[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; Zs0;92WL
} Kx[+$Qt
int i1=l; ~z41$~/
int i2=mid+1; .2rpQa/h
for(int cur=l;cur<=r;cur++){ Y>E` 7n
if(i1==mid+1) #jxPh!%9
data[cur]=temp[i2++]; .bV^u
else if(i2>r) *>EV4Hl
data[cur]=temp[i1++]; m4~~q[t
else if(temp[i1] data[cur]=temp[i1++]; c":2<:D&
else e<A>??h^
data[cur]=temp[i2++]; E)p[^1WC
} (VCJn<@@
} H8@z/
XfIsf9
} )"tM[~e`
]H`pM9rC
改进后的归并排序: X g7xy>{]
nemC-4}
package org.rut.util.algorithm.support; 6"[,
`4Z:qh+fJ
import org.rut.util.algorithm.SortUtil; 6I_4{
?vik2RW
/** \SgBI/L^
* @author treeroot &(o&Y
* @since 2006-2-2 >G[:Q s
* @version 1.0 h y\iot
*/ X*Q<REDB
public class ImprovedMergeSort implements SortUtil.Sort { 0E3;f;'X
*|6vCR
private static final int THRESHOLD = 10; ]_!NmB_3
nI73E
/* LH@Kn?R6
* (non-Javadoc) R$eEW"]
* )T slI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r#}o +3*
*/ >B$ IrM7J
public void sort(int[] data) { _3g!_
int[] temp=new int[data.length]; }-Nc}%5
mergeSort(data,temp,0,data.length-1); olHmRJ
} z 7cA5'c
NJ$Qm.S
private void mergeSort(int[] data, int[] temp, int l, int r) { egWfKL&iy
int i, j, k; Efpju(
int mid = (l + r) / 2; rNke&z:%X_
if (l == r) TOvsW<cM
return; $p}q,f.
if ((mid - l) >= THRESHOLD) urL@SeV+$
mergeSort(data, temp, l, mid); *u[@C
else s,|v,,<+
insertSort(data, l, mid - l + 1); T#H-GOY:
if ((r - mid) > THRESHOLD) /p}pdXS
mergeSort(data, temp, mid + 1, r); R_:lp\S&
else (@*%moo
insertSort(data, mid + 1, r - mid); [KW)z#`*
@RdNAP_6
for (i = l; i <= mid; i++) { 3@0!]z^W
temp = data; u0ZMrIJ
} Pvm pWa
for (j = 1; j <= r - mid; j++) { p~-)6)We?
temp[r - j + 1] = data[j + mid]; R3#| *)q
} 9`&sZ|"3
int a = temp[l]; |uM=pm;H
int b = temp[r]; <c,iu{:
for (i = l, j = r, k = l; k <= r; k++) { ?. L]QU
if (a < b) { W yP]]I.
data[k] = temp[i++]; 4dI`
a = temp; +5:9?&lH
} else { 4~d:@Gmk&
data[k] = temp[j--]; #=F{G4d)!=
b = temp[j]; !|J2o8g
} \MAv's4b@
} 7G Jhc
} cNy*< Tv
@,]$FBT"5
/** [a#*%H{OC
* @param data M'NOM>8
* @param l Lr "V
* @param i j}G9+GX~,
*/ 5E${
private void insertSort(int[] data, int start, int len) { h~=~csya:
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~KxK+6[ :
} HeHo?<>|d
} "'Q~&B;@
} r;"Qu
} (J j'kW6G6
8(!?y[
堆排序： z;&J9r$`
rFW,x_*_vP
package org.rut.util.algorithm.support; l% {<+N
i06|P I
import org.rut.util.algorithm.SortUtil; aL8Z|*
]1q`N7
/** ztC,[
* @author treeroot T>5N$i
* @since 2006-2-2 hz-^9U
* @version 1.0 pO N@
*/ PJ)d5D%T
public class HeapSort implements SortUtil.Sort{ w!Ii
|O*?[|`H
/* (non-Javadoc) jZ<f-Ff0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'pT8S
*/ K/!>[d
public void sort(int[] data) { L,sXJ23.
MaxHeap h=new MaxHeap(); 8?hj}}H
h.init(data); K6nNrd}p:
for(int i=0;i h.remove(); M1K[6V!
