[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; XyhdsH5%3!
} wTLHg2'y^
int i1=l; `S2=LJ
int i2=mid+1; ]yyfE7{q
for(int cur=l;cur<=r;cur++){ Y,9("'bo
if(i1==mid+1) G{:L^2>
data[cur]=temp[i2++]; h^4oy^9
else if(i2>r) ,Tpds^
data[cur]=temp[i1++]; $W)FpN;CW/
else if(temp[i1] data[cur]=temp[i1++]; ,PnEDQ|l
else l\bBc,%jt
data[cur]=temp[i2++]; zOcMc{w0
} /bVI'fT
} 7dLPy[8";t
'del|"h!M
} i/->g:47P
dM)fr
改进后的归并排序: I".r`$XZ
H7WKnn@
package org.rut.util.algorithm.support; t+pI<c^]y
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import org.rut.util.algorithm.SortUtil; R8axdV9(
q\ ?6-?Mr
/** y8sI @y6
* @author treeroot <I}k%q'
* @since 2006-2-2 mu*wX'.'
* @version 1.0 Z)HQlm
*/ 5(,WN
public class ImprovedMergeSort implements SortUtil.Sort { UJQ!~g.y]
n1v%S"^
private static final int THRESHOLD = 10; tTY(I1
7oUYRqd
/* 4&?%"2
* (non-Javadoc) BPW:W }
* g{&ux k);
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H|Eu,eq-E
*/ ,5nrovv
public void sort(int[] data) { \aG>(Mr
int[] temp=new int[data.length]; ";Lpf]<
mergeSort(data,temp,0,data.length-1); he/FtkU
} Eh JYdO[e
t&*$@0A
private void mergeSort(int[] data, int[] temp, int l, int r) { 4bmpMF-
int i, j, k; =U?"#
int mid = (l + r) / 2; K,J:i^2
if (l == r) ~;{)S}U@R
return; \wMr[_LW
if ((mid - l) >= THRESHOLD) H>VuUH|
mergeSort(data, temp, l, mid); >2_J(vm>
else TkK- r(=
insertSort(data, l, mid - l + 1); M6?*\9E
if ((r - mid) > THRESHOLD) !X8:#a(
mergeSort(data, temp, mid + 1, r); a7ZPV1k
else kfn5y#6NZ
insertSort(data, mid + 1, r - mid); pbu8Ib8z
Z_S~#[\7^]
for (i = l; i <= mid; i++) { >RRb8=[J
temp = data; Rj-<tR{
} ]NN9FM.2b/
for (j = 1; j <= r - mid; j++) { o-R;EbL
temp[r - j + 1] = data[j + mid]; s`&8tP
} CfAX,f"ZP
int a = temp[l]; A|jaWZM-
int b = temp[r]; /mvuSNk
for (i = l, j = r, k = l; k <= r; k++) { =6/0=a[
if (a < b) { afH`<!
data[k] = temp[i++]; `_<K#AGAi
a = temp; R5qC;_0cV
} else { "GgK,d}%
data[k] = temp[j--]; $/6.4"j
b = temp[j]; n pBpYtG
} \6*3&p
} nx=Zl:Q}
} 3nxJ`W5j
Hw_(Af?C
/** J-hP4t&x
* @param data T0v;8Ee
* @param l u3Ua>A-
* @param i #R@{Bu=C
*/ _"=Yj3?G%
private void insertSort(int[] data, int start, int len) { x?T/=C
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); G=(F-U;*
} rj<r6
} Kt9:V,
} On#RYy^}
} q*,];j/>k
YcT!`B
堆排序： &ciU`//`
]k5l]JB
package org.rut.util.algorithm.support; $#1i@dI
<S%M*j
import org.rut.util.algorithm.SortUtil; -Y{P"!p0
nUD)G<v
/** d0eMDIm3R\
* @author treeroot IA!( 'Ks
* @since 2006-2-2 -ZBk^p
* @version 1.0 L+bU~N,+A
*/ s7#w5fe
public class HeapSort implements SortUtil.Sort{ @u#Tx%
EJ"[{AV
/* (non-Javadoc) # KK>D?.:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '3 5w(
*/ Jn-iIl
public void sort(int[] data) { ul1#_xp
MaxHeap h=new MaxHeap(); UJ<eF/KSmG
h.init(data); Y]Td+Zi
for(int i=0;i h.remove(); +2!F6"hP
System.arraycopy(h.queue,1,data,0,data.length); aovRm|aOo'
} kK>PFk(
CQ9B;i`
private static class MaxHeap{ s`U.h^V
9;NR
void init(int[] data){ *^ g7kCe(
this.queue=new int[data.length+1]; T]Pp\6ff
for(int i=0;i queue[++size]=data; ORD@+ {
fixUp(size); 5v<BB`XWp
} _0<qS{RW
} XOAZ
.A//Q|ot!
