[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; 4o3GS8
} B .mV\W
int i1=l; ?r<F\rBT7*
int i2=mid+1; cIp h$@
for(int cur=l;cur<=r;cur++){ Fe.*O`
if(i1==mid+1) A2d2V**Z
data[cur]=temp[i2++]; v3Yj2LSqx
else if(i2>r) 3D0I5LF&
data[cur]=temp[i1++]; &?6w2[}
else if(temp[i1] data[cur]=temp[i1++]; vNbA/sM
else cG:`Zj~4
data[cur]=temp[i2++]; HV.7IyBA^
} \irjIXtV
} ex458^N_
o=QF>\\
} Pa +BE[z
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改进后的归并排序: w ZAXfNA
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package org.rut.util.algorithm.support; ~*Qpv&y)
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import org.rut.util.algorithm.SortUtil; su;S)yZb
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/** [Gy'0P(EQ
* @author treeroot Zd ,=
* @since 2006-2-2 K3DJ"NJ<Ji
* @version 1.0 TP::y
*/ jqWvLBU!
public class ImprovedMergeSort implements SortUtil.Sort { D:tZiS=0
a HL '(<
private static final int THRESHOLD = 10; T(^8ki
t}*!UixE
/* +Uq:sfj,
* (non-Javadoc) l0if#?4\r
* Tpx,41(k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z 5+]Z a~
*/ x)ZH;)
public void sort(int[] data) { J6D$ i+
int[] temp=new int[data.length]; Cpv%s 1M
mergeSort(data,temp,0,data.length-1); agT[y/gb
} Lu.tRZ`$38
q.Z#7~6`3
private void mergeSort(int[] data, int[] temp, int l, int r) { l>Ja[`X@
int i, j, k; @|%ICG c
int mid = (l + r) / 2; JBAK*g
if (l == r) M|e n>P
return; W r7e_
if ((mid - l) >= THRESHOLD) y7EX&
mergeSort(data, temp, l, mid); +\vY;!^
else 7Sq{A@ET
insertSort(data, l, mid - l + 1); {0WIDD
if ((r - mid) > THRESHOLD) FKnQwX.0
mergeSort(data, temp, mid + 1, r); -01 1U!
else l!V| T?
insertSort(data, mid + 1, r - mid); {<4?o? 1g
L4*fF
for (i = l; i <= mid; i++) { >E ;o"
temp = data; 1"B9Z6jf
} IYg3ve`x
for (j = 1; j <= r - mid; j++) { N<"6=z@w+
temp[r - j + 1] = data[j + mid]; x][9ptrh
} |SukiXJZF
int a = temp[l]; <ZC^H
int b = temp[r]; Yk@s"qm3
for (i = l, j = r, k = l; k <= r; k++) { AnE_<sPA
if (a < b) { ;6 6_G Sjz
data[k] = temp[i++]; ^O Xr: P
a = temp; c$<O0dI
} else { 7a]Zws
data[k] = temp[j--]; 5J\|gZQF
b = temp[j]; $]U5
} 3et2\wOX1x
} r]O@HVbt$
} sa(M66KkU
6O@ ^`T
/** p2c=;5|/Q
* @param data mx(%tz^t
* @param l ^r$iN %&~
* @param i (6#yw`\
*/ Q @OC=
private void insertSort(int[] data, int start, int len) { Pzm!`F^r}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #[0\=B-
} 6|>\&Y!Q
} pg}+lYGP
} (06Vcqg
} +b,31
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堆排序： b~Pxgfu"
&Wz`>qYL*
package org.rut.util.algorithm.support; &c<}++'h
yK%GsCJd:
import org.rut.util.algorithm.SortUtil; _`X#c-J
E4v_2Q -w
/** NzeI/f3K5
* @author treeroot )Rhff$
* @since 2006-2-2 01{r^ZT`RH
* @version 1.0 OBw`!G*w
*/ ;4/dk_~p]
public class HeapSort implements SortUtil.Sort{ *n*N|6+
SC $`
/* (non-Javadoc) s{z~Axup-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `l gjw=
*/ ueE?"Hk
public void sort(int[] data) { ]zvVY:v
MaxHeap h=new MaxHeap(); +{C9uY)$vf
h.init(data); 8pq-nuf|K
for(int i=0;i h.remove(); $nfBvf
System.arraycopy(h.queue,1,data,0,data.length); QLB1:O>
} s*)41\V0
=(|xU?OL
private static class MaxHeap{ Nr]8P/[~
NO+ 55n
void init(int[] data){ E&];>3C
this.queue=new int[data.length+1]; :<N6i/
for(int i=0;i queue[++size]=data; gaw4NZd)0
fixUp(size); Yt/SnF
} ;X$q#qzN#
} 1(%>`=R8
W<rTq0~$?
