[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; 9Nbg@5(
} TAXkfj
int i1=l; |9i/)LRXe
int i2=mid+1; Z_4H2HseL
for(int cur=l;cur<=r;cur++){ uRq#pYn@
if(i1==mid+1) Er+3S@sfq,
data[cur]=temp[i2++]; H/la'f#o%
else if(i2>r) O |I:[S},
data[cur]=temp[i1++]; m&jt[
else if(temp[i1] data[cur]=temp[i1++]; q ]R @:a/
else (LvOsr~
data[cur]=temp[i2++]; *p5T
} h'q0eqYeu)
} VFaK>gQ
[@?.}!
} RO3e
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改进后的归并排序: ujp,D#xHP
eq 1 4
package org.rut.util.algorithm.support; t:j07 ,1~
6%hEs6-R
import org.rut.util.algorithm.SortUtil; kE(-vE9
QO`SnN}
/** K}*p(1$u
* @author treeroot k-PRV8WO
* @since 2006-2-2 PNxO\Rc
* @version 1.0 %<*pM@
*/ E$yf2Q~k
public class ImprovedMergeSort implements SortUtil.Sort { k49n9EX
xA1pDrfC/
private static final int THRESHOLD = 10; q}24U3ow
]=XL9MI
/* @_:?N(%(
* (non-Javadoc) v&/-&(+
* zSvHvs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ](6vG$\
*/ jE5 9h
public void sort(int[] data) { Fu$Gl$qV?%
int[] temp=new int[data.length]; ]` Gz_e
mergeSort(data,temp,0,data.length-1); QR"O)lP
} n_NG~/x
(=/L#Yg_
private void mergeSort(int[] data, int[] temp, int l, int r) { ScmzbDu
int i, j, k; D'hr\C^
int mid = (l + r) / 2; z8[|LF-dx
if (l == r) ;%.k}R%O@
return; 6!PX! UkF
if ((mid - l) >= THRESHOLD) [67f;?b
mergeSort(data, temp, l, mid); M]zNW{Xt
else qf&{O:,Z
insertSort(data, l, mid - l + 1); 8[P6c;\
if ((r - mid) > THRESHOLD) Jt^JE{m9%
mergeSort(data, temp, mid + 1, r); .xQ'^P_q
else M@ZpgAfq
insertSort(data, mid + 1, r - mid); <T~fh>a
00x^zu?N
for (i = l; i <= mid; i++) { Q2WrB+/
temp = data; FrM~6A_
} cx%9UK*c
for (j = 1; j <= r - mid; j++) { -r0\
temp[r - j + 1] = data[j + mid]; Q6<Uuiw
} >l*9DaZ
int a = temp[l]; eeR@p$4i
int b = temp[r]; >!.lr9(l
for (i = l, j = r, k = l; k <= r; k++) { (zODV4,5k`
if (a < b) { DMpd(ws
data[k] = temp[i++]; C^v-&*v
a = temp; _;RD-kv
} else { N28?JQha
data[k] = temp[j--]; D_kzR
b = temp[j]; otVdx&%]
} 8pt<)Rs}
} FQRcZpv;
} nk.Eq[08
f3B8,>
/** 4T\/wyq0
* @param data ^u&Khc~ y
* @param l WC;a
* @param i jmVy4* P_
*/ nM}`H'0
private void insertSort(int[] data, int start, int len) { $6%;mep
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9rc n*sm
} j@\/]oL^We
} k$- q;VI
} Eu~wbU"%
} #u(,#(P'#
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堆排序： X.5LB!I)
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package org.rut.util.algorithm.support; J~`%Nj5>
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import org.rut.util.algorithm.SortUtil; ee[NZz
Pt;Ahmi
/** RIx6& 7$
* @author treeroot iFchD\E*o
* @since 2006-2-2 UHHKI)(
* @version 1.0 .[s82c]]6
*/ Tz~ftf
public class HeapSort implements SortUtil.Sort{ *dgNpJ 9
!Hj)S](F
/* (non-Javadoc) |^!@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5W-M8dc6
*/ ;itg>\p3
public void sort(int[] data) { rmJ847%y`
MaxHeap h=new MaxHeap(); .?]_yX
h.init(data); K0a 50@B]
for(int i=0;i h.remove(); }-iOYSn
System.arraycopy(h.queue,1,data,0,data.length); kfECC&"
} K7Tell\`
JPKZU<:+V
private static class MaxHeap{ M&-/&>n!
"A3xX&9-q
void init(int[] data){ l_EI7mJ
this.queue=new int[data.length+1]; A2S9h,t
for(int i=0;i queue[++size]=data; 1yc@q8
fixUp(size); E.9k%%X]
} |/Z)?
