[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; C\EV$U,
} r%TgZ5~u
int i1=l; BH%eu 7`t
int i2=mid+1; tR2IjvmsX
for(int cur=l;cur<=r;cur++){ Q*U$i#,
if(i1==mid+1) JY%c<
data[cur]=temp[i2++]; W~DY-;
else if(i2>r) yNI}=Z
data[cur]=temp[i1++]; rY($+O@a<
else if(temp[i1] data[cur]=temp[i1++]; %iF< px?Vc
else qY0GeE>N
data[cur]=temp[i2++]; "4L' 2w+
} ZRcY; ?
} }vcC4 =t/
KZ<zsHX8H
} +]*?J1Y8Z
rEZa%)XJ
改进后的归并排序: HM--`RJ
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package org.rut.util.algorithm.support; f3*u_LO
#msk'MVt
import org.rut.util.algorithm.SortUtil; =|uX?
ZmYp!B_~
/** 9h~>7VeZ)
* @author treeroot A!@D }n
* @since 2006-2-2 \Fc"Q@.u
* @version 1.0 VN;Sz,1Z
*/ q=|>r n_
public class ImprovedMergeSort implements SortUtil.Sort { {$Fg+~
Xt9?7J#\T
private static final int THRESHOLD = 10; %.[GR
KWhw@y-5j@
/* eGnc6)x@C
* (non-Javadoc) 0}HKmEM
* knF *~O :y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #CVD:p
*/ uKtrG,/ p
public void sort(int[] data) { 875V{fvPBU
int[] temp=new int[data.length]; c+-L>dsss
mergeSort(data,temp,0,data.length-1); WvNX%se]3
} QbpRSdxy`$
m",$M>
private void mergeSort(int[] data, int[] temp, int l, int r) { d<: VoQM6M
int i, j, k; ae#7*B
int mid = (l + r) / 2; {f)",#
if (l == r) {P-KU RQ
return; blxH`O!
if ((mid - l) >= THRESHOLD) _.wLQL~y
mergeSort(data, temp, l, mid); [YJP
else 7c<2oTN'
insertSort(data, l, mid - l + 1); #p*OLQ3~
if ((r - mid) > THRESHOLD) }GQ8|fg`U
mergeSort(data, temp, mid + 1, r); ^K&&O{
else t~XwF(";
insertSort(data, mid + 1, r - mid); a<c %Xy/
`^(6{p ?
for (i = l; i <= mid; i++) { UHweV:(|T
temp = data; 8pt;''
} rN}{v}n
for (j = 1; j <= r - mid; j++) { RR^I*kRH
temp[r - j + 1] = data[j + mid]; 0B1*N_.L@
} >iWl-hI-
int a = temp[l]; Wc03Sv&FZ
int b = temp[r]; r~TiJ?8I
for (i = l, j = r, k = l; k <= r; k++) { hGD7/qTN
if (a < b) { ':F{st>&H
data[k] = temp[i++]; *1}9`$
a = temp; "D8xHHb
} else { uXu'I
data[k] = temp[j--]; q^Oq:l$s
b = temp[j]; N$?mula
} 7P:0XML}
} Yq<D(F#qx
} :]e:-JbT4z
OFCkQEG=y>
/** QQ1+uY
* @param data ;STO!^9~
* @param l |~rDEv3
* @param i 3"!2C,3c#
*/ )!p=0&z@{
private void insertSort(int[] data, int start, int len) { 1OE^pxfi>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &RpQ2*4n
} A CJmy2
} BJ~Q\Si6
} ~F>oNbJIv
} kzgHp,;R{
)v8;\1`s:
堆排序： u ldea)
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package org.rut.util.algorithm.support; c3i|q@ k
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import org.rut.util.algorithm.SortUtil; ^/mQo`[G
~>xn9vb=
/** 0xIr:aFF
* @author treeroot Lm:O vVVB
* @since 2006-2-2 B,|M
* @version 1.0 Yca9G?^\v
*/ 7Cp>iWV
public class HeapSort implements SortUtil.Sort{ {HvR24#
Af ^6
/* (non-Javadoc) bo\|mvB~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W&BwBp]K
*/ %w6> 3#e
public void sort(int[] data) { CG$S?
