[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; T42g4j/l~
} $ZU(bEUOG
int i1=l; hvyN8We
int i2=mid+1; a)1,/:7'
for(int cur=l;cur<=r;cur++){ `9+EhP$RS
if(i1==mid+1) IO#W#wW$M
data[cur]=temp[i2++]; ^ztf:'l@C
else if(i2>r) %&XX*& q
data[cur]=temp[i1++]; I/aAx.q
else if(temp[i1] data[cur]=temp[i1++]; [f0HUbPX
else |DW'RopM
data[cur]=temp[i2++]; Bkc-iC}F
} deoM~r9s
} pJz8e&wyLM
2YKM9Ks
} IdxToMr
b-?o?}*
改进后的归并排序: ".%LBs~$
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package org.rut.util.algorithm.support; tZ^;{sM
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import org.rut.util.algorithm.SortUtil; Y14R"*t~
h'~-K`
/** <o+ 7U
* @author treeroot +ca296^
* @since 2006-2-2 +{%(_<
* @version 1.0 p*,P%tX
*/ DA$Q-
public class ImprovedMergeSort implements SortUtil.Sort { e@=[+iJc
k8e"5 he
private static final int THRESHOLD = 10; 'w[d^L
l;*lPRoW,
/* w3qf7{b
* (non-Javadoc) NP`s[
* &&1Y"dFs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m5w9l"U]H
*/ 0 jP00
public void sort(int[] data) { }Tr83B|
int[] temp=new int[data.length]; z<6P3x|
mergeSort(data,temp,0,data.length-1); BhW]Oq&
} f WjS)
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private void mergeSort(int[] data, int[] temp, int l, int r) { -ouJf}#R
int i, j, k; &n]Z1e}5
int mid = (l + r) / 2; HwW[M[qA
if (l == r) G^rh*cb K
return; mnQjX ?
if ((mid - l) >= THRESHOLD) C}=_8N
mergeSort(data, temp, l, mid); $^=jPk]+
else @@/'b'
insertSort(data, l, mid - l + 1); $qtU
if ((r - mid) > THRESHOLD) ?PE1aB+{:
mergeSort(data, temp, mid + 1, r); CESe}^)n
else t7oz9fSz=?
insertSort(data, mid + 1, r - mid); OpbT63@L
k[ffs}
for (i = l; i <= mid; i++) { av; (b3Lq
temp = data; '5xuT _
} *T>#zR{
for (j = 1; j <= r - mid; j++) { ADyNNMcx
temp[r - j + 1] = data[j + mid]; 9(^X2L&Z
} =o{: -EKQF
int a = temp[l]; fb0T/JTw
int b = temp[r]; +wz`_i)!
for (i = l, j = r, k = l; k <= r; k++) { +<!)k?
if (a < b) { krr-ZiK
data[k] = temp[i++]; SJ@8[n.x
a = temp; LTYuxZ
} else { F`;TU"pDf
data[k] = temp[j--]; #>E3'5b
b = temp[j]; f=_Bx2ub
} 2yJ7]+Jd7Y
} 3)C6OF>7
} vbWJhjK0h
ZM-/n>
/** Gh$y#0qr
* @param data 6"7:44O;G
* @param l r?"}@MRW
* @param i c?p0#3%L#
*/ EbBv}9g
private void insertSort(int[] data, int start, int len) { x;ERRK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }"&n[/8~
} K'iS#i7
} T.R>xd`9 "
} j#LV7@H.e?
} vy{rwZ$
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堆排序： 6:|!1Pg5
r6oX6.c
package org.rut.util.algorithm.support; xP{HjONu
1kvPiV=X>
import org.rut.util.algorithm.SortUtil; b[{m>Fa+o#
j{Yt70Wv
/** fH#F"^A
* @author treeroot ny!lja5[
* @since 2006-2-2 dDv{9D,
* @version 1.0 r%g <hT 8
*/ =1{H Sf
public class HeapSort implements SortUtil.Sort{ eHVdZ'%x
Xmf
/* (non-Javadoc) @7Q*h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VL_)]LR*)
*/ Dh\S`nfFq
public void sort(int[] data) { mC*W2#1pF
MaxHeap h=new MaxHeap(); di]$dl|Wi
h.init(data); SE-!|WR
for(int i=0;i h.remove(); 5}-)vsa`
System.arraycopy(h.queue,1,data,0,data.length); &57qjA,8<
} ^G|w8t+^
uD.
