[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; H/;AlN|!
} <$25kb R5K
int i1=l; Xrpvq(]
int i2=mid+1; C>,> _
for(int cur=l;cur<=r;cur++){ ! R3P@,j
if(i1==mid+1) R?- zJ ;
data[cur]=temp[i2++]; qcQq.cS_'N
else if(i2>r) U^U hZ!
data[cur]=temp[i1++]; elpTak@
else if(temp[i1] data[cur]=temp[i1++]; 3=} P l,
else u$(ei2f
data[cur]=temp[i2++]; ({!H()
} j?k|-0
} 87eH~&<1
C=cn.CX
} VhAJ1[k4!
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改进后的归并排序: 3MKu!
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package org.rut.util.algorithm.support; N`N?1!fM<}
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import org.rut.util.algorithm.SortUtil; }4h0{H
:2C <;o
/** >Q[ Z{
* @author treeroot SB.=x
* @since 2006-2-2 }Ya! [tX
* @version 1.0 gwXmoM5
*/ EYCZuJxv
public class ImprovedMergeSort implements SortUtil.Sort { EVw{G<
|GsMLY:0
private static final int THRESHOLD = 10; M_2>b:#A*
"Ehh9 m1&
/* DBLM0*B
* (non-Javadoc) qK9A /Mc
* k%kEW%I yG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'd&4MA0X
*/ Ryxu#]s
public void sort(int[] data) { t imY0fx#
int[] temp=new int[data.length]; yx:+Xy*N
mergeSort(data,temp,0,data.length-1); Y5;afU='
} H=g%>W%3
u4m8^fj+T
private void mergeSort(int[] data, int[] temp, int l, int r) { 6-J}ZfGj
int i, j, k; *,*O.#<6
int mid = (l + r) / 2; ^3H:I8gRCl
if (l == r) IA[:-2_
return; o)7Ot\:E
if ((mid - l) >= THRESHOLD) W3\E;C-g0
mergeSort(data, temp, l, mid); $ Y^0l
else s8P3H|0.-
insertSort(data, l, mid - l + 1); hlze]d?z
if ((r - mid) > THRESHOLD) l(}L-:@A
mergeSort(data, temp, mid + 1, r); _2{_W9k
else iF837ng5
insertSort(data, mid + 1, r - mid); op9vz[o#4
OJJ [Er1
for (i = l; i <= mid; i++) { w%\{4T~
temp = data; DG0I-"s
} 6akI5\b
for (j = 1; j <= r - mid; j++) { $?]`2*i
temp[r - j + 1] = data[j + mid]; [{[m)Z^
} @F$}/
int a = temp[l]; (6:.u.b
int b = temp[r]; NqNU:_}
for (i = l, j = r, k = l; k <= r; k++) { ;Oqf{em];
if (a < b) { CmBgay
data[k] = temp[i++]; 1TR+p? "
a = temp; '-[hy>t
} else { Z~8%bfpe
data[k] = temp[j--]; &NoA, `|7
b = temp[j]; WWZ<[[ >
} (FaYagD
} rBi<Yy$z
} r `n|fD.
{#4a}:3
/** H>;,r,
* @param data G kG#+C0L
* @param l 0j6b5<Gpc*
* @param i ~_N,zw{x
*/ f5b|,JJ
private void insertSort(int[] data, int start, int len) { I2*(v%.-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {f)aFGp
} ZeU){CB
} 5p S$rf
} pUF JQ*
} '-Cx-=
&ZkJ,-
堆排序： lX"m|W
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package org.rut.util.algorithm.support; {k-_+#W"
<#nU 06 fN
import org.rut.util.algorithm.SortUtil; 8]`s&d@GY
+_cigxpTc
/** V;"2=)X
* @author treeroot KW[y+c u.#
* @since 2006-2-2 q0Q[]|L
* @version 1.0 "RK"Pn+
*/ Mog [,{w
public class HeapSort implements SortUtil.Sort{ sCzpNJ"8
Zy;jp*Q
/* (non-Javadoc) F+Qnf'at1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e7{6<[k3+$
*/ FK~wr;[
public void sort(int[] data) { rOt{bh6r
MaxHeap h=new MaxHeap(); %7aJSuQN%
h.init(data); *GBV[D[G,
for(int i=0;i h.remove(); R+(f~ j'
System.arraycopy(h.queue,1,data,0,data.length); 3ej237~F,L
} ]GY8f3~|{
8Nyz{T[
private static class MaxHeap{ 'iZwM>l\
[ij) k@.
