[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; |PI]v`[
} z]d^%>Ef
int i1=l; }`SXUM_sD`
int i2=mid+1; .\W6XRw
for(int cur=l;cur<=r;cur++){ `!K!+`Z9
if(i1==mid+1) #4iiY6
data[cur]=temp[i2++]; #]BpTpRAe<
else if(i2>r) |.s#m^"
data[cur]=temp[i1++]; S!u`V3-s
else if(temp[i1] data[cur]=temp[i1++]; +Yuy%VT
else H"_]Hq
data[cur]=temp[i2++]; <K#]1xCA
} 5:=ECtKi
} CQLh;W`Dc
1o;*`
} F%}0q&
icX$<lD
改进后的归并排序: ,w+}Evp])
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package org.rut.util.algorithm.support; !*U#,qY
LB)sk$)
import org.rut.util.algorithm.SortUtil; pO~VI$7
^aW?0qsH
/** _>/T<Db
* @author treeroot .q>4?+
* @since 2006-2-2 m^8KHa
* @version 1.0 wR"4slY_%
*/ 4sVr]p`
public class ImprovedMergeSort implements SortUtil.Sort { Z1(-FT6O
T@GR Tg
private static final int THRESHOLD = 10; ()E:gqQ
+hz^( I7
/* BBub'
* (non-Javadoc) I3 %P_oW'
* owA0I'|V-A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {GaQV-t
*/ $rZ:$d.C
public void sort(int[] data) { 4zF|}aiQ
int[] temp=new int[data.length]; Wgh4DhAW
mergeSort(data,temp,0,data.length-1); #&@qmps(T
} :\0q\2e[<
G]Jchg <
private void mergeSort(int[] data, int[] temp, int l, int r) { 8\M%\]_
int i, j, k; $jd>=TU|
int mid = (l + r) / 2; ^GXy:S$
if (l == r) .>(?c92
return; 4LCgQS6
if ((mid - l) >= THRESHOLD) A/ eZ!"Y
mergeSort(data, temp, l, mid); HzO6hb{jJO
else YzcuS/~x
insertSort(data, l, mid - l + 1); AX|-Gv
if ((r - mid) > THRESHOLD) R|Oy/RGY$
mergeSort(data, temp, mid + 1, r); LE15y>
else 2C@hjw(
insertSort(data, mid + 1, r - mid); 4{'0-7}
A2`QlhZ
for (i = l; i <= mid; i++) { XsldbN^6
temp = data; a<.7q1F
} x 5u.D^
for (j = 1; j <= r - mid; j++) { oCLs"L-r{
temp[r - j + 1] = data[j + mid]; @-z#vJ5Qe{
} )P^5L<q>|
int a = temp[l]; !;SpQ28
int b = temp[r]; vT<q zN
for (i = l, j = r, k = l; k <= r; k++) { )shzJ9G
if (a < b) { /H)K_H#|;
data[k] = temp[i++]; ,w.`(?I/
a = temp; LE_1H>
} else { $*| :A
data[k] = temp[j--]; (D'Z4Y
b = temp[j]; &gkGH<oaX
} *yuw8
} K_V44f1f
} @jW_ rj:<
i<g|+}I
/** O&#bC
* @param data <v?9:}
* @param l )x.}B4z
* @param i k_9tz}Z
*/ p[(VhbN
private void insertSort(int[] data, int start, int len) { mMqT-jT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *G^n<p$"
} %Fc,$ =
} j+3~
} ]JX0:'x^
} s,TKC67.%+
5/Ng!bW
堆排序： |Xblz1>DF
IMY?L
package org.rut.util.algorithm.support; d7A08l{
pRtxyL"y
import org.rut.util.algorithm.SortUtil; A>6b 6
%3e}YQe)
/** 0&U,WA
* @author treeroot ,P^pDrc
* @since 2006-2-2 tb7Wr1$<
* @version 1.0 b 2n.v.$G
*/ (NUk{MTX
public class HeapSort implements SortUtil.Sort{ c'_-jdi`>_
/"?y @;Y~
/* (non-Javadoc) e-4XNL[F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?@9kVB*|
*/ :X[(ymWNE
public void sort(int[] data) { *LeFI%
MaxHeap h=new MaxHeap(); UYH;15s
h.init(data); v*5n$UFV
for(int i=0;i h.remove(); E%\iNU!