MaxHeap h=new MaxHeap(); / D#vs9S
h.init(data); 241YJ
for(int i=0;i h.remove(); SU2(XP]5
System.arraycopy(h.queue,1,data,0,data.length); (al7/EhY
} fZxZ):7i
Nr3td`;
private static class MaxHeap{ %v :a
: gv[X
void init(int[] data){ aW4tJN%!
this.queue=new int[data.length+1]; o(C({]UO/
for(int i=0;i queue[++size]=data; -(Taj[;[
fixUp(size); /2Y Nu*v
} 1S0Hc5vw
} J0mY=vX
w0^(jMQe^
private int size=0; *G>V`||RW
Q gDjc'
private int[] queue; PFUb\AY
~ E>D0o
public int get() { k;;?3)!
return queue[1]; zUIh8cAoE
} ZUAWSJ,s
sB-c'`,w`
public void remove() { 0ydAdgD
SortUtil.swap(queue,1,size--); eey <:n/Z
fixDown(1); yTkYPx
} bN<c5
file://fixdown d7$H})[^
private void fixDown(int k) { T*-*U/
int j; @\u)k
while ((j = k << 1) <= size) { %jKR\f G
if (j < size %26amp;%26amp; queue[j] j++; @Eqc&v!O
if (queue[k]>queue[j]) file://不用交换 <s]K~ Vo
break; ,^:Zf|V
SortUtil.swap(queue,j,k); Xdq2.:\
k = j; T1\Xz-1
} }_@cqx:n^
} 6:ZqS~-
private void fixUp(int k) { #}:VZ2Z
while (k > 1) { "g>uNtt~
int j = k >> 1; ( F0.lDZ
if (queue[j]>queue[k]) sjWhtd[fgG
break; 2"yzrwZ:
SortUtil.swap(queue,j,k); 7ABHgw~?8r
k = j; V\!FD5%
} p^5B_r:
} xm/v:hl=
}@SZ!-t%rD
} ~k|~Q\
sZ]O&Za~
} mZ ONxR6q$
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SortUtil： XOJ/$y
Crm](Z?
package org.rut.util.algorithm; QRgWzaI
C&zgt :q6}
import org.rut.util.algorithm.support.BubbleSort; z})H$]:$
import org.rut.util.algorithm.support.HeapSort; 1g2%f9G
import org.rut.util.algorithm.support.ImprovedMergeSort; 7&'^H8V
import org.rut.util.algorithm.support.ImprovedQuickSort; @hQ+pG@s
import org.rut.util.algorithm.support.InsertSort; kH-1l>":
import org.rut.util.algorithm.support.MergeSort; ZMg%/C
import org.rut.util.algorithm.support.QuickSort; TLPy/,
import org.rut.util.algorithm.support.SelectionSort; JjyQ
import org.rut.util.algorithm.support.ShellSort; { tim{nV
XMa(XOnX
/** gigDrf}
* @author treeroot >(`|oD`,Y
* @since 2006-2-2 HP*x?|4
* @version 1.0 jR}h3!
*/ 1#aOgvf
public class SortUtil { >~>=[M0
public final static int INSERT = 1; &AUL]:<s
public final static int BUBBLE = 2; s:jr/ j!
public final static int SELECTION = 3; !i.`m-J*
public final static int SHELL = 4; 7bQ#M )}
public final static int QUICK = 5; #9#N+
public final static int IMPROVED_QUICK = 6; j 7a;g7.
public final static int MERGE = 7; N#Qby4w >
public final static int IMPROVED_MERGE = 8; , $78\B^
public final static int HEAP = 9; ^^3 >R`
i.0}qS?
public static void sort(int[] data) { `@")R-
sort(data, IMPROVED_QUICK); s-*8=
} YPf&y"E&H
private static String[] name={ %DgU
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" XH1so1h
}; 04WKAP'c N
pOlQOdl
private static Sort[] impl=new Sort[]{ fHlmy[V+M
new InsertSort(), 67/hhO
new BubbleSort(), 2EQ:mjxk
new SelectionSort(), rM=Q.By+\
new ShellSort(), |+x;18
new QuickSort(), - FA#hUK$
new ImprovedQuickSort(), u2-%~Rlo
new MergeSort(), |+cyb<(V J
new ImprovedMergeSort(), <ynmA
new HeapSort() /D 2v1
}; YOP=gvZq
i. `S0
public static String toString(int algorithm){ W*`2lf
return name[algorithm-1]; P[#V{%f*5
} SZ1+h TY7d
:g+R}TR[i
public static void sort(int[] data, int algorithm) { p,]Hs{R
impl[algorithm-1].sort(data); YUM%3
} 2ai \("?
S>*i^If
public static interface Sort { i?4vdL8M
public void sort(int[] data); c.KpXY
} KB*[b
#E{OOcM
public static void swap(int[] data, int i, int j) { ldI;DoE#U1
int temp = data; G?'L1g[lc
data = data[j]; }4A+J"M4y
data[j] = temp; m`4Sp#m
} +)L 'qbCSM
} S[X bb=n