[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; rUjdq/I:Z
} E|$Oha[
int i1=l; :aIN9;
int i2=mid+1; ?P7]u>H
for(int cur=l;cur<=r;cur++){ Q!FLR>8
if(i1==mid+1) M8b4NF_&
data[cur]=temp[i2++]; rBN)a"
else if(i2>r) io3yLIy,
data[cur]=temp[i1++]; 1lnU77;
else if(temp[i1] data[cur]=temp[i1++]; [!VOw@uz
else :9|W#d{o
data[cur]=temp[i2++]; 8Z2.`(3c[
} :` $@}GI
} ozr9>b>M
Pu>N_^ C
} t=#Pya
41 vL"P K
改进后的归并排序: qUF1XJZ}z
?Jtg3AY
package org.rut.util.algorithm.support; `4CWE_k
C+MSVc
import org.rut.util.algorithm.SortUtil; i$-#dc2qY
6bZ[Kt
/** H%z@h~s>
* @author treeroot i3 )xX@3
* @since 2006-2-2 !|m9|
* @version 1.0 <V_7|)'/A
*/ u:`y]
public class ImprovedMergeSort implements SortUtil.Sort { hGP1(pH.
ZcryAm:I
private static final int THRESHOLD = 10; =`I?mn&
LN!W(n(
/* %TK&)Q% h5
* (non-Javadoc) C 7nKk/r
* mT_GrIl[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ds5NAp:x
*/ <4D%v"zRP
public void sort(int[] data) { FUaNiAr[
int[] temp=new int[data.length]; a%~yol0wO7
mergeSort(data,temp,0,data.length-1); Gidkt;lj
} L=7rDW)aa
%N~;{!![p
private void mergeSort(int[] data, int[] temp, int l, int r) { Gm&2R4)EP
int i, j, k; }~*rx7p
int mid = (l + r) / 2; qB JRS'6'9
if (l == r) YIDg'a+z
return; d1NE%hg3
if ((mid - l) >= THRESHOLD) 5V|tXsy:
mergeSort(data, temp, l, mid); SLA#= K
else #Si|!
insertSort(data, l, mid - l + 1); )Z:m)k>r;
if ((r - mid) > THRESHOLD) $j !8?
mergeSort(data, temp, mid + 1, r); +(AwSh!
else [s %\.y(q
insertSort(data, mid + 1, r - mid); 3o7xN=N
@}G|R\2P
for (i = l; i <= mid; i++) { HWR&C
temp = data; kGj]i@(PA4
} Vw?P.4
for (j = 1; j <= r - mid; j++) { 7xR|_+%~K
temp[r - j + 1] = data[j + mid]; K-<n`zg3
} a^*B5G1(&
int a = temp[l]; f<=^ 4a
int b = temp[r]; *lY+Yy(
for (i = l, j = r, k = l; k <= r; k++) { >";%2u1
if (a < b) { 7rPLnB]
data[k] = temp[i++]; _3zU,qm+
a = temp; iGyVG41U
} else { %8g$T6E[<2
data[k] = temp[j--]; 1+FYjh!2t
b = temp[j]; L<"k7)k
} HWOek"}Z[
} H7J`]nr6
} w8U2y/:>
7:ckq(89
/** i:R!T,
* @param data cyDiA(ot&
* @param l _82<|NN:
* @param i Mn-<51.%
*/ q^u6f?B
private void insertSort(int[] data, int start, int len) { %~ ;nlDw
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); [p2g_bI8yK
} 4b]IazL)
} Hu[8HzJo
} (di)`D5Q
} 1 VPg`+o
ks)fQFSbu
堆排序： @+[Y0_
@2QJm
package org.rut.util.algorithm.support; *G8'Fjin'T
Oz_b3r
import org.rut.util.algorithm.SortUtil; k*A4;Bm
l!xgtP K
/** +#&el//
* @author treeroot :-W$PIBe
* @since 2006-2-2 d@_'P`%-
* @version 1.0 H@VBP Q}Q
*/ ]W89.><%14
public class HeapSort implements SortUtil.Sort{ 7Y|Wy Oq
F#zQQ)(Pf
/* (non-Javadoc) bcGn8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0j-F6a*p'1
*/ roK4RYJ7)
public void sort(int[] data) { !XG/,)A
MaxHeap h=new MaxHeap(); =|DkD- O
h.init(data); XFLjVrX[
for(int i=0;i h.remove(); RXCygPT
System.arraycopy(h.queue,1,data,0,data.length); gK]T}
} +'{:zN5m
v=8~ZDY
private static class MaxHeap{ hfP(N_""S
.pNq-T
void init(int[] data){ $n_sGr
this.queue=new int[data.length+1]; r(`8A:#d
for(int i=0;i queue[++size]=data; qrORP3D@
fixUp(size); AmrJ_YP/t~
} Rwi5+;N
} `zV-1)=
0Zp<=\!;
private int size=0; [jmAMF<F
's%ct}y\J
private int[] queue; f{oxF?|89
\t7zMp
public int get() { Hr_x~n=w
return queue[1]; $;g%S0:3)
} Iclan\q#y
>O[^\H!\
public void remove() { ]'z^Kt5S
SortUtil.swap(queue,1,size--); 4pOc`
fixDown(1); e^K=8IW
} A&@jA5Jb
file://fixdown [~rk`
private void fixDown(int k) { [pyXX>:M
int j; }j5@\c48
while ((j = k << 1) <= size) { 5la]l
if (j < size %26amp;%26amp; queue[j] j++; 1Y"y!\t7G
if (queue[k]>queue[j]) file://不用交换 '$&(+>)z`
break; >0G}, S
SortUtil.swap(queue,j,k); nD{;4$xP`
k = j; "{1}
} 7G #e~,M5
} &JzF
private void fixUp(int k) { bJ5z??