System.arraycopy(h.queue,1,data,0,data.length); KO(+%>^R
} vy#n7hdCc
P}o:WI4.cB
private static class MaxHeap{ SU"-%}~O#,
AiSO|!<.N
void init(int[] data){ lhTjG,U=
this.queue=new int[data.length+1]; )W'l^R4W
for(int i=0;i queue[++size]=data; F\+wM*:U
fixUp(size); |,bsMJh0
} _`WbR&d2Id
} * B,D#;6
`G\uTCpk
private int size=0; 9|dgmEd
PYqx&om
private int[] queue; 4VPL -":6
@`aR*B
public int get() { I#Ay)+D
return queue[1]; B:5(sK
} w!)B\l^+c
6\)61o_1|
public void remove() { zF%CFqQ
SortUtil.swap(queue,1,size--); x^}kG[s
fixDown(1); i]*Wt8~!
} (7x5
file://fixdown >z6(fM`i
private void fixDown(int k) { `h12
int j; {zBf*x
while ((j = k << 1) <= size) { r00waw>C\
if (j < size %26amp;%26amp; queue[j] j++; p~I+ZYWF'
if (queue[k]>queue[j]) file://不用交换 dg 0`0k
break; 9@Yk8
SortUtil.swap(queue,j,k); "<0BCJJ
k = j; >/1N#S#9
} Kxz<f>`b/
} "K`B'/08^
private void fixUp(int k) { `@ULG>
while (k > 1) { O^hWG ~o
int j = k >> 1; 9_[TYzpB!
if (queue[j]>queue[k]) Wm4@+}
break; WV!qG6\W
SortUtil.swap(queue,j,k); = ^:TW%O
k = j; U?JZ23>bbw
} 33|>u+
} ]uX'[Z}t
q=ZLSBZ
} %TxFdF{A
2hAu~#X
} =v=a:e
t>f<4~%MJ
SortUtil： I\PhgFt@O
M4pEwD
package org.rut.util.algorithm; rOw""mE
!HL7a]PB
import org.rut.util.algorithm.support.BubbleSort; szMh}q"u
import org.rut.util.algorithm.support.HeapSort; vL@N21u
import org.rut.util.algorithm.support.ImprovedMergeSort; ?1i>b->
import org.rut.util.algorithm.support.ImprovedQuickSort; !Sfy'v.
import org.rut.util.algorithm.support.InsertSort; R!;tF|]
import org.rut.util.algorithm.support.MergeSort; Z; Xg5
import org.rut.util.algorithm.support.QuickSort; )YRVy
import org.rut.util.algorithm.support.SelectionSort; x;S v&
import org.rut.util.algorithm.support.ShellSort; bgGd
CE-ySIa
/** br+{23&1R#
* @author treeroot 'YQ"Lf
* @since 2006-2-2 {NXc<0a(
* @version 1.0 6ND,4'6
*/ Zalgg/.
public class SortUtil { Kvv&# eO\
public final static int INSERT = 1; LGKkT?fcSC
public final static int BUBBLE = 2; FOgF'!K
public final static int SELECTION = 3; /E$"\md
public final static int SHELL = 4; jFpXTy[>
public final static int QUICK = 5; 6UR.,*f=
public final static int IMPROVED_QUICK = 6; {o< 4 ^
public final static int MERGE = 7; aM5zYj`pW
public final static int IMPROVED_MERGE = 8; ~PP*k QZlJ
public final static int HEAP = 9; T{d7,.:
bwUsE U 0
public static void sort(int[] data) { xi8RE@gm
sort(data, IMPROVED_QUICK); qlD+[`=b
} _H>ABo
private static String[] name={ ym:^Y-^iV
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" G*uy@s:
}; T!eeMsI
PmyS6a@
private static Sort[] impl=new Sort[]{ >3s9vdUp4h
new InsertSort(), x0@J~ _0
new BubbleSort(), x:b0G
new SelectionSort(), n^'ip{
new ShellSort(), .5|AX6p+^
new QuickSort(), qPuxYU
new ImprovedQuickSort(), )VQ:L:1t(
new MergeSort(), Ox.&tW%@
new ImprovedMergeSort(), [[P?T^KT
new HeapSort() yZ)GP!cM4c
}; `YAqR?Xj_<
~{iBm"4
public static String toString(int algorithm){ EMzJJe{Cv
return name[algorithm-1]; p8hF`D~
} %YG ~ql
GJai!$v
public static void sort(int[] data, int algorithm) { JVf8KHDj
impl[algorithm-1].sort(data); db`xlvrCY
} o1YX^-<[F
zM"OateA
public static interface Sort { R8P7JY[h
public void sort(int[] data); &G7JGar
} ~V[pu
%sP C3L
public static void swap(int[] data, int i, int j) { zg+78
int temp = data; N[d*_KN.!
data = data[j]; EWNh:<F?
data[j] = temp; trnjOm
} KhAj`vOzK
} |8PUmax