[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; i/~1F_
} S}$r>[t
int i1=l; ms!ref4`+
int i2=mid+1; e*bH0';q
for(int cur=l;cur<=r;cur++){ ]4R[<<hd
if(i1==mid+1) q4}PM[K?=\
data[cur]=temp[i2++]; Qtbbb3m;
else if(i2>r) Ku\Y'ub
data[cur]=temp[i1++]; +n<k)E@>J
else if(temp[i1] data[cur]=temp[i1++]; qZ}P*+`Q
else F>]m3(
data[cur]=temp[i2++]; uq, {tV
} 4'-|UPhx
} nBHnkbKoy
UW9?p}F
} 3}@_hS"^8
H^.IY_I`U*
改进后的归并排序: 6oLwfTy
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package org.rut.util.algorithm.support; Q$:![}[(
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import org.rut.util.algorithm.SortUtil; rS4@1`/R
vG;zJ#c
/** AC;V m: @{
* @author treeroot u0#}9UKQ
* @since 2006-2-2 >.'<J]
* @version 1.0 \MjJ9u `8
*/ NPd%M
public class ImprovedMergeSort implements SortUtil.Sort { =JKv:</.G
mt5KbA>nU
private static final int THRESHOLD = 10; /9zE^YcT
6ezS{Q
/* Tszp3,]f
* (non-Javadoc) 34wkzu
* {dL?rQ>5L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 94 e): jS
*/ "y_#7K
public void sort(int[] data) { %H]lGN)
int[] temp=new int[data.length]; X=Ys<TM,
mergeSort(data,temp,0,data.length-1); q^A+<d
} 3,]gEE3
H|ER
private void mergeSort(int[] data, int[] temp, int l, int r) { srYJp^sC
int i, j, k; ^bc;[x&N
int mid = (l + r) / 2; c%[#~;E
if (l == r) [Z~ 2
return; ithewup
if ((mid - l) >= THRESHOLD) LwhyE:1
mergeSort(data, temp, l, mid); )13dn]o=2
else $Bj;D=d@V
insertSort(data, l, mid - l + 1); -s|}Rh?Y
if ((r - mid) > THRESHOLD) qNm$Fx
mergeSort(data, temp, mid + 1, r); -jn WZ5.
else :.?gHF.?
insertSort(data, mid + 1, r - mid); om |"S
4<cz--g
for (i = l; i <= mid; i++) { \mw(cM#:
temp = data; 1fo U
} rp6q?3=g
for (j = 1; j <= r - mid; j++) { j6
temp[r - j + 1] = data[j + mid]; >IX/< {);M
} )r[&RGz6
int a = temp[l]; <JV"@H=
int b = temp[r]; m8SA6Y\
for (i = l, j = r, k = l; k <= r; k++) { $&"V^@
if (a < b) { m!W3Cwz\&
data[k] = temp[i++]; PH*\AZJCl
a = temp; *J+_|_0nlW
} else { fm(e3]
data[k] = temp[j--]; hFk3[zTy
b = temp[j]; G NS`.fS
} 9_QP!,
} A8q;q2
} 2MATpV#BT
0vVV%,v
/** {0;3W7
* @param data iSFuT7;%
* @param l m$9w"8R
* @param i f+|$&p%
*/ xS7$%w['
private void insertSort(int[] data, int start, int len) { h.!}3\Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =56T{N
} pSm $FBW h
} % ,N<
} 0<8XI>.3D
} jS;J:$>^
/s-A?lw^2
堆排序： >yXN,5d[
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package org.rut.util.algorithm.support; CH fVQ|!\
:>aQ~1f>]
import org.rut.util.algorithm.SortUtil; #-8\JEn
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/** n!')wIk
* @author treeroot Ja SI^go
* @since 2006-2-2 .`7cBsXH
* @version 1.0 =l.+,|ZH!
*/ [HN|\afz
public class HeapSort implements SortUtil.Sort{ D;I6Q1I
0W3i()
/* (non-Javadoc) (ZL sB{r^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A>[|g`;t
*/ a6:x"Tv
public void sort(int[] data) { 7@6g<"I
MaxHeap h=new MaxHeap(); 'kYwz;gp
h.init(data); .i^7|o:
for(int i=0;i h.remove(); X*Z8CM_
System.arraycopy(h.queue,1,data,0,data.length); gr-fXZO
} h?-#9<A
I+ es8
private static class MaxHeap{ xr7+$:>a
<" @zn
void init(int[] data){ vsL[*OeI
this.queue=new int[data.length+1]; ?88`fJ@tk?
