[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; -bs~{
} h\20
int i1=l; M&>Z[o
int i2=mid+1; |~Z+Xla
for(int cur=l;cur<=r;cur++){ i4uUvZf
if(i1==mid+1) IB?5y~+h
data[cur]=temp[i2++]; 9pk<=F
else if(i2>r) SYC_=X
data[cur]=temp[i1++]; +1cK (Si
else if(temp[i1] data[cur]=temp[i1++]; 0&w.QoZY(
else M VsIyP
data[cur]=temp[i2++]; $Itehy
} nNL9B~d
} WJg?R^
QU\|RX
} ,Z52dggD
py,z7_Nuh
改进后的归并排序: 9cj:'KG)!
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package org.rut.util.algorithm.support; p~M^' k=d
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import org.rut.util.algorithm.SortUtil; scA&:y
pET5BMxGG
/** <)"Mi}Q[)p
* @author treeroot PR.?"$!D{
* @since 2006-2-2 %+`$Lb?{
* @version 1.0 XRaq\a`=:
*/ ;up89a-,9
public class ImprovedMergeSort implements SortUtil.Sort { Z,Q)\W<'-
M#2DI?S@
private static final int THRESHOLD = 10; Mb+cXdZb
Blf;_e~=[j
/* ^Dd$8$?[
* (non-Javadoc) mF#{"
* ~xzRx$vU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6{1c S
*/ <G#JPt6
public void sort(int[] data) { eyUo67'7
int[] temp=new int[data.length]; IF@)L>-%
mergeSort(data,temp,0,data.length-1); Rb\\6BU0
} (uRAK
RELLQpz3
private void mergeSort(int[] data, int[] temp, int l, int r) { 0h$23.
int i, j, k; +e4o~p
int mid = (l + r) / 2; S^~GI$
if (l == r) >D*L0snjV
return; +]Ydf^rF
if ((mid - l) >= THRESHOLD) NbfV6$jo
mergeSort(data, temp, l, mid); -4"E]f
else ^TnBtIU-B
insertSort(data, l, mid - l + 1); p"Fj6T2
if ((r - mid) > THRESHOLD) LL.YkYu
mergeSort(data, temp, mid + 1, r); 347p2sK>
else #uFP eu:
insertSort(data, mid + 1, r - mid); rr2|xL?+u
/1g_Uv;
for (i = l; i <= mid; i++) { ,LU/xI0O
temp = data; 4Yx?75/
} CYs:P8^
for (j = 1; j <= r - mid; j++) { a B%DIH,
temp[r - j + 1] = data[j + mid]; rT5dv3^MW!
} >*dqFZF
int a = temp[l]; t|d9EC]c(
int b = temp[r]; ZOfyy E
for (i = l, j = r, k = l; k <= r; k++) { nIKh<ws4z
if (a < b) { ,%yjEO
data[k] = temp[i++]; kW5g]Q
a = temp; T/uj5pMG
} else { (|"KsGl
data[k] = temp[j--]; (B]rINY|
b = temp[j]; IIs'm!"Y>
} 1Y\g{A"
} 0Ocy$
} ErHbc2
U c$RYPq
/** K`768%q
* @param data 9UZKL@KC
* @param l jL>IX`,+6
* @param i 8(7DW |\
*/ +P81&CaY
private void insertSort(int[] data, int start, int len) { Hh4$Qr;R
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BUuNI_?M#5
} iLNKC'
} y2yW91B,
} tJ i#bg%
} hK&jo(V
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堆排序： C/\)-^
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package org.rut.util.algorithm.support; -:dUD1
^[uA^
import org.rut.util.algorithm.SortUtil; #jv~FR`4v^
w?Cqe N
/** E~3wdOZv1
* @author treeroot I!|_C~I`2
* @since 2006-2-2 ?ep93:j
* @version 1.0 >PGW>W$
*/ ZM`6zS!