System.arraycopy(h.queue,1,data,0,data.length); ii ^Nxnc=
} LiJ./
'D^@e0.3
private static class MaxHeap{ f3mQd}<L
F^!_!V B
void init(int[] data){ Aj"fkY|Q
this.queue=new int[data.length+1]; YcM0A~<
for(int i=0;i queue[++size]=data; oLt%i:,A
fixUp(size); + ;B K|([#
} ,d8*7my
} 2&2t8.<
w(q\75
private int size=0; i(S}gH4*o
IG4`f~k^
private int[] queue; N{K[sXCW
({hW
public int get() { PC& (1kJ
return queue[1]; A3Vj3em
} (l)r.Vj
-D wO*f
public void remove() { >NtJ)N*
SortUtil.swap(queue,1,size--); 8q|T`ac+N
fixDown(1); W;.LN<bx
} eY(JU5{
file://fixdown -K0!wrKC
private void fixDown(int k) { G@,XUP
int j; piAFxS<6
while ((j = k << 1) <= size) { dK7BjZTJo
if (j < size %26amp;%26amp; queue[j] j++; E7@m& R
if (queue[k]>queue[j]) file://不用交换 1*OZu.NdK
break; ;sY n=r
SortUtil.swap(queue,j,k); $6/CTQ
k = j; 9*? i89T
} |GP1[Q{
} D3C3_ @*
private void fixUp(int k) { g 4lk
while (k > 1) { \C"hL(4-
int j = k >> 1; A7zL\U4
if (queue[j]>queue[k]) EskD)Sl
break; mfr7w+DK
SortUtil.swap(queue,j,k); Z':w X
k = j; `'b2 z=j
} = Tq\Ag:
} 1"RC!
8]l(D
} 70N Lv
mN1n/LNi
} Mo[yRRS#
^8 cq qu
SortUtil： mh,a}bX{
}k_'a^;C1
package org.rut.util.algorithm; "_n})s f
?l^NKbw
import org.rut.util.algorithm.support.BubbleSort; \W"p<oo|H
import org.rut.util.algorithm.support.HeapSort; _''9-t;n,
import org.rut.util.algorithm.support.ImprovedMergeSort; >ui;B$=
import org.rut.util.algorithm.support.ImprovedQuickSort; v`r*Yok;`
import org.rut.util.algorithm.support.InsertSort; {z |+.D
import org.rut.util.algorithm.support.MergeSort; HD>UTX`&mc
import org.rut.util.algorithm.support.QuickSort; ,(z"s8N
import org.rut.util.algorithm.support.SelectionSort; X>U _v
import org.rut.util.algorithm.support.ShellSort; @$5=4HA
y`J8hawp
/** !PJp()
* @author treeroot 8T3Nz8Q7
* @since 2006-2-2 c2fw;)j&X
* @version 1.0 5GDg_9Bz
*/ aJ J63aJ
public class SortUtil { gm7 [m}
public final static int INSERT = 1; ? w@)3Z=u
public final static int BUBBLE = 2; fY!9i5@'
public final static int SELECTION = 3; E*d UJ.>
public final static int SHELL = 4; il$eO 7
public final static int QUICK = 5; u4DrZ-v
public final static int IMPROVED_QUICK = 6; UZJ#/x5F
public final static int MERGE = 7; H}gp`YW:4
public final static int IMPROVED_MERGE = 8; =!IoL7x
public final static int HEAP = 9; ,z`* 1b8
L`"V_ "Q#0
public static void sort(int[] data) { zB'_YwW
sort(data, IMPROVED_QUICK); O[F
} jt3=<&*Bm
private static String[] name={ gPIl:, d(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %#E$wz
}; W>&!~9H
q$'[&&_
private static Sort[] impl=new Sort[]{ *s|'V+1
new InsertSort(), bmO(tQS$5
new BubbleSort(), ku GaOO
new SelectionSort(), 3(_:"?xA
new ShellSort(), XzPUll;ZU
new QuickSort(), W6V((84(O
new ImprovedQuickSort(), >LJ<6s[=
new MergeSort(), &!B4v<#,U
new ImprovedMergeSort(), ~#7uNH2
new HeapSort() nxe9^h7m
}; \f@obp
Bv#?.0Ez;
public static String toString(int algorithm){ -@.FnFa
return name[algorithm-1]; -Sa-eWP
} $J#Z`%B^y
XT1P. w[aA
public static void sort(int[] data, int algorithm) { @?bY,
impl[algorithm-1].sort(data); g-4ab|F
} .TNGiUzG
f( <O~D
public static interface Sort { A[m<xtm5K
public void sort(int[] data); >v)V2,P -
} RSCQ`.
hp@F\9j
public static void swap(int[] data, int i, int j) { S84S/y
int temp = data; AOef1^S=
data = data[j]; `x;m@\R
data[j] = temp; rA}mp]
} ha7mXGN%
} 3 6t^iV*3