[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; f.{/PL
} &~MM\,KML
int i1=l; l(j._j~p
int i2=mid+1; }^"#&w3<
for(int cur=l;cur<=r;cur++){ ysDGF@wZC
if(i1==mid+1) 62Q`&n6
data[cur]=temp[i2++]; ~ ~U,
else if(i2>r) l2ww3)Z
data[cur]=temp[i1++]; 8n~ o="
else if(temp[i1] data[cur]=temp[i1++]; G{!adBna
else %'3Y?d
data[cur]=temp[i2++]; rWS],q=c
} F./$nwb
} ~z$+uK
}Lc8tj<
} yq]/r=e!k
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改进后的归并排序: "(NJ{J#A
<)4>"SN&^
package org.rut.util.algorithm.support; mgL{t"$c
#P/}'rdt
import org.rut.util.algorithm.SortUtil; $>6Kn`UX
SYaL@54
/** Nxr%xTD
* @author treeroot [qHtN.
* @since 2006-2-2 NB)$l2<d
* @version 1.0 {K ,-fbE
*/ ;]I~AGH:
public class ImprovedMergeSort implements SortUtil.Sort { *m.4)2u=
f)9{D[InM^
private static final int THRESHOLD = 10; m1{OaHxKh
y-R:-K XH=
/* U!D\Vd
* (non-Javadoc) !`qw"i
* f J$>VN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I5H#]U
*/ E7AYK&
public void sort(int[] data) { -s,guW |
int[] temp=new int[data.length]; &O;'?/4 S
mergeSort(data,temp,0,data.length-1); k.K;7GZC
} &:}}T=@M1
97-=Vb
private void mergeSort(int[] data, int[] temp, int l, int r) { 9Lp[y%{GP
int i, j, k; =cKrp'
int mid = (l + r) / 2; 5lYzgt-oP
if (l == r) .~Y% AI
return; M7. fz"M
if ((mid - l) >= THRESHOLD) 1Uf8ef1,
mergeSort(data, temp, l, mid); m>8tA+K)+)
else 1WJ%n;
insertSort(data, l, mid - l + 1); ,mm9X\ '
if ((r - mid) > THRESHOLD) Ps=<@,dks
mergeSort(data, temp, mid + 1, r); Ua\<oD79]
else yIG*
insertSort(data, mid + 1, r - mid); 0OF]|hH
nA 5-P}
for (i = l; i <= mid; i++) { LAcK%
temp = data; Y>a2w zr
} x^u[L$
for (j = 1; j <= r - mid; j++) { ,?(IRiq%
temp[r - j + 1] = data[j + mid]; Wt $q{g{C
} %o4HCzId<
int a = temp[l]; \L4+Dv<z
int b = temp[r]; 8Ssk>M*
for (i = l, j = r, k = l; k <= r; k++) { @$] CC1Y
if (a < b) { r}~|,O3bc'
data[k] = temp[i++]; d_w^u|(K
a = temp; ]~J.YX9ST
} else { Qu6Q)dZ<
data[k] = temp[j--]; ganXO5T$
b = temp[j]; u8sK~1CPf
} 3oE3bBj
} "u.4@^+i
} q A?j-H
01AzM)U3"m
/** DY'1#$;
* @param data * u{CnH
* @param l BzyzOtBp3L
* @param i 0$e]?]X6
*/ y+K21(z.
private void insertSort(int[] data, int start, int len) { EWn\]f|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); S)~Riuy$
} l!9G
} ]xf|xs
} [/Ya4=C@
} _?J:Z*z?
oMer+=vH
堆排序： x"xtILrI
#M5[TN!
package org.rut.util.algorithm.support; Tt*n.HA
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import org.rut.util.algorithm.SortUtil; :"e,& %
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/** 7\p<k/TS
* @author treeroot +'f38D*
* @since 2006-2-2 '@ C\,E
* @version 1.0 pGhA
*/ q)E J?-
public class HeapSort implements SortUtil.Sort{ RiNKUk{-
j_Z"=
/* (non-Javadoc) J^]Y`Q`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $IB>a
*/ 6D n[9V
public void sort(int[] data) { +(9qAB7
MaxHeap h=new MaxHeap(); KtY_m`DY4R
h.init(data); ecl$z6'c
for(int i=0;i h.remove(); IsjD-t
System.arraycopy(h.queue,1,data,0,data.length); \/ 8 V|E
} DGllJ_/Z
w+Cs=!
private static class MaxHeap{ |e#ea~/b
+ysP#uAA
void init(int[] data){ \JX.)&> -
this.queue=new int[data.length+1]; I_/kJ#7vj
for(int i=0;i queue[++size]=data; 3[E)/~-
fixUp(size); //\UthOT
} a|\ZC\(xI
} 3kl\W[`?