private int size=0; ]^uO3!+
LSS3(l[,:
private int[] queue; a39Kl_\
17 Hdj
public int get() { O|}97a^
return queue[1]; 8(&Jy RT
} Tl6%z9rY@
FhVi|Va
public void remove() { "hdcB 0
SortUtil.swap(queue,1,size--); e/'d0Gb-
fixDown(1); h/W@R_Y
} 1-!u=]JDE
file://fixdown :''^a
private void fixDown(int k) { ~m2tWi@
int j; "9:1>Gr{G
while ((j = k << 1) <= size) { F 0q#.
if (j < size %26amp;%26amp; queue[j] j++; E=+v1\t)]
if (queue[k]>queue[j]) file://不用交换 a=>PGriL
break; Ew~piuj
SortUtil.swap(queue,j,k); ,Y6Me+5B
k = j; v,#*%Gn`%
} ZnVi.s~1V
} pj4M|'F7
private void fixUp(int k) { X`YAJG
while (k > 1) { B[w~bW|K
int j = k >> 1; zc%#7"FM
if (queue[j]>queue[k]) sS7r)HV&GI
break; t>:2F,0K9
SortUtil.swap(queue,j,k); ]-FK6jw
k = j; a*@ 6G
} maW,YOyRN
} R]L|&{
`Hld#+R
} O RAKg.49
of!Bz
} SO^:6GuJ
o*& D;
SortUtil： yu"enA
ZbD_AP
package org.rut.util.algorithm; rPWn
^dj avJ
import org.rut.util.algorithm.support.BubbleSort; }c?/-ab>
import org.rut.util.algorithm.support.HeapSort; #&a-m,Y$sx
import org.rut.util.algorithm.support.ImprovedMergeSort; 9&a&O Z{
import org.rut.util.algorithm.support.ImprovedQuickSort; /X>Fn9mM
import org.rut.util.algorithm.support.InsertSort; xrd@GTaI
import org.rut.util.algorithm.support.MergeSort; {W*_^>;K
import org.rut.util.algorithm.support.QuickSort; H.cN(7LXm
import org.rut.util.algorithm.support.SelectionSort; xO"fg9a
import org.rut.util.algorithm.support.ShellSort; gIa/sD2m>
?$T!=e"
/** s=9gp$9m
* @author treeroot -F\xZ
* @since 2006-2-2 `&]<_Jc1
* @version 1.0 bAS('R;4
*/ oVk*G
public class SortUtil { '_!j9A]g
public final static int INSERT = 1; Q[+&n*
public final static int BUBBLE = 2; tCH4-~,#
public final static int SELECTION = 3; OW!cydA-
public final static int SHELL = 4; SUwSZ@l^|
public final static int QUICK = 5; (:v|(Gn/
public final static int IMPROVED_QUICK = 6; Qvo(2(
public final static int MERGE = 7; O&h3=?O&B
public final static int IMPROVED_MERGE = 8; =g|e-XC
public final static int HEAP = 9; t-7^deG'/n
+s?0yH-%p
public static void sort(int[] data) { _' KJ:3e
sort(data, IMPROVED_QUICK); /3`#ldb%}
} Hg$t,\j
private static String[] name={ ~u|k1
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C":i56
}; wi]ya\(*yl
aD)XxXwozm
private static Sort[] impl=new Sort[]{ <,/k"Y=
new InsertSort(), 9ReH@5_bGM
new BubbleSort(), W3K&C[f
new SelectionSort(), aBv3vSq>Q
new ShellSort(), "BSSA%u?c
new QuickSort(), i Lr*W#E
new ImprovedQuickSort(), WrWJ!
new MergeSort(), ZuF"GNUC
new ImprovedMergeSort(), J?4aSssE
new HeapSort() Ws2SD6!4`
}; !}%,rtI
,9jq @_
public static String toString(int algorithm){ sDNV_} h
return name[algorithm-1]; *j9{+yO{ZE
} Z+%Uwj
\z'A6@
public static void sort(int[] data, int algorithm) { []B9Me
impl[algorithm-1].sort(data); IO/%X;Y_
} 9gFb=&1k
pdCn98}%-
public static interface Sort { &%3$zgvR
public void sort(int[] data); Fl)p^uUtl
} f%r0K6p
[>+}2-#
public static void swap(int[] data, int i, int j) { V^Gz7`^
int temp = data; \GA6;6%Oo
data = data[j]; s%Ez/or(T
data[j] = temp; I{>U7i 5
} N$#518
} 4-lG{I_S: