[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; /P]N40_@
} ?(Plb&kR
int i1=l; O2 + K
int i2=mid+1; vfmY>nr
for(int cur=l;cur<=r;cur++){ 7#9%,6Yi
if(i1==mid+1) $T7 qd
data[cur]=temp[i2++]; Nvh&=%{g
else if(i2>r) 15' fU!
data[cur]=temp[i1++]; Z6Kp-z(l3
else if(temp[i1] data[cur]=temp[i1++]; >*!^pbZfX
else mU]^PC2[
data[cur]=temp[i2++]; }ALli0n`V)
} 9zCuVUcd$.
} G^dzE/:
%4YSuZg
} tw\1&*:
m^TN6/])
改进后的归并排序: pm:-E(3#
2*Pk1vrI
package org.rut.util.algorithm.support; co^h2b
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import org.rut.util.algorithm.SortUtil; ,]]IJ;:w
)vVf- zU
/** y+{)4ptg$<
* @author treeroot h5-yhG
* @since 2006-2-2 YmjA!n
* @version 1.0 hJir_=
*/ 3/]FT#l]i
public class ImprovedMergeSort implements SortUtil.Sort { y"U)&1 c%
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private static final int THRESHOLD = 10; ?<8c
\n^[!e"`
/* 5dD8s-;^T
* (non-Javadoc) /<(-lbq,
* 87eH~&<1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h/8p2Mrqi
*/ VhAJ1[k4!
public void sort(int[] data) { pQC|_T#u
int[] temp=new int[data.length]; s| Q1;%Tj
mergeSort(data,temp,0,data.length-1); nXI8`7D
} c813NHW
~ L>M-D4o
private void mergeSort(int[] data, int[] temp, int l, int r) { +o"CMI
int i, j, k; ;#0$iE
int mid = (l + r) / 2; D.x8=|;
if (l == r) gNA!)}m\
return; e+4Eiv
if ((mid - l) >= THRESHOLD) Z5)v
mergeSort(data, temp, l, mid); EYCZuJxv
else EVw{G<
insertSort(data, l, mid - l + 1); D<<q5gG
if ((r - mid) > THRESHOLD) Wv;,@xTZ
mergeSort(data, temp, mid + 1, r); ?.lo[X<,*
else KtH^k&z.f
insertSort(data, mid + 1, r - mid); qK9A /Mc
d~h;|Bl[
for (i = l; i <= mid; i++) { pLV %g#h
temp = data; |3Oyg?2
} t imY0fx#
for (j = 1; j <= r - mid; j++) { yx:+Xy*N
temp[r - j + 1] = data[j + mid]; Y5;afU='
} tLq]#9kL
int a = temp[l]; U[8F{LX
int b = temp[r]; ^&8hhxCPu|
for (i = l, j = r, k = l; k <= r; k++) { {~s\a2YH
if (a < b) { I;eoy,
data[k] = temp[i++]; eO*s,*
a = temp; RO%M9LISI
} else { !y'>sAf
data[k] = temp[j--]; Ht\2 IP
b = temp[j]; "Jg.)1Jw
} H270)Cwn+
} [^6z>
} J]{<Z?%
2 >j0,2
/** YPNW%N!$|
* @param data -/0\_zq7
* @param l Q4a7g$^
* @param i bqp^\yu-E
*/ $8AW
private void insertSort(int[] data, int start, int len) { $|3zsi2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3]9Rmx
} -"i$^Q`
} wAX;)PLg
} ">eled)O
} !IO\g"y~|%
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堆排序： [{[m)Z^
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package org.rut.util.algorithm.support; 37Q8Yf_
llWY7u"
import org.rut.util.algorithm.SortUtil; 1EC;t1.7
HuU$x;~
/** z\" .(fIV
* @author treeroot tY!l}:E[
* @since 2006-2-2 udBIEW,`
* @version 1.0 J[hmY=,
*/ 'g'RXC}D>
public class HeapSort implements SortUtil.Sort{ .s!0S-RkC
'-[hy>t
/* (non-Javadoc) Z~8%bfpe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &NoA, `|7
*/ WWZ<[[ >
public void sort(int[] data) { (FaYagD
MaxHeap h=new MaxHeap(); =s]2?m
h.init(data); bM:4i1Z
for(int i=0;i h.remove(); x;E/
System.arraycopy(h.queue,1,data,0,data.length); 0R[fH
} XBkaum4j
[6JDS;MIN
private static class MaxHeap{ 0j6b5<Gpc*
c ^.^5@
void init(int[] data){ d,(q3
this.queue=new int[data.length+1]; Fw{@RQf8
