[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; kB#;s
} %*bGW'Cw
int i1=l; TmviYP gb
int i2=mid+1; (V(8E%<c
for(int cur=l;cur<=r;cur++){ mETGYkPUa
if(i1==mid+1) C[ma!he
data[cur]=temp[i2++]; hqDnmzG
else if(i2>r) Mi^/`1
data[cur]=temp[i1++]; yC&u^{~BC
else if(temp[i1] data[cur]=temp[i1++]; uKA-<nM._c
else 2I[(UMI$7
data[cur]=temp[i2++]; "!S7D>2y#
} E\5Cf2Ox
} O'rz
!kW~s_gUb*
} PAD&sTjE*
\+Nn>wW.
改进后的归并排序: ZrNBkfe:
U{,:-R
package org.rut.util.algorithm.support; @|2sF
#fVk;]u`[3
import org.rut.util.algorithm.SortUtil; ~J:qG9|]}
`RlMfd
/** SX)o0v+
* @author treeroot vu@@!cT6e
* @since 2006-2-2 zI7iZ"2a
* @version 1.0 )+ (GE
*/ pqF!1
public class ImprovedMergeSort implements SortUtil.Sort { }PUY~ u
e;8nujdG"
private static final int THRESHOLD = 10; ?Gnx!3Q
"}Oj N\
/* 7`J= PG$A
* (non-Javadoc) C2;Hugm4
* wh2Ljskda8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >F5E^DY
*/ XXg~eu?
public void sort(int[] data) { Y52TC@'
int[] temp=new int[data.length]; ;9;jUQ]MyG
mergeSort(data,temp,0,data.length-1); ?s5/
} >&[q`i{
E#n=aY~u-
private void mergeSort(int[] data, int[] temp, int l, int r) { SG@E*yT1
int i, j, k; TcpaZ 'x
int mid = (l + r) / 2; w6
if (l == r) !NO)|N>
return; K3^2;j1F Q
if ((mid - l) >= THRESHOLD) {k uC+~R
mergeSort(data, temp, l, mid); cT|aQM@iW
else pGcijD
insertSort(data, l, mid - l + 1); ms6dl-_t
if ((r - mid) > THRESHOLD) MlV3qM@
mergeSort(data, temp, mid + 1, r); O`f[9^fN
else 6KE?@3;Om
insertSort(data, mid + 1, r - mid); 4 3G2{
J-ErG!
for (i = l; i <= mid; i++) { IFbN ]N0
temp = data; b *Ca*!
} y_M,p?]^,
for (j = 1; j <= r - mid; j++) { n{"e8vQx
temp[r - j + 1] = data[j + mid]; (mgv:<c;BA
} ZC97Z sE
int a = temp[l]; a9!.e rM
int b = temp[r]; TFO4jjiC"
for (i = l, j = r, k = l; k <= r; k++) { y4%[^g~-
if (a < b) { 1T 8|>2m 3
data[k] = temp[i++]; i#%!J:_=
a = temp; i:2eJ.
} else { cH`ziZ<&m1
data[k] = temp[j--]; $Dm|ol.Z
b = temp[j]; @a}\]REn
} (/jZ&4T
} ,HwOMoP7
} }8dS[-.
Rg7~?b-
/** $q g/8G
* @param data 2h#_n'DV
* @param l |W*i'E
* @param i T7Qw1k
*/ zRFvWOxC\
private void insertSort(int[] data, int start, int len) { )#v0.pE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O0QK `F/)*
} i\C~]K~O!
} N*'d]P2P`J
} h 6juX'V
} z+]YB5zK%
v4VP7h6uD)
堆排序： 6tN!]
