[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; /7kC<
} p'%s=TGwv
int i1=l; UfGkTwoo=
int i2=mid+1; 29KiuP
for(int cur=l;cur<=r;cur++){ XwmL.Gg:]7
if(i1==mid+1) +whDU2 "
data[cur]=temp[i2++]; q1,~
else if(i2>r) fu5=k:/c
data[cur]=temp[i1++]; A&VG~r$
else if(temp[i1] data[cur]=temp[i1++]; KPF1cJ2N
else k:;r2f
data[cur]=temp[i2++]; \dVOwr
} v+XJ*N[W
} (HVGlw'`
vzM^$V
} [WmM6UEVS
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改进后的归并排序: h0$iOE
icgfB-1|i
package org.rut.util.algorithm.support; l**X^+=$
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import org.rut.util.algorithm.SortUtil; UNYqft4
]G\}k
/** @]j1:PN-
* @author treeroot A"]YM'.
* @since 2006-2-2 f#;>g
* @version 1.0 ;pAK_>
*/ GOPfXtkC
public class ImprovedMergeSort implements SortUtil.Sort { ;p//QJB9
LoV<:|GTI
private static final int THRESHOLD = 10; jp,4h4C^)
K0~rN.C!0
/* jd:6:Fm
* (non-Javadoc) R&&4y 7
* A^g(k5M*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nb\4 /;#
*/ F5<Hm_\:
public void sort(int[] data) { V0@=^Bls
int[] temp=new int[data.length]; e+WNk 2
mergeSort(data,temp,0,data.length-1); Vr}'.\$
} l#o ~W`
!0+JbZ<%r|
private void mergeSort(int[] data, int[] temp, int l, int r) { 1M6D3d_
int i, j, k; a(nlTMfu
int mid = (l + r) / 2; dd;~K&_Q/i
if (l == r) 4Z*/WsCv
return; )7F/O3Tq
if ((mid - l) >= THRESHOLD) 4RO}<$Nx}
mergeSort(data, temp, l, mid); 4s-!7
else th_oJcS
insertSort(data, l, mid - l + 1); sC'`~}C
if ((r - mid) > THRESHOLD) G{}VPcrbC
mergeSort(data, temp, mid + 1, r); @JMiO^
else C+$#y2"z#n
insertSort(data, mid + 1, r - mid); $4LzcwG
M3\AY30L
for (i = l; i <= mid; i++) { 79gT+~z
temp = data; N8jIMb'<
} <~)P7~$d?p
for (j = 1; j <= r - mid; j++) { k[xSbs'D
temp[r - j + 1] = data[j + mid]; 0mE 0 j
} pBHRa?Y5
int a = temp[l]; x5Bk/e'
int b = temp[r]; 3og.y+.=U.
for (i = l, j = r, k = l; k <= r; k++) { _6Sp QW
if (a < b) { B\~}3!j
data[k] = temp[i++]; oJ^P(]dw
a = temp; X?O[r3<
} else { K;?+8(H
data[k] = temp[j--]; y[;>#j$
b = temp[j]; l?e.9o2-
} I7onX,U+
} ="+#W6bZT
} A.SvA Yn
?,z}%p
/** $Sq:q0
* @param data )lkjqFQ(
* @param l `Di{}/2
* @param i Oketwa
*/ J.a]K[ci
private void insertSort(int[] data, int start, int len) { x2xRBkRg=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V3Bz Mw\9r
} >4TO=i
} z{ dEC %
} &C}*w2]0S
} =_CzH(=f#
rq{$,/6.