for(int i=0;i queue[++size]=data; .35~+aqC
fixUp(size); V\{@c%xW
} ?< teHFj
} ]sL.+.P
Y;huTZ
private int size=0; k}&wy
Ka-o$o[^u`
private int[] queue; JehanF[
F~ \ONO5
public int get() { hif;atO
return queue[1]; YlGUd~$`"+
} ort*Ux)
V:J|shRo
public void remove() { q0Q[]|L
SortUtil.swap(queue,1,size--); "RK"Pn+
fixDown(1); .ve_If-Hg
} 7vFmB
file://fixdown U]vUa^nG
private void fixDown(int k) { .PVYYhrt
int j; Y9<[n)>+
while ((j = k << 1) <= size) { +ZW>JjP*
if (j < size %26amp;%26amp; queue[j] j++; iQ8{N:58DN
if (queue[k]>queue[j]) file://不用交换 -Pt E+R[A
break; RH _b
SortUtil.swap(queue,j,k); h@=@ fa
k = j; 9"+MZ$
} :f39)g5>
} 6'/Zq
private void fixUp(int k) { aY(s &
while (k > 1) { ]?D$n
int j = k >> 1; SM RKEPwp&
if (queue[j]>queue[k]) g|?}a]G
break; 5YNAb/!!F
SortUtil.swap(queue,j,k); "N=$=Dy>
k = j; ]wEI*c(
} JmK )Y# A
} %M'`K
wzwv>@}
} a6./;OC
Ib{l$#
} ?&eS}skL
0[%{YmI{W
SortUtil： Cy6!?Mik
w`f66*@Q1
package org.rut.util.algorithm; :LNZC,-f}5
U2<q dknB
import org.rut.util.algorithm.support.BubbleSort; @YH>|{S&
import org.rut.util.algorithm.support.HeapSort; 4_j_!QH87
import org.rut.util.algorithm.support.ImprovedMergeSort; ov,
import org.rut.util.algorithm.support.ImprovedQuickSort; BF gxa#De
import org.rut.util.algorithm.support.InsertSort; S}U_uZ$b
import org.rut.util.algorithm.support.MergeSort; Y 'X!T8
import org.rut.util.algorithm.support.QuickSort; "i/GzD7`n
import org.rut.util.algorithm.support.SelectionSort; (UjaL@G
import org.rut.util.algorithm.support.ShellSort; yGt[Qvx#
Ew PJ|Z^
/** 1 Vt,5o5
* @author treeroot !wpK +.D
* @since 2006-2-2 yLfyLyO L
* @version 1.0 E Zf|>^N
*/ 9D=X3{be#
public class SortUtil { D3dh,&KO\
public final static int INSERT = 1; Bl6I@w
public final static int BUBBLE = 2; s-Yu(X2
public final static int SELECTION = 3; T3 ie-G@<
public final static int SHELL = 4; ,"#nJC
public final static int QUICK = 5; hf9i%,J
public final static int IMPROVED_QUICK = 6; )z74,n7-
public final static int MERGE = 7; 4vG-d)"M2
public final static int IMPROVED_MERGE = 8; exiu;\+j
public final static int HEAP = 9; VgYy7\?p
fDB.r$|d
public static void sort(int[] data) { 4C_1wk('
sort(data, IMPROVED_QUICK); 5!Y\STn
} Wc+(xk
private static String[] name={ :KX*j$5U
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F#<:ZByjJ@
}; 2D"my]FnF
`V V>AA5
private static Sort[] impl=new Sort[]{ iz/CC V L
new InsertSort(), |&MoQxw@
new BubbleSort(), TK' 5NM+4
new SelectionSort(), af>i
new ShellSort(), rqN+0CT
new QuickSort(), ,#,K_oz
new ImprovedQuickSort(), ?87\_wL/j
new MergeSort(), Vfy@?x= &
new ImprovedMergeSort(), p7`9 d1n
new HeapSort() _/>I-\xWA
}; &0Y |pY
a-,*iK{_u
public static String toString(int algorithm){ -YQS\@?
return name[algorithm-1]; ;k#_/c
} RbxQTM_:M
e> 9X
public static void sort(int[] data, int algorithm) { 7lwI]/ZH*
impl[algorithm-1].sort(data); ti9e(Jt!O
} bIBF2m4
iH-,l
public static interface Sort { DPW^OgL;
public void sort(int[] data); Lc}hjK
} L7rr/D
5TuwXz1v
public static void swap(int[] data, int i, int j) { e#mf{1&
int temp = data; `{Oqb
data = data[j]; Wq}6RdY$ZA
data[j] = temp; }\8-&VoY#X
} 6o6yx:
} fI0"#iv}