while (k > 1) { x'PjP1
int j = k >> 1; Xf/<.5A
if (queue[j]>queue[k]) GA@Q:n8UuR
break; zAdVJ58H
SortUtil.swap(queue,j,k); [(ib9_`A'1
k = j; IF21T
} KPvYq?F>4
} BN>$LL
,lGwW8$R
} #1lS\!
i: uA&9
} h 7P?n.K
_|#|mb4Fe
SortUtil： E MbI\=>yS
]cY'6'}Hz
package org.rut.util.algorithm; @(5RAYRV
tQ<2K*3]
import org.rut.util.algorithm.support.BubbleSort; ?B4QTx9B
import org.rut.util.algorithm.support.HeapSort; Y2$`o4*3
import org.rut.util.algorithm.support.ImprovedMergeSort; aWK7 -n
import org.rut.util.algorithm.support.ImprovedQuickSort; QU;C*}0Zl
import org.rut.util.algorithm.support.InsertSort; yodrX&"
import org.rut.util.algorithm.support.MergeSort; DcM+K@1E4^
import org.rut.util.algorithm.support.QuickSort; `I:,[3_/
import org.rut.util.algorithm.support.SelectionSort; eEFT(e5.>3
import org.rut.util.algorithm.support.ShellSort; ^IZ0M1&W;
*wx^mB9
/** nUu|}11(
* @author treeroot p;01a
* @since 2006-2-2 akoKx)(<
* @version 1.0 C#cEMKa
*/ aM1JG$+7G
public class SortUtil { `-\JjMSQ1
public final static int INSERT = 1; AV`7>@
public final static int BUBBLE = 2; 9~af\G
public final static int SELECTION = 3; $h f\ #'J
public final static int SHELL = 4; ~1!kU4
public final static int QUICK = 5; t;6/bT-
public final static int IMPROVED_QUICK = 6; &^>r<~]
public final static int MERGE = 7; >U.uRq
public final static int IMPROVED_MERGE = 8; $5[RR
public final static int HEAP = 9; MM7gMAA.mz
v2g+oKO]
public static void sort(int[] data) { 06O
sort(data, IMPROVED_QUICK); sP8B?Tn1W
} |e(x< [s5
private static String[] name={ p.olXP
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 9)X<}*(qo
}; {S~$\4vC!
-|mRJVl8
private static Sort[] impl=new Sort[]{ HN)QS5
new InsertSort(), +r"$?bw'
new BubbleSort(), m#p^'}]!;
new SelectionSort(), =jh:0Q<43+
new ShellSort(), 8tk`1E8!j
new QuickSort(), bp_@e0
new ImprovedQuickSort(), djM=QafB:C
new MergeSort(), E$ rSrT(
new ImprovedMergeSort(), {F[Xe_=#"
new HeapSort() F*H}5yBp_:
}; 9NAlgET
GC2<K
public static String toString(int algorithm){ b.+\qaR
return name[algorithm-1]; c i>=45@J
} yFqC-t-i
&B C#u.^!
public static void sort(int[] data, int algorithm) { ~Otf "<
impl[algorithm-1].sort(data); on$a]zx'@
} :SGQ4@BV
6h%(0=^
public static interface Sort { ]Re<7_xt
public void sort(int[] data); g(^l>niF:
} w8Yff[o
\;<Y/sg
public static void swap(int[] data, int i, int j) { NGu]|p
int temp = data; E%N]t} }[
data = data[j]; Heu@{t.[!D
data[j] = temp; U$}]zaB
} 2_C.-;!
} *k -UQLJ