[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; mPmg6Qj(W
} Dh4EP/=z
int i1=l; BDO]-y
int i2=mid+1; Qw,{"J
for(int cur=l;cur<=r;cur++){ iB1+4wa
if(i1==mid+1) \i2S'AblYq
data[cur]=temp[i2++]; ~+HZQv3Y
else if(i2>r) {SQ#n@Q&$
data[cur]=temp[i1++]; 8F;r$i2
else if(temp[i1] data[cur]=temp[i1++]; 5, j&-{0W
else /}ADV2sF
data[cur]=temp[i2++]; C<T)'^7z
} 3jJd)C R
} RyN}Gz/YN
d,"6s=4(q
} d4r@Gx%BE
/Tc I
改进后的归并排序: x+%(z8wD
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package org.rut.util.algorithm.support; ,lUroO^^
*oW^P~m/
import org.rut.util.algorithm.SortUtil; hE9UWa.Q>
#\{j/{VZ
/** dB=aq34l
* @author treeroot n{@^ne4m
* @since 2006-2-2 E[nJ'h<h
* @version 1.0 kgQyG[u
*/ Xh[02iL-
public class ImprovedMergeSort implements SortUtil.Sort { (H*EZ
Or2J
private static final int THRESHOLD = 10; "L)=Y7Dx
.Jvy0B} B
/* ,5 A&
* (non-Javadoc) ~R$Ko(N
* 4b}94e@(N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zg[.Pws:E
*/ +Y9n@`
public void sort(int[] data) { )d^b\On
int[] temp=new int[data.length]; =a]B#uUn
mergeSort(data,temp,0,data.length-1); 1k:s~m?!
} ]CnqPLqL
-IP3I
private void mergeSort(int[] data, int[] temp, int l, int r) { X^%E"{!nU
int i, j, k; p&O-]o8
int mid = (l + r) / 2; JKMcdD?'
if (l == r) /yd<+on^
return; q]}1/JZS
if ((mid - l) >= THRESHOLD) B|zVq=l~
mergeSort(data, temp, l, mid); Lu6?$N57rC
else -gzY~a
insertSort(data, l, mid - l + 1); c9<&+
if ((r - mid) > THRESHOLD) %(v<aEQtt
mergeSort(data, temp, mid + 1, r); ]ICBNJ
else n#fc=L1U
insertSort(data, mid + 1, r - mid); 0D=7Mef
t%'0uB#v1
for (i = l; i <= mid; i++) { `BGU
temp = data; bpv?$j-j
} ,iYKtS3
for (j = 1; j <= r - mid; j++) { OpT0V]k^"9
temp[r - j + 1] = data[j + mid]; =JK# "'
} =#Qm D=
int a = temp[l]; ;xl_9Ht/
int b = temp[r]; ud@7%%
for (i = l, j = r, k = l; k <= r; k++) { 45DR%cz
if (a < b) { {W5D)
data[k] = temp[i++]; 7K\H_YY8#
a = temp; %J 'RO
} else { S$egsK"~
data[k] = temp[j--]; `J}-U\4F{
b = temp[j]; d J;y>_
} I$#)k^Q
} /[|ODfY
} ~l@-gAyw
qt !T%K
/** S}T*gUO
* @param data x.:k0;%Q
* @param l 4\?GA`@
* @param i ?xgrr7
*/ cYafQyU
private void insertSort(int[] data, int start, int len) { )b_ GKA `
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); u3XQ<N{Gj
} ^^m3 11=
} J91O$szA
} a!?&8$^<
} ;&9A Yh.
@N'0:0Nb_
堆排序： (H*d">`mz
w&E*{{otJ
package org.rut.util.algorithm.support; B&Igm<72x
B,]:<1l~
import org.rut.util.algorithm.SortUtil; O(Tdn;1
XJ.ERLR.
/** [Tq\K ^!^
* @author treeroot FlPPz
* @since 2006-2-2 D]h~\
* @version 1.0 R Wd#)3
*/ 1 iWe&I:
public class HeapSort implements SortUtil.Sort{ .eSMI!Y=
*k7vm%#ns
/* (non-Javadoc) TP5?%SlJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mAFVjSa2
*/ !83N. gN
public void sort(int[] data) { b3,&RUF
MaxHeap h=new MaxHeap(); r,`59
h.init(data); >cEB,@~
for(int i=0;i h.remove(); iQI$Y]Y7
System.arraycopy(h.queue,1,data,0,data.length); 3V"y|q
} J3$Ce%<
i7m=V T
private static class MaxHeap{ fy(i<L Z
hSvA dT]m
void init(int[] data){ _cW(R,i
this.queue=new int[data.length+1]; qC%[J:RwF
for(int i=0;i queue[++size]=data; t[.wx.y&0
fixUp(size); gmY*}d` 'f
} N`DLIv8i;
} (;11xu
#0+`dI_5/
private int size=0; <Rl:=(]i~
P0En&g+~
private int[] queue; 3]X9 z
G|p3NhLgO=
public int get() { x 7;Zwd
return queue[1]; `y26OYo
} ~[CtsCiQ
BE;J/
public void remove() { iE|qU_2Y
SortUtil.swap(queue,1,size--); ]vPa A
fixDown(1); ww]^H$In
} WG{mg/\2(C
file://fixdown f4s^$Q{Q
private void fixDown(int k) { fCMH<}w
int j; g*NKY`,
while ((j = k << 1) <= size) { A-GRuC
if (j < size %26amp;%26amp; queue[j] j++; -,;Iob56!