void init(int[] data){ \ moLQ
this.queue=new int[data.length+1]; {nUmlP=mS
for(int i=0;i queue[++size]=data; ^\Q,ACkZb
fixUp(size); 2)|=+DN;
} y] D\i5Xv
} f>C+l(
y'odn;
private int size=0; gL&w:_
||pOiR5
private int[] queue; )z@ +|A
ArAe=m!u
public int get() { 4_j_!QH87
return queue[1]; @#t<!-8d
} nKr'cb
.u#Hg'oP
public void remove() { 3MHpP5C
SortUtil.swap(queue,1,size--); p19(>|$J
fixDown(1); .$x}~Sw
} 9v*y&V9/
file://fixdown JluA?B7E
private void fixDown(int k) { >W-xDzJry
int j; 3I( n];
while ((j = k << 1) <= size) { kJf0..J[#<
if (j < size %26amp;%26amp; queue[j] j++; e4Y+u8gT
if (queue[k]>queue[j]) file://不用交换 =UK:83R(
break; E2w-b^,5
SortUtil.swap(queue,j,k); u;rmqo1
k = j; RS}_cm0
} l{C]0^6>i
} XfVdYmii
private void fixUp(int k) { UMd.=HC L
while (k > 1) { hN=kU9@knC
int j = k >> 1; NdLe|L?c
if (queue[j]>queue[k]) R"O%##Ws
break; ]f&]E ~i
SortUtil.swap(queue,j,k); y< dBF[
k = j; x zF
} YB4 ZI
} OQ_<Vxz
9ETdO,L)f
} X{Vs
9H4"=!AAgD
} i>h3UIx\
O*?^a7Z)4
SortUtil： 5ILKYUg,
^i_v\E[QU
package org.rut.util.algorithm; yQj J-g(.
af>i
import org.rut.util.algorithm.support.BubbleSort; L,#YP#O,j
import org.rut.util.algorithm.support.HeapSort; rqN+0CT
import org.rut.util.algorithm.support.ImprovedMergeSort; ,#,K_oz
import org.rut.util.algorithm.support.ImprovedQuickSort; 5cQ]vb
import org.rut.util.algorithm.support.InsertSort; Vfy@?x= &
import org.rut.util.algorithm.support.MergeSort; p7`9 d1n
import org.rut.util.algorithm.support.QuickSort; _/>I-\xWA
import org.rut.util.algorithm.support.SelectionSort; &0Y |pY
import org.rut.util.algorithm.support.ShellSort; a-,*iK{_u
-YQS\@?
/** ;k#_/c
* @author treeroot RbxQTM_:M
* @since 2006-2-2 e> 9X
* @version 1.0 7lwI]/ZH*
*/ ti9e(Jt!O
public class SortUtil { DIQ30(MS
public final static int INSERT = 1; DU"Gz!X]Jd
public final static int BUBBLE = 2; k&t.(r\
public final static int SELECTION = 3; x2)WiO/As
public final static int SHELL = 4; Hn)? xw]x
public final static int QUICK = 5; ^J7q,tvbJ
public final static int IMPROVED_QUICK = 6; MYara;k
public final static int MERGE = 7; `{Oqb
public final static int IMPROVED_MERGE = 8; Wq}6RdY$ZA
public final static int HEAP = 9; -wC}JVVcK
^C^I
public static void sort(int[] data) { |/l] ]+
sort(data, IMPROVED_QUICK); By7lSbj
} p.(+L^-=
private static String[] name={ 0H +nVR
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Rh"O$K~
}; _$IWr)8f
DUu:et&c1
private static Sort[] impl=new Sort[]{ |-{ Hy(9
new InsertSort(), h+H+>,N8`
new BubbleSort(), 6%6dzZ
new SelectionSort(), X!z-J>
new ShellSort(), 4>L*7i
new QuickSort(), RF2I_4
new ImprovedQuickSort(), m2(}$z3e
new MergeSort(), Ucy=I$"
new ImprovedMergeSort(), Q Rr9|p{
new HeapSort() -b?M5P*:
}; ]-#/wC[$l=
_,K[kVn
public static String toString(int algorithm){ Ofoh4BL'1@
return name[algorithm-1]; 7#UJ444b~
} r 56~s5A
kkHK~(>G
public static void sort(int[] data, int algorithm) { [vb#W!M&|
impl[algorithm-1].sort(data); &${| o@
} o?M;f\Fy
z@19gD#8
public static interface Sort { 4|\M`T
public void sort(int[] data); u|$HA>F[
} A~E S{Zkh
8irTGA
public static void swap(int[] data, int i, int j) { +[n#{;]<
int temp = data; R'B_YKHBY
data = data[j]; J7{D6@yLS
data[j] = temp; m!<FlEkN
} tuwlsBV
} ^5~x*=_