[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; `<}Q4p
} dV_ClH &)
int i1=l; ECq(i(
int i2=mid+1; _J' _9M?>
for(int cur=l;cur<=r;cur++){ AXbDCDA
if(i1==mid+1) jx*jYil
data[cur]=temp[i2++]; -.XICKz
else if(i2>r) J@$h'YUF
data[cur]=temp[i1++]; -qv*%O@
else if(temp[i1] data[cur]=temp[i1++]; <0R$yB
else 7Aj o9
data[cur]=temp[i2++]; >/W
} PHZ+u@AA6@
} {,V.IDs8[
%+BiN)R*x
} ~MuD`a7#G
s#phs`v
改进后的归并排序: t]dtBt].:
A5U//y![{
package org.rut.util.algorithm.support; S}QvG&c
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import org.rut.util.algorithm.SortUtil; Ph{7S43
=v-qao7xCV
/** ."HDUo2D7
* @author treeroot E]T>m!6
* @since 2006-2-2 nd~cpHQR^
* @version 1.0 zn!H&!8&
*/ w +pK=R
public class ImprovedMergeSort implements SortUtil.Sort { &d5n_:^
K=S-p3\g
private static final int THRESHOLD = 10; J3 Y-d7=|
H]i.\2z
/* bA/,{R
* (non-Javadoc) /=o~7y
* Pn&!C*,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G)<NzZo
*/ x?5D>M/Y
public void sort(int[] data) { {Y0Uln5u
int[] temp=new int[data.length]; F?h{IH f
mergeSort(data,temp,0,data.length-1); {0~ Sj%Ze
} }K<% h
I[P43>F3
private void mergeSort(int[] data, int[] temp, int l, int r) { Ii*tux!S
int i, j, k; 1W@ C]n4
int mid = (l + r) / 2; k 5~#_D>
if (l == r) Q:nBx[%
return; 0j@nOj(3
if ((mid - l) >= THRESHOLD) #ZzFAt
mergeSort(data, temp, l, mid); W>^WNo3YQ$
else yf 7Sz$Eq
insertSort(data, l, mid - l + 1); ">-J+ST%
if ((r - mid) > THRESHOLD) */8b)I}yY
mergeSort(data, temp, mid + 1, r); OD;-0Bj
else 2=?:(e9
insertSort(data, mid + 1, r - mid); fv;3cxQp
|<:Owd=
for (i = l; i <= mid; i++) { U"SH fI:
temp = data; ,}8|[)"
} G0e]PMeFl
for (j = 1; j <= r - mid; j++) { 06)B<
temp[r - j + 1] = data[j + mid]; q4Rvr[
} 1$+-?:i C
int a = temp[l]; CP5vo-/)-
int b = temp[r]; x-hr64WFK
for (i = l, j = r, k = l; k <= r; k++) { /y2)<{{I
if (a < b) { ,RA;X
data[k] = temp[i++]; jUtFDw
a = temp; VXfp=JE
} else { F'NX
data[k] = temp[j--]; uD'GI
b = temp[j]; u*W6fg/"
} /Soc,PjZ
} Bz7rf^H`Z
} G@.TE7a2Z
bi:TX<K+
/** Ne!0`^`~
* @param data .()|0A B&g
* @param l 6jDHA3
* @param i PN(P$6
*/ 7{"urs7 T
private void insertSort(int[] data, int start, int len) { 3zr95$Mt
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); t9C.|6X
} XA1gV>SJ
} ~4T:v_Q7g
} ulA||
} 3?n2/p 7=
AlVBhR`
堆排序： Q;h6F{i
vV(?A
package org.rut.util.algorithm.support; }=7? & b
2:8p>^g=
import org.rut.util.algorithm.SortUtil; CyHaFUbZ
_NwB7@ e
/** D#8uj=/%
* @author treeroot z\kiYQ6kA
* @since 2006-2-2 /Wx({N'h$
* @version 1.0 U8||)+
*/ VGe OoS
public class HeapSort implements SortUtil.Sort{ $\9M6k'
CogN1,GJ
/* (non-Javadoc) +N3f{-{"Yo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X~o6Xkg
*/ _Hp[}sv4)
public void sort(int[] data) { G\PFh&
MaxHeap h=new MaxHeap(); ]YF_c,Q
h.init(data); y\C_HCU H
for(int i=0;i h.remove(); $sfDtnRy
System.arraycopy(h.queue,1,data,0,data.length); *vqr+jr9
} 0t^Tm0RzH
eBN!!Y:7
private static class MaxHeap{ P {0iEA|k
9f|+LN##
void init(int[] data){ F<YXkG4pO
this.queue=new int[data.length+1]; ||}'
for(int i=0;i queue[++size]=data; rFJPeK7
fixUp(size); DI)!x {"
} t ;-U
} X<8
mne?r3d
private int size=0; #X`qkW.T<
C1M @;
private int[] queue; .7`c(9<
S^zt>
public int get() { p~evPTHnrX
return queue[1]; \46 'j.