private int size=0; G+hF [b44'
>9.5-5"
private int[] queue; MS st
SvX=isu!.
public int get() { F%PwIB~cy
return queue[1]; ];pf
} Gq0]m
SY$J+YBLM
public void remove() { (@KoqwVWc
SortUtil.swap(queue,1,size--); "xDx/d8B
fixDown(1); |-(IJG#)
} N>A{)_k3
file://fixdown Ue{vg$5||
private void fixDown(int k) { /lS+J(I
int j; ?~aZ#%*i8
while ((j = k << 1) <= size) { atLV`U&t
if (j < size %26amp;%26amp; queue[j] j++; 1jH7<%y
if (queue[k]>queue[j]) file://不用交换 zd*3R+>U'>
break; k'[ S@+5
SortUtil.swap(queue,j,k); 49+ >f
k = j; $=PWT-GIR
} ~|CJsD/
} :W.jNV{e\F
private void fixUp(int k) { & Fg|%,fv]
while (k > 1) { )%iRZ\`f
int j = k >> 1; LbJtpwz>z
if (queue[j]>queue[k]) c Ndw9?Z
break; x],8yR)R
SortUtil.swap(queue,j,k); 2qZa9^}
k = j; .q0218l:dF
} uQGz;F x
} K-J|/eB
hD nM+4D
} kAZC"qM%i
lpl8h4d
} s<A*[
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SortUtil： ],;D2]<s
AIuMX4nb
package org.rut.util.algorithm; m"lE&AM64p
XzlKP;r0
import org.rut.util.algorithm.support.BubbleSort; Vh"MKJ'R^
import org.rut.util.algorithm.support.HeapSort; |h5kg<Zgo
import org.rut.util.algorithm.support.ImprovedMergeSort; ,f}h}
import org.rut.util.algorithm.support.ImprovedQuickSort; #F_'}?09%
import org.rut.util.algorithm.support.InsertSort; 5^)?mA
import org.rut.util.algorithm.support.MergeSort; +"]oc{W!
import org.rut.util.algorithm.support.QuickSort; U?bG`. X
import org.rut.util.algorithm.support.SelectionSort; 'oleB_B
import org.rut.util.algorithm.support.ShellSort; No:^hY:F8
mfXD1]<.
/** TE3*ktB{N
* @author treeroot 12idM*
* @since 2006-2-2 H76E+AY
* @version 1.0 Ci;h
*/ }l~]b3@qu
public class SortUtil { )T>8XCL\}
public final static int INSERT = 1; |y.zocBj
public final static int BUBBLE = 2; (~S<EUc$
public final static int SELECTION = 3; wD`[5~C{
public final static int SHELL = 4; Yt -W1vl
public final static int QUICK = 5; egfi;8]E
public final static int IMPROVED_QUICK = 6; *5e<\{!
public final static int MERGE = 7; cv3L&zg M
public final static int IMPROVED_MERGE = 8; Ig<}dM.Z[
public final static int HEAP = 9; o6*/o ]]
0z/h+,
public static void sort(int[] data) { x8Q~VVZr
sort(data, IMPROVED_QUICK); NdZ)[f:2
} 8=:A/47=J
private static String[] name={ JfMJF[Mb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" lqF>=15
}; 9qEOgJ
@8|Gh]\P
private static Sort[] impl=new Sort[]{ :AZp}
new InsertSort(), ?FN9rhAC
new BubbleSort(), ozU2
new SelectionSort(), h6g:(3t6m
new ShellSort(), `4LJ;KC(
new QuickSort(), F=srkw:*.
new ImprovedQuickSort(), EJ G2^DSS
new MergeSort(), wS V@=)H\:
new ImprovedMergeSort(), 3Y`>6A=
new HeapSort() !nwbj21%
}; NEMEY7De2
Uj,g]e8e
public static String toString(int algorithm){ $.a|ae|K
return name[algorithm-1]; 2 l(Dee Y
} B%fU'
*<r%aeG$em
public static void sort(int[] data, int algorithm) { k d+l k:
impl[algorithm-1].sort(data); 'j}g
} :9`qogF>
45)D+
public static interface Sort { &mcR
public void sort(int[] data); (xL :;
} uJY.5w
bEd?^h
public static void swap(int[] data, int i, int j) { t@)my[!
int temp = data; VD/&%O8n
data = data[j]; &$F[/[Ds+
data[j] = temp; i j/o;_
} <1 S+'
} 0R|K0XH#$