[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; iW]j9}t
} )0.kv2o.
int i1=l; KVoS C@w
int i2=mid+1; acajHs
for(int cur=l;cur<=r;cur++){ P%V'4pc
if(i1==mid+1) 0rQMLx
data[cur]=temp[i2++]; {k>&?Vd!
else if(i2>r) )#0O>F~
data[cur]=temp[i1++]; q~b&
else if(temp[i1] data[cur]=temp[i1++]; ^b4 9
else e8>})
data[cur]=temp[i2++]; A2I9R;}
} lLX4Gq1
} =57>!)
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} n$MO4s8)
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改进后的归并排序: dc+>m,3$
rT=rrvV3g
package org.rut.util.algorithm.support; 0#7>o^2
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import org.rut.util.algorithm.SortUtil; [SjqOTon{
Q,,e+exbb5
/** 6+#Ydii9E
* @author treeroot 1jmjg~W
* @since 2006-2-2 wjU9ZGM
* @version 1.0 .Yamc#A-
*/ \#8D>i?m
public class ImprovedMergeSort implements SortUtil.Sort { JinUV6cr
e[{0)y>=
private static final int THRESHOLD = 10; n2"a{Ofhlf
NJ%P/\ C
/* poc`q5i+
* (non-Javadoc) -mbt4w
* w1FcB$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +r�
*/ u4*BX&
public void sort(int[] data) { U45e2~1!O
int[] temp=new int[data.length]; $!-yr7
mergeSort(data,temp,0,data.length-1); k90YV(
} W-$Z(Z XL
E'f{i:O"~
private void mergeSort(int[] data, int[] temp, int l, int r) { juP7P[d$qW
int i, j, k; \,'m</o~,
int mid = (l + r) / 2; :p1u(hflS
if (l == r) 7zl5yKN
return; ] 7[ 3>IN
if ((mid - l) >= THRESHOLD) v8wq,CYV
mergeSort(data, temp, l, mid); vRYQ{:
else mtpeRVcF
insertSort(data, l, mid - l + 1); T )&A2q
if ((r - mid) > THRESHOLD) [@_Jj3`4
mergeSort(data, temp, mid + 1, r); Ucb F|vkI
else +X\FBvP&
insertSort(data, mid + 1, r - mid); c^5~QGuQ
vJLK,[
for (i = l; i <= mid; i++) { s2a{>II6
temp = data; {Ea b j
} xf'V{9*
for (j = 1; j <= r - mid; j++) { "-E\[@/
temp[r - j + 1] = data[j + mid]; &.F4b~A7
} SjK
int a = temp[l]; ,Y@Gyx!4
int b = temp[r]; 4XL^D~V
for (i = l, j = r, k = l; k <= r; k++) { oe ~'o'
if (a < b) { :ffY6L+
data[k] = temp[i++]; HRpte=`q
a = temp; f'F?MINJP
} else { Q*GN`07@?d
data[k] = temp[j--]; mwO6g~@`
b = temp[j]; ^23~ZHu
} 1wii8B6
} 2zX]\s?3
} B4ZBq%Z_
ynp8rf
/** YByLoM*
* @param data Q1lyj7c#x
* @param l V~qNyOtA]
* @param i XjBW9a
*/ 05|=`eJ
private void insertSort(int[] data, int start, int len) { )|ccX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MnmVl"(/
} hy9\57_#
} 1l9G[o *
} [=C6U_vU
} v<k?Vu
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堆排序： m1b?J3
I2XU(pYU
package org.rut.util.algorithm.support; 6]i-E>p3R
S*pGMuui
import org.rut.util.algorithm.SortUtil; Xa[.3=bV?
y4yhF8E>;U
/** ^"E^zHM(
* @author treeroot L]7=?vN=8
* @since 2006-2-2 />C^WQI^
* @version 1.0 +8T?{K
*/ =&6eM2>P
public class HeapSort implements SortUtil.Sort{ 1pVS&0W
.C%<P"=J4h
/* (non-Javadoc) D#aDv0b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O}gV`q;
*/ ~ZaY!(R<
public void sort(int[] data) { eNh39er
MaxHeap h=new MaxHeap(); EZgwF=lO
h.init(data); \eTwXe]Pv
for(int i=0;i h.remove(); Fk7?xc
System.arraycopy(h.queue,1,data,0,data.length); "> ypIR<
} $L`d&$Vh
'JtBZFq
private static class MaxHeap{ P-[-pi@
OHN_
void init(int[] data){ uuEV_"X
this.queue=new int[data.length+1]; Xc++b|k
for(int i=0;i queue[++size]=data; 2B1q*`6R
fixUp(size); rE7G{WII
} ]Ee?6]bN
} VO5#Qgen
^^u5*n+5
private int size=0; y G~?MEh{
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private int[] queue; ,O5NLg-
E*&vy
public int get() { Ha#=(9.
