[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; joA+
} }ot _k-
int i1=l; O`u!P\
int i2=mid+1; bPOx~ CMh
for(int cur=l;cur<=r;cur++){ K+}Z6_:
if(i1==mid+1) W"*R#:Q
data[cur]=temp[i2++]; f8 jaMn9o
else if(i2>r) -hzza1DP
data[cur]=temp[i1++]; 4 * OU
else if(temp[i1] data[cur]=temp[i1++]; Gw./qu-W
else \1!k)PZdTW
data[cur]=temp[i2++]; ;1dz?'%V
} /'1y`j<
} v<SEGv-
IBqY$K+l
} /OP*ARoC21
'l:2R,cP
改进后的归并排序: J4vKfxEg
!BX62j\?
package org.rut.util.algorithm.support; f+920/>!Z
R\}YD*
import org.rut.util.algorithm.SortUtil; _y9P]@Q7%
1FJ[_l
/** Kzb@JBIF
* @author treeroot 9X%Klm 5w
* @since 2006-2-2 @5wg'mM
* @version 1.0 W~tOH=9>
*/ OeYLL4H
public class ImprovedMergeSort implements SortUtil.Sort { @NIypi$T
T]W -g
private static final int THRESHOLD = 10; 8x"d/D
MT`gr
/* @r?`:&m0
* (non-Javadoc) kut|A
* #H`y1zm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^{s0d+@{
*/ =M5M;
public void sort(int[] data) { P1wRt5
int[] temp=new int[data.length]; sJoi fl 7
mergeSort(data,temp,0,data.length-1); !d\GD8|4
} #+ '@/5{n
ra>`J_
private void mergeSort(int[] data, int[] temp, int l, int r) { @>5<m'}2
int i, j, k; p]&Q`oh
int mid = (l + r) / 2; CK(ev*@\D,
if (l == r) ?6d4T
return; fO^6q1a
if ((mid - l) >= THRESHOLD) u`@f~QP0
mergeSort(data, temp, l, mid); h*UUtLi%WU
else P;%QA+%7
insertSort(data, l, mid - l + 1); k_>{"Rc
if ((r - mid) > THRESHOLD) !h!9SE
mergeSort(data, temp, mid + 1, r); ]5fM?:<l
else wF8\
insertSort(data, mid + 1, r - mid); j\f$r,4
*]WXM.R8
for (i = l; i <= mid; i++) { sK0VT"7K
temp = data; ^gzNP#A<'o
} "PaGDhS
for (j = 1; j <= r - mid; j++) { ok[=1gA#h
temp[r - j + 1] = data[j + mid]; SAh054/St
} v4_OUA>z,
int a = temp[l]; h)8+4?-4I
int b = temp[r]; AJfi,rFPg
for (i = l, j = r, k = l; k <= r; k++) { #<Nvy9
if (a < b) { NCnId}BT
data[k] = temp[i++]; hxVM]e[
a = temp; WN+Jf
} else { _|3TC1N$n
data[k] = temp[j--]; *t{c}Y&@
b = temp[j]; *\KvcRMGUa
} b',bi.FH
} zL'IN)7MU
} %D(prA_w
;&6PL]/d
/** 8$ZSF92C
* @param data 1lyOp
* @param l I<./(X[H:#
* @param i :IVMTdYf
*/ o?K|[gNi
private void insertSort(int[] data, int start, int len) { 6bKO;^0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); DhNo +"!z
} Sn2Ds)Pfx3
} qMES<UL>
} >B/&V|E
} jne9=Als5
t!~YO'<dS
堆排序： ^>8]3@ Nh
' P`p.5nH
package org.rut.util.algorithm.support; KV}U{s+U8
19 wqDIE0
import org.rut.util.algorithm.SortUtil; \h7J/es^p!
Mp"ci+Iu
/** =+}}Sv2
* @author treeroot BrH;(*H)8
* @since 2006-2-2 w2N3+Tkg
* @version 1.0 >xV<nLf/
*/ BX(d"z b<
public class HeapSort implements SortUtil.Sort{ * \o$-6<
(1AA;)`Kp
/* (non-Javadoc) Di<J6xu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9LO.8Jy
*/ } ndvV~*1
public void sort(int[] data) { K=Z]#bm
MaxHeap h=new MaxHeap(); 0*Km}?;0-
h.init(data); `bZU&A(`Be
for(int i=0;i h.remove(); M=[q+A
System.arraycopy(h.queue,1,data,0,data.length); s i"`
} ]Uu(OI<)
+GYMJK`S+
private static class MaxHeap{ G:c8`*5Q
f'6qJk%J
void init(int[] data){ Uk*;C
this.queue=new int[data.length+1]; 2Cd --W+=
for(int i=0;i queue[++size]=data; 6"Lsui??
