[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; O_ $zK
} [z;}^3b
int i1=l; m*7RC4"J
int i2=mid+1; 23bTCp.d
for(int cur=l;cur<=r;cur++){ A~0yMww:$
if(i1==mid+1) hS%oQ)zvE
data[cur]=temp[i2++]; lPA}06hU
else if(i2>r) Ts=TaRwWf
data[cur]=temp[i1++]; \qG` ts
else if(temp[i1] data[cur]=temp[i1++]; {Rxb_9
else rJ6N'vw>
data[cur]=temp[i2++]; (X2[}K
} XA69t2J~F
} Ne1W!0YLK
aE:$ N#|Qa
} Wn2J]BH
jEP'jib%
改进后的归并排序: =6fJUy^M\
H:z<]Rc
package org.rut.util.algorithm.support; UhU+vy6)/
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import org.rut.util.algorithm.SortUtil; t|UM2h
c,G[Rk
/** VIod6Vk
* @author treeroot K[9P{0hA
* @since 2006-2-2 {e[~1]j3
* @version 1.0 o> 1+m
*/ [8WG
public class ImprovedMergeSort implements SortUtil.Sort { ?xQm_ 91X^
9:E.Iy
private static final int THRESHOLD = 10; 4a.8n!sys
\y7\RV>>3b
/* Oo>Uu{{
* (non-Javadoc) Jep/%cT$w
* f/,8sGkX;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qyY/:&E,Z
*/ n2'XWbMaL
public void sort(int[] data) { criNeKa
int[] temp=new int[data.length]; kp)1s>c
mergeSort(data,temp,0,data.length-1); [4PiQyr
} q((%sWp
X:(t,g*7
private void mergeSort(int[] data, int[] temp, int l, int r) { ZNDjk
int i, j, k; T{'oR .g,
int mid = (l + r) / 2; z<cPy)F]"
if (l == r) "1Y DT-I"
return; s|:j~>53
if ((mid - l) >= THRESHOLD) h4~VzCR4x\
mergeSort(data, temp, l, mid); Vg"vC
else +KP&D.wIo
insertSort(data, l, mid - l + 1); Y)AHM0;g
if ((r - mid) > THRESHOLD) HJe6h. P
mergeSort(data, temp, mid + 1, r); +\cG{n*
else }ol<DV
insertSort(data, mid + 1, r - mid); BGO pUy
Z =*h9,MY
for (i = l; i <= mid; i++) { =cx_3gCr{
temp = data; lO1]P&@
} -x>2Wb~%
for (j = 1; j <= r - mid; j++) { lt0byn$vz
temp[r - j + 1] = data[j + mid]; LdX'V]ITh
} d}^hZ8k|
int a = temp[l]; nc#} \
int b = temp[r]; M&rbXi.
for (i = l, j = r, k = l; k <= r; k++) { lBG"COu
if (a < b) { CG!9{&F
data[k] = temp[i++]; gJOD+~
a = temp; 9*[!ux7h
} else { |7miT!y8
data[k] = temp[j--]; 4tp}
b = temp[j]; )u=a+T
} /jn0Xh
} [Lid%2O3ZR
} 9_%??@^>
?r.U5}PBI
/** ]_! .xx>
* @param data wJWofFz
* @param l Xc G
* @param i M{XBmDfN
*/ Qf@ha
private void insertSort(int[] data, int start, int len) { gt(!I^LHYc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )JR&
} =$< .:b
} CYhSCT!-?
} 6{[uCxxl
} 8+&Da
Mg\8m-L^
堆排序： /t _QA
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package org.rut.util.algorithm.support; SJ&+"S&
f"G-',O<
import org.rut.util.algorithm.SortUtil; *7yrm&@nG
)H*BTfmt
/** G;^,T/q47
* @author treeroot N9PEn[t@
* @since 2006-2-2 34aSRFsk*
* @version 1.0 VVi3g
*/ Q.l3F3;
public class HeapSort implements SortUtil.Sort{ \{}5VVw-S?
"'I|#dKoG
/* (non-Javadoc) "1-z'TV=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O _^Y*!
