[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; 2CcUClP$
} ix2V?\
int i1=l; U:"X *
int i2=mid+1; yNCd} 4Ym5
for(int cur=l;cur<=r;cur++){ /9T.]H~
if(i1==mid+1) Cw6\'p%l-\
data[cur]=temp[i2++]; 4eH:eCZze
else if(i2>r) .8Eh[yiln
data[cur]=temp[i1++]; ""$vaqt
else if(temp[i1] data[cur]=temp[i1++]; ]Fi_v?42x
else C.qNBl*
data[cur]=temp[i2++]; s^f7w
} T_iX1blrgh
} 4Z8FLA+T,
U'~M(9uv:
} 4z<nJOEh[
9o%k [n
改进后的归并排序: 'Ur1I"
FZL"[3
package org.rut.util.algorithm.support; eX)'C>4W
ZHu"&&
import org.rut.util.algorithm.SortUtil; uoJ@Jt'j
uuHg=8(
/** Qa`+-Wu8
* @author treeroot m\zCHX#n
* @since 2006-2-2 lw+54lZX|
* @version 1.0 9w3KAca
*/ ^wass_8
public class ImprovedMergeSort implements SortUtil.Sort { 2P35#QI[)
/{6&99SJcc
private static final int THRESHOLD = 10; ,GeW_!Q[
8'WoG]E_
/* {L'uuG\9U
* (non-Javadoc) q@i>)nC R
* ^8.s"4{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,FIG5-e,}
*/ Vh?5
public void sort(int[] data) { w{8O$4 w
int[] temp=new int[data.length]; %Ev)Hk
mergeSort(data,temp,0,data.length-1); Kz~E"?
} >o:y.2yCe
vzX%x ul
private void mergeSort(int[] data, int[] temp, int l, int r) { h 8<s(WR
int i, j, k; /07iQcT(
int mid = (l + r) / 2; Cl6P,C
if (l == r) w`GjQIA
return; [L>mrHqG
if ((mid - l) >= THRESHOLD) \h>6k
mergeSort(data, temp, l, mid); "]T1DG"
else /'4]"%i%3
insertSort(data, l, mid - l + 1); %45*DT
if ((r - mid) > THRESHOLD) ffW-R)U|3
mergeSort(data, temp, mid + 1, r); %MCJ%Ph
else h[bC#(
insertSort(data, mid + 1, r - mid); qWU59:d^{
;fYJ]5>
for (i = l; i <= mid; i++) { z? Iu;X
temp = data; 3qQ}U}-;|
} EG8%X"p
for (j = 1; j <= r - mid; j++) { o\<JG?P
temp[r - j + 1] = data[j + mid]; o)wOXF
} |w"G4J6ha
int a = temp[l]; e/uLBZ
int b = temp[r]; hbe";(
for (i = l, j = r, k = l; k <= r; k++) { m2%n:
if (a < b) { 1! j^
data[k] = temp[i++]; :IO"' b
a = temp; ov5g`uud
} else { 6<%b}q9Mo
data[k] = temp[j--]; ! o?E.
b = temp[j]; %CZGV7JdA
} _1jbNQa
} q>s`G
} CHi t{ @9
+y_V$q$G
/** A4*D3\>%u
* @param data 29nMm>P.e
* @param l .NJ Ne
* @param i y(*5qa<>
*/ wHZ(=z/q
private void insertSort(int[] data, int start, int len) { Vp1Q^`a{G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uF ;8B]"
} , {}S<^?]
} %EYh*g{G
} 8PqlbLo1
} =eR#]d
xouBBb=
堆排序： cR&d=+R&
aI;fNy/K
package org.rut.util.algorithm.support; 5k c?:U&
k!T-X2L=
import org.rut.util.algorithm.SortUtil; 3t5WwrNh
M=fhRCUB
/** @.=2*e.z|b
* @author treeroot -dw/wHf"
* @since 2006-2-2 Bnz}:te}
* @version 1.0 uG/bCb+V
*/ ?btX&:j2P
public class HeapSort implements SortUtil.Sort{ qL$\[(
;[7#h8
/* (non-Javadoc) rW)}$|-Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BA9;=orx
*/ ?i\$U'2*z3
public void sort(int[] data) { 5r0Sl89J
MaxHeap h=new MaxHeap(); QvzE:]pyi
h.init(data); ?U,XyxN
for(int i=0;i h.remove(); o{7w&Pgs2
System.arraycopy(h.queue,1,data,0,data.length); t&C0V|s79$
} 9Z:pss@
9x14I2
private static class MaxHeap{ CelM~W$=u
V'AZs;
void init(int[] data){ (DM8PtZg
this.queue=new int[data.length+1]; K&&YxX~3
for(int i=0;i queue[++size]=data; .Pa6HA !
fixUp(size); ?osYs<k \
} ,f .#-
} E;r~8^9)
2!a~YT
private int size=0; aVn+@g<.