fixUp(size); ~26s7S}
} %rDmW?T
} j&[.2PW\
lii]4k+z
private int size=0; / }XsuH
1%hM8:)i_
private int[] queue; VUy)4*
YKe0:cWc
public int get() { 85|95P.<
return queue[1]; +# RlX3P
} cl8_rt
3W-NS~y
public void remove() { a\&(Ua
SortUtil.swap(queue,1,size--); Ukx/jNyYv
fixDown(1); Ztyv@z'/Z
} qBBYckS.
file://fixdown I#S~
private void fixDown(int k) { !q-:rW?c
int j; 762o~vY6$
while ((j = k << 1) <= size) { 2JA&{ch
if (j < size %26amp;%26amp; queue[j] j++; %<wQ
if (queue[k]>queue[j]) file://不用交换 u3M`'YCb
break; ^\vfos
SortUtil.swap(queue,j,k); zY+t,2z
k = j; | 3N.5{
} c3zT(FgO>N
} /m Q2;*|
private void fixUp(int k) { }+{*, z
while (k > 1) { jA-5X?!In
int j = k >> 1; hmBnV
if (queue[j]>queue[k]) \za5:?[xB
break; ?Rt1CDu
SortUtil.swap(queue,j,k); MJ>Qq[0
k = j; uXQ7eXX
} })zB".
} `rz`3:ZH
Nxbd~^j
} hsHVX[<5`
y\)G7 (
} 2H?I'<NoC
Bbl)3$`,
SortUtil： O^X[9vrW
8K@"B
package org.rut.util.algorithm; B:3+',i1
l&6U|q`
import org.rut.util.algorithm.support.BubbleSort; ^_*jp[!`b$
import org.rut.util.algorithm.support.HeapSort; SRt$4EL21
import org.rut.util.algorithm.support.ImprovedMergeSort; @ate49W
import org.rut.util.algorithm.support.ImprovedQuickSort; <+? Y
import org.rut.util.algorithm.support.InsertSort; u=@h`5-fp
import org.rut.util.algorithm.support.MergeSort; j8[`~pb
import org.rut.util.algorithm.support.QuickSort; 'R4>CZ%jV
import org.rut.util.algorithm.support.SelectionSort; bmj8WZ
import org.rut.util.algorithm.support.ShellSort; Y7*(_P3/
6(N.T+;]
/** Gd30Be2gd
* @author treeroot y wW-p.
* @since 2006-2-2 >/TB_ykb
* @version 1.0 )Lc<;=w'9
*/ 85r)>aCMn
public class SortUtil { 1u"R=D9p,=
public final static int INSERT = 1; c&7Do}
public final static int BUBBLE = 2; %rpR-}j
public final static int SELECTION = 3; Y )u_nn'[
public final static int SHELL = 4; ?%\mQmjas
public final static int QUICK = 5; 5i!V}hE
public final static int IMPROVED_QUICK = 6; _`bS[%CJ
public final static int MERGE = 7; QL)>/%yU
public final static int IMPROVED_MERGE = 8; pu/m8
public final static int HEAP = 9; F=oHl@
[2GXAvXsT
public static void sort(int[] data) { Sni&?tcY
sort(data, IMPROVED_QUICK); jIAW-hc]
} -`zG_]=-
private static String[] name={ B>~k).M&,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" awj+#^
}; T&9`?QD
94T}iY.
private static Sort[] impl=new Sort[]{ l `fW{lh
new InsertSort(), 8A2if9E3
new BubbleSort(), w1wXTt
new SelectionSort(), {PN:bb
new ShellSort(), \We"?1^
new QuickSort(), r?64!VS;
new ImprovedQuickSort(), Xtci0eS#V
new MergeSort(), h6g=$8E
new ImprovedMergeSort(), ~k9O5S{
new HeapSort() $GQphXb$
}; T1l&B
jMK3T
public static String toString(int algorithm){ M6# \na
return name[algorithm-1]; N1PECLS?
} ;5<P|:^
jyNb(Z
public static void sort(int[] data, int algorithm) { ;xL67e%?
impl[algorithm-1].sort(data); Gu2_dT
} ]}'^`
smV!y8&
public static interface Sort { d{W}p~UbH
public void sort(int[] data); [u[ U_g*
} e[s5N:IUd3
*yrnK3
public static void swap(int[] data, int i, int j) { y $:yz;
int temp = data; ?RDO] I>
data = data[j]; Ru:n~77{
data[j] = temp; x7f:F.
} !;i*\ a
} >b'w'"