#7/39zTK
private void mergeSort(int[] data, int[] temp, int l, int r) { cH+ ~|3
int i, j, k; ,J:Ro N_:
int mid = (l + r) / 2; q>5j (,6F
if (l == r) cS Qb3}a\
return; aK7}}
if ((mid - l) >= THRESHOLD) !%.=35NS@E
mergeSort(data, temp, l, mid); z\woTL6D]
else {Byh:-e<
insertSort(data, l, mid - l + 1); *kEzGgTzoS
if ((r - mid) > THRESHOLD) :\y' ?d- Q
mergeSort(data, temp, mid + 1, r); <Y$( lszT
else )V&hS5P=S
insertSort(data, mid + 1, r - mid); Cl{Ar8d}
\k^ojzJ
for (i = l; i <= mid; i++) { 8 VhU)fY
temp = data; g!9|1z
} l[rK)PM
for (j = 1; j <= r - mid; j++) { I0!]J{
temp[r - j + 1] = data[j + mid]; <1 ;pyw y
} e+MQmWA'F
int a = temp[l]; yrd1J$
int b = temp[r]; vTTXeS-b
for (i = l, j = r, k = l; k <= r; k++) { T k@~w
if (a < b) { 4S[UJ%
data[k] = temp[i++]; d`~~Ww1
a = temp; 5}c8v2R:B
} else { bvZ:5M
data[k] = temp[j--]; c] t@3m
b = temp[j]; h_SkX@"/-
} II!~"-WH
} =G"ney2
} o"_'cNAz
8m=O408Q
/** OmS8cSYGc
* @param data JbQY{z!
* @param l -Mz[S
* @param i DUh\x>^
*/ Ez-Q'v(9
private void insertSort(int[] data, int start, int len) { w~ON861
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $2RSYI`py
} lW|v_oP9
} '2ZvK
} i'4.w?OZ
} R<(xWH
4 Tw~4b
堆排序： s~9n13z
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package org.rut.util.algorithm.support; >P&1or)e%
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import org.rut.util.algorithm.SortUtil; $EX(-!c
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/** =I@I
* @author treeroot ]V_A4Df
* @since 2006-2-2 :2&"ak>N
* @version 1.0 Z#bO}!
*/ D W^Zuu/)
public class HeapSort implements SortUtil.Sort{ RS l*u[fB
M.r7^9P
/* (non-Javadoc) B?- poB&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) - l^3>!MAM
*/ 9 <{C9
public void sort(int[] data) { =:]v~Ehq
MaxHeap h=new MaxHeap(); 7 )rL<+
h.init(data); _53~D=
for(int i=0;i h.remove(); cD}]4
System.arraycopy(h.queue,1,data,0,data.length); ^_<|~
} h /^bRs`;
Q2uV/M1?
private static class MaxHeap{ B4wRwrVI>
nw0#gDI|
void init(int[] data){ M +r!63T
this.queue=new int[data.length+1]; -]H~D4ng
for(int i=0;i queue[++size]=data; "aCAA#$J
fixUp(size); e,MsF4'
} ;R[3nb9%
} kS:#|yY8%
T'@+MA) ~
private int size=0; >m..
oPM*VTMA
private int[] queue; 13`Mt1R
|K06H ?6X
public int get() { ^W,5A;*3
return queue[1]; +38R#2JV
} UL{J%Ze=~
Xq&BL,lS
public void remove() { 46Sz#^y P
SortUtil.swap(queue,1,size--); {G VA4=UAE
fixDown(1); s&(;
} y,3ZdY"
file://fixdown IhYR4?e
private void fixDown(int k) { JcA+ztPU
int j; Np/\}J&IF
while ((j = k << 1) <= size) { Zo yO[#
if (j < size %26amp;%26amp; queue[j] j++; VL$ T
if (queue[k]>queue[j]) file://不用交换 $ VP1(C
break; hW<v5!,
SortUtil.swap(queue,j,k); @qq"X'3t
k = j; Wi'}d6c
} HOF$(86zqA
} X["xC3 i
private void fixUp(int k) { %.<_+V#h
while (k > 1) { W%-XN
int j = k >> 1; 2_+>a"8Y
if (queue[j]>queue[k]) 6AGZ)gX
break; hN &?x5aC>
SortUtil.swap(queue,j,k); Bhd)# P
k = j; JHt U"
} y~@zfJ5/^
} Kbf(P95+uL
AXW.`~ 4
} &|~7`
/uj^w&l#
} *}d N.IL,
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SortUtil： P*OG`%y
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package org.rut.util.algorithm; zqo0P~
p;w&}l{{
import org.rut.util.algorithm.support.BubbleSort; +*:mKx@Nw
import org.rut.util.algorithm.support.HeapSort; /[.V(K D
import org.rut.util.algorithm.support.ImprovedMergeSort; -HG.GA
import org.rut.util.algorithm.support.ImprovedQuickSort; 4JAz{aw'b
import org.rut.util.algorithm.support.InsertSort; . : Wf>:
import org.rut.util.algorithm.support.MergeSort; j)?M
import org.rut.util.algorithm.support.QuickSort; ehr-o7](
import org.rut.util.algorithm.support.SelectionSort; *WQ?r&[_'
import org.rut.util.algorithm.support.ShellSort; 6FA+qYSV
o8 JOpD
/** <$0is:]
* @author treeroot 4a+gM._+O
* @since 2006-2-2 b-sN#'TDg
* @version 1.0 Pwl*5/l
*/ '|[V}K5m/f
public class SortUtil { q"u,Tnc;
public final static int INSERT = 1; FklR!*oL,)
public final static int BUBBLE = 2; xR/CP.dg
public final static int SELECTION = 3; ctZ,qg*N
public final static int SHELL = 4; ,,gMUpL7_8
public final static int QUICK = 5; iZ-R%-}B
public final static int IMPROVED_QUICK = 6; .ybmJU*Hg
public final static int MERGE = 7; w`)5(~b
public final static int IMPROVED_MERGE = 8; W2 -%/
public final static int HEAP = 9; nn_O"fZi
]?tRO
public static void sort(int[] data) { ?,>3uD#
sort(data, IMPROVED_QUICK); rPaJ<>Kz
} &q-&%~E@
private static String[] name={ AG@gOm
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H9/!oI1P?
}; rx1u*L
9&n9J^3L
private static Sort[] impl=new Sort[]{ J:yv82
new InsertSort(), wUv?;Y$C
new BubbleSort(), hG?y)g\A
new SelectionSort(), ]#)(D-i
new ShellSort(), |Vx[
new QuickSort(), +'<PW+U$
new ImprovedQuickSort(), "GO!^ZG]
new MergeSort(), eU1F7LS
new ImprovedMergeSort(), ez,.-@O
new HeapSort() "?NDN4l*
}; s6,~JF^
WigtTAh4
public static String toString(int algorithm){ bC `<A
return name[algorithm-1]; z1mB Hz6
} j=l2\W#}
|nefg0`rk
public static void sort(int[] data, int algorithm) { (,U|H`
impl[algorithm-1].sort(data); _QL|pLf-
} !kovrvM6F
&Hb%Q! ^Kb
public static interface Sort { D&%8JL
public void sort(int[] data); o08WC'bX
} |g&V? lI
Lv%3 jj
public static void swap(int[] data, int i, int j) { #n>U7j9`O
int temp = data; .G{cx=;
data = data[j]; 3K &637
data[j] = temp; W{F)YyR{.
} z9aR/:W}
} |]?f6^|4