Bn Nu/02.=
private int[] queue; 0[s<!k9=
Bs-MoT!
public int get() { Z.0mX#
return queue[1]; h-@_.&P0e
} &^ =Y76
jAD{?/RB}
public void remove() { M'xG.'
SortUtil.swap(queue,1,size--); 4hV~ ir
fixDown(1); CHM+@lD
} %[m%QP1;p
file://fixdown G]I^zd&P
private void fixDown(int k) { h{Y#. j~aS
int j; v?4MndR
while ((j = k << 1) <= size) { SVT'fPm1M
if (j < size %26amp;%26amp; queue[j] j++; <V*M%YWs
if (queue[k]>queue[j]) file://不用交换 J]Qbg7|
break; nIqmora
SortUtil.swap(queue,j,k); v&u8Ks
k = j; UyOoyyd.
} t-w4rXvF
} N:rnH:g+:
private void fixUp(int k) { yl~h `b4
while (k > 1) { n]%yf9,w
int j = k >> 1; _6'HBE
if (queue[j]>queue[k]) %-[U;pJe;
break; 1)h+xY
SortUtil.swap(queue,j,k); Y&`nB,'
k = j; wz5*?[4
} @&]%%o+
} ,46k8%WW
SN|:{Am
} 54, (;
]+i~Cbj
} V$<5`
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SortUtil： J;7O`5J
s:#\U!>0`
package org.rut.util.algorithm; D.R 7#^.
n6 a=(T
import org.rut.util.algorithm.support.BubbleSort; )%&~CW+
import org.rut.util.algorithm.support.HeapSort; y2,M9
import org.rut.util.algorithm.support.ImprovedMergeSort; )F) (Hg
import org.rut.util.algorithm.support.ImprovedQuickSort; S-k:+4
import org.rut.util.algorithm.support.InsertSort; 5m&Zq_Qe
import org.rut.util.algorithm.support.MergeSort; {z/Y~rf
import org.rut.util.algorithm.support.QuickSort; X,8]g.<
import org.rut.util.algorithm.support.SelectionSort; |\MgE.N
import org.rut.util.algorithm.support.ShellSort; uDpCW}
&udlt//^%
/** O o+pi$W
* @author treeroot 7}e73
* @since 2006-2-2 ("B[P/
* @version 1.0 5L4{8X0X8
*/ ? @Y'_f
public class SortUtil { Q-}yZ
public final static int INSERT = 1; &{c.JDO
public final static int BUBBLE = 2; 9I;d>%
public final static int SELECTION = 3; d}t7bgk'j
public final static int SHELL = 4; ub/9T-#l
public final static int QUICK = 5; ?W(>Yefk
public final static int IMPROVED_QUICK = 6; $ RDwy)9
public final static int MERGE = 7; OF)G2>t
public final static int IMPROVED_MERGE = 8; 58@YWvAk
public final static int HEAP = 9; RHc-kggk!
sV))Z2sq
public static void sort(int[] data) { M_wj>NXZ
sort(data, IMPROVED_QUICK); LzW8)<N
} OIMsxXF\J
private static String[] name={ 8(Ab NQ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 5QR=$?K
}; \qAg]-
uoM;p'
private static Sort[] impl=new Sort[]{ #ONad0T;
new InsertSort(), 1sqBBd"=PY
new BubbleSort(), 5mxYzu;#]
new SelectionSort(), ebSG|F
new ShellSort(), 6{ql.2 Fa
new QuickSort(), T5g}z5~"
new ImprovedQuickSort(), 0#AS>K5
new MergeSort(), bZE;}d
new ImprovedMergeSort(), s^{hdCCl67
new HeapSort() y\Z$8'E5W
}; &?R2zfcM
Stkyz:,(
public static String toString(int algorithm){ `m.).Hda
return name[algorithm-1]; arR9uxP
} <,r|*pkhp~
UbD1h_b
public static void sort(int[] data, int algorithm) { )]/gu\90
impl[algorithm-1].sort(data); mUmU_L u8
} #E?TE
aL9yNj}2
public static interface Sort { ] rP^
public void sort(int[] data); PgeC\#;9
} Q M#1XbT
Z r}5)ZR.
public static void swap(int[] data, int i, int j) { Tq\S-K}4!
int temp = data; A{[joo
data = data[j]; f4JmY1)@
data[j] = temp; cjf 8N:4N0
} Kw`{B3"
} Q]9+-p(=