[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; '$[%x
} =|dHD
int i1=l; k 7:Z\RGy
int i2=mid+1; U+zntB
for(int cur=l;cur<=r;cur++){ V[n,fEPBr
if(i1==mid+1) J$lfI^^
data[cur]=temp[i2++]; %M:$ML6b<
else if(i2>r) w~yC^`
data[cur]=temp[i1++]; zbgGK7
else if(temp[i1] data[cur]=temp[i1++]; kn/xt
else f~7V<v
data[cur]=temp[i2++]; k8r1)B4ab
} Z\cD98B#
} Hbn78,~.
=.w~qL
} $hMD6<e
Cj$:TWYIh[
改进后的归并排序: Qe-PW9C
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package org.rut.util.algorithm.support; AH_qZTv0{Q
"BZ@m:I6hy
import org.rut.util.algorithm.SortUtil; 3O;"{E= <
}Rw6+;
/** ).AMfBQ=;
* @author treeroot "Q{l])N
* @since 2006-2-2 2$v8{Y&
* @version 1.0 EWr7eH
*/ 0T^0)c
public class ImprovedMergeSort implements SortUtil.Sort { nLCaik_,m
)j\_*SoH
private static final int THRESHOLD = 10; R:j mn
)sNPWn8<Uy
/* =3!o_
* (non-Javadoc) ".2d{B
* *f_A:`:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N,l"9>CF
*/ M8/:PmR<
public void sort(int[] data) { XUnw*3tPJ
int[] temp=new int[data.length]; (L yKo
mergeSort(data,temp,0,data.length-1); $x,EPRNs
} aNA]hl
Io[NN aF|
private void mergeSort(int[] data, int[] temp, int l, int r) { _3< P(w{
int i, j, k; qDU4W7|T`
int mid = (l + r) / 2; [P6m8%Y|s
if (l == r) p_X{'=SQ1
return; #Ge_3^'
if ((mid - l) >= THRESHOLD) i,S1|R
mergeSort(data, temp, l, mid); xaVn.&Wl
else r?!:%L
insertSort(data, l, mid - l + 1); BC\W`K
if ((r - mid) > THRESHOLD) "eqzn KT%u
mergeSort(data, temp, mid + 1, r); pb)kN%
else gS8+S\2
insertSort(data, mid + 1, r - mid); *,IK4F6>:
- Ry+WS=
for (i = l; i <= mid; i++) { ;<_a ,5\Q
temp = data; P$Oj3HD LM
} -/V(Z+dj
for (j = 1; j <= r - mid; j++) { E AZX
temp[r - j + 1] = data[j + mid]; e<*qaUI
} F-oe49p5e
int a = temp[l]; >\w]i*%
int b = temp[r]; vB}c6A4'U
for (i = l, j = r, k = l; k <= r; k++) { r7L.W
if (a < b) { GdY@$&z{i
data[k] = temp[i++]; v/=\(
a = temp; >^GV #z
} else { |:.Uw\z5'
data[k] = temp[j--]; 5[4nFa}R:5
b = temp[j]; C ocw%Yl
} 79D~Mau#
} t 7o4 aBl"
} ZO/u3&gU
e([>sAx!1
/** B\e*-:pq>
* @param data l#%7BGwzY
* @param l }WaZ+Mdg\
* @param i "qd|!:bE
*/ gPb.%^p
private void insertSort(int[] data, int start, int len) { >3@3~F%xAX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EwkSUA>Tm
} MtaGv#mJ
} ^m&I^\
} :8hI3]9
} Rb.vyQ
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堆排序： mC$y*G
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package org.rut.util.algorithm.support; q6w)zTpJGJ
~J&-~<%P}
import org.rut.util.algorithm.SortUtil; ;{L[1OP%e
`:*2TLxIk
/** 4(LLRzzW
* @author treeroot $#p5BQQ|
* @since 2006-2-2 6<$.Z-,
* @version 1.0 oBo*<6
*/ {it}\[3
public class HeapSort implements SortUtil.Sort{ tx~,7TMS/
~!qnKM>[
/* (non-Javadoc) BQ)>}YHk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W/hzo*o'g
*/ x,.=VB
public void sort(int[] data) { Qrg- xu=
MaxHeap h=new MaxHeap(); F8"J<VJ7
h.init(data); )E*f30
for(int i=0;i h.remove(); =CJ`0yDQ>
System.arraycopy(h.queue,1,data,0,data.length); }7(+#ISK6
} PfRA\
*1{A'`.=\
private static class MaxHeap{ v/9ZTd
GWWg3z.o"W
void init(int[] data){ mL2J
this.queue=new int[data.length+1]; :PW"7|c!
for(int i=0;i queue[++size]=data; $!MP0f\q g
fixUp(size); vI0,6fOd6
} 6?~9{0
} B=L!WGl<!