} p8J"%Jq}
8"^TWzg}L
private int size=0; c17==S
)uWNN"
private int[] queue; 3f8Z?[Bb@
>*CK@"o
public int get() { F x8)jBB_
return queue[1]; KK|Jach
} OUMr}~/
l))IO`s=_
public void remove() { 63$m& ]x
SortUtil.swap(queue,1,size--); essW,2,rjC
fixDown(1); ;Bi{;>3
} ?Qk#;~\yB
file://fixdown )CQ}LbXZy
private void fixDown(int k) { 3Re\ T
int j; Ev#aMK
while ((j = k << 1) <= size) { (DAJ(r~
if (j < size %26amp;%26amp; queue[j] j++; +06j+I
if (queue[k]>queue[j]) file://不用交换 KR0 x[#.*
break; >^N:A
SortUtil.swap(queue,j,k); 2_v>8B
k = j; 49GCj`As
} ="K>yUfcFl
} h65j,v6B
private void fixUp(int k) { #m>mYp8E.5
while (k > 1) { V;(LeuDH|
int j = k >> 1; Y?cw9uYB
if (queue[j]>queue[k]) YZ@-0_Z
break; Xi.?9J`@
SortUtil.swap(queue,j,k); lX3h'h
k = j; 5;Xrf=
} -^DB?j+
} :~Y$\Ww(~
sd%~pY}
} FO$Tn+\6
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} KHtY +93
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SortUtil： g_U69 z
/jD'o>
package org.rut.util.algorithm; |sz9l/,lG
@@jdF-Utj;
import org.rut.util.algorithm.support.BubbleSort; 6*7&X#gG
import org.rut.util.algorithm.support.HeapSort; @AOiZOH
import org.rut.util.algorithm.support.ImprovedMergeSort; tw66XxE
import org.rut.util.algorithm.support.ImprovedQuickSort; Sqs`E[G*
import org.rut.util.algorithm.support.InsertSort; ~@JC1+
import org.rut.util.algorithm.support.MergeSort; -wB AFr
import org.rut.util.algorithm.support.QuickSort; g:U ul4
import org.rut.util.algorithm.support.SelectionSort; wG O)!u 4
import org.rut.util.algorithm.support.ShellSort; [@6iStRg7
/eQn$ZRP,
/** /Ny&;Y
* @author treeroot ?}[keSEh>
* @since 2006-2-2 32yNEP{
* @version 1.0 Bh?;\D'YC
*/ n>WS@b/o
public class SortUtil { OjZ@_V:
public final static int INSERT = 1; 8T4J^6
public final static int BUBBLE = 2; 4"sP= C
public final static int SELECTION = 3; rAKdf??
public final static int SHELL = 4; c+JlM1p@
public final static int QUICK = 5; -MjRFa
public final static int IMPROVED_QUICK = 6; k;sUDmrO
public final static int MERGE = 7; 5M*p1^ >
public final static int IMPROVED_MERGE = 8; \4ZQop
public final static int HEAP = 9; wQ5__"D
?CIa)dhu
public static void sort(int[] data) { &~i1 @\]
sort(data, IMPROVED_QUICK); *4ID$BmO
} (<h,R@:
private static String[] name={ Yr+&|;DB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" n#*cVB81
}; f =Nm2(e
MYjCxy-;A
private static Sort[] impl=new Sort[]{ O%Mh g\#B
new InsertSort(), "k.<"pf
new BubbleSort(), jzQgDed ]
new SelectionSort(), 1n^xVk-G
new ShellSort(), ~L2Fo~fw
new QuickSort(), `6zoZM7?Y
new ImprovedQuickSort(), Jps!,Mflc
new MergeSort(), i|t$sBIh
new ImprovedMergeSort(), q45n.A6a
new HeapSort() z8oSh t`+
}; 8:f(PN
v[m>;Ubg&
public static String toString(int algorithm){ 4h|vd.t
return name[algorithm-1]; C<3An_Dy
} ' {Q L`L
^#nAS2w7U
public static void sort(int[] data, int algorithm) { =#W6+=YN8
impl[algorithm-1].sort(data); uB\A8zC
} (j(6%U
R7#B_^ $
public static interface Sort { J&Ah52
public void sort(int[] data); n}"MF>zDK
} +p2)uXqW
;yr'K
public static void swap(int[] data, int i, int j) { "zugnim
int temp = data; ?n}L+|
data = data[j]; ^W^%PJD|
data[j] = temp; [|vdr.
} b<%6aRC\
} #}.db?[Rv