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package org.rut.util.algorithm.support; Rz"gPU4;`
HG&rE3@
import org.rut.util.algorithm.SortUtil; dPmNX-'7
:y^%I xs{1
/** NU%<Ws=
* @author treeroot kZNVUhW6S
* @since 2006-2-2 p* tAwl
* @version 1.0 ^ ^k]2oG
*/ J'@`+veE
public class HeapSort implements SortUtil.Sort{ /EV _Y|(-
.NT9dX
/* (non-Javadoc) TSUT3'&~p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JQH>{OB
*/ Qw.j
public void sort(int[] data) { 1Ts$kdO
MaxHeap h=new MaxHeap(); ,o sM|!,
h.init(data); s]2_d|Y
for(int i=0;i h.remove(); ,Kwtp)EX
System.arraycopy(h.queue,1,data,0,data.length); jn+BH3e
} Y(6p&I
b>f{o_
private static class MaxHeap{ fl o9iifZ
-HUlB|Q8r
void init(int[] data){ aLO'.5 ~^
this.queue=new int[data.length+1]; ;}4^WzmK^(
for(int i=0;i queue[++size]=data; `l+ pk%
fixUp(size); ?VR:e7|tU
} #pr{tL
} l G $s(
]OLe&VRix
private int size=0; @h!nVf%fe
';3#t(J;
private int[] queue; +|zcjI'=O
;ji["b
public int get() { M&^Iun
return queue[1]; pvYBhTz0
} rVv4R/3+
(X~JTH:e/
public void remove() { Ih^ziDcW
SortUtil.swap(queue,1,size--); BTDUT%Yfg
fixDown(1); ` *q>E
} !30BR|K*
file://fixdown ^n9)rsb
private void fixDown(int k) { kn&>4/')
int j; k%%0"+y#a
while ((j = k << 1) <= size) { R_2T"
if (j < size %26amp;%26amp; queue[j] j++; =pd#U
if (queue[k]>queue[j]) file://不用交换 0YO/G1O&
break; !dGSZ|YZ
SortUtil.swap(queue,j,k); PIM4c
k = j; qaiR329fx
} "I0F"nQ
} X{ f#kB]w
private void fixUp(int k) { )<[)7`
while (k > 1) { 4KB>O)YNg'
int j = k >> 1; IIO-Jr
if (queue[j]>queue[k]) ^0HgE;4
break; nd,2EX<bE
SortUtil.swap(queue,j,k); pB'{_{8aA
k = j; 0bl8J5Ar5
} 8 t`lRWJ
} ff5 e]^,
rmJ`^6V
} 1"f)\FPGe
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} q!AcMd\
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SortUtil： =XFyEt
#j4RX:T*[
package org.rut.util.algorithm; 0+Z?9$a1
ne 8rF.D
import org.rut.util.algorithm.support.BubbleSort; <op|yh3Jkk
import org.rut.util.algorithm.support.HeapSort; WB5M![
import org.rut.util.algorithm.support.ImprovedMergeSort; p(.z#o#
import org.rut.util.algorithm.support.ImprovedQuickSort; 47!k!cHa
import org.rut.util.algorithm.support.InsertSort; eS/Au[wS
import org.rut.util.algorithm.support.MergeSort; n!&F%|o^^
import org.rut.util.algorithm.support.QuickSort; pvhN.z
import org.rut.util.algorithm.support.SelectionSort; Y3O/`-9i
import org.rut.util.algorithm.support.ShellSort; X+QoO=02LR
c7A]\1 ~
/** nQ#NW8*Fs
* @author treeroot 9k;%R5(
* @since 2006-2-2 [F+*e=wjN>
* @version 1.0 l7#2 e ORm
*/ @ \*Zq
public class SortUtil { ?*&5`Xh
public final static int INSERT = 1; " TC:O^X
public final static int BUBBLE = 2; <&l@ ):a
public final static int SELECTION = 3; z@[-+Q:
public final static int SHELL = 4; La$?/\Dv)
public final static int QUICK = 5; ;%Kh~
public final static int IMPROVED_QUICK = 6; oZ>2Tt%
public final static int MERGE = 7; cUr5x8<W).
public final static int IMPROVED_MERGE = 8; kL"Y>@H
public final static int HEAP = 9; WHcw5_3#
2%vG7o,#
public static void sort(int[] data) { !+(H(,gI
sort(data, IMPROVED_QUICK); :{%~L4$HI
} !M}ZK(
private static String[] name={ eC`G0.op
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" A`*Sx"~jdx
}; OlM3G^1e1
P52qtN<
private static Sort[] impl=new Sort[]{ kOQ!]-;
new InsertSort(), Bz? (?fyd
new BubbleSort(), {bNVNG^
new SelectionSort(), fvRqt)Ks
new ShellSort(), ^bECX<,H
new QuickSort(), |y4j:`@.
new ImprovedQuickSort(), vG~JK[
new MergeSort(), ,6aF~p;wI|
new ImprovedMergeSort(), 5%w08
new HeapSort() \S>GtlQbn
}; d$y?py
{T3~js
public static String toString(int algorithm){ 7GRPPh<4
return name[algorithm-1]; a}[rk*QmZ
} n( zzH
t@jke
public static void sort(int[] data, int algorithm) { )H+p6<
impl[algorithm-1].sort(data); L=&}s[5
} EP{/]T
W8M(@* T
public static interface Sort { ~YXkAS:
public void sort(int[] data); "Fz1:VV&
} i<*W,D6
V0xO:7G^
public static void swap(int[] data, int i, int j) { *RFBLCt
int temp = data; j-wKm_M#jX
data = data[j]; *mn"GK6
data[j] = temp; S}6xkX
} @ssT$#)$!
} Tj6kCB