public class HeapSort implements SortUtil.Sort{ w =^QIr%
Ao69Qn
/* (non-Javadoc) {+F/lN@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %!mJnc%
*/ ]ECzb/
public void sort(int[] data) { @~qlSU&
MaxHeap h=new MaxHeap(); n&jfJgD&g
h.init(data); *?VbN}g2
for(int i=0;i h.remove(); DKx8<yEky
System.arraycopy(h.queue,1,data,0,data.length); L Me{5H
} =rMT1
nm_]2z O
private static class MaxHeap{ $0~H~-
s=h
void init(int[] data){ '%vb&a!.6
this.queue=new int[data.length+1]; 5IE2&V
for(int i=0;i queue[++size]=data; bx_`S#*N
fixUp(size); NiQ`,Q$B
} g[!t@K
} I6,'o)l{_
l\I#^N
private int size=0; `lX |yy"
/GD4GWv :
private int[] queue; yZj:Kp+7
=* oFs|v
public int get() { zxTcjC)y
return queue[1]; yl0&|Ub
} y-w=4_W
e C?adCb
public void remove() { AKk6kI8F
SortUtil.swap(queue,1,size--); ~ODm?k
fixDown(1); g"Mqh!{ FI
} WwG78b-OA
file://fixdown Ri=>evx
private void fixDown(int k) { q\cH+n)C
int j; s<Px au+A
while ((j = k << 1) <= size) { =iO K($
if (j < size %26amp;%26amp; queue[j] j++; '/trM%<
if (queue[k]>queue[j]) file://不用交换 aVNBF`
break; DK;p6_tT
SortUtil.swap(queue,j,k); D~E1hr&Vd>
k = j; a|Io)Qhr
} eKPxSN Z
} z-$bce9*
private void fixUp(int k) { XkLl(uyh
while (k > 1) { kscZ zXv
int j = k >> 1; G0Q} 1
if (queue[j]>queue[k]) aw&:$twbM
break; SAMP,un7
SortUtil.swap(queue,j,k); ;jS2bc:8a
k = j; FR&4i" +
} YNyaz\L
} MB06=N
?f<JwF<
} |\;oFuCv##
+[Cdd{2
} v]SHude{
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SortUtil： $<cio X
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package org.rut.util.algorithm; <ZGEmQ
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import org.rut.util.algorithm.support.BubbleSort; v6(Yz[
import org.rut.util.algorithm.support.HeapSort; 5G"LuA
import org.rut.util.algorithm.support.ImprovedMergeSort; +aR.t@D+"Y
import org.rut.util.algorithm.support.ImprovedQuickSort; D;VQoO
import org.rut.util.algorithm.support.InsertSort; &/R`\(hEA
import org.rut.util.algorithm.support.MergeSort; -e0C Bp
import org.rut.util.algorithm.support.QuickSort; &D0suK#
import org.rut.util.algorithm.support.SelectionSort; ?0 93'lA
import org.rut.util.algorithm.support.ShellSort; c@;$6WSG^
ilJeI@
/** = }0M^F
* @author treeroot {5w'.Z]0v
* @since 2006-2-2 (WZKqt)S"o
* @version 1.0 0goKiPx
*/ "h?;)Ye
public class SortUtil { {C3AxK0
public final static int INSERT = 1; q/w<>u
public final static int BUBBLE = 2; Ja<pvb
public final static int SELECTION = 3; tl9=u-D13@
public final static int SHELL = 4; GG%X1c8K
public final static int QUICK = 5; {uH 4j4)2
public final static int IMPROVED_QUICK = 6; `2`Nu:r^
public final static int MERGE = 7; m}/LMY
public final static int IMPROVED_MERGE = 8; B w?Kb@
public final static int HEAP = 9; x}o]R
l}odW
public static void sort(int[] data) { t9T3e
sort(data, IMPROVED_QUICK); jm9J-%?
} ]AkHNgW
private static String[] name={ ]4~- z3=y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" W _j`'WN/
}; Z)}q=NjA
7oaa)
private static Sort[] impl=new Sort[]{ {];4
new InsertSort(), oz $T.
new BubbleSort(), juOOD
new SelectionSort(), 0s)B~
new ShellSort(), i\hH .7G1
new QuickSort(), f[v~U<\R
new ImprovedQuickSort(), ~3-2Iu^F
new MergeSort(), 6!P];3&o\A
new ImprovedMergeSort(), ^@f%A<
new HeapSort() 0w^\sf%s
}; ZK,}3b{
M7z>ugk"
public static String toString(int algorithm){ CY2DxP%
return name[algorithm-1]; eBiP\
} l*]9
/LMb~Hy,
public static void sort(int[] data, int algorithm) { k<W n
impl[algorithm-1].sort(data); $mFsf)1]]?
} <K4`GT"n
rx`G*k{X
public static interface Sort { L-ans2?
public void sort(int[] data); ]}z;!D>
} :(tSL{FO
q)JG_Y.p
public static void swap(int[] data, int i, int j) { K^z-G=|N
int temp = data; qT]Bl+h2
data = data[j]; iw1((&^)"
data[j] = temp; Yc;cf%c1
} T{=.mW^ x
} tMGkm8y-A