\hcb~>=C
private int size=0; i'}Z>g5D
(HZzA7eph
private int[] queue; V3]"ROH
C)Ez>~Z
public int get() { hc4W|Ofj
return queue[1]; ND|!U#wMNV
} DTw3$:
3%$nRP X
public void remove() { 1]lm0bfs
SortUtil.swap(queue,1,size--); |(=`l
fixDown(1); .5PcprE/
} ixFuqPij
file://fixdown &%/kPF~<
private void fixDown(int k) { xo46L\
int j; nS}XY
while ((j = k << 1) <= size) { HBc^[fJ^-
if (j < size %26amp;%26amp; queue[j] j++; 8}0O @ wq
if (queue[k]>queue[j]) file://不用交换 jLEwFPz
break; ]c \gUU
SortUtil.swap(queue,j,k); utz!ElzA
k = j; TLk=HGw
} u\-f\Z7
} B3V=;zn3
private void fixUp(int k) { tE: m& ;I
while (k > 1) { {t;{={$
int j = k >> 1; !a[1rQH
if (queue[j]>queue[k]) ]zza/O;31(
break; -$]Tn#`Fb
SortUtil.swap(queue,j,k); ?r,lgaw
k = j; u}7#3JfLn
} ttwfWfX
} N}*|*!6hI
n0T'"i[
} W]UGo,
6J|Y+Y$
} @qfVt
v_gQCS
SortUtil： 1o;+.]B
[8VB"{{&
package org.rut.util.algorithm; TuBl9 p'6
]tVU$9D
import org.rut.util.algorithm.support.BubbleSort; tCk;tu!d
import org.rut.util.algorithm.support.HeapSort; ">G|\_ZF
import org.rut.util.algorithm.support.ImprovedMergeSort; Vc!;O9dP
import org.rut.util.algorithm.support.ImprovedQuickSort; 'j)xryw
import org.rut.util.algorithm.support.InsertSort; 0.~Pzg
import org.rut.util.algorithm.support.MergeSort; L{)e1p]q
import org.rut.util.algorithm.support.QuickSort; !6pOY*> j
import org.rut.util.algorithm.support.SelectionSort; 'y [eH
import org.rut.util.algorithm.support.ShellSort; }wh)I]]U
62&(+'$n
/** }/yhwijg
* @author treeroot 1r?<1vh:z
* @since 2006-2-2 |8$x
* @version 1.0 \S)\~>.`y!
*/ ?dukK3u
public class SortUtil { TvE M{
public final static int INSERT = 1; S3[rv
public final static int BUBBLE = 2; +oZq~2?*S6
public final static int SELECTION = 3; K.Tfu"6
public final static int SHELL = 4; .O{2]e$
public final static int QUICK = 5; LsnM5GU7
public final static int IMPROVED_QUICK = 6; z\,g %u41
public final static int MERGE = 7; g3%Xh0007{
public final static int IMPROVED_MERGE = 8; 99@uU[&IJ
public final static int HEAP = 9; n# %mL<
u6AReL'f
public static void sort(int[] data) { IRemF@
sort(data, IMPROVED_QUICK); <|NP!eMsw8
} 4eym$UWw
private static String[] name={ ;[]{O5TB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :!M/9D*}0
}; t%e}'?#^
2<Tbd"x?
private static Sort[] impl=new Sort[]{ coHzbD~#H
new InsertSort(), )v-sde\
new BubbleSort(), 8I)66
new SelectionSort(), I_('Mr)
new ShellSort(), 1f]04TI
new QuickSort(), x1\,WOrmK
new ImprovedQuickSort(), Fg)Iw<7_2
new MergeSort(), M1^?_;B
new ImprovedMergeSort(), 92F(Sl
new HeapSort() OAMsqeWYA
}; ,~-"EQT
8F(lW)An
public static String toString(int algorithm){ ,BCtNt(
return name[algorithm-1]; F$UvYy4O d
} y#5xS
#Mt'y8|}$
public static void sort(int[] data, int algorithm) { ugEh}3
impl[algorithm-1].sort(data); bwG2=
} ^[noGjy
84UH& b'n
public static interface Sort { G};os+FxF
public void sort(int[] data); +_tK \MN
} $R3]y9`?
P%A^TD|
public static void swap(int[] data, int i, int j) { IWvLt
int temp = data; .az+'1
data = data[j]; 4=S.U`t7
data[j] = temp; .7Zb,r
} %e2,p&0G
} F_o5(`>^