} xIb"8,N
->u}b?aF
public void remove() { cH7Gb|,M
SortUtil.swap(queue,1,size--); yh'uH
fixDown(1); kc:>[{9
} [" PRxl
file://fixdown YD@n8?~$$
private void fixDown(int k) { b"PRa|]
int j; {;2Gl$\r
while ((j = k << 1) <= size) { D=^|6}
if (j < size %26amp;%26amp; queue[j] j++; i^Ip+J+[
if (queue[k]>queue[j]) file://不用交换 kp=wz0#
break; ?]]7PEee*
SortUtil.swap(queue,j,k); 0;/},B[A
k = j; XD8Q2un
} sWGc1jC?.F
} GU,ztO.w3
private void fixUp(int k) { ?E6C|A$I
while (k > 1) { cq0#~20
int j = k >> 1; +\yQZ{4'@
if (queue[j]>queue[k]) -"}mmTa*<
break; Q|] 9
SortUtil.swap(queue,j,k); mh:eUFe
k = j; ^!j,d_)b!
} ui!MQk+D9
} `%<^$Ng;
~6!TMVr
} 5f-eWW]!
tXg>R _\C
} L Rn)
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SortUtil： VQ(l=k:}2
i9=*ls^Cx
package org.rut.util.algorithm; $8;`6o`
D"vl$BX
import org.rut.util.algorithm.support.BubbleSort; RK\$>KFE
import org.rut.util.algorithm.support.HeapSort; nN*:"F/^
import org.rut.util.algorithm.support.ImprovedMergeSort; av:9kPKm
import org.rut.util.algorithm.support.ImprovedQuickSort; `;v5o4.`
import org.rut.util.algorithm.support.InsertSort; *,y .%`o
import org.rut.util.algorithm.support.MergeSort; 7@u:F?c
import org.rut.util.algorithm.support.QuickSort; 8Ben}j)H
import org.rut.util.algorithm.support.SelectionSort; =P)H3|AdIm
import org.rut.util.algorithm.support.ShellSort; abw7{%2
d#Xt2
/** (d?sFwOt\
* @author treeroot |<Rf^"T
* @since 2006-2-2 ]dU/;8/%
* @version 1.0 uk<JV*R=
*/ T~G~M/
public class SortUtil { tEl_a~s*3?
public final static int INSERT = 1; a`E1rK'
public final static int BUBBLE = 2; =&-+{txs
public final static int SELECTION = 3; iRsK;)<
public final static int SHELL = 4; '^ob3N/Y [
public final static int QUICK = 5; xL#UMvZ>;h
public final static int IMPROVED_QUICK = 6; +/|t8zFWs
public final static int MERGE = 7; Bf+7;4-
public final static int IMPROVED_MERGE = 8; s+7#TdhA
public final static int HEAP = 9; UR'P,
rL3 f%L
public static void sort(int[] data) { G\ m`{jv
sort(data, IMPROVED_QUICK); i8+[-mh
} tO8<N'TD
private static String[] name={ /5&'U!:+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 90[?)s
}; & G8tb>q<V
#Ks2a):8
private static Sort[] impl=new Sort[]{ N799@:.
new InsertSort(), $^ZugD
new BubbleSort(), oJln"-M1nx
new SelectionSort(), WJs2d73Qp
new ShellSort(), 72akOx
new QuickSort(), ])D39
new ImprovedQuickSort(), 79G& 0 P\
new MergeSort(), 6ntduXeNVh
new ImprovedMergeSort(), ]zUvs6ksLG
new HeapSort() TBr@F|RXiO
}; d"~-D;
{~a+dEz
public static String toString(int algorithm){ 4O1[D?)`x
return name[algorithm-1]; E(/M?>t-
} 9TZ4ffXV*
,#blY~h8^
public static void sort(int[] data, int algorithm) { ffgb3
impl[algorithm-1].sort(data); O$,bNu/g
} rJws#^]
z]33_[G1U
public static interface Sort { 1_V',0|`>
public void sort(int[] data); :I/i"g7<
} QsC6\Gt#
_7P#?:h
public static void swap(int[] data, int i, int j) { rFl6xM;F
int temp = data; n[tES6u
data = data[j]; H;k-@J
data[j] = temp; 9S! 2r
} Di>B:=
} /+g)J0u