[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; &t1?=F,]
} ?h)Z ;,}
int i1=l; ~_^#/BnAl
int i2=mid+1; wc##'u
for(int cur=l;cur<=r;cur++){ Ng=XH"ce~
if(i1==mid+1) x#z}A&
data[cur]=temp[i2++]; 5*QNE!
else if(i2>r) GZgu1YR
data[cur]=temp[i1++]; ht _fbh(l
else if(temp[i1] data[cur]=temp[i1++]; O!#yPSq?
else Eshc"U
data[cur]=temp[i2++]; It.G-(
} #;ezMRKM"
} Yg_;Eu0'?
U_!Wg|
} e@[9WnxYe
X1Vx6+[
改进后的归并排序: 7,Tg>,%Q
<n+?7`d,
package org.rut.util.algorithm.support; ?2h)w=dO
&K Ti[
import org.rut.util.algorithm.SortUtil; +dd\_\
!bEy~.
/** HmxA2 ~C
* @author treeroot ~Y=v@] 2/
* @since 2006-2-2 Hrb67a%b
* @version 1.0 )+ }\NCFh
*/ Y"J' 'K
public class ImprovedMergeSort implements SortUtil.Sort { .{,PC
]z5`!e)L
private static final int THRESHOLD = 10; MVe:[=VOT|
rGjP|v@3^
/* h>>KH*dQ
* (non-Javadoc) r)S tp`p
* $Pw@EC]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t[>y=89
*/ 05_aL` &eb
public void sort(int[] data) { D vG9(Eh
int[] temp=new int[data.length]; AUCk]
mergeSort(data,temp,0,data.length-1); ')!+>b(P
} 3q +C8_:
%"#%/>U4
private void mergeSort(int[] data, int[] temp, int l, int r) { ce3w0UeV
int i, j, k; p6=L}L
int mid = (l + r) / 2; _ U/[n\oC
if (l == r) Skm$:`u;
return; =*K~U# uoC
if ((mid - l) >= THRESHOLD) #Av6BGM|,
mergeSort(data, temp, l, mid); WO=X*One
else $nX4!X
insertSort(data, l, mid - l + 1); >eF4YZ"
if ((r - mid) > THRESHOLD) i7@qfe$fR
mergeSort(data, temp, mid + 1, r); C?IvXPlV
else Vn:BasS%
insertSort(data, mid + 1, r - mid); a;},y|'E
y^utMH
for (i = l; i <= mid; i++) { kJ^)7_3
temp = data; rU^?Z
} *Ru@F:
for (j = 1; j <= r - mid; j++) { G8Hj<3`
temp[r - j + 1] = data[j + mid]; n%N|?!rB
} :z=C
int a = temp[l]; p1zT]
int b = temp[r]; <>!Y[Xr^
for (i = l, j = r, k = l; k <= r; k++) { DyZe+,g;S
if (a < b) { .QwwGm
data[k] = temp[i++]; #. mc+n:I
a = temp; g[Tl#X7F
} else { %O9kq
data[k] = temp[j--]; V1aWVLltj
b = temp[j]; o;.6Y `-fJ
} r3OTU$t?
} xLUgbql-
} l)JNNcej
M$|r8%z1
/** f>g<:.k*
* @param data \hN\px
* @param l Q[t|+RNKv2
* @param i 2y6 e]D
*/ {[V<mT2/
private void insertSort(int[] data, int start, int len) { ^O_E T$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); m,i@
} J9+<9g4-t
} i8CO+Iv*{
} /G}TPXA
} =1qM`M
~.-o*
堆排序： b#ih=qE
!% 'dyj
package org.rut.util.algorithm.support; OAGI|`E$/-
%kB84dE
import org.rut.util.algorithm.SortUtil; >93I|C|
0O,Q]P 82f
/** B.O &KRo
* @author treeroot -u!{8S~wA
* @since 2006-2-2 QfHJZ7K.4
* @version 1.0 :PJ5~7C
*/ ElBpF8xJ|o
public class HeapSort implements SortUtil.Sort{ /*v}.fH%
M$@Donx
/* (non-Javadoc) D`Tx,^E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9d5|rk8VS
*/ l)1FCDV
public void sort(int[] data) { 25bLU?x5B
MaxHeap h=new MaxHeap(); 2D`_!OG=
h.init(data); 0m`{m'B4n
for(int i=0;i h.remove(); (g>8!Gl
System.arraycopy(h.queue,1,data,0,data.length); }iOFB&)w
} qKL:#ny
xfAnZBsVo
private static class MaxHeap{ KG8:F].u(
ONc-jU^
void init(int[] data){ OhNEt>
this.queue=new int[data.length+1]; Hi V7
for(int i=0;i queue[++size]=data; _s(izc
fixUp(size); kimqm
} 1-!q,q
} RxeyMNd
*_Sx^`"X`l
private int size=0; \DDRl{
G; onJ>
private int[] queue; GELxS!