]oVP_ &E
private int size=0; #}+H
]xHiy+
private int[] queue; H-+U^@w
nJ]7vj,rB
public int get() { 4 ZnQpKg
return queue[1]; WA~[)S0
} $wp>2
-X!<$<\y;
public void remove() { ;!A8A4~nu
SortUtil.swap(queue,1,size--); Z@Zg3AVU
fixDown(1); q+9->D(6
} BVNJas
file://fixdown v_EgY2l(
private void fixDown(int k) { IDT\hTPIs
int j; g9|OhymB
while ((j = k << 1) <= size) { 5L[imOM0
if (j < size %26amp;%26amp; queue[j] j++; D]fuX|f~ul
if (queue[k]>queue[j]) file://不用交换 v:QUwW
break; n=V|NrU
SortUtil.swap(queue,j,k); ''@Tke3IG6
k = j; T` h%=u|D
} &)tiO>B^6
} G=|?aK{p
private void fixUp(int k) { 1F,U^O
while (k > 1) { Ig}hap]G
int j = k >> 1; 5=I({=/>
if (queue[j]>queue[k]) e'A_4;~@s
break; BInSS*L
SortUtil.swap(queue,j,k); //BJaWq
k = j; [|oG}'Xz
} x\8g ICf
} 4X]/8%]V
Ja:4EU$Lu
} QUn!&55
JX&]>#6|E
} m;l[flQ~
@9| jY1
SortUtil： npltsK):
4 H0rS'5d
package org.rut.util.algorithm; +_J@8k
F_'{:v1GW
import org.rut.util.algorithm.support.BubbleSort; )/@KdEA:
import org.rut.util.algorithm.support.HeapSort; fc@<'-VA
import org.rut.util.algorithm.support.ImprovedMergeSort; XjN=UhC
import org.rut.util.algorithm.support.ImprovedQuickSort; klnNBo!
import org.rut.util.algorithm.support.InsertSort; 94PI
import org.rut.util.algorithm.support.MergeSort; dxAGO(
import org.rut.util.algorithm.support.QuickSort; ,$:u^;V(
import org.rut.util.algorithm.support.SelectionSort; k- 9i
import org.rut.util.algorithm.support.ShellSort; nMzt_IlI
Hq 5#.rZ#
/** ejZ-A?f-K
* @author treeroot y,`n9[$K\
* @since 2006-2-2 =K}Pfh
* @version 1.0 X}(X\rp
*/ [-VH%OM
public class SortUtil { j!i*&
public final static int INSERT = 1; W7WHDL^
public final static int BUBBLE = 2; x)dLY.'|
public final static int SELECTION = 3; G<-KwGy,D
public final static int SHELL = 4; &,%n
public final static int QUICK = 5; JseKqJ?g
public final static int IMPROVED_QUICK = 6; aUZ?Ue9l>2
public final static int MERGE = 7; a5/, O4Q
public final static int IMPROVED_MERGE = 8; )jgz(\KZ
public final static int HEAP = 9; #rX^)2
ai$l7]7
public static void sort(int[] data) { eUQmW^
sort(data, IMPROVED_QUICK); ,4xNW:!j
} ,Ohhl`q(
private static String[] name={ `)y ;7%-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DSRc4|L
}; i4D]>
51|s2+GG
private static Sort[] impl=new Sort[]{ "rLm)$I
new InsertSort(), siCi+Y
new BubbleSort(), *uRDB9#9,
new SelectionSort(), E*5aLT5!,
new ShellSort(), P_0X+Tz
new QuickSort(), YQC.jnb2
new ImprovedQuickSort(), '6qH@r4Z<
new MergeSort(), fDns r"T
new ImprovedMergeSort(), 4N$Wpx
new HeapSort() Ur< (TM
}; Sy <E@1
elGBX h
public static String toString(int algorithm){ `PtB2,?
return name[algorithm-1]; dNf9,P_}
} +BtLd+)R
<tbs,lcw;
public static void sort(int[] data, int algorithm) { 6Zn[l,\
impl[algorithm-1].sort(data); uo]\L^j
} IrCl\HQN
qpe9?`vVX
public static interface Sort { _@XueNU1hS
public void sort(int[] data); )?SFIQ=
} q!0HsF
;hq_}.
public static void swap(int[] data, int i, int j) { ?3fnt"
int temp = data; Zj]tiN f\"
data = data[j]; 2*w`l|Sx
data[j] = temp; npkT>dB+
} t=Rl`1=(K
} 3Y)z{o>P