private static class MaxHeap{ 5z9r S<
92P,:2`a
void init(int[] data){ th.M.jas
this.queue=new int[data.length+1]; R7E]*:0}
for(int i=0;i queue[++size]=data; f0-RhR
fixUp(size); paq8L{R
} uuI3NAi~
} 7j@^+rkr3f
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private int size=0; $x;tSJ)m~
httls>:xB|
private int[] queue; IT8B~I\OY
P\D[n-&
public int get() { Q9`s_4
return queue[1]; /-DKV~
} 3M}AxEu
8pXfT%]
public void remove() { 1zdYBb6;j
SortUtil.swap(queue,1,size--); ~GNyE*t/Y
fixDown(1); f?2zLE>u
} X tJswxw`K
file://fixdown ot-(4Y
private void fixDown(int k) { <$"7~i/X
int j; @)
while ((j = k << 1) <= size) { Sv.KI{;v$
if (j < size %26amp;%26amp; queue[j] j++; M#=Y~PU
if (queue[k]>queue[j]) file://不用交换 6o$Z0mG
break; }j&O/Up
SortUtil.swap(queue,j,k); n(Qj||:
k = j; g;$E1U=R-E
} f&K}IM8& #
} 7^c2e*S
private void fixUp(int k) { eT;AAGql
while (k > 1) { RwUW;hU
int j = k >> 1; D[V`^CTu
if (queue[j]>queue[k]) 0 9tikj1
break; b21}49bHN
SortUtil.swap(queue,j,k); QxKAXq@)i
k = j; Q{O/xLf
} >Ja0hS{*
} C=8H)Ef,l
QT_Srw@
} Mk<m6E$L
FSv1X
} ,KT<4
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SortUtil： AD(xaQ&T
4>l0V<
package org.rut.util.algorithm; bS,etd
;.\g-`jb
import org.rut.util.algorithm.support.BubbleSort; sb'lZFSP~s
import org.rut.util.algorithm.support.HeapSort; Yi[4DfA
import org.rut.util.algorithm.support.ImprovedMergeSort; X+@s]
import org.rut.util.algorithm.support.ImprovedQuickSort; ,dOMW+{
import org.rut.util.algorithm.support.InsertSort; T{ok +$w2
import org.rut.util.algorithm.support.MergeSort; 4yhcK&
import org.rut.util.algorithm.support.QuickSort; :sFo
import org.rut.util.algorithm.support.SelectionSort; 0"4J"q]&
import org.rut.util.algorithm.support.ShellSort; D$ej+s7
_<XgC\4O|
/** B+|IZoR
* @author treeroot ^+EMZFjg(
* @since 2006-2-2 D_Guc8*
* @version 1.0 6I"C~&dt
*/ f:S}h-AL&
public class SortUtil { WBa /IM
public final static int INSERT = 1; R<>tDwsZGa
public final static int BUBBLE = 2; J, r Xx:
public final static int SELECTION = 3; rJX\6{V!_
public final static int SHELL = 4; <;aJ#qT
public final static int QUICK = 5; 9]Lo
public final static int IMPROVED_QUICK = 6; 6vF/e#},
public final static int MERGE = 7; kwOeHdV^
public final static int IMPROVED_MERGE = 8; eJW[ ]!
public final static int HEAP = 9; ,b4g.CV
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public static void sort(int[] data) { sLZ>v
sort(data, IMPROVED_QUICK); q P'[&h5Y
} 2Sjt=LOc="
private static String[] name={ ZzT&$J7]`{
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ldYeX+J _
}; }DbE4"^K7
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private static Sort[] impl=new Sort[]{ 6W$rY] h!
new InsertSort(), K0v.3
new BubbleSort(), (U_wp's
new SelectionSort(), Hxn<(gd G
new ShellSort(), W~<m[#:6C
new QuickSort(), lJUy;yp_+
new ImprovedQuickSort(), W-ez[raY
new MergeSort(), P,U$ %C!
new ImprovedMergeSort(), HgaZbb>'
new HeapSort() }I]W'<jY
}; 8?kP*tmcZ
Vha'e3o!
public static String toString(int algorithm){ 8<{;=m8cQ
return name[algorithm-1]; Y+@g~TE
} |_, /u_
\q,s?`+B
public static void sort(int[] data, int algorithm) { >J@egIKzP
impl[algorithm-1].sort(data); c_Tzyh7l4
} S+iP^*L,c
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public static interface Sort { iE=P'"I
public void sort(int[] data); |by@ :@*y
} ^aHh{BQ%
uOre,AQR
public static void swap(int[] data, int i, int j) { /BT1oWi1y
int temp = data; -;U3w.-
data = data[j]; k2.G%]j
data[j] = temp; 2f^-~dz
} P5Dk63z]
} y?Onb3%