bAd$ >DI[
public int get() { <dd(i
return queue[1]; v[}g+3a
} ~8htg8CZ`
Z:e|~#
public void remove() { p1mY@[A
SortUtil.swap(queue,1,size--); <gtqwH]
fixDown(1); >axf_k
} ^kF-mM=
file://fixdown {,Py%.vvR
private void fixDown(int k) { *pOdM0AE
int j; f(}AdW}?
while ((j = k << 1) <= size) { n}T;q1
if (j < size %26amp;%26amp; queue[j] j++; 9pPohR*#V
if (queue[k]>queue[j]) file://不用交换 i_KAD U&mP
break; >h>
SortUtil.swap(queue,j,k); %^){)#6w
k = j; |Qa[N(
} XXe?@w2{
} Hyj<Fqr!.
private void fixUp(int k) { *w/})Y3^
while (k > 1) { SZ*Nr=X
int j = k >> 1; ahnQq9
if (queue[j]>queue[k]) !-OPzfHrI
break; $vQ#ah/k
SortUtil.swap(queue,j,k); 8@}R_GZc
k = j; 1hT!~'
} OlV'#D
} Wxxnc#;lv
KJf~9w9U
} wB0zFlP
f/VrenZ_
} mAFVjSa2
Q6r!=yOEY
SortUtil： Owa]ax5
M-B-
package org.rut.util.algorithm; u,rieKYF
NSPa3NE
import org.rut.util.algorithm.support.BubbleSort; I9 R\)3"
import org.rut.util.algorithm.support.HeapSort; A`D^}F6
import org.rut.util.algorithm.support.ImprovedMergeSort; #Ang8O@y
import org.rut.util.algorithm.support.ImprovedQuickSort; \40d?N#D
import org.rut.util.algorithm.support.InsertSort; DsY$
import org.rut.util.algorithm.support.MergeSort; bLHj<AX#>|
import org.rut.util.algorithm.support.QuickSort; JmR) g
import org.rut.util.algorithm.support.SelectionSort; ;{Sgv^A
import org.rut.util.algorithm.support.ShellSort; y.LJ5K$&a
A|D]e)/6+B
/** OEkx}.w
* @author treeroot XgfaTX*
* @since 2006-2-2 fnUR]5\tc
* @version 1.0 2`o}neF{
*/ ^rKA=siz
public class SortUtil { SnhB$DG
public final static int INSERT = 1; ;,8bb(j
public final static int BUBBLE = 2; S!<1CFh
public final static int SELECTION = 3; WB=pRC@
public final static int SHELL = 4; eDm~B(G$
public final static int QUICK = 5; }Ot I8;>
public final static int IMPROVED_QUICK = 6; ;Ly(O'9
public final static int MERGE = 7; xz+Y1fYT
public final static int IMPROVED_MERGE = 8; e*Gm()Vu,
public final static int HEAP = 9; 4)BPrWea1
#>|l"1
public static void sort(int[] data) { DiB~Ovh|
sort(data, IMPROVED_QUICK); fC2
} ;?y*@*2u
private static String[] name={ sI u{_b
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" q>~\w1%}a\
}; y1JxAj
r3@Q(Rb
private static Sort[] impl=new Sort[]{ Sv7_-#SW<(
new InsertSort(), [I;5V=bKW
new BubbleSort(), 5pBQ~m3
new SelectionSort(), ZwLD7j*)
new ShellSort(), ?,JN?
new QuickSort(), ICD(#m
new ImprovedQuickSort(), ?Jlz{msI
new MergeSort(), ~h~K"GbC?
new ImprovedMergeSort(), x9#>0 4s
new HeapSort() )p-B@5bb
}; jhWNMu
|\ 1?CYx
public static String toString(int algorithm){ uv++Kj!
return name[algorithm-1]; *-timVlaE
} wl{Fx+<^3
p%A(5DE
public static void sort(int[] data, int algorithm) { .(Gq9m[~8H
impl[algorithm-1].sort(data); ?-g=Rfpag
} g8yWFqE!T
kO:iA0KUX
public static interface Sort { w#Y<~W&
public void sort(int[] data); <qzHMyAi
} T/ CI?sn
`0rEV_$
public static void swap(int[] data, int i, int j) { }b+tD3+
int temp = data; R|T_9/#)
data = data[j]; //G5lW/*
data[j] = temp; J9oGwP
} =nEl m*E
} '#SacJ\L7