*/ _qSVYVJ u
public void sort(int[] data) { &v/R-pz
MaxHeap h=new MaxHeap(); 7vB6IF
h.init(data); a)M3t
for(int i=0;i h.remove(); >d^DN;p
System.arraycopy(h.queue,1,data,0,data.length); 0@}:`OynX
} J L2g!n= K
'6f)^DYA'?
private static class MaxHeap{ O?qM=W
n6#z{,W<3
void init(int[] data){ f(*iagEy
this.queue=new int[data.length+1]; 1<pb=H
for(int i=0;i queue[++size]=data; X;yThb`iI
fixUp(size); L=kETJ:g
} g,\O}jT\'
} '17V7A/t
r<_qU3Eaj
private int size=0; .;%`I
7Q #A
private int[] queue; ?2Sm f
W$Z8AZ{E
public int get() { :2AlvjvjZ
return queue[1]; XOPiwrg%p
} OT}P0 ~4s
U/>l>J5
public void remove() { r.v.y[u
SortUtil.swap(queue,1,size--); ffem7eQ
fixDown(1); opon"{
} F)=*Ga
file://fixdown dp*E#XCr1
private void fixDown(int k) { F|?}r3{aJ
int j; (T=u_oe
while ((j = k << 1) <= size) { FdS'0#$
if (j < size %26amp;%26amp; queue[j] j++; [lE^0_+
if (queue[k]>queue[j]) file://不用交换 O5A]{W
break; i6xzHfaYG
SortUtil.swap(queue,j,k); #[sJKW
k = j; TZa LB}4
} \r-v]]_<d
} ]N6UY
private void fixUp(int k) { 6Q}>=R^h
while (k > 1) { *!`bC@E
int j = k >> 1; @4P_Yfn
if (queue[j]>queue[k]) OwLJS5r@<-
break; (O'O#AD
SortUtil.swap(queue,j,k); Kj#h9e
k = j; r ['zp=9
} CiIIlE4
} FES0lw{G#
kjOI7`DU
} 3SI%>CO}
z=qxZuFkDs
} #kAk d-QY6
FF#?x@N:
SortUtil： {1'M76T
"cDc~~3/@
package org.rut.util.algorithm; |i- S}M
"_ON0._(/
import org.rut.util.algorithm.support.BubbleSort; 9oVprd>%@
import org.rut.util.algorithm.support.HeapSort; eyG[1EEU
import org.rut.util.algorithm.support.ImprovedMergeSort; 7h\U}!
import org.rut.util.algorithm.support.ImprovedQuickSort; 0B(Y{*QB
import org.rut.util.algorithm.support.InsertSort; [V41 Gk
import org.rut.util.algorithm.support.MergeSort; vJuL+'[i
import org.rut.util.algorithm.support.QuickSort; (_eM:H=e>
import org.rut.util.algorithm.support.SelectionSort; mxTuwx
import org.rut.util.algorithm.support.ShellSort; TR!7@Mu3
Enqs|fkbN
/** ^PowL:
* @author treeroot 36yIfC,
* @since 2006-2-2 M3H^s_
* @version 1.0 !GtCOr\'
*/ 13/U4-%b2
public class SortUtil { ^\3z$ntF
public final static int INSERT = 1; 'PdUSv|lH
public final static int BUBBLE = 2; Lg+cHaA
public final static int SELECTION = 3; x.>[A^
public final static int SHELL = 4; N0UZ%,h\
public final static int QUICK = 5; $GIup5
public final static int IMPROVED_QUICK = 6; d&%}u1 .
public final static int MERGE = 7; 42wZy|oqp
public final static int IMPROVED_MERGE = 8; 3s Mmg`
public final static int HEAP = 9; n;~6'fxe
~{[,0,lWU
public static void sort(int[] data) { :bz;_DZP
sort(data, IMPROVED_QUICK); BzI(
} iU4Z9z!
private static String[] name={ It5n;,n
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BXLw
}; ;ZR^9%+y9
7OLchf
private static Sort[] impl=new Sort[]{ GD#W=O
new InsertSort(), tDNo; f
new BubbleSort(), P'oY+#
new SelectionSort(), /4,U@s)"/
new ShellSort(), ou[Wz{
new QuickSort(), ^-7-jZ@jz
new ImprovedQuickSort(), z2OXCZ*/
new MergeSort(), &_$xMM,X
new ImprovedMergeSort(), u1/q8'RW
new HeapSort() sW!MVv
}; wy?Hp*E
Y,d|b V*FH
public static String toString(int algorithm){ ~JohcU}d
return name[algorithm-1]; KL8WT6!RZ
} ^tl&FWF
<u2iXH5w
public static void sort(int[] data, int algorithm) { HG[gJ7
impl[algorithm-1].sort(data); +fG~m:E
} [3io6XG x@
r8[Ywn<u
public static interface Sort { Ct}rj-L<i
public void sort(int[] data); i-Ri;E
} 8Tm/gzx
|p":s3K"Hy
public static void swap(int[] data, int i, int j) { ^j]"5@f
int temp = data; |~YhN'OJ
data = data[j]; hV"2L4/E
data[j] = temp; zK&J2P`
} L&qY709
} t:qPW<wc