return queue[1]; d2FswF$C
} -12UN(&&Z
,i NXK
public void remove() { @)F)S7
SortUtil.swap(queue,1,size--); eSn+B;
fixDown(1); 1y&\5kB
} @3i\%R)n;
file://fixdown bG"~"ipn%
private void fixDown(int k) { +.8 \p5
int j; rw[ph[\X
while ((j = k << 1) <= size) { d7^}tM
if (j < size %26amp;%26amp; queue[j] j++; yZ7&b&2nLn
if (queue[k]>queue[j]) file://不用交换 (y'hyJo
break; zC:ASt
SortUtil.swap(queue,j,k); b)#hSjWO#
k = j; -:^U_FL8un
} n)/z0n!\
} BU)U/A8iS
private void fixUp(int k) { wVXS%4|v
while (k > 1) { &<g|gsG`
int j = k >> 1; f^ZRT@`O
if (queue[j]>queue[k]) Rr$-tYy6
break; Oxnp0 s
SortUtil.swap(queue,j,k); FgnTGY}
k = j; 3d8L6GJ
} [Y/} ^
} OF>mF~
2>9C-VL2
} hF?1y`20
1#g2A0U,
} J(TkXNm
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SortUtil： OdbEq?3S/?
~\SGb_2
package org.rut.util.algorithm; OnziG+ak
@n/\L<]t
import org.rut.util.algorithm.support.BubbleSort; iozt&~o
import org.rut.util.algorithm.support.HeapSort; X #dmo/L8
import org.rut.util.algorithm.support.ImprovedMergeSort; phkwN}6
import org.rut.util.algorithm.support.ImprovedQuickSort; ^#-l q)
import org.rut.util.algorithm.support.InsertSort; A|[?#S((]
import org.rut.util.algorithm.support.MergeSort; @u+]aI!`-
import org.rut.util.algorithm.support.QuickSort; eeg)N1\
import org.rut.util.algorithm.support.SelectionSort; fb7;|LF
import org.rut.util.algorithm.support.ShellSort; )* :gqN
]#<4vl\
/** ]EbM9Fo-U
* @author treeroot eIF5ZPSZi
* @since 2006-2-2 Jrf=@m\dk
* @version 1.0 b6M[q_
*/ tFn)aa~L
public class SortUtil { +480 l}
public final static int INSERT = 1; ,pfG
public final static int BUBBLE = 2; R{4^t97wH{
public final static int SELECTION = 3; 9=M$AB
public final static int SHELL = 4; ;+_:,_
public final static int QUICK = 5; Q}JOU
public final static int IMPROVED_QUICK = 6; BVQqY$>
public final static int MERGE = 7; m 0C@G5
public final static int IMPROVED_MERGE = 8; X05/uX{
public final static int HEAP = 9; h&iC;yj=
P5V}#;v
public static void sort(int[] data) { \7eUw,~Q>
sort(data, IMPROVED_QUICK); ,t744k')
} UgRiIQMq.
private static String[] name={ ztY}5A2`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VCfl`Aq'l
}; &B;~
p>N(Typ0b
private static Sort[] impl=new Sort[]{ *R,5h2;
new InsertSort(), `hm-.@f,9
new BubbleSort(), //MUeTxR
new SelectionSort(), dFc':|
new ShellSort(), h4}84}5d
new QuickSort(), X`/k)N>l
new ImprovedQuickSort(), 3*bU6$|5FP
new MergeSort(), 9RL`<,Q
new ImprovedMergeSort(), aK~8B_5k8
new HeapSort() 8`{:MkXP
}; aKDKmHd
;1=1:S8
public static String toString(int algorithm){ xa*hi87L*
return name[algorithm-1]; r<EY]f^`u
} R^fPIv`q
uMv,zO5
public static void sort(int[] data, int algorithm) { bWS&Yk(
impl[algorithm-1].sort(data); J{<X7uB
} Hio0HL-
S+6.ZZ9c
public static interface Sort { ,THw"bm
public void sort(int[] data); {uFO/
} Qljpx?E
V &T~zh1
public static void swap(int[] data, int i, int j) { MJ)RvNF
int temp = data; 8W7J3{d
data = data[j]; I][*j
data[j] = temp; Lb-OsKU
} ]5cT cX;Z#
} G4;Oi=