堆排序： -).C
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package org.rut.util.algorithm.support; 81F9uM0
X|dlt{Gf
import org.rut.util.algorithm.SortUtil; yi[x}ffdE
Rq-ZL{LR7
/** -"x$ZnHU
* @author treeroot ]Wup/o
* @since 2006-2-2 W/N7vAx X
* @version 1.0 5xiEPh
*/ ).O)p9
public class HeapSort implements SortUtil.Sort{ KNl$3nX
inL(X;@yo
/* (non-Javadoc) tQVVhXQ7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @7}W=HB
*/ >P(.:_^p
public void sort(int[] data) { Uo49*Mr
MaxHeap h=new MaxHeap(); ?,/ }`3Vw
h.init(data); (3e2c
for(int i=0;i h.remove(); kJU2C=m@e2
System.arraycopy(h.queue,1,data,0,data.length); " bG2:
} u8^lB7!e/
`[A];]
private static class MaxHeap{ Iu{V,U
@Qe0! (_=
void init(int[] data){ Z+SRXKQ
this.queue=new int[data.length+1]; \U0Q<ot/7
for(int i=0;i queue[++size]=data; S:}7q2:
fixUp(size); +T ?NH9
} 'u658Tj
} f);FoVa6
vO=fP_
private int size=0; #yen8SskB
tPvpJX6kP
private int[] queue; =4!mAo}
6!o1XQr=Z
public int get() { hTkyz la
return queue[1]; jPeYmv]
} <@}9Bid!o
al0L&z\
public void remove() { jIyQ]:*p
SortUtil.swap(queue,1,size--); Kw}'W 8`c
fixDown(1); M5B# TAybC
} zs;JJk^
file://fixdown a*;b^Ze`v
private void fixDown(int k) { CTK;dM'uQ
int j; *Ex|9FCt$
while ((j = k << 1) <= size) { 1YA% -~
if (j < size %26amp;%26amp; queue[j] j++; @HW*09TG
if (queue[k]>queue[j]) file://不用交换 ESs\O?nO
break; ysN3
SortUtil.swap(queue,j,k); 'qi}|I
k = j; P>L +t`'
} 58K5ZZG
} RSds8\tk
private void fixUp(int k) { )jj0^f1!j
while (k > 1) { J,G lIv.A
int j = k >> 1; QJNFA}*>
if (queue[j]>queue[k]) mOSv9w#,
break; 4Hg9N}
SortUtil.swap(queue,j,k); kza5ab
k = j; V]&\fk-{
} R]dg_Da
} wr4:Go`
NI5``BwpO
} fM}#ON>Z
+p^u^a
} Bx!-"e
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SortUtil： tkhCw/
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package org.rut.util.algorithm; 67TwPvh
+(*DT9s+
import org.rut.util.algorithm.support.BubbleSort; {*KEP
import org.rut.util.algorithm.support.HeapSort; $(9U@N9E
import org.rut.util.algorithm.support.ImprovedMergeSort; !W0v >p
import org.rut.util.algorithm.support.ImprovedQuickSort; A >$I -T+
import org.rut.util.algorithm.support.InsertSort; T}P".kpbS
import org.rut.util.algorithm.support.MergeSort; rIhl.5Y
import org.rut.util.algorithm.support.QuickSort; Nkl_Ho,
import org.rut.util.algorithm.support.SelectionSort; @$c\dvO
import org.rut.util.algorithm.support.ShellSort; k |%B?\m
}J1tdko#
/** .CU5}Tv-
* @author treeroot qX
* @since 2006-2-2 ?yR&/a
* @version 1.0 &n?^$LTPY
*/ 9;Ox;;w
public class SortUtil { :Q_<Z@2Y{
public final static int INSERT = 1; M9@ri^x
public final static int BUBBLE = 2; TGe;HZ
public final static int SELECTION = 3; T{Uc:Z
public final static int SHELL = 4; c|62jY"$-2
public final static int QUICK = 5; okv1K
public final static int IMPROVED_QUICK = 6; C{DvD'^
public final static int MERGE = 7; Dzs[GAQ]
public final static int IMPROVED_MERGE = 8; YY!6/5*/]
public final static int HEAP = 9; \y)
J@X'PG< 6B
public static void sort(int[] data) { ";Rtiiu
sort(data, IMPROVED_QUICK); $8[r9L!
} !PJ6%"
private static String[] name={ 78OIUNm`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" QC;^xG+W
}; W.0L:3<"
Z%Zd2 v
private static Sort[] impl=new Sort[]{ `Ru3L#@
new InsertSort(), nMvKTH
new BubbleSort(), {0^&SI"5`E
new SelectionSort(), ?Poq2
new ShellSort(), ehG/zVgn
new QuickSort(), Ve!fU
new ImprovedQuickSort(), D{d>5P?W
new MergeSort(), HnCzbt@
new ImprovedMergeSort(), m"jV}@agX
new HeapSort() ) ^3avRsC
}; p4i]7o@
/BV03B
public static String toString(int algorithm){ x61U[/r
return name[algorithm-1]; H;fxxu`cS
} z0*_^MH
}HYjA4o\A
public static void sort(int[] data, int algorithm) { jR#~I@q^
impl[algorithm-1].sort(data); _({A\}Q|
} =xJKIu
G0;XaL:
public static interface Sort { _}VloiY
public void sort(int[] data); ?Wt$6{)
} pd8Nke
'ao"9-c
public static void swap(int[] data, int i, int j) { s)2fG\1
int temp = data; {aC!~qR
data = data[j]; &F5@6nJ`
data[j] = temp; Bk\Gj`"7
} \qR %%S
} ADk8{L{UU