if (queue[k]>queue[j]) file://不用交换 9\/T #EP
break; Qr/8kWa0C
SortUtil.swap(queue,j,k); EzDj,!!<w
k = j; 6T}bD[h4?
} nC3U%*l
} [Z5Lgg&
private void fixUp(int k) { }@*Me+
while (k > 1) { $>3/6(bW
int j = k >> 1; 5ml^3,x
if (queue[j]>queue[k]) QL>G-Rp
break; \;?=h
SortUtil.swap(queue,j,k); ::y+|V/
k = j; b"ypS7 _
} _l&`* 2d
} pr|P#mc"J
)V^J^1
} !9!kb
IX7|_ci
} '8NKrI
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SortUtil： v5|X=B>&>
P&/PCSf
package org.rut.util.algorithm; .EC/[fM
\8uPHf_
import org.rut.util.algorithm.support.BubbleSort; Lc|5&<8ZG1
import org.rut.util.algorithm.support.HeapSort; 8t$a8 PE
import org.rut.util.algorithm.support.ImprovedMergeSort; GfAt-huL(
import org.rut.util.algorithm.support.ImprovedQuickSort; ^|6%~jkD5
import org.rut.util.algorithm.support.InsertSort; +w-UK[p
import org.rut.util.algorithm.support.MergeSort; 4]N`pD5
import org.rut.util.algorithm.support.QuickSort; ZhKYoPIq
import org.rut.util.algorithm.support.SelectionSort; P!C!E/Jf5
import org.rut.util.algorithm.support.ShellSort; *f~X wy"
q|,I\H5}
/** %d+:0.+`n
* @author treeroot \A\a=A[
* @since 2006-2-2 H1uNlPT
* @version 1.0 A/W-'%+`
*/ @WX]K0$;
public class SortUtil { ;T}#-`O_Im
public final static int INSERT = 1; A2z%zMlZc
public final static int BUBBLE = 2; ?aInn:FE
public final static int SELECTION = 3; Urhh)i
public final static int SHELL = 4; G3P3
public final static int QUICK = 5; :K&
public final static int IMPROVED_QUICK = 6; [R j=k)aBm
public final static int MERGE = 7; /vFw5KUu
public final static int IMPROVED_MERGE = 8; uXuMt a*Y
public final static int HEAP = 9; Hw34wQX
dOq*W<%
public static void sort(int[] data) { CTt3W>'=+
sort(data, IMPROVED_QUICK); ZD1UMB0$4
} YJ]]6 K+
private static String[] name={ "sz)~Q'W5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h"KN)xi$
}; !`vm7FN"u
]*pALT6
private static Sort[] impl=new Sort[]{ 0fnd9`N!0
new InsertSort(), "A^9WhUpJ
new BubbleSort(), +nRO<
new SelectionSort(), FqiCzP4
new ShellSort(), $%VFk53I
new QuickSort(), h2+vl@X
new ImprovedQuickSort(), OWCd$c_(
new MergeSort(), E9{Gaa/{
new ImprovedMergeSort(), \$s<G|<P
new HeapSort() *&>1A A
}; 0@1AH<
eJ>(SkR:[
public static String toString(int algorithm){ ghJ81
return name[algorithm-1]; >t u3m2
} RX:\@c&
Ul OoMGg
public static void sort(int[] data, int algorithm) { 7ZS5u+o
impl[algorithm-1].sort(data); N\DEY]
} =35^k-VS
t#oY|G3O}
public static interface Sort { 3*64)Ol7t]
public void sort(int[] data); V@<tIui$
} A[v]^pv'
ofl3G {u
public static void swap(int[] data, int i, int j) { 3> -/sii
int temp = data; R_.C,mR ?
data = data[j]; L.lmbxn
data[j] = temp; Afo(! v
} 0U ?1Yh7 m
} #\iQ`Q<B