[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; _ebo
} 0,b.;r
int i1=l; e"7<&% Oq
int i2=mid+1; T_\Nvzb}
for(int cur=l;cur<=r;cur++){ ;gS)o#v0
if(i1==mid+1) 99<]~,t=5
data[cur]=temp[i2++]; Gw!VPFV>W
else if(i2>r) sIUhk7Cd8
data[cur]=temp[i1++]; w ]8+ OP
else if(temp[i1] data[cur]=temp[i1++]; oT76)O
else <v&L90+s\;
data[cur]=temp[i2++]; HQtR;[1
} 52X[{
} dY=]ES}`
o#GZ|9IL
} Qt-7jmZw1
f4%Z~3P
改进后的归并排序: Z^tTR]u\$
*Ubsa9'fS
package org.rut.util.algorithm.support; 0R2KI,WI
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import org.rut.util.algorithm.SortUtil; <{ZDD]UGs0
ltQo_k
/** p.wed%O.
* @author treeroot bwrM%BL
* @since 2006-2-2 #)}K,FDd
* @version 1.0 m*bTELb
*/ /thFs4
public class ImprovedMergeSort implements SortUtil.Sort { 1SAO6Wh
rra|}l4Y
private static final int THRESHOLD = 10; EM2=g9y
#VM+.75o1
/* %mqep5n(
* (non-Javadoc) ]>vC.iYp
* wh Hp}r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %#go9H(K
*/ p{@jM
public void sort(int[] data) { FIMM\W
int[] temp=new int[data.length]; +56N}MAs
mergeSort(data,temp,0,data.length-1); W;Y"J_
} ;$nCQ/ /
v2Ft=_*G|
private void mergeSort(int[] data, int[] temp, int l, int r) { >Hr&F nh+
int i, j, k; ! 3 ;;6
int mid = (l + r) / 2; S_eD1iY2-
if (l == r) PJfADB7Y
return; d/"%fpp^0G
if ((mid - l) >= THRESHOLD) XE#a#
mergeSort(data, temp, l, mid); $^TxLv
else e w%rc.;
insertSort(data, l, mid - l + 1); !n`9V^`
if ((r - mid) > THRESHOLD) 7MbV|gM}
mergeSort(data, temp, mid + 1, r); i C)+5L#'
else "]SA4Ud^
insertSort(data, mid + 1, r - mid); dI(1L~
2v$\mL
for (i = l; i <= mid; i++) { }HCt=W`
temp = data; FOyANN'
} iv!;gMco
for (j = 1; j <= r - mid; j++) { .u3;
temp[r - j + 1] = data[j + mid]; dz6&TdEl
} 1La?x'{2MP
int a = temp[l]; w,T-vf
int b = temp[r]; T^ )\
for (i = l, j = r, k = l; k <= r; k++) { 49o/S2b4z
if (a < b) { i}L*PCP
data[k] = temp[i++]; u5.zckV
a = temp; M!`&Z9N
} else { 2^X<n{0N)
data[k] = temp[j--]; @?n~v^
b = temp[j]; x'v-]C(@
} xeB-fy)5+
} lyS`X
} jX7;hQ+P
79z/(T+
/** 6Z@?W
* @param data :IX_|8e ^
* @param l z8dBfA<z
* @param i kp-`_sDg
*/ /[qLf:rGI
private void insertSort(int[] data, int start, int len) { I]z4}#+cX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _<6E>"*m
} v=_Ds<6n
} a"{b}UP
} 6{w'q&LYcE
} I.gF38Mx
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堆排序： 3V]08
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package org.rut.util.algorithm.support; ~bqw!rz
+3k.xP?QS
import org.rut.util.algorithm.SortUtil; k5|GN Y6a
{t*CSI
/** $3S`A]xO
* @author treeroot 9T\\hM)k
* @since 2006-2-2 !S'!oinV
* @version 1.0 J'%W_?wZ
*/ z:8ieJ)C
public class HeapSort implements SortUtil.Sort{ o?d`o$
L@S1C=-/
/* (non-Javadoc) t~|`RMn"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @dn&M9Z
*/ BS2'BS8
public void sort(int[] data) { 5`6U:MDq
MaxHeap h=new MaxHeap(); gL&)l!2Y
h.init(data); e**5_L
for(int i=0;i h.remove(); B2:GGZ|jS
System.arraycopy(h.queue,1,data,0,data.length); q26qY5D
} u"F{cA!B
3fUiYI|&7
private static class MaxHeap{ !iL6/
y[/:?O}g4
void init(int[] data){ <OrQbrWQa
this.queue=new int[data.length+1]; fRwr}n'
for(int i=0;i queue[++size]=data; XaaR>HljJ
fixUp(size); Rw<O%i5/d
} 4,&f#=Y
} 1*f/Y9 Z
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private int size=0; JF'<""
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private int[] queue; I :8s3;
/ <+F/R'=O
public int get() { k_nQmU>
return queue[1]; /GF"D5
} z%nplG'~|
KuF>2KX~Y
public void remove() { lSy_cItF
SortUtil.swap(queue,1,size--); " eS-i@
fixDown(1); Z?qc4Cg
} 9RC:-d;;_
file://fixdown FjW%M;H
private void fixDown(int k) { :|-^et]a8
int j; 7HJH9@8V
while ((j = k << 1) <= size) { \0)2 u[7
if (j < size %26amp;%26amp; queue[j] j++; }+giQw4
if (queue[k]>queue[j]) file://不用交换 ;<=z^1X9
break; 1I%niQv5t
SortUtil.swap(queue,j,k); d>0 j!+s
k = j; HP=5a.
