[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; n2mw@Ay!
} ox_h9=$-
int i1=l; r.b6E%D
int i2=mid+1; 7J;~&x
for(int cur=l;cur<=r;cur++){ hIQ[:f
if(i1==mid+1) n u8j_grW
data[cur]=temp[i2++]; q#&#*6 )B
else if(i2>r) }t2pIkF;
data[cur]=temp[i1++]; b8Rh|"J)d
else if(temp[i1] data[cur]=temp[i1++]; : W^\ mH
else J7ekIQgR
data[cur]=temp[i2++]; SMO%sZ]
} 2 dD<]
} 0?us]lx
r?nV Sb|[
} 'UVv(-
@CU|3Qg
改进后的归并排序: 4spaw?j
nRB>[lG
package org.rut.util.algorithm.support; $Oe58
%s2"W~
import org.rut.util.algorithm.SortUtil; ;Uqx&5P}
"qTC(F9N$.
/** Q 95
* @author treeroot P%`R7yk
* @since 2006-2-2 \678Nx
* @version 1.0 e( o/we{
*/ R96o8#7Uv
public class ImprovedMergeSort implements SortUtil.Sort { IR dz(~CP
@B'8SLoP
private static final int THRESHOLD = 10; bsi q9$F
@'r`(o3z!Z
/* Ui|a}`c
* (non-Javadoc) Z;y}gv/{
* As'M39*V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^T&u!{82j
*/ Z!-<rajl
public void sort(int[] data) { gZ"{{#:}
int[] temp=new int[data.length]; >3`ctbe
mergeSort(data,temp,0,data.length-1); r\n h.}s
} VuMDV6^Z
W B*`zCM
private void mergeSort(int[] data, int[] temp, int l, int r) { 5Ue^>8-
int i, j, k; v^],loi<V
int mid = (l + r) / 2; <`xRqe:&9
if (l == r) Kt90mA
return; \8*,&ak%
if ((mid - l) >= THRESHOLD) 4 ?@uF[
mergeSort(data, temp, l, mid); aT1CpY=T|.
else ah/6;,T
insertSort(data, l, mid - l + 1); Hx2j=Q_dw
if ((r - mid) > THRESHOLD) nE,gQHw
mergeSort(data, temp, mid + 1, r); 6Sb'Otw.
else Ef`5fgp? S
insertSort(data, mid + 1, r - mid); sK 1m9
[B~zoB(
for (i = l; i <= mid; i++) { L.0} UXd
temp = data; :Q r7:$S^
} 2Ph7qEBQ22
for (j = 1; j <= r - mid; j++) { a4jnu:e
temp[r - j + 1] = data[j + mid]; KBr5bcm4u
} Wt+y-ES
int a = temp[l]; cUZ!;*
int b = temp[r]; loC5o|Wh
for (i = l, j = r, k = l; k <= r; k++) { 7c29Ua~[
if (a < b) { _.OMjUBZT
data[k] = temp[i++]; f1Yv hvWL
a = temp; 1V**QSZ1
} else { /SCZ&
data[k] = temp[j--]; tT* W5
b = temp[j]; YZBzv2'\x
} qsft*&
} ^EUOmVN
} LN.Bd,
?BDlB0jxzi
/** \L9?69B~
* @param data V8nz-DL{
* @param l :n+y/6*
* @param i $ o5V$N D
*/ T^'*_*m
private void insertSort(int[] data, int start, int len) { ?+ -/';
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); FI`nRFq)C
} (pE\nuA\
} 7TV>6i+7
} %;<k(5bhGJ
} J\xz^%p
ycrh5*g
堆排序： )'j_D<
)l!J$X+R
package org.rut.util.algorithm.support; @jE d%W
} T/}0W]0
import org.rut.util.algorithm.SortUtil; (RDa,&
rysP)e
/** )e|$K= D
* @author treeroot k+WO &g*|
* @since 2006-2-2 *#Lsjk~_-
* @version 1.0 C`NBHRa>
*/ V4`:Vci Aw
public class HeapSort implements SortUtil.Sort{ Ms:KM{T0
5w,lw
/* (non-Javadoc) *or2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _'!N q
*/ L876$
public void sort(int[] data) { $ ]W[y=
MaxHeap h=new MaxHeap(); LsJs Q h
h.init(data); d`?U!?Si
for(int i=0;i h.remove(); <OR.q
System.arraycopy(h.queue,1,data,0,data.length); `W"a!,s2
} K2x6R
d,Cz-.'sOf
private static class MaxHeap{ 0a2$P+p
7m|`tjQ1
void init(int[] data){ F@=e2e 4
this.queue=new int[data.length+1]; }[>RxHd
for(int i=0;i queue[++size]=data; 1P[I}GW#
fixUp(size); VM-qVd-
} _=|nOj39
} _l24Ba$F6
}g>dn
private int size=0; HF&h
7oZ@<QP'
private int[] queue; nd$H 3sf
|~@x4J5,
public int get() { --in+
return queue[1]; RNv{n mf
} Iz6ss(UJ
U8-Q'1IT&
public void remove() { j>$=SMc
SortUtil.swap(queue,1,size--); pau*kMu^}
fixDown(1); vF9*tK'
} n9]IBIthe
file://fixdown <O \tC81
private void fixDown(int k) { 6Gs{nFw
int j; ]regi- LGU
while ((j = k << 1) <= size) { p!HPp Ef+#
if (j < size %26amp;%26amp; queue[j] j++; "XGD:>Q.