for(int i=0;i queue[++size]=data; UxD5eJJ
fixUp(size); Kf 2jD4z}
} fK&e7j`qO
} @:tj<\G]
G&;j6<hl
private int size=0; be e5
/T,Z>R
private int[] queue; RUr=fEH
[]0mX70N
public int get() { 6l$L~>
return queue[1]; lCF`*DM#
} `xiCm':
\m=?xb8 f
public void remove() { Z_gC&7+
SortUtil.swap(queue,1,size--); (Y+N@d
fixDown(1); (~$/$%b
} m~lpyAw
file://fixdown cEe?*\G
private void fixDown(int k) { *cTO7$\[
int j; 84i_k
while ((j = k << 1) <= size) { 3+J0!FVla
if (j < size %26amp;%26amp; queue[j] j++; v|ox!0:#
if (queue[k]>queue[j]) file://不用交换 ;f,c't@w
break; JbO ~n )%x
SortUtil.swap(queue,j,k); ]#/4Y_d
k = j; }tPk@$
} m^_6:Q0F!8
} '!P"xBVAu
private void fixUp(int k) { DMF -Y-h
while (k > 1) { c9j*n;Q
int j = k >> 1; N~g:Wf!
if (queue[j]>queue[k]) BZb]SoAL
break; n,~;x@=5
SortUtil.swap(queue,j,k); kkvtB<<Y
k = j; \([WH!7
} Z+pom7A"E
} p"*y58
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} ^v9|%^ug
YpUp@/"
} "4H8A=
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SortUtil： |wox1Wt|E
8h<ehNX ^I
package org.rut.util.algorithm; $6F)R|
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import org.rut.util.algorithm.support.BubbleSort; tn|,O.t
import org.rut.util.algorithm.support.HeapSort; Jti(b*~
import org.rut.util.algorithm.support.ImprovedMergeSort; :Vg}V"QR
import org.rut.util.algorithm.support.ImprovedQuickSort; dbS +
import org.rut.util.algorithm.support.InsertSort; /D_+{dtE
import org.rut.util.algorithm.support.MergeSort; `]$?uQ
import org.rut.util.algorithm.support.QuickSort; M+wt__vHf
import org.rut.util.algorithm.support.SelectionSort; #a| L3zR5v
import org.rut.util.algorithm.support.ShellSort; \Hqc9&0
n:U>Fj>q
/** 0Q593F
* @author treeroot DWt*jX*
* @since 2006-2-2 4$,,Ppn
* @version 1.0 qQxz(}REu9
*/ 0aR,H[r[?
public class SortUtil { JK#vkCkyM
public final static int INSERT = 1; Ufo>|A6;$
public final static int BUBBLE = 2; 5FC4@Ms`
public final static int SELECTION = 3; 2JmZ{
public final static int SHELL = 4; JNWg|Qt
public final static int QUICK = 5; K?#]("De6
public final static int IMPROVED_QUICK = 6; ,pK|SL
public final static int MERGE = 7; NHw x:-RH
public final static int IMPROVED_MERGE = 8; gM>=%/.
public final static int HEAP = 9; 4z:#I;
i.iio-
public static void sort(int[] data) { +Ra3bjl
sort(data, IMPROVED_QUICK); 8_d-81Dd
} ">dq0gD
private static String[] name={ g^kx(p<u`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ZX b}91rzt
}; '#O_}|ZN
SW(q$i
private static Sort[] impl=new Sort[]{ K#K\-TR|$
new InsertSort(), &jV_"_3n
new BubbleSort(), lf>nbvp
new SelectionSort(), G>T')A
new ShellSort(), =QV::/
new QuickSort(), 7s'- +~
new ImprovedQuickSort(), 6S?x D5(
new MergeSort(), kvsA]tK.
new ImprovedMergeSort(), >s*DrfX6
new HeapSort() ++[5q+b
}; vxN0,l
Em13dem
public static String toString(int algorithm){ Q |i9aE
return name[algorithm-1]; `GQ{*_-
} RE46k`44
6R}j-1 <n
public static void sort(int[] data, int algorithm) { a0Oe:]mo\
impl[algorithm-1].sort(data); NB8&
} 1M%S gV-#
}4%/pOi:f
public static interface Sort { W^g[L:s
public void sort(int[] data); w,.qCpT$_
} ySdN;d:q
#Gv{UU$]
public static void swap(int[] data, int i, int j) { d<o.o?Vc
int temp = data; US?Rr
data = data[j]; ~el-*=<m
data[j] = temp; _JGs}aQ
} j kn^Z":
} I#A2)V0P)