} YXg^t$
} !{!(yP_
private void fixUp(int k) { ?z3|^oU~d
while (k > 1) { U^Iq]L
int j = k >> 1; Y2|c;1~5$
if (queue[j]>queue[k]) sfp.>bMj
break; pS8`OBenA
SortUtil.swap(queue,j,k); aNgJm~K0P
k = j; L?(m5u~b
} wS [k}
} 1i#U&
M8VsU*aU
} /px`FuJI(
wsj5;(f+
} )o;n2T#O
FX+^S?x.
SortUtil： -h21
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package org.rut.util.algorithm; -3SRGr
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import org.rut.util.algorithm.support.BubbleSort; \,G19o}`Es
import org.rut.util.algorithm.support.HeapSort; b(A;mt#N
import org.rut.util.algorithm.support.ImprovedMergeSort; ^oEaE#I
import org.rut.util.algorithm.support.ImprovedQuickSort; ~g *`E!2
import org.rut.util.algorithm.support.InsertSort; /+m7J"Km
import org.rut.util.algorithm.support.MergeSort; @9g!5dcT
import org.rut.util.algorithm.support.QuickSort; ^t[br6G
import org.rut.util.algorithm.support.SelectionSort; .VkLF6
import org.rut.util.algorithm.support.ShellSort; zc1~q
f.RwV+lq
/** 85](,YYz
* @author treeroot zeuSk|O
* @since 2006-2-2 h[]3#
* @version 1.0 uvA2`%T/
*/ $KmE9Se6,
public class SortUtil { nz`"f,
public final static int INSERT = 1; D[(T--LLT
public final static int BUBBLE = 2; C7!=LiK}
public final static int SELECTION = 3; ;_1>nXh
public final static int SHELL = 4; o2^?D`Jr
public final static int QUICK = 5; tp b(.`G
public final static int IMPROVED_QUICK = 6; c#pVN](?
public final static int MERGE = 7; '~76Y9mv
public final static int IMPROVED_MERGE = 8; TzrU |D?
public final static int HEAP = 9; yjucR Fl
9-?kamA
public static void sort(int[] data) { y9Q"3LLic`
sort(data, IMPROVED_QUICK); Rp.FG
} 9z(h8H
private static String[] name={ m A|"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" tHo/Vly6Z
}; (z'!'?v;
Ec['k&*7,
private static Sort[] impl=new Sort[]{ 8;P_KRaE
new InsertSort(), p+R8Mo;I
new BubbleSort(), I`}x9t
new SelectionSort(), ~wd~57i@
new ShellSort(), R(HW0@R@w
new QuickSort(), po+1
new ImprovedQuickSort(), |y2cI,&
new MergeSort(), yGPi9j{QXq
new ImprovedMergeSort(), +,}CuF
new HeapSort() CYC6:g|)
}; WR>2t&;E
eC-nV)]I9
public static String toString(int algorithm){ sJYs{Wm
return name[algorithm-1]; /J'dG%
} A\<WnG>xjP
*!+?%e{;b
public static void sort(int[] data, int algorithm) { 0}aw9g
impl[algorithm-1].sort(data); +luW=j0V
} "O{:jfq
w5}2$r
public static interface Sort { _:9-x;0H2
public void sort(int[] data); "zN]gz=OV>
} )IZ~!N|-w
vM2\tL@"
public static void swap(int[] data, int i, int j) { JY@x.?N5$
int temp = data; \JEI+A PY*
data = data[j]; O:G-I$F|
data[j] = temp; {~:F1J~=
} VUGVIy.
} 5>[j^g+@