if (queue[k]>queue[j]) file://不用交换 vnz[w=U
break; TpJg-F
SortUtil.swap(queue,j,k); |rr$U
k = j; snXB`UC
} 5z1\#" B[
} ~A8qeaP
private void fixUp(int k) { q%OcLZ<,
while (k > 1) { 4t&gW
int j = k >> 1; >EBZ$X
if (queue[j]>queue[k]) WW//heJe-
break; +<pVf%u5
SortUtil.swap(queue,j,k); nGq]$h
k = j; 0zg2g!lh
} {V}t'x`4c
} y=[gQJ6~r
lq:]`l,6@
} FWuw/b$
/Jh1rck
} $T"h";M)s
Ap11b|v
SortUtil： GxYW4b
Z7JKaP9{:
package org.rut.util.algorithm; <_"B}c/2$
Gx.P]O3
import org.rut.util.algorithm.support.BubbleSort; O4m(Er@a
import org.rut.util.algorithm.support.HeapSort; A5sf
import org.rut.util.algorithm.support.ImprovedMergeSort; 9wAA. -"
import org.rut.util.algorithm.support.ImprovedQuickSort; "Z;~Y=hC13
import org.rut.util.algorithm.support.InsertSort; z'7#"D
import org.rut.util.algorithm.support.MergeSort; <KKDu$W|T
import org.rut.util.algorithm.support.QuickSort; MQwIPjk8
import org.rut.util.algorithm.support.SelectionSort; vTpStoUM
import org.rut.util.algorithm.support.ShellSort; D,c!#(v cK
JT4wb]kdV
/** JDkCUN5
* @author treeroot :~vxZ*a
* @since 2006-2-2 "Owct(9
* @version 1.0 rVUUH!
*/ 0yn[L3x7
public class SortUtil { n%F-cw
public final static int INSERT = 1; py]KTRzy
public final static int BUBBLE = 2; #X#8ynt
public final static int SELECTION = 3; W0Ktw6
public final static int SHELL = 4; 9Hu d|n
public final static int QUICK = 5; ]53O}sH>
public final static int IMPROVED_QUICK = 6; F7\BF
public final static int MERGE = 7; Takt_N
public final static int IMPROVED_MERGE = 8; gXLCRn!iR
public final static int HEAP = 9; @zo7.'7P
G;/Q>V
public static void sort(int[] data) { YnSbw3U.I
sort(data, IMPROVED_QUICK); 5QAdcEcN@O
} G@9u:\[l
private static String[] name={ 5B1G?`]?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" NeHx2m+
}; BYS lKTh
P^"R4T
private static Sort[] impl=new Sort[]{ M~als3
new InsertSort(), H#+\nT2m
new BubbleSort(), jk )Vb
new SelectionSort(), 3S5^`Ag#
new ShellSort(), ZI,j?i6\
new QuickSort(), y`4{!CEyLW
new ImprovedQuickSort(), 4:D:|r
new MergeSort(), b6|Z"{TI _
new ImprovedMergeSort(), &M[MEO`t8
new HeapSort() )Nbc/nB$
}; _mXs4
|8bE9qt.P
public static String toString(int algorithm){ lK*jhW?3:
return name[algorithm-1]; fmFzW*,E
} S.: 7k9
6JSY56v
public static void sort(int[] data, int algorithm) { EJ`Q8uz
impl[algorithm-1].sort(data); :/6()_>bO
} E4r.ky`#~
I FsE!oDs4
public static interface Sort { ur6e&bTp
public void sort(int[] data); #,&8&
} _wz2
J_PH7Z*=,
public static void swap(int[] data, int i, int j) { E tx`K5Tr]
int temp = data; #1[z;Mk0
data = data[j]; OqBC/p B
data[j] = temp; #F!Kxks
} fz3lR2~G
} {(}yG_Q]!